// food_delivery_models.dart — نماذج بيانات وحدة التوصيل (جهة السائق)

class FoodDeliveryTask {
  final int id;
  final String status; // courier_assigned | picked_up
  final int merchantId;
  final String merchantNameAr;
  final double? merchantLat;
  final double? merchantLng;
  final String? merchantAddress;
  final int deliveryFee;
  final String? deliveryAddress;
  final double deliveryLat;
  final double deliveryLng;
  final DateTime? createdAt;

  FoodDeliveryTask({
    required this.id,
    required this.status,
    required this.merchantId,
    required this.merchantNameAr,
    required this.deliveryFee,
    required this.deliveryLat,
    required this.deliveryLng,
    this.merchantLat,
    this.merchantLng,
    this.merchantAddress,
    this.deliveryAddress,
    this.createdAt,
  });

  factory FoodDeliveryTask.fromJson(Map<String, dynamic> j) => FoodDeliveryTask(
        id: int.tryParse(j['id'].toString()) ?? 0,
        status: j['status']?.toString() ?? '',
        merchantId: int.tryParse(j['merchant_id'].toString()) ?? 0,
        merchantNameAr: j['merchant_name_ar']?.toString() ?? '',
        merchantLat: double.tryParse(j['merchant_lat']?.toString() ?? ''),
        merchantLng: double.tryParse(j['merchant_lng']?.toString() ?? ''),
        merchantAddress: j['merchant_address']?.toString(),
        deliveryFee: int.tryParse(j['delivery_fee']?.toString() ?? '0') ?? 0,
        deliveryAddress: j['delivery_address']?.toString(),
        deliveryLat: double.tryParse(j['delivery_lat']?.toString() ?? '0') ?? 0,
        deliveryLng: double.tryParse(j['delivery_lng']?.toString() ?? '0') ?? 0,
        createdAt: DateTime.tryParse(j['created_at']?.toString() ?? ''),
      );
}

// عرض توصيل وارد — من polling على food/courier/pending_offers.php
class FoodDeliveryOffer {
  final int orderId;
  final int merchantId;
  final String merchantNameAr;
  final double? merchantLat;
  final double? merchantLng;
  final int deliveryFee;
  final DateTime? offeredAt;

  FoodDeliveryOffer({
    required this.orderId,
    required this.merchantId,
    required this.merchantNameAr,
    required this.deliveryFee,
    this.merchantLat,
    this.merchantLng,
    this.offeredAt,
  });

  factory FoodDeliveryOffer.fromJson(Map<String, dynamic> j) => FoodDeliveryOffer(
        orderId: int.tryParse(j['order_id'].toString()) ?? 0,
        merchantId: int.tryParse(j['merchant_id'].toString()) ?? 0,
        merchantNameAr: j['merchant_name_ar']?.toString() ?? '',
        merchantLat: double.tryParse(j['merchant_lat']?.toString() ?? ''),
        merchantLng: double.tryParse(j['merchant_lng']?.toString() ?? ''),
        deliveryFee: int.tryParse(j['delivery_fee']?.toString() ?? '0') ?? 0,
        offeredAt: DateTime.tryParse(j['offered_at']?.toString() ?? ''),
      );

  // مهلة العرض 20 ثانية من الخادم (SET NX EX 20) — عدّاد تقريبي للعرض فقط،
  // الخادم هو الحكم الفعلي (رفض offer_respond إن انتهت المهلة فعلاً).
  int get secondsRemaining {
    if (offeredAt == null) return 20;
    final elapsed = DateTime.now().difference(offeredAt!).inSeconds;
    return (20 - elapsed).clamp(0, 20);
  }
}

const int foodCurrencyDivisor = 1000;

String foodFormatPrice(int smallestUnit, {String currencySymbol = 'د.أ'}) {
  final decimal = smallestUnit / foodCurrencyDivisor;
  return '${decimal.toStringAsFixed(3)} $currencySymbol';
}