<?php

namespace App\Jobs;

use App\Enums\AnalysisMode;
use App\Models\LogAnalysisReport;
use App\Services\AiService;
use App\Services\CodeContextService;
use App\Services\ConfigService;
use App\Services\DingTalkService;
use App\Services\SlsService;
use Carbon\Carbon;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Log;

class LogAnalysisJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public int $timeout = 600; // 10 分钟超时
    public int $tries = 1; // 只尝试一次

    public function __construct(
        private readonly int $reportId,
        private readonly Carbon $from,
        private readonly Carbon $to,
        private readonly ?string $query,
        private readonly AnalysisMode $mode,
        private readonly bool $pushNotification = false
    ) {}

    public function handle(
        SlsService $slsService,
        AiService $aiService,
        CodeContextService $codeContextService,
        ConfigService $configService,
        DingTalkService $dingTalkService
    ): void {
        $report = LogAnalysisReport::find($this->reportId);
        if (!$report) {
            Log::error("LogAnalysisJob: Report not found", ['report_id' => $this->reportId]);
            return;
        }

        try {
            $startTime = microtime(true);

            // 1. 获取日志
            $logs = $slsService->fetchLogs($this->from, $this->to, $this->query);

            if ($logs->isEmpty()) {
                $report->update([
                    'status' => 'completed',
                    'total_logs' => 0,
                    'results' => [],
                    'metadata' => [
                        'total_logs' => 0,
                        'apps_analyzed' => 0,
                        'execution_time_ms' => 0,
                        'analyzed_at' => Carbon::now()->format('Y-m-d H:i:s'),
                        'message' => '未找到匹配的日志',
                    ],
                ]);
                return;
            }

            // 2. 按 app_name 分组
            $grouped = $slsService->groupByAppName($logs);

            // 3. 分析每个分组
            $results = [];
            $settings = $configService->get('log_analysis.settings', []);
            $maxLogsPerApp = $settings['max_logs_per_app'] ?? 500;

            foreach ($grouped as $appName => $appLogs) {
                $appLogsCollection = collect($appLogs);

                // 限制每个 app 的日志数量
                if ($appLogsCollection->count() > $maxLogsPerApp) {
                    $appLogsCollection = $appLogsCollection->take($maxLogsPerApp);
                }

                // 获取代码上下文（如果需要）
                $codeContext = null;
                if ($this->mode === AnalysisMode::LogsWithCode) {
                    $repoPath = $codeContextService->getRepoPath($appName);
                    if ($repoPath) {
                        $codeContext = $codeContextService->extractRelevantCode($repoPath, $appLogsCollection);
                    }
                }

                // 准备日志内容
                $logsContent = $this->formatLogsForAnalysis($appLogsCollection);

                // AI 分析
                try {
                    $results[$appName] = $aiService->analyzeLogs($logsContent, $codeContext);
                    $results[$appName]['log_count'] = $appLogsCollection->count();
                    $results[$appName]['has_code_context'] = $codeContext !== null;
                } catch (\Exception $e) {
                    $results[$appName] = [
                        'error' => $e->getMessage(),
                        'log_count' => $appLogsCollection->count(),
                        'has_code_context' => false,
                    ];
                }
            }

            $executionTime = (microtime(true) - $startTime) * 1000;

            // 4. 更新报告
            $report->update([
                'status' => 'completed',
                'total_logs' => $logs->count(),
                'results' => $results,
                'metadata' => [
                    'total_logs' => $logs->count(),
                    'apps_analyzed' => count($results),
                    'execution_time_ms' => round($executionTime),
                    'analyzed_at' => Carbon::now()->format('Y-m-d H:i:s'),
                ],
            ]);

            // 5. 推送通知（如果需要）
            if ($this->pushNotification) {
                $this->pushToNotification($report, $dingTalkService);
            }

            Log::info("LogAnalysisJob: Completed", [
                'report_id' => $this->reportId,
                'total_logs' => $logs->count(),
                'execution_time_ms' => round($executionTime),
            ]);

        } catch (\Exception $e) {
            Log::error("LogAnalysisJob: Failed", [
                'report_id' => $this->reportId,
                'error' => $e->getMessage(),
            ]);

            $report->update([
                'status' => 'failed',
                'error_message' => $e->getMessage(),
            ]);
        }
    }

    private function formatLogsForAnalysis(Collection $logs): string
    {
        $formatted = [];

        foreach ($logs as $log) {
            $line = sprintf(
                "[%s] [%s] %s",
                $log['time'] ?? 'N/A',
                $log['level'] ?? 'N/A',
                $log['message'] ?? json_encode($log['_raw'] ?? $log)
            );

            if (!empty($log['trace'])) {
                $line .= "\n" . $log['trace'];
            }

            $formatted[] = $line;
        }

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

    private function pushToNotification(LogAnalysisReport $report, DingTalkService $dingTalkService): void
    {
        $lines = [];
        $lines[] = "📊 SLS 日志分析报告";
        $lines[] = "时间范围: {$report->from_time->format('Y-m-d H:i:s')} ~ {$report->to_time->format('Y-m-d H:i:s')}";
        $lines[] = "总日志数: {$report->total_logs}";
        $lines[] = "";

        foreach ($report->results as $appName => $appResult) {
            $lines[] = "【{$appName}】";

            if (isset($appResult['error'])) {
                $lines[] = "  分析失败: {$appResult['error']}";
                continue;
            }

            $impact = $appResult['impact'] ?? 'unknown';
            $impactEmoji = match ($impact) {
                'high' => '🔴',
                'medium' => '🟡',
                'low' => '🟢',
                default => '⚪',
            };

            $lines[] = "  影响级别: {$impactEmoji} {$impact}";
            $lines[] = "  摘要: " . ($appResult['summary'] ?? 'N/A');

            $anomalies = $appResult['core_anomalies'] ?? [];
            if (!empty($anomalies)) {
                $lines[] = "  异常数: " . count($anomalies);
                foreach (array_slice($anomalies, 0, 3) as $anomaly) {
                    $lines[] = "    - [{$anomaly['classification']}] {$anomaly['possible_cause']}";
                }
            }

            $lines[] = "";
        }

        $message = implode("\n", $lines);

        try {
            $dingTalkService->sendText($message);
        } catch (\Exception $e) {
            Log::warning("LogAnalysisJob: Failed to push notification", [
                'report_id' => $this->reportId,
                'error' => $e->getMessage(),
            ]);
        }
    }
}