tougao/application/common/ReferenceCheckService.php

<?php

namespace app\common;

use think\Db;
use think\Env;
use app\common\service\LLMService;
use app\common\mq\ReferenceCheckMqPublisher;

/**
 * 正文 &lt;blue&gt;[n]&lt;/blue&gt; 引用与 t_production_article_refer（index+1=n）相关性校对。
 * LLM 配置与 PromotionLlmService 相同；异步任务走 RabbitMQ（一篇一条消息）。
 */
class ReferenceCheckService
{
    /** API 返回：异步传输方式（RabbitMQ 文章批次） */
    const TRANSPORT_RABBITMQ = 'rabbitmq';

    /** t_article_main.type */
    const MAIN_TYPE_TEXT = 0;
    const MAIN_TYPE_IMAGE = 1;
    const MAIN_TYPE_TABLE = 2;

    /** t_article_main.ref_check_status（需执行 sql/article_main_ref_check_status.sql） */
    const AM_STATUS_NONE = 0;
    const AM_STATUS_PASS = 1;
    const AM_STATUS_FAIL = 2;
    const AM_STATUS_RUNNING = 3;

    /** @var bool|null t_article_main 是否已有 ref_check_status 列 */
    private static $amRefCheckStatusColumnExists = null;

    /** 单条任务最多重试次数（不含首次执行） */
    const QUEUE_MAX_RETRY = 1;

    /**
     * 引用校对状态（生命周期顺序：0→1→2→3 = 待→进行→完成→失败）
     *
     * 这套常量在两个维度共用：
     *   - 单条明细（article_reference_check_result.status）只会取 {0, 2, 3} —— 明细不会出现"校对中"
     *   - 分组（按 reference_no 聚合后的 progress_status）四个值都会用 —— 1=部分跑完、部分仍为 0
     */
    const PROGRESS_PENDING   = 0; // 待校验：明细 status=0；分组内全部明细 status=0
    const PROGRESS_CHECKING  = 1; // 校对中：仅分组层 —— 部分明细已结束、部分仍为 0
    const PROGRESS_COMPLETED = 2; // 校对完成：明细 status=2；分组内全部明细 status=2
    const PROGRESS_FAILED    = 3; // 校对失败：明细 status=3；分组内全部跑完、≥1 条 status=3

    /** 整篇文章的引用校对状态（对外整体状态，用于"开始/重置"按钮分流） */
    const ARTICLE_PROGRESS_NONE      = 0; // 还没有任何校对记录
    const ARTICLE_PROGRESS_RUNNING   = 1; // 至少 1 条明细 status=0（队列里还有未跑完的）
    const ARTICLE_PROGRESS_COMPLETED = 2; // 所有明细 status != 0（全部已完成或失败）

    /**
     * 单条校对明细的状态（DB 字段 article_reference_check_result.status）
     *
     * 这里只列实际写入 DB 的三种值。"校对中"（值 1）是分组层专用，明细不会出现。
     * 数值与 PROGRESS_* 对齐（同一套语义），方便前端/后端混用。
     */
    const RECORD_PENDING    = 0; // 待校对，已入队但还没被 worker 拾起
    const RECORD_COMPLETED  = 2; // 校对完成
    const RECORD_FAILED     = 3; // 校对失败

    /** 队列执行状态（queue_status） */
    const QUEUE_PENDING   = 0; // 已入队待执行
    const QUEUE_RUNNING   = 1; // worker 正在执行
    const QUEUE_COMPLETED = 2; // 执行完成
    const QUEUE_FAILED    = 3; // 最终失败（重试耗尽）

    /** LLM 评分（confidence）通过阈值：>= 该值视为"通过" */
    const PASS_CONFIDENCE_THRESHOLD = 0.65;

    /**
     * 正文引用标签两种排版（带 /u）：
     *   1) <blue>[8, 9]</blue>、<blue>[13-15]</blue>  —— 方括号在 blue 内
     *   2) [<blue>13-15</blue>]                        —— 方括号包裹 blue
     *
     * 捕获组均为序号串（可含逗号、区间连字符及排版变体）。
     */
    const BLUE_TAG_REGEX = '/<blue>\[([\d,，\-\x{2013}\x{2014}\x{2212}\x{2010}\x{2011}\s]+)\]<\/blue>/u';
    const BLUE_TAG_REGEX_BRACKET_OUTSIDE = '/\[<blue>([\d,，\-\x{2013}\x{2014}\x{2212}\x{2010}\x{2011}\s]+)<\/blue>\]/u';

    private $logFile;

    public function __construct()
    {
        $this->logFile = ROOT_PATH . 'runtime' . DS . 'plagiarism_task.log';
    }
    /**
     * 兼容无 ?? 的 PHP 版本
     */
    private function arrGet($arr, $key, $default = '')
    {
        return isset($arr[$key]) ? $arr[$key] : $default;
    }

    /** 新建/重置校对明细时的队列初始字段 */
    private function newCheckRecordFields(array $fields, $queueStatus = self::QUEUE_PENDING, $retryCount = 0)
    {
        $fields['queue_status'] = intval($queueStatus);
        $fields['retry_count'] = max(0, intval($retryCount));
        return $fields;
    }

    public function markQueueRuntime($checkId, $queueStatus, $retryCount = null)
    {
        $checkId = intval($checkId);
        if ($checkId <= 0) {
            return 0;
        }
        $fields = ['queue_status' => intval($queueStatus)];
        if ($retryCount !== null) {
            $fields['retry_count'] = max(0, intval($retryCount));
        }
        return Db::name('article_reference_check_result')->where('id', $checkId)->update($fields);
    }

    /**
     * 合并匹配两种 blue 引用排版，按在正文中的起始位置排序。
     *
     * @return array{0: array, 1: array} 同 preg_match_all 的完整匹配与捕获组 1
     */
    private function collectBlueTagMatches($content)
    {
        $merged = [];
        foreach ([self::BLUE_TAG_REGEX, self::BLUE_TAG_REGEX_BRACKET_OUTSIDE] as $pattern) {
            if (!preg_match_all($pattern, $content, $m, PREG_OFFSET_CAPTURE)) {
                continue;
            }
            $count = count($m[0]);
            for ($i = 0; $i < $count; $i++) {
                $merged[] = ['full' => $m[0][$i], 'inner' => $m[1][$i]];
            }
        }

        usort($merged, function ($a, $b) {
            return $a['full'][1] - $b['full'][1];
        });

        $matches = [[], []];
        foreach ($merged as $item) {
            $matches[0][] = $item['full'];
            $matches[1][] = $item['inner'];
        }

        return $matches;
    }

    /** 对两种 blue 引用排版执行 preg_replace */
    private function pregReplaceBlueTags($subject, $replacement)
    {
        $subject = preg_replace(self::BLUE_TAG_REGEX, $replacement, $subject);
        $subject = preg_replace(self::BLUE_TAG_REGEX_BRACKET_OUTSIDE, $replacement, $subject);

        return $subject;
    }

    /**
     * 单条入队（可手工指定正文与文献文本）
     */
    public function enqueue($contentA, $contentB, array $extra = [])
    {
        $contentA = trim($contentA);
        if ($contentA === '') {
            throw new \InvalidArgumentException('content_a is required');
        }

        $now = date('Y-m-d H:i:s');
        $checkId = Db::name('article_reference_check_result')->insertGetId($this->newCheckRecordFields([
            'article_id'      => intval($this->arrGet($extra, 'article_id', 0)),
            'am_id'           => intval($this->arrGet($extra, 'am_id', 0)),
            'p_article_id'    => intval($this->arrGet($extra, 'p_article_id', 0)),
            'p_refer_id'      => intval($this->arrGet($extra, 'p_refer_id', 0)),
            'refer_index'     => intval($this->arrGet($extra, 'refer_index', 0)),
            'reference_no'    => intval($this->arrGet($extra, 'reference_no', 0)),
            'reference_raw'   => (string)$this->arrGet($extra, 'reference_raw', ''),
            'cite_tag_start'  => intval($this->arrGet($extra, 'cite_tag_start', 0)),
            'cite_tag_end'    => intval($this->arrGet($extra, 'cite_tag_end', 0)),
            'text_start'      => intval($this->arrGet($extra, 'text_start', 0)),
            'text_end'        => intval($this->arrGet($extra, 'text_end', 0)),
            'content_a'       => $contentA,
            'content_b'       => trim($contentB),
            'status'          => 0,
            'created_at'      => $now,
            'updated_at'      => $now,
        ]));

        $amId = intval($this->arrGet($extra, 'am_id', 0));
        if ($amId > 0) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_RUNNING);
        }

        $this->startArticleCheckQueue([intval($checkId)], intval($this->arrGet($extra, 'p_article_id', 0)), 'enqueue');

        return ['check_id' => $checkId, 'queued' => 1];
    }
    public function enqueueByArticleMain($main){
        $amId = intval($this->arrGet($main, 'am_id', 0));
        if ($amId > 0 && (!isset($main['type']) || (intval($main['type']) === self::MAIN_TYPE_TABLE && intval($this->arrGet($main, 'amt_id', 0)) <= 0))) {
            $dbMain = Db::name('article_main')
                ->field('am_id,content,article_id,type,amt_id')
                ->where('am_id', $amId)
                ->whereIn('state', [0, 2])
                ->find();
            if (!empty($dbMain)) {
                $main = array_merge($dbMain, $main);
            }
        }
        $citations = $this->extractReferencesForArticleMain($main);
        if (empty($citations)) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_NONE);
            return;
        }
        $prod = Db::name('production_article')
            ->where('article_id', $main['article_id'])
            ->where('state', 0)
            ->find();
        if (empty($prod)) {
            throw new \RuntimeException('production_article not found for article_id=' . $main['article_id']);
        }

        $pArticleId = intval($prod['p_article_id']);
        $referMap = $this->loadReferMapByPArticleId($pArticleId);

        if (empty($citations)) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_PASS);
            return;
        }

        $skipped = 0;
        $pendingJobs = [];
        $now = date('Y-m-d H:i:s');
        foreach ($citations as $cite) {
            foreach ($cite['reference_numbers'] as $refNo) {
                $referIndex = $refNo - 1;
                if ($referIndex < 0 || !isset($referMap[$referIndex])) {
                    $skipped++;
                    continue;
                }
                $refer = $referMap[$referIndex];
                $referText = $this->formatReferForLlm($refer);

                $checkId = Db::name('article_reference_check_result')->insertGetId($this->newCheckRecordFields([
                    'article_id'      => $main['article_id'],
                    'p_article_id'    => $pArticleId,
                    'am_id'           => intval($main['am_id']),
                    'reference_no'    => $refNo,
                    'refer_index'     => $refNo,
                    'origin_text'     => $cite['original_text'],
                    'refer_text'      => $referText,
                    'p_refer_id'      => $referMap[$referIndex]['p_refer_id'],
                    'text_start'      => $cite['text_start'],
                    'text_end'        => $cite['text_end'],
                    'status'          => self::RECORD_PENDING,
                    'created_at'      => $now,
                    'updated_at'      => $now,
                ]));
                $pendingJobs[] = [
                    'check_id'     => intval($checkId),
                    'reference_no' => intval($refNo),
                    'am_id'        => intval($main['am_id']),
                    'text_start'   => intval($cite['text_start']),
                ];
            }
        }

        $this->enqueueChecksSortedByReferenceNo($pendingJobs, $pArticleId, 'enqueue');
        $this->setAmRefCheckStatus($amId, self::AM_STATUS_RUNNING);
    }
    /**
     * 手工触发：对已完成且 confidence<=0.65 的记录同步执行 Crossref 二轮复核
     */
    public function enqueueSecondPassByArticle($articleId)
    {
        $articleId = intval($articleId);
        if ($articleId <= 0) {
            throw new \InvalidArgumentException('article_id is required');
        }

        $rows = Db::name('article_reference_check_result')
            ->where('article_id', $articleId)
            ->where('status', self::RECORD_COMPLETED)
            ->where('confidence', '<=', 0.65)
            ->orderRaw('rand()')
            ->limit(2)
            ->select();

        $checkIds2 = [];
        $delay2 = 0;
        foreach ($rows as $checkLog) {
            $rowId = $this->resolveCheckRowId($checkLog);
            if ($this->runSecondPassIfNeeded($rowId, floatval($checkLog['confidence']))) {
                $checkIds2[] = $rowId;
                $delay2 += 1;
            }
        }

        return [
            'article_id'  => $articleId,
            'check_ids2'  => $checkIds2,
            'queued'      => count($checkIds2),
        ];
    }
    public function enqueueByPArticle($prod){
        if (empty($prod)) {
            throw new \RuntimeException('production_article not found');
        }
        $pArticleId = intval($prod['p_article_id']);
        $articleId = intval($prod['article_id']);
        $referMap = $this->loadReferMapByPArticleId($pArticleId);

        $mains = Db::name('article_main')
            ->field('am_id,content,article_id,type,amt_id')
            ->where('article_id', $articleId)
            ->whereIn('state', [0, 2])
            ->order('sort asc')
            ->select();
        if (empty($mains)) {
            throw new \RuntimeException('article_main is empty');
        }
        $queued = 0;
        $skipped = 0;
        $pendingJobs = [];
        $amIdsWithJobs = [];
        $now = date('Y-m-d H:i:s');
        foreach ($mains as $main) {
            $amId = intval($main['am_id']);
            $citations = $this->extractReferencesForArticleMain($main);
            if (empty($citations)) {
                $this->setAmRefCheckStatus($amId, self::AM_STATUS_NONE);
                continue;
            }
            foreach ($citations as $cite) {
                foreach ($cite['reference_numbers'] as $refNo) {
                    $referIndex = $refNo - 1;
                    if ($referIndex < 0 || !isset($referMap[$referIndex])) {
                        $skipped++;
                        continue;
                    }
                    $refer = $referMap[$referIndex];
                    $referText = $this->formatReferForLlm($refer);

                    // [70-73] 展开为 reference_no=70,71,72,73 共 4 条记录；先入队表，再按文献号正序校对
                    $checkId = Db::name('article_reference_check_result')->insertGetId($this->newCheckRecordFields([
                        'article_id'      => $main['article_id'],
                        'p_article_id'    => $pArticleId,
                        'am_id'           => $amId,
                        'reference_no'    => $refNo,
                        'refer_index'     => $refNo,
                        'origin_text'     => $cite['original_text'],
                        'refer_text'      => $referText,
                        'p_refer_id'      => $referMap[$referIndex]['p_refer_id'],
                        'text_start'      => $cite['text_start'],
                        'text_end'        => $cite['text_end'],
                        'status'          => self::RECORD_PENDING,
                        'created_at'      => $now,
                        'updated_at'      => $now,
                    ]));

                    $pendingJobs[] = [
                        'check_id'     => intval($checkId),
                        'reference_no' => intval($refNo),
                        'am_id'        => $amId,
                        'text_start'   => intval($cite['text_start']),
                    ];
                    $queued++;
                    $amIdsWithJobs[$amId] = true;
                }
            }
        }
        $checkIds = $this->enqueueChecksSortedByReferenceNo($pendingJobs, $pArticleId, 'enqueue');
        foreach (array_keys($amIdsWithJobs) as $amId) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_RUNNING);
        }

        return [
            'article_id'   => $articleId,
            'p_article_id' => $pArticleId,
            'queued'       => $queued,
            'skipped'      => $skipped,
            'check_ids'    => $checkIds,
            'queue'        => self::TRANSPORT_RABBITMQ,
        ];
    }
    public function enqueueByArticle($articleId){
        if ($articleId <= 0) {
            throw new \InvalidArgumentException('article_id is required');
        }
        $prod = Db::name('production_article')
            ->where('article_id', $articleId)
            ->whereIn('state', [0, 2])
            ->find();
        if (empty($prod)) {
            throw new \RuntimeException('production_article not found for article_id=' . $articleId);
        }
        $pArticleId = intval($prod['p_article_id']);
        $referMap = $this->loadReferMapByPArticleId($pArticleId);

        $mains = Db::name('article_main')
            ->field('am_id,content,article_id,type,amt_id')
            ->where('article_id', $articleId)
            ->whereIn('state', [0, 2])
            ->order('sort asc')
            ->select();
        if (empty($mains)) {
            throw new \RuntimeException('article_main is empty');
        }
        $queued = 0;
        $skipped = 0;
        $pendingJobs = [];
        $amIdsWithJobs = [];
        $now = date('Y-m-d H:i:s');
        foreach ($mains as $main) {
            $amId = intval($main['am_id']);
            $citations = $this->extractReferencesForArticleMain($main);
            if (empty($citations)) {
                $this->setAmRefCheckStatus($amId, self::AM_STATUS_NONE);
                continue;
            }
            foreach ($citations as $cite) {
                foreach ($cite['reference_numbers'] as $refNo) {
                    $referIndex = $refNo - 1;
                    if ($referIndex < 0 || !isset($referMap[$referIndex])) {
                        $skipped++;
                        continue;
                    }
                    $refer = $referMap[$referIndex];
                    $referText = $this->formatReferForLlm($refer);

                    // [70-73] 展开为 reference_no=70,71,72,73 共 4 条记录；先入队表，再按文献号正序校对
                    $checkId = Db::name('article_reference_check_result')->insertGetId($this->newCheckRecordFields([
                        'article_id'      => $main['article_id'],
                        'p_article_id'    => $pArticleId,
                        'am_id'           => $amId,
                        'reference_no'    => $refNo,
                        'refer_index'     => $refNo,
                        'origin_text'     => $cite['original_text'],
                        'refer_text'      => $referText,
                        'p_refer_id'      => $referMap[$referIndex]['p_refer_id'],
                        'text_start'      => $cite['text_start'],
                        'text_end'        => $cite['text_end'],
                        'status'          => self::RECORD_PENDING,
                        'created_at'      => $now,
                        'updated_at'      => $now,
                    ]));

                    $pendingJobs[] = [
                        'check_id'     => intval($checkId),
                        'reference_no' => intval($refNo),
                        'am_id'        => $amId,
                        'text_start'   => intval($cite['text_start']),
                    ];
                    $queued++;
                    $amIdsWithJobs[$amId] = true;
                }
            }
        }

        $checkIds = $this->enqueueChecksSortedByReferenceNo($pendingJobs, $pArticleId, 'enqueue');
        foreach (array_keys($amIdsWithJobs) as $amId) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_RUNNING);
        }

        return [
            'article_id'   => $articleId,
            'p_article_id' => $pArticleId,
            'queued'       => $queued,
            'skipped'      => $skipped,
            'check_ids'    => $checkIds,
            'queue'        => self::TRANSPORT_RABBITMQ,
        ];
    }

    /**
     * 根据该节全部明细行汇总更新 t_article_main.ref_check_status
     */
    public function syncAmRefCheckStatus($amId)
    {
        if ($amId <= 0) {
            return self::AM_STATUS_NONE;
        }

        $rows = Db::name('article_reference_check_result')->where('am_id', $amId)->select();
        if (empty($rows)) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_NONE);
            return self::AM_STATUS_NONE;
        }

        $pending = 0;
        $hasFail = false;
        $done = 0;

        foreach ($rows as $row) {
            $st = intval($row['status']);
            if ($st === self::RECORD_PENDING) {
                $pending++;
                continue;
            }
            if ($st === self::RECORD_FAILED || ($st === self::RECORD_COMPLETED && intval($row['is_match']) === 0)) {
                $hasFail = true;
            }
            if ($st === self::RECORD_COMPLETED) {
                $done++;
            }
        }

        if ($pending > 0) {
            $status = self::AM_STATUS_RUNNING;
        } elseif ($hasFail) {
            $status = self::AM_STATUS_FAIL;
        } elseif ($done === count($rows)) {
            $status = self::AM_STATUS_PASS;
        } else {
            $status = self::AM_STATUS_FAIL;
        }

        $this->setAmRefCheckStatus($amId, $status);
        return $status;
    }

    /**
     * t_article_main 是否已加 ref_check_status 列（未迁移时跳过写入，避免 fields not exists）
     */
    private function hasAmRefCheckStatusColumn()
    {
        if (self::$amRefCheckStatusColumnExists !== null) {
            return self::$amRefCheckStatusColumnExists;
        }
        try {
            $table = Db::name('article_main')->getTable();
            $rows = Db::query('SHOW COLUMNS FROM `' . str_replace('`', '``', $table) . '` LIKE \'ref_check_status\'');
            self::$amRefCheckStatusColumnExists = !empty($rows);
        } catch (\Exception $e) {
            self::$amRefCheckStatusColumnExists = false;
        }
        return self::$amRefCheckStatusColumnExists;
    }

    public function setAmRefCheckStatus($amId, $status)
    {
        if ($amId <= 0 || !$this->hasAmRefCheckStatusColumn()) {
            return;
        }
        Db::name('article_main')->where('am_id', $amId)->update([
            'ref_check_status' => $status,
        ]);
    }

    /**
     * 按 p_article_id 清空整篇文章的引用校对明细 + 重置节级 ref_check_status。
     *
     * 用于新增/删除文献后，旧的 reference_no 全部错位、原校对结果失效的场景：
     * 物理删除后，整篇状态查询自然回到 ARTICLE_PROGRESS_NONE（未校对）。
     *
     * @return int 被删除的明细条数
     */
    public function clearArticleChecksByPArticleId($pArticleId)
    {
        $pArticleId = intval($pArticleId);
        if ($pArticleId <= 0) {
            return 0;
        }

        // 先反查 article_id（用于重置 article_main.ref_check_status 节级状态）
        $articleId = intval(Db::name('production_article')
            ->where('p_article_id', $pArticleId)
            ->whereIn('state', [0, 2])
            ->value('article_id'));

        $deleted = Db::name('article_reference_check_result')
            ->where('p_article_id', $pArticleId)
            ->delete();

        if ($articleId > 0 && $this->hasAmRefCheckStatusColumn()) {
            Db::name('article_main')
                ->where('article_id', $articleId)
                ->whereIn('state', [0, 2])
                ->update(['ref_check_status' => self::AM_STATUS_NONE]);
        }

        return intval($deleted);
    }

    public function clearArticleChecks($articleId)
    {
        $articleId = intval($articleId);
        if ($articleId <= 0) {
            return 0;
        }

        $deleted = Db::name('article_reference_check_result')->where('article_id', $articleId)->delete();
        if ($this->hasAmRefCheckStatusColumn()) {
            Db::name('article_main')
                ->where('article_id', $articleId)
                ->whereIn('state', [0, 2])
                ->update(['ref_check_status' => self::AM_STATUS_NONE]);
        }

        return intval($deleted);
    }

    /**
     * 文献列表局部挪动后，仅刷新指定 p_refer_id 对应的校对明细 reference_no / refer_index。
     *
     * 读 production_article_refer 的最新 index 来算新序号（index + 1），避免外部传入过期值。
     * 仅更新受影响的两条左右记录，降低与并发挪动互相覆盖的风险。
     *
     * @param int[] $pReferIds   受影响的 p_refer_id（一般为 2 个：被挪条目 + 其相邻条目）
     * @param int   $pArticleId  可选：附加 p_article_id 限定，进一步缩小行锁范围
     * @return array{p_refer_ids:int[], affected_rows:int, changes:array}
     */
    public function syncReferenceNoByPReferIds(array $pReferIds, $pArticleId = 0)
    {
        $pReferIds = array_values(array_unique(array_filter(array_map('intval', $pReferIds))));
        $pArticleId = intval($pArticleId);
        if (empty($pReferIds)) {
            return [
                'p_refer_ids'   => [],
                'affected_rows' => 0,
                'changes'       => [],
            ];
        }

        $referQuery = Db::name('production_article_refer')
            ->field('p_refer_id,p_article_id,index')
            ->whereIn('p_refer_id', $pReferIds)
            ->where('state', 0);
        if ($pArticleId > 0) {
            $referQuery->where('p_article_id', $pArticleId);
        }
        $refers = $referQuery->select();
        if (empty($refers)) {
            return [
                'p_refer_ids'   => $pReferIds,
                'affected_rows' => 0,
                'changes'       => [],
            ];
        }

        $now = date('Y-m-d H:i:s');
        $affected = 0;
        $changes = [];

        foreach ($refers as $refer) {
            $pReferId = intval($refer['p_refer_id']);
            $newNo = intval($refer['index']) + 1;

            $updateQuery = Db::name('article_reference_check_result')
                ->where('p_refer_id', $pReferId)
                ->where('reference_no', '<>', $newNo);
            if ($pArticleId > 0) {
                $updateQuery->where('p_article_id', $pArticleId);
            }
            $rows = $updateQuery->update([
                'reference_no' => $newNo,
                'refer_index'  => $newNo,
                'updated_at'   => $now,
            ]);

            if ($rows > 0) {
                $affected += intval($rows);
                $changes[] = [
                    'p_refer_id'    => $pReferId,
                    'new_ref_no'    => $newNo,
                    'affected_rows' => intval($rows),
                ];
            }
        }

        return [
            'p_refer_ids'   => $pReferIds,
            'affected_rows' => $affected,
            'changes'       => $changes,
        ];
    }

    /**
     * 重置整篇稿件的引用校对：删除旧明细 + 清理队列锁 + 全文重新入队校对
     *
     * @return array
     */
    /**
     * 按 p_article_id 查整篇文章的引用校对总状态。
     *
     * 统计维度是"参考文献"（按 reference_no 分组），不是单条校对明细行。
     * 例如 50 条参考文献、底层明细 111 条时，total 返回 50。
     *
     * 返回 status 数值含义（整篇）：
     *   0 = ARTICLE_PROGRESS_NONE       一条校对记录都没有
     *   1 = ARTICLE_PROGRESS_RUNNING    至少 1 条参考文献仍有未跑完的明细
     *   2 = ARTICLE_PROGRESS_COMPLETED  所有参考文献的全部明细都已结束
     *
     * 每条参考文献按其明细 status 分布落桶（互斥）：
     *   pending —— 组内任一明细 status=0（含部分跑完的"校对中"也归此桶）
     *   done    —— 组内全部明细 status=2(完成)
     *   failed  —— 组内全部明细已结束、至少 1 条 status=3(失败)
     *
     * pending + done + failed = total；progress_percent = (done + failed) / total。
     * 分组明细请走 getProgressByPArticleId（控制器 referenceCheckProgressAI）。
     *
     * @return array{p_article_id:int, status:int, total:int, pending:int, done:int, failed:int, progress_percent:float}
     */
    public function getArticleProgressStatusByPArticleId($pArticleId)
    {
        $pArticleId = intval($pArticleId);
        if ($pArticleId <= 0) {
            throw new \InvalidArgumentException('p_article_id is required');
        }

        // 一条 SQL 按 reference_no 聚合，组内 status 分布一并算出来；
        // 50 条参考文献 → 返回 50 行，PHP 走一次循环分桶即可
        $rows = Db::name('article_reference_check_result')
            ->field('reference_no'
                . ', SUM(CASE WHEN status = ' . self::RECORD_PENDING . ' THEN 1 ELSE 0 END) AS pending_cnt'
                . ', SUM(CASE WHEN status = ' . self::RECORD_FAILED . ' THEN 1 ELSE 0 END) AS failed_cnt')
            ->where('p_article_id', $pArticleId)
            ->group('reference_no')
            ->select();

        if (empty($rows)) {
            return [
                'p_article_id'     => $pArticleId,
                'status'           => self::ARTICLE_PROGRESS_NONE,
                'total'            => 0,
                'pending'          => 0,
                'done'             => 0,
                'failed'           => 0,
                'progress_percent' => 0,
            ];
        }

        $pending = 0;
        $done = 0;
        $failed = 0;
        foreach ($rows as $row) {
            $pendingCnt = intval($this->arrGet($row, 'pending_cnt', 0));
            $failedCnt = intval($this->arrGet($row, 'failed_cnt', 0));
            if ($pendingCnt > 0) {
                $pending++;
            } elseif ($failedCnt > 0) {
                $failed++;
            } else {
                $done++;
            }
        }

        $total = count($rows);
        $articleStatus = $pending > 0
            ? self::ARTICLE_PROGRESS_RUNNING
            : self::ARTICLE_PROGRESS_COMPLETED;
        $finished = $done + $failed;
        $progressPercent = round($finished / $total * 100, 1);

        return [
            'p_article_id'     => $pArticleId,
            'status'           => $articleStatus,
            'total'            => $total,
            'pending'          => $pending,
            'done'             => $done,
            'failed'           => $failed,
            'progress_percent' => $progressPercent,
        ];
    }

    /**
     * 多篇文章并行校对时，查询指定文章前面还有几篇在排队。
     *
     * 「正在校对」= 该文至少还有 1 条明细 status=待校验(0)。
     * 排队顺序：按各文章最早一条待校验明细的 id 升序（与全局入队先后一致）。
     *
     * @return array{
     *   p_article_id:int,
     *   running_total:int,
     *   ahead:int,
     *   position:int,
     *   in_queue:bool,
     *   status:int
     * }
     */
    public function getArticleCheckQueuePositionByPArticleId($pArticleId)
    {
        $pArticleId = intval($pArticleId);
        if ($pArticleId <= 0) {
            throw new \InvalidArgumentException('p_article_id is required');
        }

        $rows = Db::name('article_reference_check_result')
            ->field('p_article_id, MIN(id) AS queue_anchor')
            ->where('status', self::RECORD_PENDING)
            ->group('p_article_id')
            ->order('queue_anchor', 'asc')
            ->select();

        $runningIds = [];
        foreach ($rows as $row) {
            $aid = intval($this->arrGet($row, 'p_article_id', 0));
            if ($aid > 0) {
                $runningIds[] = $aid;
            }
        }

        $runningTotal = count($runningIds);
        $ahead = 0;
        $position = 0;
        $inQueue = false;
        foreach ($runningIds as $idx => $aid) {
            if ($aid === $pArticleId) {
                $ahead = $idx;
                $position = $idx + 1;
                $inQueue = true;
                break;
            }
        }

        $articleStatus = $this->getArticleProgressStatusByPArticleId($pArticleId);

        return [
            'p_article_id'   => $pArticleId,
            'running_total'  => $runningTotal,
            'ahead'          => $inQueue ? $ahead : 0,
            'position'       => $inQueue ? $position : 0,
            'in_queue'       => $inQueue,
            'status'         => intval($this->arrGet($articleStatus, 'status', self::ARTICLE_PROGRESS_NONE)),
        ];
    }

    /**
     * 按 p_article_id 查整篇引用校对进度，按 reference_no 分组聚合状态，并展开每条明细。
     *
     * 状态映射统一遵循"生命周期顺序"（PROGRESS_* / RECORD_* 取值一致）：
     *   0 = 待校验   1 = 校对中（仅分组层）   2 = 校对完成   3 = 校对失败
     *
     * 分组（reference_no）状态返回字段 progress_status：
     *   - 0 = PROGRESS_PENDING   分组内全部明细 status=0
     *   - 1 = PROGRESS_CHECKING  分组内部分明细已结束、部分仍为 0（明细不会出现此值）
     *   - 2 = PROGRESS_COMPLETED 分组内全部明细 status=2
     *   - 3 = PROGRESS_FAILED    分组内全部明细已结束、且至少 1 条 status=3
     *
     * records[i] 字段：
     *   - status     0=待校验 2=完成 3=失败（与分组同一套数值含义，不会出现 1）
     *   - confidence LLM 评分
     *   - is_pass    confidence >= PASS_CONFIDENCE_THRESHOLD 视为通过
     *
     * @return array{p_article_id:int, total_groups:int, summary:array, list:array}
     */
    public function getProgressByPArticleId($pArticleId)
    {
        $pArticleId = intval($pArticleId);
        if ($pArticleId <= 0) {
            throw new \InvalidArgumentException('p_article_id is required');
        }

        $rows = Db::name('article_reference_check_result')
            ->field('id,p_refer_id,reference_no,am_id,status,confidence,is_match,reason,text_start,text_end,updated_at')
            ->where('p_article_id', $pArticleId)
            ->order('reference_no asc, id asc')
            ->select();

        // summary 用字符串键，避免数值下标看不出含义；同时保留数值键和 PROGRESS_* 常量对照
        $summary = [
            'pending'   => 0, // PROGRESS_PENDING   = 0
            'checking'  => 0, // PROGRESS_CHECKING  = 1
            'completed' => 0, // PROGRESS_COMPLETED = 2
            'failed'    => 0, // PROGRESS_FAILED    = 3
        ];
        if (empty($rows)) {
            return [
                'p_article_id' => $pArticleId,
                'total_groups' => 0,
                'summary'      => $summary,
                'list'         => [],
            ];
        }

        $groups = [];
        foreach ($rows as $row) {
            $refNo = intval($this->arrGet($row, 'reference_no', 0));
            $pReferId = intval($this->arrGet($row, 'p_refer_id', 0));
            if (!isset($groups[$refNo])) {
                $groups[$refNo] = [
                    'reference_no'    => $refNo,
                    'p_refer_id'      => $pReferId,
                    'total'           => 0,
                    'pending'         => 0,
                    'done'            => 0,
                    'failed'          => 0,
                    'pass'            => 0,
                    'last_updated_at' => '',
                    'records'         => [],
                ];
            }
            // 同一 reference_no 理论上只对应一个 p_refer_id；如果出现混淆，保留首次出现的非空 id
            if ($groups[$refNo]['p_refer_id'] <= 0 && $pReferId > 0) {
                $groups[$refNo]['p_refer_id'] = $pReferId;
            }

            $groups[$refNo]['total']++;
            $st = intval($this->arrGet($row, 'status', 0));
            // record 仅存 {0=待校验, 2=完成, 3=失败}；不会出现 1（校对中）
            if ($st === self::RECORD_PENDING) {
                $groups[$refNo]['pending']++;
            } elseif ($st === self::RECORD_COMPLETED) {
                $groups[$refNo]['done']++;
            } elseif ($st === self::RECORD_FAILED) {
                $groups[$refNo]['failed']++;
            }

            $upd = (string)$this->arrGet($row, 'updated_at', '');
            if ($upd > $groups[$refNo]['last_updated_at']) {
                $groups[$refNo]['last_updated_at'] = $upd;
            }

            $confidence = floatval($this->arrGet($row, 'confidence', 0));
            $isPass = $confidence >= self::PASS_CONFIDENCE_THRESHOLD;
            if ($isPass) {
                $groups[$refNo]['pass']++;
            }

            $groups[$refNo]['records'][] = [
                'check_id'        => intval($this->arrGet($row, 'id', 0)),
                'am_id'           => intval($this->arrGet($row, 'am_id', 0)),
                'status'          => $st,
                'confidence'      => $confidence,
                'is_pass'         => $isPass,
                'is_match'        => intval($this->arrGet($row, 'is_match', 0)),
                'reason'          => (string)$this->arrGet($row, 'reason', ''),
                'text_start'      => intval($this->arrGet($row, 'text_start', 0)),
                'text_end'        => intval($this->arrGet($row, 'text_end', 0)),
                'last_updated_at' => $upd,
            ];
        }

        $list = [];
        foreach ($groups as $g) {
            $total = $g['total'];
            $pending = $g['pending'];
            $failed = $g['failed'];
            $pass = $g['pass'];

            if ($pending === $total) {
                $progressStatus = self::PROGRESS_PENDING;
            } elseif ($pending === 0) {
                $progressStatus = $failed > 0 ? self::PROGRESS_FAILED : self::PROGRESS_COMPLETED;
            } else {
                $progressStatus = self::PROGRESS_CHECKING;
            }

            // 整体通过校验：分组已全部完成（无 pending、无 failed），且每条 confidence >= 0.65
            $g['is_pass'] = (
                $progressStatus === self::PROGRESS_COMPLETED
                && $total > 0
                && $pass === $total
            );

            switch ($progressStatus) {
                case self::PROGRESS_PENDING:   $summary['pending']++;   break;
                case self::PROGRESS_CHECKING:  $summary['checking']++;  break;
                case self::PROGRESS_COMPLETED: $summary['completed']++; break;
                case self::PROGRESS_FAILED:    $summary['failed']++;    break;
            }
            $g['progress_status'] = $progressStatus;
            $list[] = $g;
        }

        usort($list, function ($a, $b) {
            return $a['reference_no'] - $b['reference_no'];
        });

        return [
            'p_article_id' => $pArticleId,
            'total_groups' => count($list),
            'summary'      => $summary,
            'list'         => $list,
        ];
    }

    /**
     * 按 p_refer_id 查这条参考文献的校对明细与分组进度。
     *
     * 分组进度（与 referenceCheckProgressAI 单条 list 项口径一致）：
     *   progress_status  0待校验 1校对中 2完成 3失败
     *   pending/done/failed/pass、is_pass、progress_percent
     *
     * list 每项：check_id、am_id、status、confidence、reason、is_match、is_pass
     *
     * @param  int $pReferId production_article_refer.p_refer_id
     * @return array
     */
    public function getCheckDetailsByPReferId($pReferId)
    {
        $pReferId = intval($pReferId);
        if ($pReferId <= 0) {
            throw new \InvalidArgumentException('p_refer_id is required');
        }

        $rows = Db::name('article_reference_check_result')
            ->field('id,p_article_id,reference_no,am_id,status,confidence,is_match,reason,updated_at')
            ->where('p_refer_id', $pReferId)
            ->order('id asc')
            ->select();

        $list = [];
        $pArticleId = 0;
        $referenceNo = 0;
        $pending = 0;
        $done = 0;
        $failed = 0;
        $pass = 0;
        $lastUpdatedAt = '';

        foreach ($rows as $row) {
            if ($pArticleId <= 0) {
                $pArticleId = intval($this->arrGet($row, 'p_article_id', 0));
            }
            if ($referenceNo <= 0) {
                $referenceNo = intval($this->arrGet($row, 'reference_no', 0));
            }

            $st = intval($this->arrGet($row, 'status', 0));
            if ($st === self::RECORD_PENDING) {
                $pending++;
            } elseif ($st === self::RECORD_COMPLETED) {
                $done++;
            } elseif ($st === self::RECORD_FAILED) {
                $failed++;
            }

            $upd = (string)$this->arrGet($row, 'updated_at', '');
            if ($upd > $lastUpdatedAt) {
                $lastUpdatedAt = $upd;
            }

            $confidence = floatval($this->arrGet($row, 'confidence', 0));
            $isPass = $confidence >= self::PASS_CONFIDENCE_THRESHOLD;
            if ($isPass) {
                $pass++;
            }

            $list[] = [
                'check_id'   => intval($this->arrGet($row, 'id', 0)),
                'am_id'      => intval($this->arrGet($row, 'am_id', 0)),
                'status'     => $st,
                'confidence' => $confidence,
                'reason'     => (string)$this->arrGet($row, 'reason', ''),
                'is_match'   => intval($this->arrGet($row, 'is_match', 0)),
                'is_pass'    => $isPass,
            ];
        }

        if ($referenceNo <= 0) {
            $refer = Db::name('production_article_refer')
                ->where('p_refer_id', $pReferId)
                ->where('state', 0)
                ->find();
            if (!empty($refer)) {
                if ($pArticleId <= 0) {
                    $pArticleId = intval($this->arrGet($refer, 'p_article_id', 0));
                }
                $referenceNo = intval($this->arrGet($refer, 'index', 0)) + 1;
            }
        }

        $total = count($list);
        if ($total === 0) {
            $progressStatus = self::PROGRESS_PENDING;
            $progressPercent = 0;
            $isPassGroup = false;
        } elseif ($pending === $total) {
            $progressStatus = self::PROGRESS_PENDING;
            $progressPercent = 0;
            $isPassGroup = false;
        } elseif ($pending === 0) {
            $progressStatus = $failed > 0 ? self::PROGRESS_FAILED : self::PROGRESS_COMPLETED;
            $progressPercent = 100;
            $isPassGroup = (
                $progressStatus === self::PROGRESS_COMPLETED
                && $pass === $total
            );
        } else {
            $progressStatus = self::PROGRESS_CHECKING;
            $finished = $done + $failed;
            $progressPercent = round($finished / $total * 100, 1);
            $isPassGroup = false;
        }

        return [
            'p_refer_id'        => $pReferId,
            'p_article_id'      => $pArticleId,
            'reference_no'      => $referenceNo,
            'total'             => $total,
            'pending'           => $pending,
            'done'              => $done,
            'failed'            => $failed,
            'pass'              => $pass,
            'progress_status'   => $progressStatus,
            'progress_percent'  => $progressPercent,
            'is_pass'           => $isPassGroup,
            'last_updated_at'   => $lastUpdatedAt,
            'list'              => $list,
        ];
    }

    public function resetAndRecheckByArticle($aProductionArticle)
    {
        if (empty($aProductionArticle) || !is_array($aProductionArticle)) {
            throw new \InvalidArgumentException('production_article is required');
        }
        $pArticleId = intval($this->arrGet($aProductionArticle, 'p_article_id', 0));
        $articleId = intval($this->arrGet($aProductionArticle, 'article_id', 0));
        if ($pArticleId <= 0 || $articleId <= 0) {
            throw new \InvalidArgumentException('production_article requires both p_article_id and article_id');
        }

        $existing = Db::name('article_reference_check_result')
            ->where('p_article_id', $pArticleId)
            ->count();
        if (intval($existing) <= 0) {
            throw new \RuntimeException('no existing reference check records for p_article_id=' . $pArticleId);
        }

        $cleared = $this->clearArticleChecks($articleId);
        $enqueueResult = $this->enqueueByArticle($articleId);

        if (!is_array($enqueueResult)) {
            $enqueueResult = [];
        }
        $enqueueResult['cleared'] = $cleared;
        $enqueueResult['reset'] = 1;
        return $enqueueResult;
    }

    public static function amStatusLabel($status)
    {
        $map = [
            self::AM_STATUS_NONE    => 'none',
            self::AM_STATUS_PASS    => 'pass',
            self::AM_STATUS_FAIL    => 'fail',
            self::AM_STATUS_RUNNING => 'running',
        ];
        return isset($map[$status]) ? $map[$status] : 'unknown';
    }

    /**
     * 表主键为 id（对外 API 参数名仍叫 check_id）
     */
    public function resolveCheckRowId($row)
    {
        if (!is_array($row)) {
            return 0;
        }
        if (isset($row['id']) && intval($row['id']) > 0) {
            return intval($row['id']);
        }
        if (isset($row['check_id']) && intval($row['check_id']) > 0) {
            return intval($row['check_id']);
        }
        return 0;
    }

    /**
     * 解析 LLM 返回的 is_match（兼容 bool / 0|1 / "true"|"false" 字符串）
     */
    public function parseLlmIsMatch($value)
    {
        if (is_bool($value)) {
            return $value;
        }
        if (is_int($value) || is_float($value)) {
            return intval($value) === 1;
        }
        $s = strtolower(trim((string)$value));
        return in_array($s, ['1', 'true', 'yes', 'match', 'matched'], true);
    }

    /**
     * 写入单条校对结果（统一截断 reason/error_msg，避免 varchar(512) 导致 UPDATE 失败）
     *
     * @throws \RuntimeException
     */
    public function updateCheckResult($checkId, array $fields)
    {
        $checkId = intval($checkId);
        if ($checkId <= 0) {
            throw new \InvalidArgumentException('invalid check id');
        }

        if (isset($fields['reason'])) {
            $fields['reason'] = mb_substr(trim((string)$fields['reason']), 0, 512);
        }
        if (isset($fields['error_msg'])) {
            $fields['error_msg'] = mb_substr(trim((string)$fields['error_msg']), 0, 512);
        }
        $fields['updated_at'] = date('Y-m-d H:i:s');

        $exists = Db::name('article_reference_check_result')->where('id', $checkId)->find();
        if (empty($exists)) {
            throw new \RuntimeException('article_reference_check_result not found, id=' . $checkId);
        }

        $affected = Db::name('article_reference_check_result')->where('id', $checkId)->update($fields);
        if ($affected === false) {
            throw new \RuntimeException('article_reference_check_result update failed, id=' . $checkId);
        }

        \think\Log::info('updateCheckResult id=' . $checkId . ' affected=' . intval($affected));
        return intval($affected);
    }

    public function getResult($checkId)
    {
        if ($checkId <= 0) {
            return null;
        }
        $row = Db::name('article_reference_check_result')->where('id', $checkId)->find();
        return $row ?: null;
    }

    public function listByArticle($articleId, $status = -1, $onlyMismatch = false)
    {
        $q = Db::name('article_reference_check_result')->where('article_id', $articleId);
        if ($status >= 0) {
            $q->where('status', $status);
        }
        if ($onlyMismatch) {
            $q->where('status', self::RECORD_COMPLETED)->where('is_match', 0);
        }
        return $q->order('am_id asc, cite_tag_start asc, reference_no asc')->select();
    }

    /**
     * 稿件预览：在 content 上标记不合理引用序号与引用句
     *
     * @return array{sections: array, issues: array, stats: array}
     */
    public function buildArticlePreview($articleId, $amId = 0)
    {
        $fields = 'am_id,content,sort,type,amt_id';
        if ($this->hasAmRefCheckStatusColumn()) {
            $fields .= ',ref_check_status';
        }
        $q = Db::name('article_main')
            ->field($fields)
            ->where('article_id', $articleId)
            ->whereIn('state', [0, 2]);
        if ($amId > 0) {
            $q->where('am_id', $amId);
        }
        $mains = $q->order('sort asc')->select();

        $rows = $this->listByArticle($articleId, 1);
        $badByAm = $this->indexBadResults($rows);

        $sections = [];
        $issues = [];
        $stats = ['total' => 0, 'mismatch' => 0, 'match' => 0, 'pending' => 0];

        foreach ($this->listByArticle($articleId, -1) as $r) {
            $stats['total']++;
            if (intval($r['status']) === self::RECORD_PENDING) {
                $stats['pending']++;
            } elseif (intval($r['is_match']) === 1) {
                $stats['match']++;
            } else {
                $stats['mismatch']++;
            }
        }

        foreach ($mains as $main) {
            $id = intval($main['am_id']);
            $content = $this->resolveArticleMainCheckContent($main);
            $badIndex = isset($badByAm[$id]) ? $badByAm[$id] : array();
            $marked = $this->markContentForPreview($content, $id, $badIndex);
            $amStatus = intval($this->arrGet($main, 'ref_check_status', 0));
            $sections[] = [
                'am_id'              => $id,
                'ref_check_status'   => $amStatus,
                'ref_check_pass'     => $amStatus === self::AM_STATUS_PASS,
                'ref_check_label'    => self::amStatusLabel($amStatus),
                'content'            => $content,
                'content_marked'     => $marked['html'],
                'issue_count'        => $marked['issue_count'],
            ];
            foreach ($marked['issues'] as $issue) {
                $issues[] = $issue;
            }
        }

        $articlePass = $this->resolveArticlePass($sections);

        return [
            'article_id'          => $articleId,
            'article_ref_check_pass' => $articlePass,
            'sections'            => $sections,
            'issues'              => $issues,
            'stats'               => $stats,
        ];
    }

    /**
     * 全文是否通过：各节均为 pass，且无 running/fail（无引用节忽略）
     */
    private function resolveArticlePass($sections)
    {
        $hasChecked = false;
        foreach ($sections as $sec) {
            $st = intval($this->arrGet($sec, 'ref_check_status', 0));
            if ($st === self::AM_STATUS_NONE) {
                continue;
            }
            $hasChecked = true;
            if ($st !== self::AM_STATUS_PASS) {
                return false;
            }
        }
        return $hasChecked ? true : null;
    }

    /**
     * @param array $rows 已校对完成（status=RECORD_COMPLETED）但 is_match=0 的检测结果
     * @return array<int, array> am_id => indexed bad map
     */
    private function indexBadResults($rows)
    {
        $byAm = [];
        foreach ($rows as $row) {
            if (intval($row['status']) !== self::RECORD_COMPLETED || intval($row['is_match']) === 1) {
                continue;
            }
            $amId = intval($row['am_id']);
            $refNo = intval($row['reference_no']);
            if ($amId <= 0 || $refNo <= 0) {
                continue;
            }
            if (!isset($byAm[$amId])) {
                $byAm[$amId] = ['by_raw' => [], 'contexts' => []];
            }
            $rawKey = $this->normalizeRefRawKey((string)$this->arrGet($row, 'reference_raw', ''));
            if ($rawKey !== '') {
                $byAm[$amId]['by_raw'][$rawKey][$refNo] = $row;
            }

            $ctxKey = intval($row['text_start']) . '_' . intval($row['text_end']);
            if (!isset($byAm[$amId]['contexts'][$ctxKey])) {
                $byAm[$amId]['contexts'][$ctxKey] = [
                    'text_start' => intval($row['text_start']),
                    'text_end'   => intval($row['text_end']),
                    'check_ids'  => [],
                    'reasons'    => [],
                    'ref_nos'    => [],
                ];
            }
            $byAm[$amId]['contexts'][$ctxKey]['check_ids'][] = $this->resolveCheckRowId($row);
            $byAm[$amId]['contexts'][$ctxKey]['ref_nos'][] = $refNo;
            $reason = trim((string)$this->arrGet($row, 'reason', ''));
            if ($reason !== '') {
                $byAm[$amId]['contexts'][$ctxKey]['reasons'][$refNo] = $reason;
            }
        }
        return $byAm;
    }

    private function normalizeRefRawKey($raw)
    {
        $raw = str_replace(
            ['，', '–', '—', '−', '‐', '‑', ' '],
            [',', '-', '-', '-', '-', '-', ''],
            trim($raw)
        );
        return strtolower($raw);
    }

    /**
     * @param array $badIndex indexBadResults 中单 am 的结构
     */
    private function markContentForPreview($content, $amId, $badIndex)
    {
        $badByRaw = isset($badIndex['by_raw']) ? $badIndex['by_raw'] : array();
        $contexts = isset($badIndex['contexts']) ? $badIndex['contexts'] : array();
        $issues = array();
        $issueCount = 0;

        if ($content === '' || (empty($badByRaw) && empty($contexts))) {
            return array('html' => $content, 'issues' => array(), 'issue_count' => 0);
        }

        $html = $content;

        // 1) 先标记 blue 内各序号（在原文上操作，[70-73] 仅标不合理者如 70、71）
        $matches = $this->collectBlueTagMatches($html);
        $citeDeltas = [];
        if (!empty($matches[0])) {
            $replacements = [];
            foreach ($matches[0] as $idx => $match) {
                $fullTag = $match[0];
                $tagStart = $match[1];
                $tagEnd = $tagStart + strlen($fullTag);
                $inner = $matches[1][$idx][0];
                $rawKey = $this->normalizeRefRawKey($inner);
                $badNums = isset($badByRaw[$rawKey]) ? $badByRaw[$rawKey] : array();

                $innerMarked = preg_replace_callback(
                    '/\d+/',
                    function ($numMatch) use ($badNums, &$issues, &$issueCount, $amId, $inner) {
                        $num = intval($numMatch[0]);
                        if (!isset($badNums[$num])) {
                            return $numMatch[0];
                        }
                        $row = $badNums[$num];
                        $rowReason = isset($row['reason']) ? $row['reason'] : '';
                        $issueCount++;
                        $issues[] = array(
                            'am_id'         => $amId,
                            'check_id'      => $this->resolveCheckRowId($row),
                            'reference_no'  => $num,
                            'reference_raw' => $inner,
                            'reason'        => $rowReason,
                            'confidence'    => floatval(isset($row['confidence']) ? $row['confidence'] : 0),
                        );
                        $title = htmlspecialchars(
                            '引用[' . $num . ']不合理: ' . $rowReason,
                            ENT_QUOTES,
                            'UTF-8'
                        );
                        return '<span class="ref-no-error" data-check-id="' . $this->resolveCheckRowId($row)
                            . '" data-ref-no="' . $num . '" title="' . $title . '">'
                            . $numMatch[0] . '</span>';
                    },
                    $inner
                );

                $tagClass = !empty($badNums) ? ' ref-cite-error' : '';
                $groupIds = !empty($badNums)
                    ? implode(',', array_map(function ($row) {
                        return (int) $this->resolveCheckRowId($row);
                    }, $badNums))
                    : '';
                $newHtml = '<blue class="ref-cite-tag' . $tagClass . '" data-ref-raw="' . htmlspecialchars($inner, ENT_QUOTES, 'UTF-8')
                    . '" data-check-ids="' . $groupIds . '">[' . $innerMarked . ']</blue>';
                $replacements[] = [
                    'start' => $tagStart,
                    'end'   => $tagEnd,
                    'html'  => $newHtml,
                    'delta' => strlen($newHtml) - ($tagEnd - $tagStart),
                ];
            }
            usort($replacements, function ($a, $b) {
                return $b['start'] - $a['start'];
            });
            foreach ($replacements as $rep) {
                $html = substr($html, 0, $rep['start']) . $rep['html'] . substr($html, $rep['end']);
                $citeDeltas[] = ['start' => $rep['start'], 'delta' => $rep['delta']];
            }
        }

        $shiftByCite = function ($pos) use ($citeDeltas) {
            $d = 0;
            foreach ($citeDeltas as $cd) {
                if ($cd['start'] < $pos) {
                    $d += $cd['delta'];
                }
            }
            return $pos + $d;
        };

        // 2) 再标记引用句（从后往前）
        if (!empty($contexts)) {
            $spans = array_values($contexts);
            usort($spans, function ($a, $b) {
                return $b['text_start'] - $a['text_start'];
            });
            foreach ($spans as $span) {
                $start = $span['text_start'];
                $end = $span['text_end'];
                if ($start < 0 || $end <= $start) {
                    continue;
                }
                $s = $shiftByCite($start);
                $e = $shiftByCite($end);
                if ($e > strlen($html)) {
                    $e = strlen($html);
                }
                $checkIds = array_values(array_unique($span['check_ids']));
                $refNos = array_values(array_unique($span['ref_nos']));
                sort($refNos);
                $reasonParts = [];
                foreach ($refNos as $rn) {
                    if (!empty($span['reasons'][$rn])) {
                        $reasonParts[] = '[' . $rn . '] ' . $span['reasons'][$rn];
                    }
                }
                $title = htmlspecialchars(
                    '引用句可能不合理: ' . implode('; ', $reasonParts),
                    ENT_QUOTES,
                    'UTF-8'
                );
                $open = '<span class="ref-context-error" data-check-ids="' . implode(',', $checkIds)
                    . '" data-ref-nos="' . implode(',', $refNos) . '" title="' . $title . '">';
                $close = '</span>';
                $html = substr($html, 0, $s) . $open . substr($html, $s, $e - $s) . $close . substr($html, $e);
            }
        }

        return ['html' => $html, 'issues' => $issues, 'issue_count' => $issueCount];
    }

    /**
     * @return array<int, array> refer_index => row
     */
    public function loadReferMapByPArticleId($pArticleId)
    {
        $map = [];
        if ($pArticleId <= 0) {
            return $map;
        }
        $rows = Db::name('production_article_refer')
            ->where('p_article_id', $pArticleId)
            ->where('state', 0)
            ->order('index asc')
            ->select();
        foreach ($rows as $row) {
            $map[intval($row['index'])] = $row;
        }
        return $map;
    }
    public function formatReferForLlm($refer)
    {
        $parts = [];
        foreach (['title', 'author', 'joura', 'dateno', 'refer_doi', 'doilink'] as $f) {
            $v = trim((string)$this->arrGet($refer, $f, ''));
            if ($v !== '') {
                $parts[] = ucfirst($f) . ': ' . $v;
            }
        }
        $frag = trim((string)$this->arrGet($refer, 'refer_frag', ''));
        $content = trim((string)$this->arrGet($refer, 'refer_content', ''));
        if ($frag !== '') {
            $parts[] = 'Reference: ' . $frag;
        } elseif ($content !== '') {
            $parts[] = 'Reference: ' . $content;
        }
        return implode("\n", $parts);
    }

    /**
     * 编辑某条文献内容后，按 p_refer_id 异步重新校对该文献对应的全部 check 明细
     *
     * 流程：刷新 refer_text/refer_index → 重置 status/is_match/confidence/reason
     *      → 设节级 ref_check_status=RUNNING → 投递 RabbitMQ 文章批次
     *
     * 与 recheckByRefer 的差异：本方法**不**在请求内同步跑 LLM，仅入队，立即返回。
     * 前端可调 getProgressByPArticleId 轮询进度。
     *
     * @param int $pReferId   t_production_article_refer.p_refer_id（必填）
     * @param int $pArticleId 可选：传入跳过 refer 表二次查表
     * @return array{p_refer_id:int, p_article_id:int, reference_no:int, reset:int, queued:int, check_ids:int[], queue:string}
     */
    public function enqueueRecheckByPReferId($pReferId, $pArticleId = 0)
    {
        $pReferId = intval($pReferId);
        if ($pReferId <= 0) {
            throw new \InvalidArgumentException('p_refer_id is required');
        }

        $refer = Db::name('production_article_refer')
            ->where('p_refer_id', $pReferId)
            ->where('state', 0)
            ->find();
        if (empty($refer)) {
            throw new \RuntimeException('production_article_refer not found, p_refer_id=' . $pReferId);
        }

        $pArticleId = intval($pArticleId);
        if ($pArticleId <= 0) {
            $pArticleId = intval($this->arrGet($refer, 'p_article_id', 0));
        }
        if ($pArticleId <= 0) {
            throw new \RuntimeException('p_article_id is missing for p_refer_id=' . $pReferId);
        }

        $referenceNo = intval($this->arrGet($refer, 'index', 0)) + 1;
        $referText = $this->formatReferForLlm($refer);
        $now = date('Y-m-d H:i:s');

        $rows = Db::name('article_reference_check_result')
            ->where('p_article_id', $pArticleId)
            ->where('p_refer_id', $pReferId)
            ->select();

        if (empty($rows)) {
            return [
                'p_refer_id'   => $pReferId,
                'p_article_id' => $pArticleId,
                'reference_no' => $referenceNo,
                'reset'        => 0,
                'queued'       => 0,
                'check_ids'    => [],
                'queue'        => self::TRANSPORT_RABBITMQ,
            ];
        }

        $resetFields = $this->newCheckRecordFields([
            'refer_text'   => $referText,
            'refer_index'  => $referenceNo,
            'reference_no' => $referenceNo,
            'status'       => self::RECORD_PENDING,
            'is_match'     => 0,
            'can_support'  => 0,
            'confidence'   => 0,
            'reason'       => '',
            'error_msg'    => '',
            'updated_at'   => $now,
        ], self::QUEUE_PENDING, 0);

        $pendingJobs = [];
        $amIds = [];
        foreach ($rows as $row) {
            $checkId = $this->resolveCheckRowId($row);
            Db::name('article_reference_check_result')->where('id', $checkId)->update($resetFields);
            $pendingJobs[] = [
                'check_id'     => $checkId,
                'reference_no' => $referenceNo,
                'am_id'        => intval($this->arrGet($row, 'am_id', 0)),
                'text_start'   => intval($this->arrGet($row, 'text_start', 0)),
            ];
            $amId = intval($this->arrGet($row, 'am_id', 0));
            if ($amId > 0) {
                $amIds[$amId] = true;
            }
        }

        foreach (array_keys($amIds) as $amId) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_RUNNING);
        }

        $checkIds = $this->enqueueChecksSortedByReferenceNo($pendingJobs, $pArticleId, 'enqueue');

        return [
            'p_refer_id'   => $pReferId,
            'p_article_id' => $pArticleId,
            'reference_no' => $referenceNo,
            'reset'        => count($rows),
            'queued'       => count($checkIds),
            'check_ids'    => $checkIds,
            'queue'        => self::TRANSPORT_RABBITMQ,
        ];
    }

    /**
     * 某条参考文献下「校对失败」的明细重新校对（仅 status=RECORD_FAILED，异步入队）
     *
     * 不刷新 refer_text / reference_no，沿用记录内已有正文与文献快照，只重置结果字段后入队。
     *
     * @param int $pReferId   t_production_article_refer.p_refer_id（必填）
     * @param int $pArticleId 可选，进一步限定文章
     * @return array{p_refer_id:int, p_article_id:int, reset:int, queued:int, check_ids:int[], queue:string}
     */
    public function enqueueRecheckFailedByPReferId($pReferId, $pArticleId = 0)
    {
        $pReferId = intval($pReferId);
        if ($pReferId <= 0) {
            throw new \InvalidArgumentException('p_refer_id is required');
        }

        $q = Db::name('article_reference_check_result')
            ->where('p_refer_id', $pReferId)
            ->where('status', self::RECORD_FAILED);
        $pArticleId = intval($pArticleId);
        if ($pArticleId > 0) {
            $q->where('p_article_id', $pArticleId);
        }

        $rows = $q->select();

        if (empty($rows)) {
            return [
                'p_refer_id'   => $pReferId,
                'p_article_id' => $pArticleId,
                'reset'        => 0,
                'queued'       => 0,
                'check_ids'    => [],
                'queue'        => self::TRANSPORT_RABBITMQ,
            ];
        }

        if ($pArticleId <= 0) {
            $pArticleId = intval($this->arrGet($rows[0], 'p_article_id', 0));
        }

        $now = date('Y-m-d H:i:s');
        $resetFields = $this->newCheckRecordFields([
            'status'      => self::RECORD_PENDING,
            'is_match'    => 0,
            'can_support' => 0,
            'confidence'  => 0,
            'reason'      => '',
            'error_msg'   => '',
            'updated_at'  => $now,
        ], self::QUEUE_PENDING, 0);

        $pendingJobs = [];
        $amIds = [];
        foreach ($rows as $row) {
            $checkId = $this->resolveCheckRowId($row);
            Db::name('article_reference_check_result')->where('id', $checkId)->update($resetFields);
            $pendingJobs[] = [
                'check_id'     => $checkId,
                'reference_no' => intval($this->arrGet($row, 'reference_no', 0)),
                'am_id'        => intval($this->arrGet($row, 'am_id', 0)),
                'text_start'   => intval($this->arrGet($row, 'text_start', 0)),
            ];
            $amId = intval($this->arrGet($row, 'am_id', 0));
            if ($amId > 0) {
                $amIds[$amId] = true;
            }
        }

        foreach (array_keys($amIds) as $amId) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_RUNNING);
        }

        $checkIds = $this->enqueueChecksSortedByReferenceNo($pendingJobs, $pArticleId, 'recheck_failed');

        return [
            'p_refer_id'   => $pReferId,
            'p_article_id' => $pArticleId,
            'reset'        => count($rows),
            'queued'       => count($checkIds),
            'check_ids'    => $checkIds,
            'queue'        => self::TRANSPORT_RABBITMQ,
        ];
    }

    public function recheckByRefer($articleId, $pReferId = 0, $referenceNo = 0)
    {
        $articleId = intval($articleId);
        if ($articleId <= 0) {
            throw new \InvalidArgumentException('article_id is required');
        }

        $ctx = $this->resolveReferForRecheck($articleId, intval($pReferId), intval($referenceNo));
        $refer = $ctx['refer'];
        $pReferId = $ctx['p_refer_id'];
        $referenceNo = $ctx['reference_no'];
        $pArticleId = $ctx['p_article_id'];
        $referText = $this->formatReferForLlm($refer);
        $now = date('Y-m-d H:i:s');

        $rows = Db::name('article_reference_check_result')
            ->where('article_id', $articleId)
            ->where(function ($query) use ($pReferId, $referenceNo) {
                $query->where('p_refer_id', $pReferId)->whereOr('reference_no', $referenceNo);
            })
            ->select();

        if (empty($rows)) {
            return [
                'article_id'   => $articleId,
                'p_refer_id'   => $pReferId,
                'reference_no' => $referenceNo,
                'reset'        => 0,
                'queued'       => 0,
                'check_ids'    => [],
                'queue'        => self::TRANSPORT_RABBITMQ,
            ];
        }

        $resetFields = $this->newCheckRecordFields([
            'refer_text'   => $referText,
            'p_refer_id'   => $pReferId,
            'p_article_id' => $pArticleId,
            'refer_index'  => $referenceNo,
            'status'       => 0,
            'is_match'     => 0,
            'can_support'  => 0,
            'confidence'   => 0,
            'reason'       => '',
            'error_msg'    => '',
            'updated_at'   => $now,
        ], self::QUEUE_PENDING, 0);

        $pendingJobs = [];
        $amIds = [];
        foreach ($rows as $row) {
            $checkId = $this->resolveCheckRowId($row);
            Db::name('article_reference_check_result')->where('id', $checkId)->update($resetFields);
            $pendingJobs[] = [
                'check_id'     => $checkId,
                'reference_no' => $referenceNo,
                'am_id'        => intval($row['am_id']),
                'text_start'   => intval(isset($row['text_start']) ? $row['text_start'] : 0),
            ];
            $amId = intval($row['am_id']);
            if ($amId > 0) {
                $amIds[$amId] = true;
            }
        }

        foreach (array_keys($amIds) as $amId) {
            $this->setAmRefCheckStatus($amId, self::AM_STATUS_RUNNING);
        }

        usort($pendingJobs, function ($a, $b) {
            if ($a['reference_no'] !== $b['reference_no']) {
                return $a['reference_no'] - $b['reference_no'];
            }
            if ($a['am_id'] !== $b['am_id']) {
                return $a['am_id'] - $b['am_id'];
            }
            return $a['text_start'] - $b['text_start'];
        });

        $checkIds = [];
        $results = [];
        $failed = [];
        foreach ($pendingJobs as $job) {
            $checkId = intval($job['check_id']);
            $checkIds[] = $checkId;
            try {
                $results[] = $this->runReferenceCheckOnce($checkId);
            } catch (\Exception $e) {
                $failed[] = [
                    'check_id' => $checkId,
                    'error'    => $e->getMessage(),
                ];
                \think\Log::error('recheckByRefer check_id=' . $checkId . ' ' . $e->getMessage());
            }
        }

        foreach (array_keys($amIds) as $amId) {
            $this->syncAmRefCheckStatus($amId);
        }

        return [
            'article_id'   => $articleId,
            'p_refer_id'   => $pReferId,
            'reference_no' => $referenceNo,
            'reset'        => count($rows),
            'checked'      => count($results),
            'failed'       => count($failed),
            'check_ids'    => $checkIds,
            'results'      => $results,
            'errors'       => $failed,
        ];
    }

    /**
     * 执行一次引用 LLM 校对（同步，写回 article_reference_check_result）
     */
    public function runReferenceCheckOnce($checkId)
    {
        $checkId = intval($checkId);
        $row = Db::name('article_reference_check_result')->where('id', $checkId)->find();
        if (empty($row)) {
            throw new \RuntimeException('article_reference_check_result not found, id=' . $checkId);
        }

        $contentA = $this->resolveMainContentForJob($row);
        $refer = null;
        if (intval($row['p_refer_id']) > 0) {
            $refer = Db::name('production_article_refer')
                ->where('p_refer_id', intval($row['p_refer_id']))
                ->where('state', 0)
                ->find();
        }

        if ($refer) {
            $contentB = $this->formatReferForLlm($refer);
        } else {
            $contentB = trim((string)$this->arrGet($row, 'refer_text', ''));
        }

        if ($contentA === '' || $contentB === '') {
            $this->updateCheckResult($checkId, [
                'status'    => self::RECORD_FAILED,
                'error_msg' => 'Missing section content (text/table) or refer_text',
            ]);
            throw new \RuntimeException('Missing section content (text/table) or refer_text');
        }

        $llmResult = (new LLMService())->checkReference($contentA, $contentB, false);
        $requestFailed = !empty($llmResult['request_failed']);
        $canSupport = $this->parseLlmCanSupport($llmResult);
        $confidence = floatval(isset($llmResult['confidence']) ? $llmResult['confidence'] : 0);
        $reason = isset($llmResult['reason']) ? $llmResult['reason'] : '';

        // LLM 通讯失败：写 status=RECORD_FAILED(3) + error_msg，抛异常由 MQ worker 重试
        if ($requestFailed) {
            $this->updateCheckResult($checkId, [
                'confidence' => $confidence,
                'reason'     => $reason,
                'status'     => self::RECORD_FAILED,
                'error_msg'  => $reason,
            ]);
            throw new \RuntimeException($reason !== '' ? $reason : 'LLM request failed');
        }

        $this->updateCheckResult($checkId, [
            'can_support' => $canSupport ? 1 : 0,
            'is_match'    => $canSupport ? 1 : 0,
            'confidence'  => $confidence,
            'reason'      => $reason,
            'status'      => self::RECORD_COMPLETED,
            'error_msg'   => '',
        ]);

        if ($confidence <= self::PASS_CONFIDENCE_THRESHOLD) {
            $this->runSecondPassBlocking($checkId, $row, $contentA, $refer, $contentB);
        }

        return [
            'check_id'     => $checkId,
            'can_support'  => $canSupport ? 1 : 0,
            'is_match'     => $canSupport ? 1 : 0,
            'confidence'   => $confidence,
            'reason'       => $reason,
        ];
    }

    /**
     * 低分结果的二轮 DOI 复核（同步阻塞执行；失败重试一次）
     */
    public function runSecondPassBlocking($checkId, array $row, $contentA, $refer, $referText)
    {
        $checkId = intval($checkId);
        if ($checkId <= 0) {
            return false;
        }

        $payload = $this->prepareRecheckPayload(is_array($refer) ? $refer : [], trim((string)$referText));
        if (empty($payload['has_abstract']) || trim((string)$payload['doi_block']) === '') {
            return false;
        }

        $lastError = '';
        for ($attempt = 0; $attempt < 2; $attempt++) {
            try {
                $llmResult = (new LLMService())->checkReference($contentA, trim((string)$referText), true, $payload['doi_block']);
                $requestFailed = !empty($llmResult['request_failed']);
                $canSupport = $this->parseLlmCanSupport($llmResult);
                $confidence = floatval(isset($llmResult['confidence']) ? $llmResult['confidence'] : 0);
                $tag = '[Crossref复核' . (trim((string)$payload['doi_used']) !== '' ? (' ' . trim((string)$payload['doi_used'])) : '') . ']';
                $reason = $tag . ' ' . (isset($llmResult['reason']) ? $llmResult['reason'] : '');

                if ($requestFailed) {
                    $lastError = isset($llmResult['reason']) ? (string)$llmResult['reason'] : 'LLM request failed';
                    if ($attempt < 1) {
                        continue;
                    }
                    $this->updateCheckResult($checkId, [
                        'confidence' => $confidence,
                        'reason'     => $reason,
                        'status'     => self::RECORD_FAILED,
                        'error_msg'  => $lastError,
                    ]);
                    $amId = intval(isset($row['am_id']) ? $row['am_id'] : 0);
                    if ($amId > 0) {
                        $this->syncAmRefCheckStatus($amId);
                    }
                    return false;
                }

                $this->updateCheckResult($checkId, [
                    'can_support' => $canSupport ? 1 : 0,
                    'is_match'    => $canSupport ? 1 : 0,
                    'confidence'  => $confidence,
                    'reason'      => $reason,
                    'status'      => self::RECORD_COMPLETED,
                    'error_msg'   => '',
                ]);
                $amId = intval(isset($row['am_id']) ? $row['am_id'] : 0);
                if ($amId > 0) {
                    $this->syncAmRefCheckStatus($amId);
                }
                return true;
            } catch (\Exception $e) {
                $lastError = $e->getMessage();
                if ($attempt < 1) {
                    continue;
                }
                $this->updateCheckResult($checkId, [
                    'status'    => self::RECORD_FAILED,
                    'error_msg' => $lastError,
                ]);
                $amId = intval(isset($row['am_id']) ? $row['am_id'] : 0);
                if ($amId > 0) {
                    $this->syncAmRefCheckStatus($amId);
                }
                return false;
            }
        }

        return false;
    }

    /**
     * @return array{refer: array, p_article_id: int, p_refer_id: int, reference_no: int}
     */
    private function resolveReferForRecheck($articleId, $pReferId, $referenceNo)
    {
        $prod = Db::name('production_article')
            ->where('article_id', $articleId)
            ->whereIn('state', [0, 2])
            ->find();
        if (empty($prod)) {
            throw new \RuntimeException('production_article not found for article_id=' . $articleId);
        }

        $pArticleId = intval($prod['p_article_id']);
        $refer = null;

        if ($pReferId > 0) {
            $refer = Db::name('production_article_refer')
                ->where('p_refer_id', $pReferId)
                ->where('p_article_id', $pArticleId)
                ->where('state', 0)
                ->find();
        } elseif ($referenceNo > 0) {
            $referMap = $this->loadReferMapByPArticleId($pArticleId);
            $referIndex = $referenceNo - 1;
            if (isset($referMap[$referIndex])) {
                $refer = $referMap[$referIndex];
                $pReferId = intval($refer['p_refer_id']);
            }
        } else {
            throw new \InvalidArgumentException('p_refer_id or reference_no is required');
        }

        if (empty($refer)) {
            throw new \RuntimeException('production_article_refer not found');
        }

        return [
            'refer'        => $refer,
            'p_article_id' => $pArticleId,
            'p_refer_id'   => intval($refer['p_refer_id']),
            'reference_no' => intval($refer['index']) + 1,
        ];
    }

    /**
     * 仅使用 refer_doi 字段（二次 Crossref 摘要用）
     */
    public function extractReferDoiOnly($refer)
    {
        if (!is_array($refer)) {
            return '';
        }
        $raw = trim((string)$this->arrGet($refer, 'refer_doi', ''));
        if ($raw === '' || stripos($raw, 'not available') !== false) {
            return '';
        }
        $dois = $this->extractDoisFromString($raw);
        return empty($dois) ? '' : $dois[0];
    }

    /**
     * 根据 refer_doi 调用 Crossref works API 获取摘要（二次校对专用）
     *
     * @return array{text:string, has_abstract:bool, doi:string}
     */
    public function fetchCrossrefAbstractByReferDoi($refer)
    {
        $doi = $this->extractReferDoiOnly($refer);
        if ($doi === '') {
            return ['text' => '', 'has_abstract' => false, 'doi' => ''];
        }

        $crossref = new CrossrefService([
            'mailto' => trim((string)Env::get('crossref_mailto', '')),
        ]);
        $block = $this->extractCrossrefBlock($doi, $crossref);
        if ($block === null) {
            return ['text' => '', 'has_abstract' => false, 'doi' => $doi];
        }

        return [
            'text'         => $block['text'],
            'has_abstract' => !empty($block['has_abstract']),
            'doi'          => $doi,
        ];
    }

    /**
     * 解析 LLM 返回的 can_support
     */
    public function parseLlmCanSupport($llmResult)
    {
        if (!is_array($llmResult)) {
            return false;
        }
        if (array_key_exists('can_support', $llmResult)) {
            return $this->parseLlmIsMatch($llmResult['can_support']);
        }
        return $this->parseLlmIsMatch(isset($llmResult['is_match']) ? $llmResult['is_match'] : false);
    }

    /**
     * 第一次校对：正文取 article_main.content；表格(type=2)取 article_main_table.table_data 等
     */
    public function resolveMainContentForJob(array $row, $maxChars = 8000)
    {
        $amId = intval($this->arrGet($row, 'am_id', 0));
        if ($amId <= 0) {
            return '';
        }
        $main = Db::name('article_main')
            ->field('content,type,amt_id,article_id')
            ->where('am_id', $amId)
            ->find();
        if (empty($main)) {
            return '';
        }

        $raw = trim($this->resolveArticleMainCheckContent($main));
        if ($raw === '') {
            return '';
        }

        return $this->normalizeCheckContentForLlm($raw, $maxChars);
    }

    /**
     * 是否为表格节：type=2、有 amt_id，或 content 为 &lt;table tableId='…'/&gt; 占位
     */
    private function isArticleMainTableSection(array $main)
    {
        if (intval($this->arrGet($main, 'type', self::MAIN_TYPE_TEXT)) === self::MAIN_TYPE_TABLE) {
            return true;
        }
        if (intval($this->arrGet($main, 'amt_id', 0)) > 0) {
            return true;
        }
        $content = (string)$this->arrGet($main, 'content', '');

        return stripos($content, '<table') !== false
            && preg_match('/tableId\s*=\s*[\'"]?\d+/i', $content);
    }

    /**
     * 从 article_main 或 content 占位解析 amt_id
     */
    private function resolveArticleMainTableAmtId(array $main)
    {
        $amtId = intval($this->arrGet($main, 'amt_id', 0));
        if ($amtId > 0) {
            return $amtId;
        }
        $content = (string)$this->arrGet($main, 'content', '');
        if (preg_match('/tableId\s*=\s*[\'"]?(\d+)/i', $content, $m)) {
            return intval($m[1]);
        }

        return 0;
    }

    /**
     * @return array|null
     */
    private function loadArticleMainTableRow(array $main)
    {
        $amtId = $this->resolveArticleMainTableAmtId($main);
        if ($amtId <= 0) {
            return null;
        }

        $q = Db::name('article_main_table')
            ->where('amt_id', $amtId)
            ->whereIn('state', [0, 2])
            ->field('table_data,title,note');
        $articleId = intval($this->arrGet($main, 'article_id', 0));
        if ($articleId > 0) {
            $q->where('article_id', $articleId);
        }
        $tbl = $q->find();

        return empty($tbl) ? null : $tbl;
    }

    /**
     * 按节提取引用：正文走 content；表格按行拼接单元格后扫描（Study 列仅 [n] 时也能带上同行上下文）
     */
    public function extractReferencesForArticleMain(array $main)
    {
        if (!$this->isArticleMainTableSection($main)) {
            return $this->extractReferences((string)$this->arrGet($main, 'content', ''));
        }

        $tbl = $this->loadArticleMainTableRow($main);
        if (empty($tbl)) {
            return [];
        }

        $extra = [];
        foreach (['title', 'note'] as $field) {
            $part = trim((string)$this->arrGet($tbl, $field, ''));
            if ($part !== '') {
                $extra[] = $part;
            }
        }

        return $this->extractReferencesFromTableDataJson(
            (string)$this->arrGet($tbl, 'table_data', ''),
            $extra
        );
    }

    /**
     * table_data 按行提取；$prefixChunks 为 title/note 等（在表格行之前扫描）
     */
    public function extractReferencesFromTableDataJson($tableDataJson, array $prefixChunks = [])
    {
        $result = [];
        $offset = 0;

        foreach ($prefixChunks as $chunk) {
            $chunk = trim((string)$chunk);
            if ($chunk === '') {
                continue;
            }
            foreach ($this->extractReferences($chunk) as $cite) {
                $cite['text_start'] = intval($cite['text_start']) + $offset;
                $cite['text_end'] = intval($cite['text_end']) + $offset;
                $cite['reference_start'] = intval($cite['reference_start']) + $offset;
                $cite['reference_end'] = intval($cite['reference_end']) + $offset;
                $result[] = $cite;
            }
            $offset += strlen($chunk) + 1;
        }

        $tableDataJson = trim((string)$tableDataJson);
        if ($tableDataJson === '') {
            return $result;
        }

        $decoded = $this->decodeTableDataJsonToArray($tableDataJson);
        if ($decoded === null) {
            foreach ($this->extractReferences($tableDataJson) as $cite) {
                $cite['text_start'] = intval($cite['text_start']) + $offset;
                $cite['text_end'] = intval($cite['text_end']) + $offset;
                $cite['reference_start'] = intval($cite['reference_start']) + $offset;
                $cite['reference_end'] = intval($cite['reference_end']) + $offset;
                $result[] = $cite;
            }

            return $result;
        }

        foreach ($decoded as $row) {
            $line = $this->buildTableRowCheckLine($row);
            if ($line === '') {
                continue;
            }
            foreach ($this->extractReferences($line) as $cite) {
                $cite['text_start'] = intval($cite['text_start']) + $offset;
                $cite['text_end'] = intval($cite['text_end']) + $offset;
                $cite['reference_start'] = intval($cite['reference_start']) + $offset;
                $cite['reference_end'] = intval($cite['reference_end']) + $offset;
                $result[] = $cite;
            }
            $offset += strlen($line) + 1;
        }

        return $result;
    }

    /**
     * 入队/LLM 用的原始 HTML：type=0 为 content；表格为 table_data 按行展平
     */
    public function resolveArticleMainCheckContent(array $main)
    {
        if (!$this->isArticleMainTableSection($main)) {
            return (string)$this->arrGet($main, 'content', '');
        }

        $tbl = $this->loadArticleMainTableRow($main);
        if (empty($tbl)) {
            return '';
        }

        $chunks = [];
        foreach (['title', 'note'] as $field) {
            $part = trim((string)$this->arrGet($tbl, $field, ''));
            if ($part !== '') {
                $chunks[] = $part;
            }
        }
        $flat = $this->flattenTableDataJsonToCheckContent((string)$this->arrGet($tbl, 'table_data', ''));
        if ($flat !== '') {
            $chunks[] = $flat;
        }

        return implode("\n", $chunks);
    }

    /**
     * 表格一行：各单元格 text 用 " | " 连接（保留同行化学名/部位/Study 列引用）
     */
    private function buildTableRowCheckLine($row)
    {
        if (!is_array($row)) {
            return '';
        }
        $cells = [];
        foreach ($row as $cell) {
            if (!is_array($cell)) {
                continue;
            }
            $text = trim((string)$this->arrGet($cell, 'text', ''));
            if ($text !== '') {
                $cells[] = $text;
            }
        }

        return implode(' | ', $cells);
    }

    /**
     * table_data 按行展平（供 LLM / 预览）；非法 JSON 时按整串处理
     */
    private function flattenTableDataJsonToCheckContent($tableDataJson)
    {
        $tableDataJson = trim((string)$tableDataJson);
        if ($tableDataJson === '') {
            return '';
        }
        $decoded = $this->decodeTableDataJsonToArray($tableDataJson);
        if ($decoded === null) {
            return $tableDataJson;
        }

        $lines = [];
        foreach ($decoded as $row) {
            $line = $this->buildTableRowCheckLine($row);
            if ($line !== '') {
                $lines[] = $line;
            }
        }

        return implode("\n", $lines);
    }

    /**
     * @return array|null
     */
    private function decodeTableDataJsonToArray($raw)
    {
        $raw = trim((string)$raw);
        if ($raw === '') {
            return null;
        }
        if (preg_match('/^\xEF\xBB\xBF/', $raw)) {
            $raw = substr($raw, 3);
        }
        $decoded = json_decode($raw, true);
        if (json_last_error() !== JSON_ERROR_NONE) {
            return null;
        }
        if (is_array($decoded)) {
            return $decoded;
        }
        if (is_string($decoded)) {
            $decoded2 = json_decode($decoded, true);
            if (json_last_error() === JSON_ERROR_NONE && is_array($decoded2)) {
                return $decoded2;
            }
        }

        return null;
    }

    private function normalizeCheckContentForLlm($raw, $maxChars = 8000)
    {
        $text = $this->pregReplaceBlueTags($raw, '[$1]');
        $text = strip_tags($text);
        $text = html_entity_decode($text, ENT_QUOTES | ENT_HTML5, 'UTF-8');
        $text = preg_replace('/\s+/u', ' ', $text);
        $text = trim($text);
        if ($text === '') {
            return '';
        }

        $maxChars = max(500, intval($maxChars));
        if (mb_strlen($text) > $maxChars) {
            $text = mb_substr($text, 0, $maxChars) . '...';
        }

        return $text;
    }

    /**
     * 引用处局部上下文（origin_text），供其它场景使用
     */
    public function resolveCitationContextForJob(array $row)
    {
        $text = trim((string)$this->arrGet($row, 'origin_text', ''));
        if ($text === '') {
            $text = trim((string)$this->arrGet($row, 'content_a', ''));
        }
        return $text;
    }

    /**
     * 从 refer 行提取标准 DOI（10.xxxx/...）
     *
     * 优先级：refer_content（原始引用文本里的 DOI 最贴近实际被引用的文献）
     *        > refer_doi > doi > doilink
     */
    public function extractDoiFromRefer($refer)
    {
        $list = $this->extractAllDoiCandidatesFromRefer($refer);
        return empty($list) ? '' : $list[0];
    }

    /**
     * 返回 refer 行可能对应的全部 DOI 候选（去重，按优先级排序）
     *
     * 用于第二轮 DOI 复核场景：当 metadata 的 refer_doi 与原始引用文本里的 DOI
     * 不一致时（数据漂移），优先尝试原始引用文本里的 DOI 抓真实摘要。
     *
     * @return string[]
     */
    public function extractAllDoiCandidatesFromRefer($refer)
    {
        if (!is_array($refer)) {
            return [];
        }
        $ordered = [
            (string)$this->arrGet($refer, 'refer_content', ''),
            (string)$this->arrGet($refer, 'refer_doi', ''),
            (string)$this->arrGet($refer, 'doi', ''),
            (string)$this->arrGet($refer, 'doilink', ''),
        ];

        $result = [];
        foreach ($ordered as $raw) {
            foreach ($this->extractDoisFromString($raw) as $doi) {
                if (!in_array($doi, $result, true)) {
                    $result[] = $doi;
                }
            }
        }
        return $result;
    }

    /**
     * 从任意文本里抽取所有形如 10.xxxx/yyy 的 DOI
     * @return string[]
     */
    private function extractDoisFromString($text)
    {
        $text = trim((string)$text);
        if ($text === '' || stripos($text, 'not available') !== false) {
            return [];
        }

        $dois = [];

        if (preg_match_all('~doi\.org/([^\s?#"\'<>]+)~i', $text, $m)) {
            foreach ($m[1] as $cand) {
                $cand = $this->trimDoiTail(trim($cand));
                if ($this->isValidDoi($cand)) {
                    $dois[] = $cand;
                }
            }
        }

        if (preg_match_all('~\b(10\.\d{3,9}/[^\s?#"\'<>]+)~i', $text, $m)) {
            foreach ($m[1] as $cand) {
                $cand = $this->trimDoiTail(trim($cand));
                if ($this->isValidDoi($cand)) {
                    $dois[] = $cand;
                }
            }
        }

        if ($dois === [] && strpos($text, '10.') === 0) {
            $cand = $this->trimDoiTail($text);
            if ($this->isValidDoi($cand)) {
                $dois[] = $cand;
            }
        }

        return array_values(array_unique($dois));
    }

    private function trimDoiTail($doi)
    {
        return rtrim($doi, ".,;:)]}>\"'\\ \t\n\r");
    }

    private function isValidDoi($doi)
    {
        return (bool)preg_match('~^10\.\d{3,9}/[^\s]+$~i', (string)$doi);
    }

    /**
     * 通过 PubMed / Crossref 拉取 DOI 对应文献内容（本地 LLM 无法打开网页，须预先抓取）
     *
     * 行为：
     * - 尝试 refer 行内所有 DOI 候选（refer_content > refer_doi > doi > doilink）
     * - 优先采用第一个能拿到 abstract 的 DOI
     * - PubMed 无摘要时回落到 Crossref raw 解析摘要（清理 JATS 标签）
     * - 全部失败则返回空字符串（调用方据此跳过二次复核）
     */
    public function fetchDoiLiteratureBlock($refer)
    {
        $candidates = $this->extractAllDoiCandidatesFromRefer($refer);
        if (empty($candidates)) {
            return '';
        }

        $pubmed = new PubmedService([
            'email' => trim((string)Env::get('pubmed_email', '')),
            'tool'  => trim((string)Env::get('pubmed_tool', 'tmrjournals')),
        ]);
        $crossref = new CrossrefService([
            'mailto' => trim((string)Env::get('crossref_mailto', '')),
        ]);

        $best = null;
        $fallback = null;

        foreach ($candidates as $doi) {
            $block = $this->buildDoiBlockFromSources($doi, $pubmed, $crossref);
            if ($block === null) {
                continue;
            }
            if (!empty($block['has_abstract'])) {
                $best = $block;
                break;
            }
            if ($fallback === null) {
                $fallback = $block;
            }
        }

        $chosen = $best ?: $fallback;
        if ($chosen === null) {
            return '';
        }
        return $chosen['text'];
    }

    /**
     * 拉单个 DOI 的真实内容，返回 ['text' => string, 'has_abstract' => bool] 或 null
     */
    private function buildDoiBlockFromSources($doi, PubmedService $pubmed, CrossrefService $crossref)
    {
        $doi = trim((string)$doi);
        if ($doi === '') {
            return null;
        }

        $pub = $pubmed->fetchByDoi($doi);
        $pubAbstract = is_array($pub) ? trim((string)$this->arrGet($pub, 'abstract', '')) : '';

        if (is_array($pub) && ($pubAbstract !== '' || trim((string)$this->arrGet($pub, 'title', '')) !== '')) {
            $lines = ['Source: PubMed (DOI ' . $doi . ')'];
            if (!empty($pub['title'])) {
                $lines[] = 'Actual Title: ' . trim((string)$pub['title']);
            }
            if (!empty($pub['journal'])) {
                $lines[] = 'Journal: ' . trim((string)$pub['journal']);
            }
            if (!empty($pub['year'])) {
                $lines[] = 'Year: ' . trim((string)$pub['year']);
            }
            if (!empty($pub['publication_types'])) {
                $lines[] = 'Publication Types: ' . implode('; ', (array)$pub['publication_types']);
            }
            if (!empty($pub['mesh_terms'])) {
                $lines[] = 'MeSH: ' . implode('; ', (array)$pub['mesh_terms']);
            }
            if ($pubAbstract !== '') {
                $lines[] = 'Abstract: ' . $this->truncate($pubAbstract, 3500);
            }

            if ($pubAbstract === '') {
                $cr = $this->extractCrossrefBlock($doi, $crossref);
                if ($cr !== null && $cr['has_abstract']) {
                    $lines[] = "\n--- Crossref 补充 ---\n" . $cr['text'];
                    return ['text' => implode("\n", $lines), 'has_abstract' => true];
                }
            }

            return ['text' => implode("\n", $lines), 'has_abstract' => $pubAbstract !== ''];
        }

        return $this->extractCrossrefBlock($doi, $crossref);
    }

    /**
     * 从 Crossref 拉取标题/期刊/作者/摘要（abstract 通常包裹 JATS XML，需清洗）
     * @return array|null ['text' => string, 'has_abstract' => bool]
     */
    private function extractCrossrefBlock($doi, CrossrefService $crossref)
    {
        $msg = $crossref->fetchWork($doi);
        if (!is_array($msg)) {
            return null;
        }

        $summary = $crossref->fetchWorkSummary($doi);
        if (!is_array($summary)) {
            $summary = [];
        }

        $lines = ['Source: Crossref api.crossref.org/works/' . rawurlencode($doi)];
        $title = isset($msg['title'][0]) ? trim((string)$msg['title'][0]) : trim((string)$this->arrGet($summary, 'title', ''));
        if ($title !== '') {
            $lines[] = 'Actual Title: ' . $title;
        }
        if (!empty($summary['joura'])) {
            $lines[] = 'Journal: ' . trim((string)$summary['joura']);
        }
        if (!empty($summary['author_str'])) {
            $lines[] = 'Authors: ' . trim((string)$summary['author_str']);
        }
        if (!empty($summary['dateno'])) {
            $lines[] = 'Publication: ' . trim((string)$summary['dateno']);
        }
        if (!empty($summary['doilink'])) {
            $lines[] = 'DOI Link: ' . trim((string)$summary['doilink']);
        }
        if (!empty($summary['is_retracted'])) {
            $lines[] = 'Retraction: yes - ' . trim((string)$this->arrGet($summary, 'retract_reason', ''));
        }

        $abstract = $this->cleanCrossrefAbstract((string)$this->arrGet($msg, 'abstract', ''));
        $hasAbstract = $abstract !== '';
        if ($hasAbstract) {
            $lines[] = 'Abstract: ' . $this->truncate($abstract, 3500);
        } else {
            $lines[] = 'Note: Crossref 未返回摘要，请结合标题/期刊/作者与正文谨慎判断。';
        }

        return ['text' => implode("\n", $lines), 'has_abstract' => $hasAbstract];
    }

    private function cleanCrossrefAbstract($raw)
    {
        $raw = trim((string)$raw);
        if ($raw === '') {
            return '';
        }
        $raw = preg_replace('~<jats:title[^>]*>.*?</jats:title>~is', '', $raw);
        $raw = preg_replace('~<jats:p[^>]*>~i', "\n", $raw);
        $raw = preg_replace('~</jats:p>~i', '', $raw);
        $raw = preg_replace('~</?jats:[^>]+>~i', '', $raw);
        $raw = strip_tags($raw);
        $raw = preg_replace('/[ \t]+/u', ' ', $raw);
        $raw = preg_replace("/\r\n|\r/u", "\n", $raw);
        $raw = preg_replace("/\n{2,}/u", "\n", $raw);
        return trim($raw);
    }

    private function truncate($text, $max)
    {
        $text = (string)$text;
        if (mb_strlen($text) <= $max) {
            return $text;
        }
        return mb_substr($text, 0, $max) . '...';
    }

    /**
     * 第二次 DOI 复核数据准备：返回书目信息 + 真实抓取内容
     *
     * @return array{refer_text:string, doi_block:string, has_abstract:bool, doi_used:string}
     */
    public function prepareRecheckPayload($refer, $referText = '')
    {
        $base = trim($referText) !== '' ? trim($referText) : $this->formatReferForLlm($refer);
        $cr = $this->fetchCrossrefAbstractByReferDoi($refer);
        return [
            'refer_text'   => $base,
            'doi_block'    => $cr['text'],
            'has_abstract' => $cr['has_abstract'],
            'doi_used'     => $cr['doi'],
        ];
    }

    /**
     * 旧接口：拼接成单块文本（向后兼容，建议调用方改用 prepareRecheckPayload）
     */
    public function formatReferForDoiRecheck($refer, $referText = '')
    {
        $payload = $this->prepareRecheckPayload($refer, $referText);
        if ($payload['doi_block'] === '') {
            return $payload['refer_text']
                . "\n\n【DOI 文献真实内容】\n未能从 PubMed/Crossref 获取该 DOI 的摘要或元数据，请依据书目条目与正文谨慎判断。";
        }
        return $payload['refer_text']
            . "\n\n【Crossref 摘要（依据 Refer_doi 从 api.crossref.org/works 获取）】\n"
            . $payload['doi_block'];
    }

    /**
     * 对已完成且低分的记录尝试同步 Crossref 二轮（供 enqueueSecondPassByArticle 等手工入口）
     */
    public function runSecondPassIfNeeded($checkId, $confidence)
    {
        $checkId = intval($checkId);
        $confidence = floatval($confidence);
        if ($checkId <= 0 || $confidence > self::PASS_CONFIDENCE_THRESHOLD) {
            return false;
        }

        $row = Db::name('article_reference_check_result')->where('id', $checkId)->find();
        if (empty($row)) {
            return false;
        }

        $refer = null;
        if (intval($row['p_refer_id']) > 0) {
            $refer = Db::name('production_article_refer')
                ->where('p_refer_id', intval($row['p_refer_id']))
                ->where('state', 0)
                ->find();
        }
        if (empty($refer) || $this->extractReferDoiOnly($refer) === '') {
            return false;
        }

        $cr = $this->fetchCrossrefAbstractByReferDoi($refer);
        if (empty($cr['has_abstract'])) {
            return false;
        }

        $contentA = $this->resolveMainContentForJob($row);
        $referText = trim((string)$this->arrGet($row, 'refer_text', ''));
        if ($referText === '' && is_array($refer)) {
            $referText = $this->formatReferForLlm($refer);
        }

        return $this->runSecondPassBlocking($checkId, $row, $contentA, $refer, $referText);
    }

    /**
     * 从正文 HTML 或表格展平后的 HTML 提取 blue 引用
     */
    public function extractReferences($content)
    {
        $result = [];
        $matches = $this->collectBlueTagMatches($content);
        if (empty($matches[0])) {
            return [];
        }

        $tagSpans = [];
        foreach ($matches[0] as $index => $match) {
            $tagSpans[] = [
                'start' => $match[1],
                'end'   => $match[1] + strlen($match[0]),
                'index' => $index,
            ];
        }

        foreach ($matches[0] as $index => $match) {
            $fullTag = $match[0];
            $tagStart = $match[1];
            $tagEnd = $tagStart + strlen($fullTag);
            $rawRef = trim($matches[1][$index][0]);
            $referenceNumbers = $this->expandReferenceNumbers($rawRef);

            list($localStart, $localEnd, $originalText) = $this->extractLocalCitationContext(
                $content,
                $tagStart,
                $tagEnd,
                $tagSpans
            );

            if (!$this->isMeaningfulCitationContext($originalText) || empty($referenceNumbers)) {
                continue;
            }

            $result[] = [
                'reference_raw'       => $rawRef,
                'reference_numbers'   => $referenceNumbers,
                'original_text'       => $originalText,
                'reference_start'     => $tagStart,
                'reference_end'       => $tagEnd,
                'text_start'          => $localStart,
                'text_end'            => $localEnd,
            ];
        }

        return $result;
    }

    /**
     * 按引用位置截取局部上下文：优先取标签前叙述；同句多引时后续引用从上一标签后开始。
     */
    private function extractLocalCitationContext($content, $tagStart, $tagEnd, array $tagSpans)
    {
        $paragraphStart = $this->findParagraphStart($content, $tagStart);
        $sentenceEnd = $this->findSentenceEnd($content, $tagEnd, $tagEnd);

        $prevTagEnd = $paragraphStart;
        $nextTagStart = $sentenceEnd;
        foreach ($tagSpans as $span) {
            if ($span['end'] <= $tagStart && $span['end'] > $prevTagEnd) {
                $prevTagEnd = $span['end'];
            }
            if ($span['start'] > $tagEnd && $span['start'] < $nextTagStart) {
                $nextTagStart = $span['start'];
            }
        }

        $hasPriorCiteInParagraph = ($prevTagEnd > $paragraphStart);
        $sentenceStart = $this->findSentenceStart($content, $tagStart);

        // 段内首个引用：整段到标签前；后续引用：取「本句」起点（可早于上一标签），避免只剩 “and external environment” 再误用标签后文本
        if ($hasPriorCiteInParagraph) {
            $localStart = max($paragraphStart, $sentenceStart);
        } else {
            $localStart = $this->capContextStartBeforeTag($content, $tagStart, $paragraphStart);
        }

        // 默认：引用标签前的论述
        $localEnd = $tagStart;
        $originalText = $this->buildCitationContextText($content, $localStart, $localEnd);

        // 仅段内首个引用、且标签前极短（如句末 ICU nurses [14]）时，才改用标签后片段；同段多引禁止标签后截取（会错取下一句）
        $allowTrailing = !$hasPriorCiteInParagraph;
        if ($allowTrailing && (
            !$this->isMeaningfulCitationContext($originalText)
            || $this->shouldUseTrailingCitationContext($content, $localStart, $tagStart, $tagEnd)
        )) {
            $trailEnd = ($nextTagStart < $sentenceEnd) ? $nextTagStart : $sentenceEnd;
            $trailText = $this->buildCitationContextText($content, $tagEnd, $trailEnd);
            if ($this->isMeaningfulCitationContext($trailText)) {
                $localStart = $tagEnd;
                $localEnd = $trailEnd;
                $originalText = $trailText;
            }
        }

        if (!$this->isMeaningfulCitationContext($originalText)) {
            list($localStart, $localEnd) = $this->widenCitationContextBounds(
                $content,
                $tagStart,
                $tagEnd,
                $localStart,
                $localEnd
            );
            $originalText = $this->buildCitationContextText($content, $localStart, $localEnd);
        }

        return [$localStart, $localEnd, $originalText];
    }

    /**
     * 标签前仅有作者缩写等极短片段时，改用标签后上下文
     */
    private function shouldUseTrailingCitationContext($content, $localStart, $tagStart, $tagEnd)
    {
        $before = $this->buildCitationContextText($content, $localStart, $tagStart);
        if (!$this->isMeaningfulCitationContext($before)) {
            return true;
        }

        return mb_strlen($before) < 25;
    }

    public function expandReferenceNumbers($refStr)
    {
        $refStr = str_replace(
            ['，', '–', '—', '−', '‐', '‑'],
            [',', '-', '-', '-', '-', '-'],
            trim($refStr)
        );
        $numbers = [];
        foreach (explode(',', $refStr) as $part) {
            $part = trim($part);
            if ($part === '') {
                continue;
            }
            if (preg_match('/^(\d+)\s*-\s*(\d+)$/', $part, $m)) {
                $start = intval($m[1]);
                $end = intval($m[2]);
                if ($start <= $end) {
                    $numbers = array_merge($numbers, range($start, $end));
                }
            } elseif (ctype_digit($part)) {
                $numbers[] = intval($part);
            }
        }
        return array_values(array_unique($numbers));
    }

    /**
     * 返回 $bytePos 处 UTF-8 码点占用的最后一字节之后的位置（下一字符起始）
     */
    private function utf8CharEnd($content, $bytePos)
    {
        $len = strlen($content);
        if ($bytePos < 0 || $bytePos >= $len) {
            return max(0, min($len, $bytePos + 1));
        }
        $next = $bytePos + 1;
        while ($next < $len && (ord($content[$next]) & 0xC0) === 0x80) {
            $next++;
        }

        return $next;
    }

    /**
     * 按字节偏移截取（与 strpos/strlen 一致）；勿用 mb_substr，否则遇中文前缀会截断英文词头
     */
    private function byteSubstr($content, $start, $end)
    {
        $length = max(0, $end - $start);
        if ($length === 0) {
            return '';
        }

        return (string)mb_strcut($content, $start, $length, 'UTF-8');
    }

    private function buildCitationContextText($content, $start, $end)
    {
        $text = $this->byteSubstr($content, $start, $end);
        $text = $this->pregReplaceBlueTags($text, '');
        $text = trim(strip_tags($text));
        $text = preg_replace('/\s+/u', ' ', $text);
        $text = ltrim($text, "\xEF\xBB\xBF");

        return $text;
    }

    /**
     * 过滤仅标点、过短或无字母/汉字的上下文（如去掉标签后只剩 "."）
     */
    private function isMeaningfulCitationContext($text)
    {
        $text = trim($text);
        if ($text === '') {
            return false;
        }
        if ($this->isOnlyPunctuationOrSpace($text)) {
            return false;
        }
        if (!preg_match('/[\p{L}\p{N}]/u', $text)) {
            return false;
        }

        return mb_strlen($text) >= 2;
    }

    private function isOnlyPunctuationOrSpace($text)
    {
        return preg_match('/^[\s\p{P}\p{S}]+$/u', $text) === 1;
    }

    /**
     * 首句过短时向前后各扩展一句（上限约 2000 字符）
     */
    private function widenCitationContextBounds($content, $tagStart, $tagEnd, $start, $end)
    {
        $len = strlen($content);
        $maxSpan = 2000;

        if ($start > 0) {
            $prevStart = $this->findSentenceStart($content, max(0, $start - 1));
            if ($prevStart < $start) {
                $start = $prevStart;
            }
        }

        $nextEnd = $this->findSentenceEnd($content, $end, $tagEnd);
        if ($nextEnd > $end && $nextEnd <= $len) {
            $end = $nextEnd;
        }

        if ($end - $start > $maxSpan) {
            $half = (int)floor($maxSpan / 2);
            $mid = (int)floor(($tagStart + $tagEnd) / 2);
            $start = max(0, $mid - $half);
            $end = min($len, $start + $maxSpan);
        }

        return [$start, $end];
    }

    /**
     * 句号是否可作为句界（排除小数点、et al. 等缩写）
     */
    private function isSentenceDelimiterAt($content, $pos, $delimiter)
    {
        $len = strlen($content);
        if ($delimiter !== '.' || $pos < 0 || $pos >= $len) {
            return true;
        }
        if ($pos > 0 && $pos + 1 < $len
            && ctype_digit($content[$pos - 1])
            && ctype_digit($content[$pos + 1])
        ) {
            return false;
        }

        $before = substr($content, max(0, $pos - 12), min(12, $pos));
        if (preg_match('/\b(et\s+al|e\.g|i\.e|vs|etc|fig|no)\s*\.?\s*$/i', $before)) {
            return false;
        }

        $after = substr($content, $pos + 1, 24);
        if (preg_match('/^\s*<blue>\s*\[/', $after)) {
            return false;
        }

        return true;
    }

    /**
     * 段落起始（HTML / 换行），避免英文多句段落只取到最后一个句号后的一句
     */
    private function findParagraphStart($content, $tagStart)
    {
        $search = substr($content, 0, max(0, $tagStart));
        if ($search === '') {
            return 0;
        }

        $best = 0;

        if (preg_match_all('/<p[^>]*>/i', $search, $m, PREG_OFFSET_CAPTURE)) {
            $last = end($m[0]);
            $best = max($best, $last[1] + strlen($last[0]));
        }
        if (preg_match_all('/<\/p>\s*/i', $search, $m, PREG_OFFSET_CAPTURE)) {
            $last = end($m[0]);
            $best = max($best, $last[1] + strlen($last[0]));
        }
        if (preg_match_all('/<br\s*\/?>\s*/i', $search, $m, PREG_OFFSET_CAPTURE)) {
            $last = end($m[0]);
            $best = max($best, $last[1] + strlen($last[0]));
        }

        $pos = strrpos($search, "\n\n");
        if ($pos !== false) {
            $best = max($best, $pos + 2);
        }
        $pos = strrpos($search, "\n");
        if ($pos !== false) {
            $best = max($best, $pos + 1);
        }

        return $best;
    }

    /**
     * 段落过长时从引用处向前截取上限，避免单次 LLM 上下文过大
     */
    private function capContextStartBeforeTag($content, $tagStart, $paragraphStart, $maxBytes = 2500)
    {
        if ($tagStart - $paragraphStart <= $maxBytes) {
            return $paragraphStart;
        }

        $start = $tagStart - $maxBytes;
        $slice = substr($content, $start, $tagStart - $start);
        if (preg_match('/[.!?。！？]\s+/u', $slice, $m, PREG_OFFSET_CAPTURE)) {
            $rel = $m[0][1] + strlen($m[0][0]);
            return $start + $rel;
        }

        return max($paragraphStart, $start);
    }

    private function findSentenceStart($content, $position)
    {
        $start = 0;
        foreach (['.', '。', '!', '?', "\n"] as $delimiter) {
            $pos = strrpos(substr($content, 0, $position), $delimiter);
            if ($pos !== false && $this->isSentenceDelimiterAt($content, $pos, $delimiter)) {
                $start = max($start, $this->utf8CharEnd($content, $pos));
            }
        }
        return $start;
    }

    /**
     * @param int $searchFrom  从该字节位置起查找句末
     * @param int $tagEnd      引用标签结束位置；用于跳过 </blue> 后紧跟的孤立句号
     */
    private function findSentenceEnd($content, $searchFrom, $tagEnd = 0)
    {
        $length = strlen($content);
        $minPos = max(0, $searchFrom);

        while ($minPos < $length) {
            $endPositions = [];
            foreach (['.', '。', '!', '?', "\n"] as $delimiter) {
                $pos = strpos($content, $delimiter, $minPos);
                if ($pos !== false && $this->isSentenceDelimiterAt($content, $pos, $delimiter)) {
                    $endPositions[] = $this->utf8CharEnd($content, $pos);
                }
            }
            if (empty($endPositions)) {
                return $length;
            }

            $end = min($endPositions);
            if ($tagEnd <= 0 || $end <= $tagEnd) {
                return $end;
            }

            $gap = substr($content, $tagEnd, $end - $tagEnd);
            $gapText = trim(strip_tags($this->pregReplaceBlueTags($gap, '')));
            if ($gapText !== '' && !$this->isOnlyPunctuationOrSpace($gapText)) {
                return $end;
            }

            $minPos = $end;
        }

        return $length;
    }

    /**
     * 批量记录已入库后创建文章批次并投递 RabbitMQ
     *
     * @param array  $rows 元素含 check_id
     * @param int    $pArticleId
     * @param string $trigger enqueue|recheck_failed|manual
     * @return int[] check_id 列表
     */
    private function enqueueChecksSortedByReferenceNo(array $rows, $pArticleId = 0, $trigger = 'enqueue')
    {
        $checkIds = [];
        foreach ($rows as $row) {
            $checkId = intval($row['check_id']);
            if ($checkId > 0) {
                $checkIds[] = $checkId;
            }
        }
        if (!empty($checkIds)) {
            $this->startArticleCheckQueue($checkIds, intval($pArticleId), $trigger);
        }
        return $checkIds;
    }

    /**
     * 创建文章批次；队首批次立即发 MQ，其余批次等待前序完成
     *
     * @param int[]  $checkIds
     * @param int    $pArticleId
     * @param string $trigger
     * @return int[]
     */
    public function startArticleCheckQueue(array $checkIds, $pArticleId = 0, $trigger = 'enqueue')
    {
        $checkIds = array_values(array_filter(array_map('intval', $checkIds)));
        if (empty($checkIds)) {
            return [];
        }

        $pArticleId = intval($pArticleId);
        if ($pArticleId <= 0) {
            $firstRow = Db::name('article_reference_check_result')->where('id', $checkIds[0])->find();
            $pArticleId = empty($firstRow) ? 0 : intval($this->arrGet($firstRow, 'p_article_id', 0));
        }
        if ($pArticleId <= 0) {
            throw new \RuntimeException('p_article_id is required for reference check queue');
        }

        $now = date('Y-m-d H:i:s');
        $batchId = Db::name('article_reference_check_batch')->insertGetId([
            'p_article_id' => $pArticleId,
            'batch_status' => 0,
            'total_count'  => count($checkIds),
            'done_count'   => 0,
            'failed_count' => 0,
            'trigger'      => (string)$trigger,
            'created_at'   => $now,
            'updated_at'   => $now,
        ]);

        $shouldPublish = !$this->hasEarlierWaitingBatch($batchId) && !$this->hasRunningReferenceCheckBatch();
        if ($shouldPublish) {
            (new ReferenceCheckMqPublisher())->publishArticleStart($pArticleId, intval($batchId), $trigger);
            $this->log('startArticleCheckQueue publish p_article_id=' . $pArticleId . ' batch_id=' . $batchId);
        } else {
            $this->log('startArticleCheckQueue queued batch_id=' . $batchId . ' p_article_id=' . $pArticleId);
        }

        return $checkIds;
    }

    private function hasRunningReferenceCheckBatch()
    {
        return Db::name('article_reference_check_batch')
            ->where('batch_status', 1)
            ->count() > 0;
    }

    private function hasEarlierWaitingBatch($batchId)
    {
        return Db::name('article_reference_check_batch')
            ->where('batch_status', 0)
            ->where('id', '<', intval($batchId))
            ->count() > 0;
    }

    public function log($msg)
    {
        $line = date('Y-m-d H:i:s') . ' ' . $msg . PHP_EOL;
        @file_put_contents($this->logFile, $line, FILE_APPEND);
    }
}