<?php

namespace app\api\controller;

use app\api\controller\Base;
use think\Db;
use app\common\OpenAi;
use app\common\Article;
/**
 * @title 文章校对记录
 * @description 对接OPENAI接口
 */
class Proofread extends Base
{

    /**
     * @title AI文章校对
     * @param article_id 文章ID
     */
    public function proofRead($aParam = []){
        //获取参数
        $aParam = empty($aParam) ? $this->request->post() : $aParam;
        $iArticleId = empty($aParam['article_id']) ? '' : $aParam['article_id'];
        if(empty($iArticleId)){
            return json_encode(array('status' => 2,'msg' => 'Please select an article' ));
        }
        //行号
        $iAmId = empty($aParam['am_id']) ? 0 : $aParam['am_id'];
        //查询文章
        $aWhere = ['article_id' => $iArticleId];
        $oArticle = new Article;
        $aArticle = json_decode($oArticle->get($aWhere),true);
        $aArticle = empty($aArticle['data']) ? [] : $aArticle['data'];
        if(empty($aArticle)){
            return json_encode(array('status' => 3,'msg' => 'No articles requiring review were found' ));
        }
        if($aArticle['state'] != 6){
            return json_encode(array('status' => 4,'msg' => 'The article has not entered the proofreading stage'));
        }

        //查询是否进行过校对
        $aProofReadWhere = ['article_id' => $iArticleId,'state' => 2];
        if(!empty($iAmId)){
            $aProofReadWhere['am_id'] = $iAmId;
        }
        $iCount = Db::name('article_proofread')->where($aProofReadWhere)->count();
        if(!empty($iCount)){
            return json_encode(array('status' => 5,'msg' => 'The article or paragraph has been proofread'));
        }

        //查询文章内容
        $aWhere['type'] = 0;
        $aWhere['content'] = ['<>',''];
        $aWhere['state'] = 0;
        if(!empty($iAmId)){
            $aWhere['am_id'] = $iAmId;
        }
        $aArticleMain = Db::table('t_article_main')->field('am_id,content,type,is_h1,is_h2,is_h3,ami_id,amt_id')->where($aWhere)->select(); 
        if(empty($aArticleMain)){
            return json_encode(array('status' => 5,'msg' => 'The content of the article is empty'));
        }

        //实例化公共方法
        $oHelperFunction = new \app\common\HelperFunction;
        $oProofReadService = new \app\common\ProofReadService;
        //数据处理
        $aH = $aTable = [];
        foreach ($aArticleMain as $key => $value) {
            if(empty($oHelperFunction->filterAllTags($value['content']))){
                continue;
            }
            $aResult = $oProofReadService->proofread($value['content']);
            if(empty($aResult)){
                continue;
            }
            $aResult['am_id'] = $value['am_id'];
            $aError[] = $aResult;
        }
        if(empty($aError)){
            return json_encode(array('status' => 1,'msg' => 'No errors found'));
        }
        //数据处理
        foreach ($aError as $key => $value) {
            if(empty($value['errors'])){
                continue;
            }
            foreach ($value['errors'] as $k => $val) {
                $val['am_id'] = $value['am_id'];
                $val['article_id'] = $iArticleId;
                $val['proof_before'] = empty($value['proof_before']) ? '' : $value['proof_before'];
                $val['proof_after'] = empty($value['proof_after']) ? '' : $value['proof_after'];
                $aData[] = $val;
            }
        }
        if(empty($aData)){
            return json_encode(array('status' => 1,'msg' => 'Data processing failed'));
        }
        //插入
        $result = Db::name('article_proofread')->insertAll($aData);
        if(!$result){
            return json_encode(array('status' => 6,'msg' => 'No errors found'));
        }

        //查询参考文献
        $aWhere = ['state' => ['in',[0,2]],'article_id' => $iArticleId];
        return json_encode(['status' => 1,'msg' => 'success']);
    }
    /**
     * @title 获取每行校对记录
     * @param article_id 文章ID
     * @param am_id 行号
     * @param state 状态1已执行2未执行3删除
     */
    public function get($aParam = []){

        //获取参数
        $aParam = empty($aParam) ? $this->request->post() : $aParam;
        //参数验证-文章ID
        $iArticleId = empty($aParam['article_id']) ? 0 : $aParam['article_id'];
        if(empty($iArticleId)){
            return json_encode(['status' => 2,'msg' => 'Please select a article']);
        }
        //行号
        $iAmId = empty($aParam['am_id']) ? 0 : $aParam['am_id'];

        //查询文章
        $aWhere = ['article_id' => $iArticleId];
        $aArticle = Db::name('article')->field('journal_id,state')->where($aWhere)->find();
        if(empty($aArticle)){
            return json_encode(['status' => 3,'msg' => 'The query article does not exist']);
        }
        if($aArticle['state'] < 5 || $aArticle['state'] == 8){
            return json_encode(array('status' => 4,'msg' => 'The article has not entered the proofreading stage'));
        }
        
        //查询文章内容
        $aWhere['type'] = 0;
        $aWhere['content'] = ['<>',''];
        $aWhere['state'] = 0;
        if(!empty($iAmId)){
            $aWhere['am_id'] = $iAmId;
        }
        $aArticleMain = Db::name('article_main')->field('am_id,content')->where($aWhere)->select(); 
        if(empty($aArticleMain)){
            return json_encode(array('status' => 5,'msg' => 'The content of the article is empty'));
        }

        //查询校对内容
        $aAmId = array_column($aArticleMain, 'am_id');
        $aWhere = ['am_id' => ['in',$aAmId]];
        $iState = empty($aParam['state']) ? 0 : $aParam['state'];
        if(!empty($iState)){
            $aWhere['state'] = ['in',$iState];
        }
        $aProofRead = Db::name('article_proofread')->field('id,am_id,verbatim_texts,revised_content,explanation,state')->where($aWhere)->select(); 
        if(empty($aProofRead)){
            return json_encode(array('status' => 1,'msg' => 'Proofreading record is empty'));
        }
        //数据处理
        $aData = [];
        $aArticleMain = array_column($aArticleMain, 'content','am_id');
        foreach ($aProofRead as $key => $value) {
            $aData[$value['am_id']][] = $value;
        }

        // 存储每个文章的最新处理内容
        // 样式定义：标红+下划线
        // 定义标红+下划线样式
        // $style = 'color: red; text-decoration: underline;';

        // // 存储最终处理后的文章内容
        // $aFinalContent = [];

        // // 外层循环：遍历每个文章的错误分组（$key为am_id）
        // foreach ($aData as $amId => $errors) {
        //     // 获取原始文章内容（若不存在则跳过）
        //     $sContent = empty($aArticleMain[$amId]) ? '' : $aArticleMain[$amId];
        //     if (empty($sContent)) {
        //         continue;
        //     }
            
        //     // 初始化当前内容为原始内容，后续替换将基于此更新
        //     $currentContent = $sContent;
            
        //     // 内层循环：处理当前文章的每条错误记录
        //     foreach ($errors as $val) {
        //         // 只处理状态为2的错误
        //         if ($val['state'] != 2) {
        //             continue;
        //         }
                
        //         // 获取错误内容（待标红的文本）
        //         $verbatim_texts = trim($val['verbatim_texts'] ?? '');
        //         if (empty($verbatim_texts)) {
        //             continue; // 空错误内容跳过
        //         }
                
        //         // 构建带样式的替换内容（用span标签包裹，添加CSS样式）
        //         $revised_content = '<span style="' . $style . '">' . htmlspecialchars($verbatim_texts, ENT_QUOTES, 'UTF-8') . '</span>';
                
        //         // 定位错误内容在当前内容中的位置（支持多字节字符，如中文）
        //         $startPos = mb_strpos($currentContent, $verbatim_texts, 0, 'UTF-8');
        //         if ($startPos === false) {
        //             continue; // 未找到错误内容，跳过
        //         }
                
        //         // 计算错误内容的字节长度（用于替换）
        //         $byteLength = strlen($verbatim_texts);
        //         // 转换字符起始位置为字节位置（适配substr_replace的字节处理）
        //         $byteStart = 0;
        //         for ($i = 0; $i < $startPos; $i++) {
        //             $byteStart += strlen(mb_substr($currentContent, $i, 1, 'UTF-8'));
        //         }
                
        //         // 执行替换：用带样式的内容替换原始错误内容
        //         $currentContent = substr_replace($currentContent, $revised_content, $byteStart, $byteLength);
        //     }
            
        //     // 保存当前文章处理后的最终内容
        //     $aFinalContent[$amId] = $currentContent;
        // }
        return json_encode(['status' => 1,'msg' => 'success','data' => ['record' => $aData]]);//,'record_style' => $aFinalContent
    }

    /**
     * @title 更新状态
     * @param article_id 文章ID
     * @param am_id 行号
     * @param record_id 记录ID
     * @param state 1已执行2未执行3撤销
     */
    public function change(){
        //获取参数
        $aParam = $this->request->post();
        //参数验证-文章ID
        $iArticleId = empty($aParam['article_id']) ? 0 : $aParam['article_id'];
        if(empty($iArticleId)){
           return json_encode(['status' => 2,'msg' => 'Please select a article']);
        }
        //参数验证-行号ID
        $iAmId = empty($aParam['am_id']) ? 0 : $aParam['am_id'];
        if(empty($iAmId)){
           return json_encode(['status' => 2,'msg' => 'Please select the proofreading content']);
        }
        //主键ID
        $iId = empty($aParam['record_id']) ? 0 : $aParam['record_id'];
        if(empty($iId)){
           return json_encode(['status' => 2,'msg' => 'Please select the review record']);
        }
        //状态
        $iState = empty($aParam['state']) ? 0 : intval($aParam['state']);
        if(!in_array($iState, [1,2,3])){
            return json_encode(['status' => 2,'msg' => 'Illegal review status']);
        }

        //修改内容
        $sContent = empty($aParam['content']) ? '' : $aParam['content'];
        if(in_array($iState, [1,2]) && empty($sContent)){
            return json_encode(['status' => 2,'msg' => 'The operation content cannot be empty']);
        }

        //判断校对记录
        $aWhere = ['am_id' => $iAmId,'article_id' => $iArticleId,'id' => $iId];
        $aProofRead = Db::name('article_proofread')->where($aWhere)->find();

        if(empty($aProofRead)){
            return json_encode(['status' => 3,'msg' => 'Proofreading record is empty']);
        }
        if($aProofRead['state'] == 3){
            return json_encode(['status' => 4,'msg' => 'Record deleted']);
        }

        //状态一致
        if($iState == $aProofRead['state']){
            return json_encode(['status' => 5,'msg' => 'Consistent status without modification']);
        }

        //判断记录是否执行
        if($iState == 3 && $aProofRead['state'] == 1){
            return json_encode(['status' => 6,'msg' => 'This record has been executed and cannot be deleted']);
        }
        $sData = $sUpdateContent = '';
        if($iState == 1){ //执行替换操作
            $aProofRead['content'] = $sContent;
            $aResult = $this->replaceError($aProofRead);
            $iStatus = empty($aResult['status']) ? 0 : $aResult['status'];
            if($iStatus != 1){
                return json_encode($aResult);
            }
            //获取内容
            $sUpdateContent = empty($aResult['data']) ? '' : $aResult['data'];
            if(empty($sUpdateContent)){
                return json_encode(['status' => 5,'msg' => 'Content processing failed']);
            }
            // $aDealData = json_decode($this->get(['am_id' => $iAmId,'article_id' => $iArticleId]),true);
            // $aDealData = empty($aDealData['data']) ? [] : $aDealData['data'];
            // $sData = empty($aDealData['record_style']) ? '' : $aDealData['record_style']; 
            $sData = $sUpdateContent;
        }
        if($iState == 2){ //执行替换操作
            $aProofRead['content'] = $sContent;
            $aResult = $this->removeReplaceError($aProofRead);
            $iStatus = empty($aResult['status']) ? 0 : $aResult['status'];
            if($iStatus != 1){
                return json_encode($aResult);
            }
            //获取内容
            $sUpdateContent = empty($aResult['data']) ? '' : $aResult['data'];
            if(empty($sUpdateContent)){
                return json_encode(['status' => 5,'msg' => 'Content processing failed']);
            }
            // $aDealData = json_decode($this->get(['am_id' => $iAmId,'article_id' => $iArticleId]),true);
            // $aDealData = empty($aDealData['data']) ? [] : $aDealData['data'];
            // $sData = empty($aDealData['record_style']) ? '' : $aDealData['record_style']; 
            $sData = $sUpdateContent;
        }
        Db::startTrans();
        //更新原始内容
        if(!empty($sUpdateContent)){
            $aWhere = ['am_id' => $iAmId,'state' => 0,'type' => 0];
            $aUpdate = ['content' => $sUpdateContent];
            $result_main = Db::name('article_main')->where($aWhere)->limit(1)->update($aUpdate);
        }
        //判断更新参数
        $aUpdate = ['state' => $iState,'update_time' => time()];
        //数据库更新
        $aWhere = ['id' => $iId];
        $result_proofread= Db::name('article_proofread')->where($aWhere)->limit(1)->update($aUpdate);
        if(!$result_proofread || !$result_main){
            return json_encode(['status' => 7,'msg' => "Update failed"]);
        }
        Db::commit();
        //返回结果
        return json_encode(['status' => 1,'msg' => "Update successful",'data' => $sData]);
    }

    /**
     * 替换错误
     * @param string $errorId 错误ID
     * @return bool 替换是否成功
     */
    private function replaceError($aParam = [])
    {
        if(empty($aParam)){
            return ['status' => 2,'msg' => 'The content is empty'];
        }
        //原始内容
        $sContent = empty($aParam['content']) ? '' : $aParam['content'];
        //错误内容
        $verbatim_texts = empty($aParam['verbatim_texts']) ? '' : $aParam['verbatim_texts'];
        //正确内容
        $revised_content = empty($aParam['revised_content']) ? 0 : $aParam['revised_content'];

        $iLength = strlen($verbatim_texts);
        //内容替换
        $sContent = $this->replaceByLengthAndKeyword($sContent,$iLength,$verbatim_texts,$revised_content);
        
        return ['status' => 1,'msg' => 'success','data' => $sContent];
    }

    /**
     * 撤回替换错误
     * @param string $errorId 错误ID
     * @return bool 替换是否成功
     */
    private function removeReplaceError($aParam = [])
    {
        if(empty($aParam)){
            return ['status' => 2,'msg' => 'The content is empty'];
        }
        //原始内容
        $sContent = empty($aParam['content']) ? '' : $aParam['content'];
        //错误内容
        $verbatim_texts = empty($aParam['verbatim_texts']) ? '' : $aParam['verbatim_texts'];
        //正确内容
        $revised_content = empty($aParam['revised_content']) ? '' : $aParam['revised_content'];

        $iLength = strlen($revised_content);
        //内容替换
        $sContent = $this->replaceByLengthAndKeyword($sContent,$iLength,$revised_content,$verbatim_texts);
        
        return ['status' => 1,'msg' => 'success','data' => $sContent];
    }
    /**
     * 按长度和内容特征快速定位并替换字符串
     * @param string $str 原始字符串
     * @param int $targetLength 目标子串长度（字节数，多字节字符需注意）
     * @param string $keyword 筛选关键词（目标子串需包含此关键词）
     * @param string $replace 替换内容
     * @param string $encoding 字符编码（默认UTF-8，处理多字节字符）
     * @return string 替换后的字符串
     */
    private function replaceByLengthAndKeyword($str, $targetLength, $keyword, $replace, $encoding = 'UTF-8') {
        // 边界校验：避免无效参数导致错误
        if (empty($str) || $targetLength <= 0 || empty($keyword)) {
            return '';
        }
        $strLength = strlen($str);
        if ($targetLength > $strLength) {
            return ''; // 目标长度超过原始字符串，无需处理
        }

        $result = $str;
        $targets = []; // 存储目标子串的起始位置（字节索引）

        // 遍历字符串，提取符合长度且包含关键词的子串位置（一次遍历完成筛选，减少内存占用）
        for ($i = 0; $i <= $strLength - $targetLength; $i++) {
            // 截取目标长度的子串
            $substr = substr($result, $i, $targetLength);
            // 检查子串是否包含关键词（多字节安全）
            if (mb_strpos($substr, $keyword, 0, $encoding) !== false) {
                $targets[] = $i; // 只存起始位置，减少内存占用
            }
        }

        // 若没有匹配目标，直接返回原始字符串
        if (empty($targets)) {
            return '';
        }

        // 从后往前替换（避免前面替换导致后面位置偏移）
        // 倒序遍历数组，无需额外排序，效率更高
        for ($k = count($targets) - 1; $k >= 0; $k--) {
            $start = $targets[$k];
            // 二次校验：替换前确认子串仍符合条件（防止重复替换或中间修改导致的偏差）
            $currentSubstr = substr($result, $start, $targetLength);
            if (mb_strpos($currentSubstr, $keyword, 0, $encoding) !== false) {
                $result = substr_replace($result, $replace, $start, $targetLength);
            }
        }

        return $result;
    }

    /**
     * @title 更新内容
     * @param article_id 文章ID
     * @param am_id 行号
     * @param record_id 记录ID
     * @param revised_content 修改内容
     * @param is_update_all 是否更新所有1是2否
     */
    public function modify(){
        //获取参数
        $aParam = $this->request->post();
        //参数验证-文章ID
        $iArticleId = empty($aParam['article_id']) ? 0 : $aParam['article_id'];
        if(empty($iArticleId)){
           return json_encode(['status' => 2,'msg' => 'Please select a article']);
        }
        //参数验证-行号ID
        $iAmId = empty($aParam['am_id']) ? 0 : $aParam['am_id'];
        if(empty($iAmId)){
           return json_encode(['status' => 2,'msg' => 'Please select the proofreading content']);
        }
        //主键ID
        $iId = empty($aParam['record_id']) ? 0 : $aParam['record_id'];
        if(empty($iId)){
           return json_encode(['status' => 2,'msg' => 'Please select the review record']);
        }
        //修改后的内容
        $sRevisedContent = empty($aParam['revised_content']) ? '' : $aParam['revised_content'];
        if(empty($sRevisedContent)){
            return json_encode(['status' => 2,'msg' => 'Please enter the modification content']);
        }
        //解释说明
        $sExplanation = empty($aParam['explanation']) ? '' : $aParam['explanation'];
        //是否更新所有1是2否
        $iIsUpdateAll = empty($aParam['is_update_all']) ? 2 : $aParam['is_update_all'];

        //查询内容是否存在
        $aWhere = ['am_id' => $iAmId,'article_id' => $iArticleId,'id' => $iId];
        $aProofRead = Db::name('article_proofread')->field('verbatim_texts,revised_content,explanation,state')->where($aWhere)->find();
        if(empty($aProofRead)){
            return json_encode(['status' => 3,'msg' => 'Proofreading record is empty']);
        }
        if($aProofRead['state'] == 3){
            return json_encode(['status' => 4,'msg' => 'Record deleted']);
        }
        if($aProofRead['state'] == 1){
            return json_encode(['status' => 5,'msg' => 'Record executed']);
        }
        //判断更新参数
        $aUpdate = ['revised_content' => $sRevisedContent,'update_time' => time()];
        if(!empty($sExplanation)){
            $aUpdate['explanation'] = $sExplanation;
        }
        //数据库更新
        $aWhere = ['id' => $iId];
        if($iIsUpdateAll == 1){
            if(empty($aProofRead['verbatim_texts']) || empty($aProofRead['revised_content'])){
                return json_encode(['status' => 6,'msg' => 'AI proofreading content is empty']);
            }
            $aWhere = ['verbatim_texts' => $aProofRead['verbatim_texts'],'revised_content' => $aProofRead['revised_content'],'article_id' => $iArticleId,'state' => 2];
        }
        $result = Db::name('article_proofread')->where($aWhere)->update($aUpdate);
        if(!$result){
            return json_encode(['status' => 7,'msg' => "Update failed"]);
        }
        //返回结果
        return json_encode(['status' => 1,'msg' => "Update successful"]); 
    }
}