<?php

require_once __DIR__ . '/../app/bootstrap.php';

use App\Core\Database;
use App\Services\CurriculumService;
use App\Services\VideoService;
use App\Services\AiVideoAnalyzerService;

$taskId = $argv[1] ?? '';
$dir = __DIR__ . '/../storage/curriculum/processing';
$stateFile = $dir . '/' . basename($taskId) . '.json';

function updateVideoTask(string $file, array $changes): void {
    $state = file_exists($file) ? (json_decode(file_get_contents($file), true) ?: []) : [];
    file_put_contents($file, json_encode(array_merge($state, $changes), JSON_UNESCAPED_UNICODE));
}

if ($taskId === '' || !file_exists($stateFile)) exit(1);
$task = json_decode(file_get_contents($stateFile), true) ?: [];

try {
    updateVideoTask($stateFile, ['status' => 'processing', 'progress' => 15, 'message' => 'جاري تحويل الفيديو إلى HLS...']);
    $file = (string)($task['file'] ?? '');
    $manifestLesson = CurriculumService::findLessonByFile($file);
    $title = $manifestLesson['title'] ?? basename($file, '.md');
    $existing = Database::selectOne('SELECT id, course_id FROM lessons WHERE curriculum_key = ? OR title = ? OR markdown_content LIKE ? LIMIT 1', [$file, $title, '%' . $file . '%']);
    $courseId = $existing ? (int)$existing['course_id'] : CurriculumService::getOrCreateSystemCourse();
    $uploaded = VideoService::handleDirectUpload([
        'error' => UPLOAD_ERR_OK, 'tmp_name' => $task['video_path'],
        'name' => $task['original_name'] ?? 'lesson.mp4', 'size' => filesize($task['video_path'])
    ], $courseId, $title);
    updateVideoTask($stateFile, ['progress' => 80, 'message' => 'تم رفع حزمة HLS إلى Cloudflare R2، جاري تثبيت الدرس...']);
    $videoUrl = $uploaded['hls_url'] ?? $uploaded['r2_url'] ?? null;
    if ($existing) {
        $lessonId = (int)$existing['id'];
        Database::query("UPDATE lessons SET curriculum_key = ?, storage_type = 'api_upload', video_uuid = ?, bunny_video_id = '', local_path = ?, hls_url = ?, thumbnail_url = ?, duration_seconds = ?, encoding_status = 'ready', ai_video_url = ? WHERE id = ?", [$file, $uploaded['video_uuid'], $uploaded['local_path'], $uploaded['hls_url'], $uploaded['thumbnail_url'], $uploaded['duration'] ?? 0, $videoUrl, $lessonId]);
    } else {
        $lessonId = Database::insert("INSERT INTO lessons (course_id, title, curriculum_key, sequence_order, storage_type, video_uuid, bunny_video_id, local_path, hls_url, thumbnail_url, duration_seconds, is_free_preview, encoding_status, ai_video_url) VALUES (?, ?, ?, 1, 'api_upload', ?, '', ?, ?, ?, ?, 0, 'ready', ?)", [$courseId, $title, $file, $uploaded['video_uuid'], $uploaded['local_path'], $uploaded['hls_url'], $uploaded['thumbnail_url'], $uploaded['duration'] ?? 0, $videoUrl]);
    }
    try { AiVideoAnalyzerService::processLessonAutonomously((int)$lessonId); } catch (Throwable $e) { error_log('Video AI analysis deferred: ' . $e->getMessage()); }
    $assets = CurriculumService::getLessonAiAssets($file);
    $assets['ai_video_url'] = $videoUrl;
    CurriculumService::saveLessonAiAssets($file, $assets);
    updateVideoTask($stateFile, ['status' => 'completed', 'progress' => 100, 'message' => 'تم رفع الفيديو وربطه بالدرس بنجاح.', 'lesson_id' => (int)$lessonId, 'video_url' => $videoUrl]);
} catch (Throwable $e) {
    if (!empty($task['video_path']) && is_file($task['video_path'])) @unlink($task['video_path']);
    updateVideoTask($stateFile, ['status' => 'error', 'progress' => 100, 'message' => $e->getMessage()]);
}