<?php
// upload_details.php - Step 2: Enter mix details and finalize upload

require_once 'includes/globals.php';
require_once 'vendor/autoload.php';

use DJMixHosting\Database;
use DJMixHosting\Genres;
use DJMixHosting\DJs;
use Aws\Credentials\Credentials;

// Ensure user is authenticated and an upload task exists
if (!isset($_SESSION['user']) || !isset($_SESSION['upload_task'])) {
    header("Location: upload.php");
    exit;
}

$uploadTask = $_SESSION['upload_task'];

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // Get form fields
    $title = trim($_POST['title'] ?? '');
    $description = trim($_POST['description'] ?? '');
    $recorded = trim($_POST['recorded'] ?? '');
    $selectedGenres = $_POST['genres'] ?? [];  // an array of genre IDs or names
    $dj1 = $_POST['dj1'] ?? 0;
    $dj2 = $_POST['dj2'] ?? 0;
    $dj3 = $_POST['dj3'] ?? 0;

    // Basic validation
    if (empty($title)) {
        $_SESSION['error'] = "Mix title is required.";
        header("Location: upload_details.php");
        exit;
    }

    // Generate a slug from the title
    function slugify($text) {
        // Replace non-letter or digits by -
        $text = preg_replace('~[^\pL\d]+~u', '-', $text);
        // Transliterate
        $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);
        // Remove unwanted characters
        $text = preg_replace('~[^-\w]+~', '', $text);
        // Trim
        $text = trim($text, '-');
        // Remove duplicate -
        $text = preg_replace('~-+~', '-', $text);
        // Lowercase
        $text = strtolower($text);
        return empty($text) ? 'n-a' : $text;
    }
    $slug = slugify($title);


    $credentials = new Credentials(
        $config['aws']['s3']['access_key'],
        $config['aws']['s3']['secret_key']
    );

    $s3Client = new Aws\S3\S3Client([
        'version'                     => 'latest',
        'region'                      => $config['aws']['s3']['region'],
        'endpoint'                    => $config['aws']['s3']['host'],
        'credentials'                 => $credentials,
        'use_path_style_endpoint'     => true,
        'profile'                     => null,  // disable reading ~/.aws/config
        'use_aws_shared_config_files' => false,
    ]);

    // Determine remote file path – for now, store in a temporary folder on Spaces
    $remotePath = "temp/mixes/" . uniqid() . "_" . basename($uploadTask['local_path']);

    // Determine MIME type from file extension
    $mimeType = ($uploadTask['ext'] === 'mp3') ? 'audio/mpeg' : 'application/zip';

    try {
        $s3Client->putObject([
            'Bucket' => $config['aws']['s3']['bucket'],
            'Key' => $remotePath,
            'SourceFile' => $uploadTask['local_path'],
            'ACL' => 'private',  // file remains hidden until approved
            'ContentType' => $mimeType,
        ]);
    } catch (Exception $e) {
        $_SESSION['error'] = "Error uploading file to CDN: " . $e->getMessage();
        header("Location: upload_details.php");
        exit;
    }

    // Now insert a new mix record into the database with pending status.
    $db = new Database($config);
    $stmt = $db->prepare("INSERT INTO mix (title, slug, description, cover, url, seconds, mediaplayer, dj1, dj2, dj3, pending, recorded) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 1, ?)");

    // Determine the duration and mediaplayer flag from the upload task:
    // For an MP3 file, set mediaplayer to 0; for a ZIP file, set it to 1.
    $seconds = 0;
    if ($uploadTask['file_type'] === 'mp3') {
        $seconds = (int)$uploadTask['metadata']['duration'];
        $mediaplayer = 0; // MP3 gets a player
    } elseif ($uploadTask['file_type'] === 'zip') {
        $seconds = (int)$uploadTask['metadata']['total_duration'];
        $mediaplayer = 1; // ZIPs are download only, so flag them as 1
    }
    // The URL can be constructed as per your CDN structure; for now, we store the remote path.
    $url = $remotePath;

    // For DJs, cast to integer (0 if none selected)
    $dj1 = (int)$dj1;
    $dj2 = (int)$dj2;
    $dj3 = (int)$dj3;
    $cover = "";
    $stmt->bind_param("sssssiiiiss", $title, $slug, $description, $cover, $url, $seconds, $mediaplayer, $dj1, $dj2, $dj3, $recorded);
    if (!$stmt->execute()) {
        $_SESSION['error'] = "Error saving mix to database.";
        header("Location: upload_details.php");
        exit;
    }
    $mixId = $stmt->insert_id;
    $stmt->close();

    // Insert mix_meta entries for genres and tracklist
    // For genres, assume $selectedGenres is an array of genre IDs (or names, if new genres need to be added)
    foreach ($selectedGenres as $genreId) {
        $stmt = $db->prepare("INSERT INTO mix_meta (mix_id, attribute, value) VALUES (?, 'genre', ?)");
        $stmt->bind_param("is", $mixId, $genreId);
        $stmt->execute();
        $stmt->close();
    }
    // If the file was mp3 and metadata includes a track title or tracklist, insert that as well:
    if ($uploadTask['file_type'] === 'mp3' && !empty($uploadTask['metadata']['title'])) {
        $tracklist = $uploadTask['metadata']['title'];
        $stmt = $db->prepare("INSERT INTO mix_meta (mix_id, attribute, value) VALUES (?, 'tracklist', ?)");
        $stmt->bind_param("is", $mixId, $tracklist);
        $stmt->execute();
        $stmt->close();
    } elseif ($uploadTask['file_type'] === 'zip' && !empty($uploadTask['metadata']['tracklist'])) {
        // If multiple tracks, you might store them as a newline-separated string
        $tracklist = implode("\n", $uploadTask['metadata']['tracklist']);
        $stmt = $db->prepare("INSERT INTO mix_meta (mix_id, attribute, value) VALUES (?, 'tracklist', ?)");
        $stmt->bind_param("is", $mixId, $tracklist);
        $stmt->execute();
        $stmt->close();
    }

    // Cleanup: delete the local temporary file and clear session task
    unlink($uploadTask['local_path']);
    unset($_SESSION['upload_task']);

    $_SESSION['success'] = "Mix uploaded successfully and is pending approval.";
    header("Location: profile.php");
    exit;
}

require_once 'includes/header.php';

// Load available genres and DJs for the form
$db = new Database($config);
$genresObj = new DJMixHosting\Genres($db);
$allGenres = $genresObj->get_all_genres();
$djsObj = new DJMixHosting\DJs($db);
$allDJs = $djsObj->get_all_djs();

?>

<section class="upload-details-section py-5">
    <div class="container">
        <h2 class="mb-4">Enter Mix Details</h2>
        <?php
        if(isset($_SESSION['error'])) {
            echo '<div class="alert alert-danger">' . htmlspecialchars($_SESSION['error']) . '</div>';
            unset($_SESSION['error']);
        }
        ?>
        <div class="card mb-4">
            <div class="card-body">
                <h5>File Summary</h5>
                <p><strong>Original Name:</strong> <?php echo htmlspecialchars($uploadTask['original_name']); ?></p>
                <p><strong>File Type:</strong> <?php echo htmlspecialchars(strtoupper($uploadTask['file_type'])); ?></p>
                <p><strong>Size:</strong> <?php echo round($uploadTask['size'] / 1024, 2); ?> KB</p>
                <?php if ($uploadTask['file_type'] === 'mp3'): ?>
                    <p><strong>Duration:</strong> <?php echo htmlspecialchars($uploadTask['metadata']['duration']); ?> seconds</p>
                <?php elseif ($uploadTask['file_type'] === 'zip'): ?>
                    <p><strong>Total Duration:</strong> <?php echo htmlspecialchars($uploadTask['metadata']['total_duration']); ?> seconds</p>
                <?php endif; ?>
            </div>
        </div>

        <form action="upload_details.php" method="post" class="needs-validation" novalidate>
            <div class="mb-3">
                <label for="title" class="form-label">Mix Title</label>
                <input type="text" class="form-control" id="title" name="title" required>
            </div>
            <div class="mb-3">
                <label for="description" class="form-label">Mix Description</label>
                <textarea class="form-control" id="description" name="description" rows="3"></textarea>
            </div>
            <div class="mb-3">
                <label for="recorded" class="form-label">Recorded Date</label>
                <input type="date" class="form-control" id="recorded" name="recorded" required>
            </div>
            <div class="mb-3">
                <label for="genres" class="form-label">Select Genres (type to search)</label>
                <select class="form-select" id="genres" name="genres[]" multiple required>
                    <?php foreach ($allGenres as $genre): ?>
                        <option value="<?php echo htmlspecialchars($genre['id']); ?>"><?php echo htmlspecialchars($genre['name']); ?></option>
                    <?php endforeach; ?>
                </select>
            </div>
            <div class="mb-3">
                <label class="form-label">Select DJs (Maximum 3)</label>
                <div class="row">
                    <div class="col">
                        <select class="form-select" name="dj1" required>
                            <option value="">Select DJ 1</option>
                            <?php foreach ($allDJs as $dj): ?>
                                <option value="<?php echo htmlspecialchars($dj['id']); ?>"><?php echo htmlspecialchars($dj['name']); ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="col">
                        <select class="form-select" name="dj2">
                            <option value="">Select DJ 2 (Optional)</option>
                            <?php foreach ($allDJs as $dj): ?>
                                <option value="<?php echo htmlspecialchars($dj['id']); ?>"><?php echo htmlspecialchars($dj['name']); ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="col">
                        <select class="form-select" name="dj3">
                            <option value="">Select DJ 3 (Optional)</option>
                            <?php foreach ($allDJs as $dj): ?>
                                <option value="<?php echo htmlspecialchars($dj['id']); ?>"><?php echo htmlspecialchars($dj['name']); ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                </div>
            </div>
            <button type="submit" class="btn btn-primary">Submit Mix</button>
        </form>
    </div>
</section>

<?php require_once 'includes/footer.php'; ?>