<?php
namespace app\api\job;
use think\queue\Job;
use app\api\controller\Aiarticle;
use app\common\QueueJob;
class ArticleAiCreateContent
{

    private $logPath; // 日志路径
    private $queueJob;
    public function __construct()
    {
        $this->queueJob = new QueueJob;
        // 初始化日志路径
        $this->logPath = ROOT_PATH . 'public/queue_log/ArticleAiCreateContent_' . date('Ymd') . '.log';
    }

    /**
     * 安全写入日志（带文件锁）
     */
    private function log($message)
    {
        $time = date('H:i:s');
        $logMsg = "[$time] $message\n";
        $fp = fopen($this->logPath, 'w');
        if ($fp) {
            flock($fp, LOCK_EX); // 排他锁防止并发写入冲突
            fwrite($fp, $logMsg);
            flock($fp, LOCK_UN);
            fclose($fp);
        }
    }

    // 任务日志添加
    public function addLog($aParam = [])
    {
        //实例化
        return $this->queueJob->addLog($aParam);
    }
    
    // 任务日志修改
    public function updateLog($aParam = [])
    {
        return $this->queueJob->updateLog($aParam);
    }

    /**
     * 根据错误信息获取重试延迟
     */
    private function getRetryDelay($errorMsg)
    {
        $delayMap = [
            'MySQL server has gone away' => 60,
            'timeout' => 30,
            'OpenAI' => 45,
            'network' => 60
        ];
        foreach ($delayMap as $keyword => $delay) {
            if (strpos($errorMsg, $keyword) !== false) {
                return $delay;
            }
        }
        return 10; // 默认延迟
    }

    public function fire(Job $job, $data)
    {
        //日志
        $this->log("-----------队列任务开始-----------");

        // 获取文章ID
        $iArticleId = empty($data['article_id']) ? 0 : $data['article_id'];
        if (empty($iArticleId)) {
            $this->log("无效的article_id，删除任务");
            $job->delete();
            return;
        }

        // 生成唯一任务标识
        $sClassName = get_class($this);
        $sRedisKey = "queue_job:{$sClassName}:{$iArticleId}";
        $sRedisValue = uniqid() . '_' . getmypid(); // 增加进程ID确保唯一性

        // 尝试获取Redis锁（原子操作）
        $isLocked = $this->queueJob->setRedisLock($sRedisKey, $sRedisValue, 86400);
        if (!$isLocked) {
            $currentValue = $this->queueJob->getRedisValue($sRedisKey);
            $this->log("任务已被锁定，避免重复执行 | 锁键: {$sRedisKey} | 锁值: {$currentValue}");
            // 检查任务是否已超过最大重试次数
            if ($job->attempts() >= 2) {
                $this->log("任务超过最大重试次数，停止重试");
                $job->delete();
            } else {
                $delay = $this->getRetryDelay("任务已锁定");
                $this->log("{$delay}秒后重试任务 | 重试次数: {$job->attempts()}");
                $job->release($delay);
            }
            return;
        }

        // 任务基础信息
        $aParam = [
            'job_id'      => $sRedisKey,
            'job_class'   => $sClassName,
            'status'      => 0, // 0:处理中
            'create_time' => time(),
            'params'      => json_encode($data, JSON_UNESCAPED_UNICODE)
        ];
        // 创建任务日志记录
        $iLogId = $this->addLog($aParam);
        if(!$iLogId) {
            $this->log("日志创建失败，释放锁并删除任务:".json_encode($data));
            $this->queueJob->releaseRedisLock($sRedisKey, $sRedisValue);
            $job->delete();
            return;
        }
        try {
            // 执行核心任务
            //生成内容
            $oAiarticle = new Aiarticle;
            $aResult = json_decode($oAiarticle->create($data),true);
            $iStatus = empty($aResult['status']) ? 0 : $aResult['status']; 
            $sMsg = empty($aResult['msg']) ? '内容生成失败' : $aResult['msg'];
            //更新任务状态
            $aParam = ['log_id' => $iLogId,'status' => 1,'update_time' => time(),'error' => $sMsg];
            $this->updateLog($aParam);
            //删除任务
            $job->delete();
            $this->log("任务执行成功，已删除任务 | 日志ID: {$iLogId}");
        } catch (\Exception $e) {

            //错误信息
            $sMsg = empty($e->getMessage()) ? '任务出错' : $e->getMessage(); // 错误信息
            $sTrace = empty($e->getTraceAsString()) ? '' : $e->getTraceAsString();
            $this->log("任务执行异常: {$sMsg} | 堆栈: {$sTrace}");
            // 记录失败日志
            $this->updateLog([
                'log_id'     => $iLogId,
                'status'     => 2,
                'update_time' => time(),
                'error'      => $sMsg.':'.$sTrace,
            ]);
            // 重试策略
            $attempts = $job->attempts();
            if ($attempts >= 2) {
                $this->log("任务已重试{$attempts}次，停止重试");
                $job->delete();
            } else {
                $delay = $this->getRetryDelay($sMsg);
                $this->log("{$delay}秒后重试任务 | 重试次数: {$attempts}");
                $job->release($delay);
            }
        } finally {
            // 无论成功失败都释放锁（确保锁值匹配）
            $releaseResult = $this->queueJob->releaseRedisLock($sRedisKey, $sRedisValue);
            if (!$releaseResult) {
                $this->log("释放锁失败 | 锁键: {$sRedisKey} | 锁值: {$sRedisValue}");
            } else {
                $this->log("成功释放锁 | 锁键: {$sRedisKey}");
            }
            gc_collect_cycles();
        }
    }
}