<?php

declare(strict_types=1);

require_once dirname(__DIR__) . '/app/bootstrap.php';

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

echo "=== DIAGNOSING CURRICULUM TREE ENRICHMENT ===\n\n";

// 1. Database check
try {
    $approvedCount = Database::selectOne("SELECT COUNT(*) as cnt FROM curriculum_lessons WHERE source_status = 'approved'");
    echo "1. Database Status:\n";
    echo "   Approved curriculum lessons in DB: " . ($approvedCount['cnt'] ?? 0) . "\n";
    
    $samples = Database::select("SELECT id, uuid, source_manifest_path, source_status FROM curriculum_lessons WHERE source_status = 'approved' LIMIT 3");
    foreach ($samples as $s) {
        echo "   - [{$s['source_status']}] uuid: {$s['uuid']} | path: {$s['source_manifest_path']}\n";
    }
} catch (Throwable $e) {
    echo "   ERROR querying curriculum_lessons: " . $e->getMessage() . "\n";
}

// 2. Storage manifest.json check
echo "\n2. Live manifest.json check:\n";
$tree = CurriculumService::getCurriculumTree();
if (empty($tree)) {
    echo "   ERROR: CurriculumService::getCurriculumTree() returned empty array!\n";
    echo "   Check: backend/storage/curriculum/manifest.json\n";
} else {
    $firstLesson = $tree['grade_10']['subjects']['math_10']['semesters']['semester_1']['units']['unit_01']['lessons'][1] ?? null;
    echo "   Grade 10 math lesson 1 in manifest.json:\n";
    if ($firstLesson) {
        echo "   - id: " . ($firstLesson['id'] ?? '') . "\n";
        echo "   - file: " . ($firstLesson['file'] ?? '') . "\n";
    } else {
        echo "   - Not found at expected key!\n";
    }
}

// 3. Test Enrichment Logic directly
echo "\n3. Testing Tree Enrichment Logic:\n";
try {
    $approvedLessons = Database::select("SELECT id, uuid, source_manifest_path FROM curriculum_lessons WHERE source_status='approved'");
    $byPath = [];
    foreach ($approvedLessons as $row) {
        $p = (string)$row['source_manifest_path'];
        $byPath[$p] = [
            'curriculum_lesson_id' => (string)$row['uuid'],
            'has_video' => false,
        ];
    }
    echo "   Mapped " . count($byPath) . " paths in \$byPath lookup table.\n";

    $matchCount = 0;
    foreach ($tree as &$grade) {
        foreach (($grade['subjects'] ?? []) as &$subject) {
            foreach (($subject['semesters'] ?? []) as &$semester) {
                foreach (($semester['units'] ?? []) as &$unit) {
                    foreach (($unit['lessons'] ?? []) as &$lesson) {
                        $path = (string)($lesson['file'] ?? '');
                        if (isset($byPath[$path])) {
                            $lesson = array_merge($lesson, $byPath[$path]);
                            $matchCount++;
                        }
                    }
                }
            }
        }
    }
    unset($grade, $subject, $semester, $unit, $lesson);

    echo "   Enriched matches in manifest.json tree: {$matchCount}\n";
    
    // Check if first lesson got enriched
    $sampleEnriched = $tree['grade_10']['subjects']['math_10']['semesters']['semester_1']['units']['unit_01']['lessons'][1] ?? null;
    if (!empty($sampleEnriched['curriculum_lesson_id'])) {
        echo "\n=== SUCCESS! Enrichment logic works perfectly in CLI! ===\n";
        echo "Sample enriched lesson:\n";
        print_r($sampleEnriched);
        echo "\nNOTE: If curl returns empty while CLI works, PHP-FPM has cached the old bytecode in OPcache.\n";
        echo "Run: systemctl reload php8.3-fpm (or your server php-fpm service) to reload PHP-FPM.\n";
    } else {
        echo "\n=== WARNING: Sample lesson did not get enriched. Checking sample path... ===\n";
        $samplePath = $sampleEnriched['file'] ?? 'none';
        echo "Sample path is: '{$samplePath}'\n";
        echo "Is set in \$byPath? " . (isset($byPath[$samplePath]) ? "YES" : "NO") . "\n";
        if (!isset($byPath[$samplePath])) {
            echo "Top 5 paths in \$byPath:\n";
            print_r(array_slice(array_keys($byPath), 0, 5));
        }
    }
} catch (Throwable $e) {
    echo "   EXCEPTION during enrichment: " . $e->getMessage() . "\n";
    echo $e->getTraceAsString() . "\n";
}