<?php
header("Content-Type: application/json; charset=UTF-8");
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: GET, POST, DELETE, OPTIONS");
header("Access-Control-Allow-Headers: Content-Type, Authorization");
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Pragma: no-cache");

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') { http_response_code(200); exit; }

define('ENCRYPTION_KEY', 'MaCleSecreteSuperRobuste123!');
define('TMDB_CACHE_TTL', 86400); // 24h de cache

try {
    $pdo = new PDO("mysql:host=localhost;dbname=mon_cinema;charset=utf8mb4", "root", "", [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
    ]);
    $pdo->exec("CREATE TABLE IF NOT EXISTS users (id INT PRIMARY KEY, username VARCHAR(50) NOT NULL, password_hash VARCHAR(255) NOT NULL)");
    $pdo->exec("CREATE TABLE IF NOT EXISTS config (key_name VARCHAR(50) PRIMARY KEY, key_value TEXT NOT NULL)");
    $pdo->exec("CREATE TABLE IF NOT EXISTS critiques (id BIGINT PRIMARY KEY, title VARCHAR(255) NOT NULL, year VARCHAR(10), director VARCHAR(255), poster TEXT, rating DECIMAL(3,1) DEFAULT 3.0, review TEXT, streaming VARCHAR(255))");
    $pdo->exec("ALTER TABLE critiques MODIFY COLUMN rating DECIMAL(3,1) DEFAULT 3.0;");
    $pdo->exec("CREATE TABLE IF NOT EXISTS videotheque (id BIGINT PRIMARY KEY, title VARCHAR(255) NOT NULL, year VARCHAR(10), director VARCHAR(255), poster TEXT, format VARCHAR(50), length VARCHAR(50), publisher VARCHAR(255), ean_isbn13 VARCHAR(50), number_of_discs INT DEFAULT 1, aspect_ratio VARCHAR(50), description TEXT)");
    // 🆕 Table de cache pour les images (évite les appels répétés)
    $pdo->exec("CREATE TABLE IF NOT EXISTS cache_images (
        cache_key VARCHAR(120) PRIMARY KEY,
        image_url TEXT,
        source VARCHAR(20),
        created_at INT NOT NULL
    )");
} catch (\PDOException $e) { echo json_encode(["error" => "Erreur BDD : " . $e->getMessage()]); exit; }

function makeStableId($title, $year) {
    $key = strtolower(trim($title ?? '')) . '|' . trim($year ?? '');
    return (abs(crc32($key)) % 2000000000) + 100000000;
}

function checkAuth($pdo) {
    $stmtCheck = $pdo->query("SELECT COUNT(*) FROM users");
    if ($stmtCheck->fetchColumn() == 0) return true;
    $token = $_SERVER['HTTP_AUTHORIZATION'] ?? '';
    if (empty($token) && function_exists('apache_request_headers')) {
        $headers = apache_request_headers();
        $token = $headers['Authorization'] ?? $headers['authorization'] ?? '';
    }
    if ($token !== md5(ENCRYPTION_KEY . 'session')) { http_response_code(403); echo json_encode(["error" => "Accès interdit."]); exit; }
}

function encryptData($data) {
    $iv = openssl_random_pseudo_bytes(16);
    $key = hash('sha256', ENCRYPTION_KEY, true);
    $encrypted = openssl_encrypt($data, 'AES-256-CBC', $key, OPENSSL_RAW_DATA, $iv);
    return base64_encode($encrypted . '::' . $iv);
}

function decryptData($encryptedStr) {
    $decoded = base64_decode($encryptedStr);
    if (strpos($decoded, '::') !== false) { list($encData, $iv) = explode('::', $decoded, 2); } else { return null; }
    $key = hash('sha256', ENCRYPTION_KEY, true);
    $iv = substr($iv, 0, 16);
    return openssl_decrypt($encData, 'AES-256-CBC', $key, OPENSSL_RAW_DATA, $iv);
}

function getTmdbApiKey($pdo) {
    $stmt = $pdo->prepare("SELECT key_value FROM config WHERE key_name = 'tmdb_api_key'");
    $stmt->execute();
    $row = $stmt->fetch();
    if (!$row) return null;
    return decryptData($row['key_value']);
}

// ─ HTTP unifié ──
function httpGet($url, $timeout = 8) {
    if (function_exists('curl_init')) {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_USERAGENT, 'MonCinema/2.0');
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        $res = curl_exec($ch);
        curl_close($ch);
        return $res ?: null;
    }
    $ctx = stream_context_create(['http' => ['timeout' => $timeout, 'user_agent' => 'MonCinema/2.0']]);
    return @file_get_contents($url, false, $ctx);
}

// ── 🎬 RÉCUPÉRATION IMAGE VIA EAN (Open Library API) ─
function fetchImageByEAN($ean, $pdo = null) {
    if (empty($ean) || strlen($ean) < 10) return null;
    
    // Vérifier le cache
    if ($pdo) {
        try {
            $stmt = $pdo->prepare("SELECT image_url FROM cache_images WHERE cache_key = ? AND source = 'ean' AND created_at > ?");
            $stmt->execute(['ean_' . $ean, time() - TMDB_CACHE_TTL]);
            $row = $stmt->fetch();
            if ($row && !empty($row['image_url'])) return $row['image_url'];
        } catch (\Exception $e) { /* ignore */ }
    }
    
    // Open Library API (gratuit, sans clé, spécialisé dans les livres/DVD)
    $url = "https://openlibrary.org/api/books?bibkeys=ISBN:{$ean}&jscmd=data&format=json";
    $res = httpGet($url, 6);
    
    if ($res) {
        $data = json_decode($res, true);
        $key = "ISBN:{$ean}";
        if (isset($data[$key])) {
            $cover = $data[$key]['cover'] ?? [];
            $imageUrl = $cover['large'] ?? $cover['medium'] ?? $cover['small'] ?? null;
            
            // Sauvegarder dans le cache
            if ($imageUrl && $pdo) {
                try {
                    $stmt = $pdo->prepare("REPLACE INTO cache_images (cache_key, image_url, source, created_at) VALUES (?, ?, 'ean', ?)");
                    $stmt->execute(['ean_' . $ean, $imageUrl, time()]);
                } catch (\Exception $e) { /* ignore */ }
            }
            return $imageUrl;
        }
    }
    
    // Fallback : Google Books API
    $url = "https://www.googleapis.com/books/v1/volumes?q=isbn:{$ean}&maxResults=1";
    $res = httpGet($url, 6);
    if ($res) {
        $data = json_decode($res, true);
        if (!empty($data['items'][0]['volumeInfo']['imageLinks']['thumbnail'])) {
            $imageUrl = str_replace('http:', 'https:', $data['items'][0]['volumeInfo']['imageLinks']['thumbnail']);
            if ($pdo) {
                try {
                    $stmt = $pdo->prepare("REPLACE INTO cache_images (cache_key, image_url, source, created_at) VALUES (?, ?, 'google', ?)");
                    $stmt->execute(['ean_' . $ean, $imageUrl, time()]);
                } catch (\Exception $e) { /* ignore */ }
            }
            return $imageUrl;
        }
    }
    
    return null;
}

// ──  RÉCUPÉRATION TMDB (avec cache) ──
function fetchTmdbData($title, $year, $apiKey, $pdo = null) {
    if (empty($apiKey) || empty($title)) return null;
    
    $cleanTitle = preg_replace('/\s*\[.*?\]\s*/', '', $title);
    $cleanTitle = trim($cleanTitle);
    $cacheKey = md5(strtolower($cleanTitle) . '|' . $year);
    
    // Vérifier le cache
    if ($pdo) {
        try {
            $stmt = $pdo->prepare("SELECT image_url FROM cache_images WHERE cache_key = ? AND source = 'tmdb' AND created_at > ?");
            $stmt->execute(['tmdb_' . $cacheKey, time() - TMDB_CACHE_TTL]);
            $row = $stmt->fetch();
            if ($row && !empty($row['image_url'])) {
                // Récupérer aussi le directeur et streaming depuis le cache JSON
                $stmt2 = $pdo->prepare("SELECT image_url FROM cache_images WHERE cache_key = ?");
                $stmt2->execute(['tmdb_full_' . $cacheKey]);
                $row2 = $stmt2->fetch();
                if ($row2) return json_decode($row2['image_url'], true);
            }
        } catch (\Exception $e) { /* ignore */ }
    }
    
    $searchUrl = "https://api.themoviedb.org/3/search/movie?api_key={$apiKey}&query=" . urlencode($cleanTitle) . "&year={$year}&language=fr-FR";
    $searchRes = httpGet($searchUrl, 8);
    if (!$searchRes) return null;
    
    $searchData = json_decode($searchRes, true);
    if (empty($searchData['results'])) return null;
    
    $movie = $searchData['results'][0];
    $movieId = $movie['id'];
    $poster = !empty($movie['poster_path']) ? "https://image.tmdb.org/t/p/w500" . $movie['poster_path'] : '';
    
    // Récupération Réalisateur
    $creditsUrl = "https://api.themoviedb.org/3/movie/{$movieId}/credits?api_key={$apiKey}&language=fr-FR";
    $creditsRes = httpGet($creditsUrl, 8);
    $director = '';
    if ($creditsRes) {
        $creditsData = json_decode($creditsRes, true);
        if (!empty($creditsData['crew'])) {
            foreach ($creditsData['crew'] as $crew) {
                if ($crew['job'] === 'Director') { $director = $crew['name']; break; }
            }
        }
    }
    
    // Récupération Streaming (France)
    $streaming = '';
    $watchUrl = "https://api.themoviedb.org/3/movie/{$movieId}/watch/providers?api_key={$apiKey}";
    $watchRes = httpGet($watchUrl, 8);
    if ($watchRes) {
        $watchData = json_decode($watchRes, true);
        $frProviders = $watchData['results']['FR'] ?? [];
        $platforms = [];
        if (!empty($frProviders['flatrate'])) { foreach ($frProviders['flatrate'] as $p) $platforms[] = $p['provider_name']; }
        if (empty($platforms)) {
            if (!empty($frProviders['rent'])) { foreach ($frProviders['rent'] as $p) $platforms[] = $p['provider_name'] . ' (loc.)'; }
            if (!empty($frProviders['buy'])) { foreach ($frProviders['buy'] as $p) $platforms[] = $p['provider_name'] . ' (achat)'; }
        }
        if (!empty($platforms)) $streaming = implode(', ', array_unique($platforms));
    }
    
    $result = ['director' => $director, 'poster' => $poster, 'streaming' => $streaming];
    
    // Sauvegarder dans le cache
    if ($pdo) {
        try {
            $stmt = $pdo->prepare("REPLACE INTO cache_images (cache_key, image_url, source, created_at) VALUES (?, ?, 'tmdb', ?)");
            $stmt->execute(['tmdb_' . $cacheKey, $poster, time()]);
            $stmt2 = $pdo->prepare("REPLACE INTO cache_images (cache_key, image_url, source, created_at) VALUES (?, ?, 'tmdb_full', ?)");
            $stmt2->execute(['tmdb_full_' . $cacheKey, json_encode($result), time()]);
        } catch (\Exception $e) { /* ignore */ }
    }
    
    return $result;
}

// ── Détection format ──
function detectFormat($title, $description = '') {
    $t = strtoupper($title . ' ' . $description);
    if (strpos($t, '4K') !== false || strpos($t, 'UHD') !== false) return 'Blu-ray 4K';
    if (strpos($t, 'BLU-RAY') !== false || strpos($t, 'BLURAY') !== false || strpos($t, 'BLU-RAY') !== false) return 'Blu-ray';
    if (strpos($t, 'DVD') !== false) return 'DVD';
    if (strpos($t, 'VHS') !== false) return 'VHS';
    if (strpos($t, 'COFFRET') !== false || strpos($t, 'TRILOGIE') !== false || strpos($t, 'INTEGRALE') !== false) return 'Coffret';
    return 'DVD';
}

function extractYear($dateStr) {
    if (preg_match('/(\d{4})/', $dateStr, $matches)) return $matches[1];
    return '';
}

// ── ROUTEUR PRINCIPAL ──
$action = $_GET['action'] ?? '';
$data = json_decode(file_get_contents('php://input'), true) ?? [];

switch ($action) {
    case 'check_security_status':
        $stmt = $pdo->query("SELECT COUNT(*) FROM users");
        echo json_encode(["is_blank" => ($stmt->fetchColumn() == 0)]);
        break;
        
    case 'login':
        $stmt = $pdo->query("SELECT COUNT(*) FROM users");
        if ($stmt->fetchColumn() == 0) { echo json_encode(["success" => true, "token" => md5(ENCRYPTION_KEY . 'session'), "blank" => true]); } 
        else {
            $stmt = $pdo->prepare("SELECT password_hash FROM users WHERE username = 'admin'");
            $stmt->execute(); $user = $stmt->fetch();
            if ($user && password_verify($data['password'] ?? '', $user['password_hash'])) { echo json_encode(["success" => true, "token" => md5(ENCRYPTION_KEY . 'session'), "blank" => false]); } 
            else { http_response_code(401); echo json_encode(["error" => "Mot de passe incorrect."]); }
        }
        break;
        
    case 'setup_admin': case 'update_password':
        checkAuth($pdo);
        $pwd = $data['password'] ?? $data['new_password'] ?? '';
        $stmt = $pdo->prepare("REPLACE INTO users (id, username, password_hash) VALUES (1, 'admin', :pass)");
        $stmt->execute([':pass' => password_hash($pwd, PASSWORD_BCRYPT)]);
        echo json_encode(["success" => true]);
        break;
        
    case 'save_config':
        checkAuth($pdo);
        $keyName = $data['key_name'] ?? ''; $keyValue = $data['key_value'] ?? '';
        if ($keyName === 'tmdb_api_key' && !empty($keyValue)) {
            $stmt = $pdo->prepare("REPLACE INTO config (key_name, key_value) VALUES (?, ?)");
            $stmt->execute([$keyName, encryptData($keyValue)]);
            echo json_encode(["success" => true]);
        } else { http_response_code(400); echo json_encode(["error" => "Données invalides."]); }
        break;
        
    case 'get_films':
        $crit = $pdo->query("SELECT *, 'critique' AS type FROM critiques ORDER BY id DESC")->fetchAll();
        $video = $pdo->query("SELECT *, 'videotheque' AS type FROM videotheque ORDER BY id DESC")->fetchAll();
        echo json_encode(array_merge($crit, $video));
        break;
        
    case 'save_film':
        checkAuth($pdo);
        $type = $data['type'] ?? 'critique';
        $id = !empty($data['id']) ? $data['id'] : makeStableId($data['title'] ?? '', $data['year'] ?? '0000');
        if (empty($data['director']) || empty($data['poster'])) {
            $tmdbData = fetchTmdbData($data['title'] ?? '', $data['year'] ?? '', getTmdbApiKey($pdo), $pdo);
            if ($tmdbData) {
                if (empty($data['director'])) $data['director'] = $tmdbData['director'];
                if (empty($data['poster'])) $data['poster'] = $tmdbData['poster'];
            }
        }
        if ($type === 'critique') {
            $sql = "INSERT INTO critiques (id, title, year, director, poster, rating, review, streaming) VALUES (?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE title=VALUES(title), year=VALUES(year), director=VALUES(director), poster=VALUES(poster), rating=VALUES(rating), review=VALUES(review), streaming=VALUES(streaming)";
            $stmt = $pdo->prepare($sql);
            $stmt->execute([$id, $data['title'] ?? '', $data['year'] ?? '', $data['director'] ?? '', $data['poster'] ?? '', $data['rating'] ?? 3.0, $data['review'] ?? '', $data['streaming'] ?? '']);
        } else {
            $sql = "INSERT INTO videotheque (id, title, year, director, poster, format, length, publisher, ean_isbn13, number_of_discs, aspect_ratio, description) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE title=VALUES(title), year=VALUES(year), director=VALUES(director), poster=VALUES(poster), format=VALUES(format), length=VALUES(length), publisher=VALUES(publisher), ean_isbn13=VALUES(ean_isbn13), number_of_discs=VALUES(number_of_discs), aspect_ratio=VALUES(aspect_ratio), description=VALUES(description)";
            $stmt = $pdo->prepare($sql);
            $stmt->execute([$id, $data['title'] ?? '', $data['year'] ?? '', $data['director'] ?? '', $data['poster'] ?? '', $data['format'] ?? '', $data['length'] ?? '', $data['publisher'] ?? '', $data['ean_isbn13'] ?? '', $data['number_of_discs'] ?? 1, $data['aspect_ratio'] ?? '', $data['description'] ?? '']);
        }
        echo json_encode(["success" => true]);
        break;
        
    case 'delete_film':
        checkAuth($pdo);
        $type = $_GET['type'] ?? 'critique'; $table = ($type === 'videotheque') ? 'videotheque' : 'critiques';
        $id = $_GET['id'] ?? null;
        if (!$id) { http_response_code(400); echo json_encode(["error" => "ID manquant."]); break; }
        $stmt = $pdo->prepare("DELETE FROM $table WHERE id = ?"); $stmt->execute([$id]);
        echo json_encode(["success" => true]);
        break;
        
    case 'bulk_delete':
        checkAuth($pdo);
        $ids = $data['ids'] ?? []; $type = $data['type'] ?? 'critique'; $table = ($type === 'videotheque') ? 'videotheque' : 'critiques';
        if (!empty($ids)) { $placeholders = implode(',', array_fill(0, count($ids), '?')); $stmt = $pdo->prepare("DELETE FROM $table WHERE id IN ($placeholders)"); $stmt->execute($ids); echo json_encode(["success" => true]); } 
        else { http_response_code(400); echo json_encode(["success" => false, "error" => "Aucun élément sélectionné."]); }
        break;

    // ──  IMPORT PAR LOTS AVEC RÉCUPÉRATION JAQUETTES ─
    case 'import_batch':
        checkAuth($pdo);
        $items = $data['items'] ?? [];
        $type = $data['type'] ?? 'videotheque';
        $tmdbApiKey = getTmdbApiKey($pdo);
        $imported = 0;
        $stats = ['ean_hits' => 0, 'tmdb_hits' => 0, 'no_image' => 0];

        $pdo->beginTransaction();
        
        foreach ($items as $rowData) {
            // ── MAPPING EXACT DES COLONNES DE VOTRE CSV ──
            $title = $rowData['title'] ?? $rowData['Name'] ?? 'Sans titre';
            $firstName = $rowData['first_name'] ?? '';
            $lastName = $rowData['last_name'] ?? '';
            $creators = $rowData['creators'] ?? '';
            
            // Réalisateur : priorité first_name + last_name, sinon creators
            $director = '';
            if (!empty($firstName) && !empty($lastName)) {
                $director = trim("$firstName $lastName");
            } elseif (!empty($creators)) {
                $director = $creators;
            }
            
            // Année depuis publish_date
            $publishDate = $rowData['publish_date'] ?? $rowData['Year'] ?? $rowData['year'] ?? '';
            $year = extractYear($publishDate);
            
            $ean = $rowData['ean_isbn13'] ?? $rowData['EAN'] ?? $rowData['ean'] ?? '';
            $description = $rowData['description'] ?? $rowData['Description'] ?? '';
            $publisher = $rowData['publisher'] ?? $rowData['Publisher'] ?? '';
            $length = $rowData['length'] ?? $rowData['Length'] ?? '';
            $discs = $rowData['number_of_discs'] ?? $rowData['Number of Discs'] ?? 1;
            $aspect = $rowData['aspect_ratio'] ?? $rowData['Aspect Ratio'] ?? '';
            $format = $rowData['format'] ?? $rowData['Format'] ?? detectFormat($title, $description);

            // ──  RÉCUPÉRATION IMAGE : PRIORITÉ EAN (jaquette physique) ──
            $poster = $rowData['poster'] ?? $rowData['Poster'] ?? $rowData['image'] ?? '';
            $imageSource = 'none';
            
            if (empty($poster) && !empty($ean)) {
                $eanImage = fetchImageByEAN($ean, $pdo);
                if ($eanImage) {
                    $poster = $eanImage;
                    $imageSource = 'ean';
                    $stats['ean_hits']++;
                }
            }
            
            // ── FALLBACK TMDB (affiche du film) ──
            if (empty($poster) && $tmdbApiKey) {
                $tmdbData = fetchTmdbData($title, $year, $tmdbApiKey, $pdo);
                if ($tmdbData) {
                    if (empty($director)) $director = $tmdbData['director'];
                    if (!empty($tmdbData['poster'])) {
                        $poster = $tmdbData['poster'];
                        $imageSource = 'tmdb';
                        $stats['tmdb_hits']++;
                    }
                }
            }
            
            if (empty($poster)) $stats['no_image']++;

            $id = makeStableId($title, $year);

            if ($type === 'critique') {
                $rating = isset($rowData['rating']) && $rowData['rating'] !== '' ? (float)$rowData['rating'] : (isset($rowData['Rating']) ? (float)$rowData['Rating'] : 3.0);
                $review = $rowData['review'] ?? $rowData['Review'] ?? $description;
                $streaming = $rowData['streaming'] ?? $rowData['Streaming'] ?? (!empty($tmdbData['streaming']) ? $tmdbData['streaming'] : 'Disponible en support physique ou Cinéma');
                
                $sql = "INSERT INTO critiques (id, title, year, director, poster, rating, review, streaming) VALUES (?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE rating=VALUES(rating), review=IF(VALUES(review)!='',VALUES(review),review), director=IF(VALUES(director)!='',VALUES(director),director), poster=IF(VALUES(poster)!='',VALUES(poster),poster), streaming=IF(VALUES(streaming)!='',VALUES(streaming),streaming)";
                $stmt = $pdo->prepare($sql);
                $stmt->execute([$id, $title, $year, $director, $poster, $rating, $review, $streaming]);
            } else {
                $sql = "INSERT INTO videotheque (id, title, year, director, poster, format, length, publisher, ean_isbn13, number_of_discs, aspect_ratio, description) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE director=IF(VALUES(director)!='',VALUES(director),director), poster=IF(VALUES(poster)!='',VALUES(poster),poster), format=IF(VALUES(format)!='',VALUES(format),format), length=IF(VALUES(length)!='',VALUES(length),length), publisher=IF(VALUES(publisher)!='',VALUES(publisher),publisher), ean_isbn13=IF(VALUES(ean_isbn13)!='',VALUES(ean_isbn13),ean_isbn13), number_of_discs=IF(VALUES(number_of_discs)!=1,VALUES(number_of_discs),number_of_discs), aspect_ratio=IF(VALUES(aspect_ratio)!='',VALUES(aspect_ratio),aspect_ratio), description=IF(VALUES(description)!='',VALUES(description),description)";
                $stmt = $pdo->prepare($sql);
                $stmt->execute([$id, $title, $year, $director, $poster, $format, $length, $publisher, $ean, $discs, $aspect, $description]);
            }
            $imported++;
        }
        
        $pdo->commit();
        echo json_encode(["success" => true, "imported" => $imported, "stats" => $stats]);
        break;
}