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<?php
/**
 * Fix Missing Title and Variations Script
 * Repairs tracks that are missing titles or variations by extracting data from callback logs and task_results
 * 
 * Usage: Run this script via browser or command line
 * Example: https://soundstudiopro.com/fix_missing_title_and_variations.php?artist_id=22&confirm=yes
 */

session_start();
require_once 'config/database.php';

// Security: Only allow admins or run with confirmation
$is_admin = isset($_SESSION['is_admin']) && $_SESSION['is_admin'];
$confirm = $_GET['confirm'] ?? 'false';

// If not admin, require explicit confirmation
if (!$is_admin && $confirm !== 'yes') {
    die("
    <h2>Fix Missing Title and Variations</h2>
    <p>This script will repair tracks missing titles or variations.</p>
    <p><strong>WARNING:</strong> Only run this if you're certain a track needs repair.</p>
    <p>To proceed, add <code>&confirm=yes</code> to the URL.</p>
    <p>Example: <code>fix_missing_title_and_variations.php?artist_id=22&confirm=yes</code></p>
    ");
}

// Helper function to extract title from callback data (same logic as callback.php)
function extractTitleFromCallbackData($data) {
    // Check multiple possible locations in the API response
    if (isset($data['title']) && !empty($data['title']) && trim($data['title']) !== '') {
        return trim($data['title']);
    }
    
    if (isset($data['data']['title']) && !empty($data['data']['title']) && trim($data['data']['title']) !== '') {
        return trim($data['data']['title']);
    }
    
    // Check in data.data array (common API.Box format)
    if (isset($data['data']['data']) && is_array($data['data']['data'])) {
        foreach ($data['data']['data'] as $item) {
            if (isset($item['title']) && !empty($item['title']) && trim($item['title']) !== '') {
                return trim($item['title']);
            }
        }
    }
    
    // Check in direct data array
    if (isset($data['data']) && is_array($data['data']) && !isset($data['data']['data'])) {
        foreach ($data['data'] as $item) {
            if (is_array($item) && isset($item['title']) && !empty($item['title']) && trim($item['title']) !== '') {
                return trim($item['title']);
            }
        }
    }
    
    return null;
}

// Helper function to sanitize text (basic version)
function sanitizeText($text) {
    return htmlspecialchars(strip_tags(trim($text)), ENT_QUOTES, 'UTF-8');
}

try {
    $pdo = getDBConnection();
    
    // Get parameters
    $artist_id = intval($_GET['artist_id'] ?? 22);
    $track_id = intval($_GET['track_id'] ?? 0); // Optional: specific track ID
    
    echo "<h2>Fixing Missing Title and Variations</h2>";
    echo "<p><strong>Artist ID:</strong> {$artist_id}</p>";
    if ($track_id > 0) {
        echo "<p><strong>Track ID:</strong> {$track_id} (specific track)</p>";
    } else {
        echo "<p><strong>Mode:</strong> All tracks for this artist</p>";
    }
    echo "<hr>";
    
    // Find artist
    $stmt = $pdo->prepare("SELECT id, name FROM users WHERE id = ? LIMIT 1");
    $stmt->execute([$artist_id]);
    $artist = $stmt->fetch(PDO::FETCH_ASSOC);
    
    if (!$artist) {
        die("<p style='color: red;'><strong>ERROR:</strong> Artist ID {$artist_id} not found in database.</p>");
    }
    
    echo "<p>✅ Found artist: {$artist['name']} (ID: {$artist_id})</p>";
    
    // Find tracks that need repair
    if ($track_id > 0) {
        $stmt = $pdo->prepare("
            SELECT 
                mt.id,
                mt.task_id,
                mt.title,
                mt.status,
                mt.created_at,
                (SELECT COUNT(*) FROM audio_variations WHERE track_id = mt.id) as actual_variations_count,
                mt.variations_count as stored_variations_count
            FROM music_tracks mt
            WHERE mt.id = ? AND mt.user_id = ?
        ");
        $stmt->execute([$track_id, $artist_id]);
    } else {
        // Find all tracks for this artist that might need repair
        // Tracks with missing titles or mismatched variation counts
        $stmt = $pdo->prepare("
            SELECT 
                mt.id,
                mt.task_id,
                mt.title,
                mt.status,
                mt.created_at,
                (SELECT COUNT(*) FROM audio_variations WHERE track_id = mt.id) as actual_variations_count,
                mt.variations_count as stored_variations_count
            FROM music_tracks mt
            WHERE mt.user_id = ? 
            AND mt.status = 'complete'
            AND (
                mt.title IS NULL 
                OR mt.title = '' 
                OR mt.title = 'Untitled Track'
                OR mt.title = 'Generated Track'
                OR (SELECT COUNT(*) FROM audio_variations WHERE track_id = mt.id) != mt.variations_count
            )
            ORDER BY mt.created_at DESC
            LIMIT 50
        ");
        $stmt->execute([$artist_id]);
    }
    
    $tracks = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    if (empty($tracks)) {
        die("<p style='color: green;'>✅ No tracks found that need repair.</p>");
    }
    
    echo "<p>Found " . count($tracks) . " track(s) that may need repair:</p>";
    echo "<ul>";
    foreach ($tracks as $track) {
        $issues = [];
        if (!$track['title'] || $track['title'] === '' || $track['title'] === 'Untitled Track' || $track['title'] === 'Generated Track') {
            $issues[] = "Missing title";
        }
        if ($track['actual_variations_count'] != $track['stored_variations_count']) {
            $issues[] = "Variation count mismatch (stored: {$track['stored_variations_count']}, actual: {$track['actual_variations_count']})";
        }
        echo "<li>Track ID {$track['id']} (Task: {$track['task_id']}) - " . implode(', ', $issues) . "</li>";
    }
    echo "</ul>";
    echo "<hr>";
    
    $fixed_count = 0;
    $error_count = 0;
    
    foreach ($tracks as $track) {
        echo "<h3>Processing Track ID: {$track['id']}</h3>";
        echo "<p><strong>Task ID:</strong> {$track['task_id']}</p>";
        echo "<p><strong>Current Title:</strong> " . ($track['title'] ?: 'NULL/EMPTY') . "</p>";
        echo "<p><strong>Variations:</strong> Stored={$track['stored_variations_count']}, Actual={$track['actual_variations_count']}</p>";
        
        $needs_title_fix = (!$track['title'] || $track['title'] === '' || $track['title'] === 'Untitled Track' || $track['title'] === 'Generated Track');
        $needs_variation_fix = ($track['actual_variations_count'] != $track['stored_variations_count']);
        
        if (!$needs_title_fix && !$needs_variation_fix) {
            echo "<p style='color: orange;'>⚠️ No issues detected for this track, skipping...</p><hr>";
            continue;
        }
        
        // Try to load task_results JSON file
        $taskResultsFile = __DIR__ . "/task_results/{$track['task_id']}.json";
        $callbackData = null;
        
        if (file_exists($taskResultsFile)) {
            $jsonContent = file_get_contents($taskResultsFile);
            $callbackData = json_decode($jsonContent, true);
            echo "<p>✅ Found task_results JSON file</p>";
        } else {
            echo "<p style='color: orange;'>⚠️ task_results JSON file not found: {$taskResultsFile}</p>";
            echo "<p>Trying to extract from callback log...</p>";
            
            // Try to find in callback log (last resort)
            $logFile = __DIR__ . "/callback_log.txt";
            if (file_exists($logFile)) {
                $logContent = file_get_contents($logFile);
                // Look for the task_id in the log
                $pattern = '/"task_id"\s*:\s*"' . preg_quote($track['task_id'], '/') . '"/';
                if (preg_match($pattern, $logContent)) {
                    echo "<p>✅ Found task_id in callback log (manual extraction would be needed)</p>";
                    // For now, we'll skip if no JSON file
                }
            }
        }
        
        $pdo->beginTransaction();
        
        try {
            $updates = [];
            $params = [];
            
            // Fix title if needed
            if ($needs_title_fix && $callbackData) {
                $extractedTitle = extractTitleFromCallbackData($callbackData);
                
                if ($extractedTitle) {
                    $extractedTitle = sanitizeText($extractedTitle);
                    $updates[] = "title = ?";
                    $params[] = $extractedTitle;
                    echo "<p style='color: green;'>✅ Extracted title: '{$extractedTitle}'</p>";
                } else {
                    echo "<p style='color: orange;'>⚠️ Could not extract title from callback data</p>";
                }
            }
            
            // Fix variation count if needed
            if ($needs_variation_fix) {
                // Update to match actual count in audio_variations table
                $updates[] = "variations_count = ?";
                $params[] = $track['actual_variations_count'];
                echo "<p style='color: green;'>✅ Updating variations_count to {$track['actual_variations_count']}</p>";
            }
            
            if (!empty($updates)) {
                $params[] = $track['id']; // Add track ID for WHERE clause
                $sql = "UPDATE music_tracks SET " . implode(', ', $updates) . " WHERE id = ?";
                $stmt = $pdo->prepare($sql);
                $stmt->execute($params);
                
                echo "<p style='color: green;'>✅ Successfully updated track {$track['id']}</p>";
                $fixed_count++;
            } else {
                echo "<p style='color: orange;'>⚠️ No updates needed (could not extract data)</p>";
            }
            
            $pdo->commit();
            
        } catch (Exception $e) {
            $pdo->rollBack();
            echo "<p style='color: red;'>❌ ERROR updating track {$track['id']}: " . htmlspecialchars($e->getMessage()) . "</p>";
            $error_count++;
        }
        
        echo "<hr>";
    }
    
    echo "<h2>Summary</h2>";
    echo "<p style='color: green;'>✅ Fixed: {$fixed_count} track(s)</p>";
    if ($error_count > 0) {
        echo "<p style='color: red;'>❌ Errors: {$error_count} track(s)</p>";
    }
    echo "<p><a href='/artist_profile.php?id={$artist_id}'>View Artist Profile</a></p>";
    
} catch (Exception $e) {
    echo "<p style='color: red;'><strong>ERROR:</strong> " . htmlspecialchars($e->getMessage()) . "</p>";
    echo "<p>Stack trace:</p><pre>" . htmlspecialchars($e->getTraceAsString()) . "</pre>";
}