// food_delivery_service.dart — طبقة الاتصال بـ backend/food (جهة السائق/الموصّل)
import '../functions/crud.dart';
import '../../constant/links.dart';
import 'food_delivery_models.dart';

class FoodDeliveryApiResult<T> {
  final bool success;
  final T? data;
  final String message;
  FoodDeliveryApiResult(this.success, this.data, this.message);
}

class FoodDeliveryService {
  static String get _base => '${AppLink.server}/food';

  static Future<FoodDeliveryApiResult<bool>> toggleAvailability(bool enabled) async {
    final res = await CRUD().post(
      link: '$_base/courier/toggle_availability.php',
      payload: {'enabled': enabled.toString()},
    );
    if (res is Map && res['status'] == 'success') return FoodDeliveryApiResult(true, enabled, 'ok');
    return FoodDeliveryApiResult(false, null, _errMsg(res));
  }

  static Future<FoodDeliveryApiResult<List<FoodDeliveryTask>>> getActiveTasks() async {
    final res = await CRUD().post(link: '$_base/courier/active.php');
    if (res is Map && res['status'] == 'success') {
      final msg = res['message'];
      final list = (msg is Map && msg['orders'] is List)
          ? (msg['orders'] as List)
              .map((o) => FoodDeliveryTask.fromJson(Map<String, dynamic>.from(o)))
              .toList()
          : <FoodDeliveryTask>[];
      return FoodDeliveryApiResult(true, list, 'ok');
    }
    return FoodDeliveryApiResult(false, null, _errMsg(res));
  }

  static Future<FoodDeliveryApiResult<List<FoodDeliveryOffer>>> getPendingOffers() async {
    final res = await CRUD().post(link: '$_base/courier/pending_offers.php');
    if (res is Map && res['status'] == 'success') {
      final msg = res['message'];
      final list = (msg is Map && msg['offers'] is List)
          ? (msg['offers'] as List)
              .map((o) => FoodDeliveryOffer.fromJson(Map<String, dynamic>.from(o)))
              .toList()
          : <FoodDeliveryOffer>[];
      return FoodDeliveryApiResult(true, list, 'ok');
    }
    return FoodDeliveryApiResult(false, null, _errMsg(res));
  }

  static Future<FoodDeliveryApiResult<String>> respondToOffer(int orderId, bool accept) async {
    final res = await CRUD().post(
      link: '$_base/courier/offer_respond.php',
      payload: {'order_id': orderId.toString(), 'response': accept ? 'accept' : 'reject'},
    );
    if (res is Map && res['status'] == 'success') {
      final msg = res['message'];
      return FoodDeliveryApiResult(true, (msg is Map ? msg['response']?.toString() : null) ?? '', 'ok');
    }
    return FoodDeliveryApiResult(false, null, _errMsg(res));
  }

  static Future<FoodDeliveryApiResult<void>> markPickedUp(int orderId) async {
    final res = await CRUD().post(
      link: '$_base/courier/picked_up.php',
      payload: {'order_id': orderId.toString()},
    );
    if (res is Map && res['status'] == 'success') return FoodDeliveryApiResult(true, null, 'ok');
    return FoodDeliveryApiResult(false, null, _errMsg(res));
  }

  static Future<FoodDeliveryApiResult<void>> markDelivered(int orderId) async {
    final res = await CRUD().post(
      link: '$_base/courier/delivered.php',
      payload: {'order_id': orderId.toString()},
    );
    if (res is Map && res['status'] == 'success') return FoodDeliveryApiResult(true, null, 'ok');
    return FoodDeliveryApiResult(false, null, _errMsg(res));
  }

  static String _errMsg(dynamic res) {
    if (res == 'no_internet') return 'تحقق من اتصالك بالإنترنت';
    if (res == 'token_expired') return 'انتهت الجلسة، حاول مجدداً';
    if (res is Map && res['message'] is String) return res['message'];
    return 'حدث خطأ، حاول مجدداً';
  }
}