<?php
require_once '../../includes/config.php';
require_once '../../includes/auth.php';
require_once '../../includes/stories.php';

header('Content-Type: application/json');

if (!Auth::check()) {
    http_response_code(401);
    exit(json_encode(['error' => 'Non autorisé']));
}

$storyId = $_GET['storyId'] ?? '';
$chapterId = $_GET['chapterId'] ?? '';

if (!$storyId || !$chapterId) {
    http_response_code(400);
    exit(json_encode(['error' => 'Paramètres manquants']));
}

try {
    $story = Stories::get($storyId);
    if (!$story) {
        throw new Exception('Roman non trouvé');
    }

    $chapter = null;
    foreach ($story['chapters'] as $ch) {
        if ($ch['id'] === $chapterId) {
            $chapter = $ch;
            break;
        }
    }

    if (!$chapter) {
        throw new Exception('Chapitre non trouvé');
    }

    // Vérification et correction de la structure du chapitre
    if (!isset($chapter['title'])) {
        $chapter['title'] = '';
    }

    // Conversion du contenu HTML en format Delta de Quill si nécessaire
    if (!isset($chapter['content'])) {
        $chapter['content'] = '{"ops":[{"insert":"\n"}]}';
    } else {
        // Si le contenu est une chaîne HTML
        if (is_string($chapter['content']) && !isJson($chapter['content'])) {
            // On envoie le HTML brut, Quill le convertira côté client
            $chapter['html'] = $chapter['content'];
            $chapter['content'] = null;
        }
    }

    echo json_encode($chapter);
} catch (Exception $e) {
    error_log('Erreur dans get-chapter.php: ' . $e->getMessage());
    http_response_code(500);
    echo json_encode([
        'error' => $e->getMessage(),
        'details' => [
            'storyId' => $storyId,
            'chapterId' => $chapterId,
            'file' => __FILE__,
            'line' => __LINE__
        ]
    ]);
}

function isJson($string) {
    json_decode($string);
    return json_last_error() === JSON_ERROR_NONE;
}