// food_models.dart — نماذج بيانات وحدة الطعام (جهة الراكب)

class FoodMerchant {
  final int id;
  final String nameAr;
  final String? nameEn;
  final String? logoUrl;
  final String? coverUrl;
  final String? descriptionAr;
  final String city;
  final String? address;
  final String? category;
  final int minOrderAmount;
  final int avgPrepMinutes;
  final double ratingAvg;
  final int ratingCount;
  final bool isOpen;

  FoodMerchant({
    required this.id,
    required this.nameAr,
    required this.city,
    this.nameEn,
    this.logoUrl,
    this.coverUrl,
    this.descriptionAr,
    this.address,
    this.category,
    this.minOrderAmount = 0,
    this.avgPrepMinutes = 20,
    this.ratingAvg = 0,
    this.ratingCount = 0,
    this.isOpen = true,
  });

  factory FoodMerchant.fromJson(Map<String, dynamic> j) => FoodMerchant(
        id: int.tryParse(j['id'].toString()) ?? 0,
        nameAr: j['name_ar']?.toString() ?? '',
        nameEn: j['name_en']?.toString(),
        logoUrl: j['logo_url']?.toString(),
        coverUrl: j['cover_url']?.toString(),
        descriptionAr: j['description_ar']?.toString(),
        city: j['city']?.toString() ?? '',
        address: j['address']?.toString(),
        category: j['category']?.toString(),
        minOrderAmount: int.tryParse(j['min_order_amount']?.toString() ?? '0') ?? 0,
        avgPrepMinutes: int.tryParse(j['avg_prep_minutes']?.toString() ?? '20') ?? 20,
        ratingAvg: double.tryParse(j['rating_avg']?.toString() ?? '0') ?? 0,
        ratingCount: int.tryParse(j['rating_count']?.toString() ?? '0') ?? 0,
        isOpen: j['is_open'] == true || j['is_open']?.toString() == '1',
      );
}

class FoodOptionChoice {
  final String id;
  final String labelAr;
  final int price;

  FoodOptionChoice({required this.id, required this.labelAr, required this.price});

  factory FoodOptionChoice.fromJson(Map<String, dynamic> j) => FoodOptionChoice(
        id: j['id'].toString(),
        labelAr: j['label_ar']?.toString() ?? '',
        price: int.tryParse(j['price']?.toString() ?? '0') ?? 0,
      );
}

class FoodItemOptionGroup {
  final int id;
  final String groupNameAr;
  final bool isRequired;
  final int maxSelect;
  final List<FoodOptionChoice> choices;

  FoodItemOptionGroup({
    required this.id,
    required this.groupNameAr,
    required this.isRequired,
    required this.maxSelect,
    required this.choices,
  });

  factory FoodItemOptionGroup.fromJson(Map<String, dynamic> j) => FoodItemOptionGroup(
        id: int.tryParse(j['id'].toString()) ?? 0,
        groupNameAr: j['group_name_ar']?.toString() ?? '',
        isRequired: j['is_required']?.toString() == '1' || j['is_required'] == true,
        maxSelect: int.tryParse(j['max_select']?.toString() ?? '1') ?? 1,
        choices: (j['choices'] is List)
            ? (j['choices'] as List)
                .map((c) => FoodOptionChoice.fromJson(Map<String, dynamic>.from(c)))
                .toList()
            : <FoodOptionChoice>[],
      );
}

class FoodMenuItem {
  final int id;
  final int categoryId;
  final String nameAr;
  final String? nameEn;
  final String? descriptionAr;
  final String? imageUrl;
  final int price;
  final bool isAvailable;
  final List<FoodItemOptionGroup> options;

  FoodMenuItem({
    required this.id,
    required this.categoryId,
    required this.nameAr,
    required this.price,
    this.nameEn,
    this.descriptionAr,
    this.imageUrl,
    this.isAvailable = true,
    this.options = const [],
  });

  factory FoodMenuItem.fromJson(Map<String, dynamic> j) => FoodMenuItem(
        id: int.tryParse(j['id'].toString()) ?? 0,
        categoryId: int.tryParse(j['category_id'].toString()) ?? 0,
        nameAr: j['name_ar']?.toString() ?? '',
        nameEn: j['name_en']?.toString(),
        descriptionAr: j['description_ar']?.toString(),
        imageUrl: j['image_url']?.toString(),
        price: int.tryParse(j['price']?.toString() ?? '0') ?? 0,
        isAvailable: j['is_available']?.toString() != '0' && j['is_available'] != false,
        options: (j['options'] is List)
            ? (j['options'] as List)
                .map((o) => FoodItemOptionGroup.fromJson(Map<String, dynamic>.from(o)))
                .toList()
            : <FoodItemOptionGroup>[],
      );
}

class FoodMenuCategory {
  final int id;
  final String nameAr;
  final String? nameEn;
  final List<FoodMenuItem> items;

  FoodMenuCategory({
    required this.id,
    required this.nameAr,
    this.nameEn,
    this.items = const [],
  });

  factory FoodMenuCategory.fromJson(Map<String, dynamic> j) => FoodMenuCategory(
        id: int.tryParse(j['id'].toString()) ?? 0,
        nameAr: j['name_ar']?.toString() ?? '',
        nameEn: j['name_en']?.toString(),
        items: (j['items'] is List)
            ? (j['items'] as List)
                .map((i) => FoodMenuItem.fromJson(Map<String, dynamic>.from(i)))
                .toList()
            : <FoodMenuItem>[],
      );
}

// ── سطر في السلة (محلي فقط قبل الإرسال للخادم) ──
class FoodCartLine {
  final FoodMenuItem item;
  int quantity;
  // key: option_group_id, value: قائمة choice_id المختارة
  final Map<int, List<String>> selectedOptions;

  FoodCartLine({
    required this.item,
    this.quantity = 1,
    Map<int, List<String>>? selectedOptions,
  }) : selectedOptions = selectedOptions ?? {};

  int get unitPrice {
    int total = item.price;
    for (final group in item.options) {
      final chosen = selectedOptions[group.id] ?? [];
      for (final choiceId in chosen) {
        final choice = group.choices.firstWhere(
          (c) => c.id == choiceId,
          orElse: () => FoodOptionChoice(id: '', labelAr: '', price: 0),
        );
        total += choice.price;
      }
    }
    return total;
  }

  int get lineTotal => unitPrice * quantity;

  Map<String, dynamic> toQuotePayload() => {
        'item_id': item.id,
        'quantity': quantity,
        'options': selectedOptions.entries
            .map((e) => {'option_group_id': e.key, 'choice_ids': e.value})
            .toList(),
      };

  // مفتاح تمييز محلي: نفس الصنف بخيارات مختلفة = سطر مختلف في السلة
  String get lineKey {
    final optKeys = selectedOptions.entries.map((e) => '${e.key}:${e.value.join(",")}').join('|');
    return '${item.id}_$optKeys';
  }
}

class FoodQuote {
  final String quoteToken;
  final int itemsTotal;
  final int deliveryFee;
  final int serviceFee;
  final int grandTotal;
  final int expiresIn;

  FoodQuote({
    required this.quoteToken,
    required this.itemsTotal,
    required this.deliveryFee,
    required this.serviceFee,
    required this.grandTotal,
    required this.expiresIn,
  });

  factory FoodQuote.fromJson(Map<String, dynamic> j) => FoodQuote(
        quoteToken: j['quote_token']?.toString() ?? '',
        itemsTotal: int.tryParse(j['items_total']?.toString() ?? '0') ?? 0,
        deliveryFee: int.tryParse(j['delivery_fee']?.toString() ?? '0') ?? 0,
        serviceFee: int.tryParse(j['service_fee']?.toString() ?? '0') ?? 0,
        grandTotal: int.tryParse(j['grand_total']?.toString() ?? '0') ?? 0,
        expiresIn: int.tryParse(j['expires_in']?.toString() ?? '600') ?? 600,
      );
}

class FoodOrderItemLine {
  final String nameArSnapshot;
  final int unitPrice;
  final int quantity;
  final int lineTotal;

  FoodOrderItemLine({
    required this.nameArSnapshot,
    required this.unitPrice,
    required this.quantity,
    required this.lineTotal,
  });

  factory FoodOrderItemLine.fromJson(Map<String, dynamic> j) => FoodOrderItemLine(
        nameArSnapshot: j['name_ar_snapshot']?.toString() ?? '',
        unitPrice: int.tryParse(j['unit_price']?.toString() ?? '0') ?? 0,
        quantity: int.tryParse(j['quantity']?.toString() ?? '1') ?? 1,
        lineTotal: int.tryParse(j['line_total']?.toString() ?? '0') ?? 0,
      );
}

class FoodOrder {
  final int id;
  final String status;
  final int itemsTotal;
  final int deliveryFee;
  final int grandTotal;
  final String? deliveryAddress;
  final int? rating;
  final DateTime? createdAt;
  final DateTime? deliveredAt;
  final String? merchantNameAr;
  final String? merchantLogoUrl;
  final List<FoodOrderItemLine> items;

  FoodOrder({
    required this.id,
    required this.status,
    required this.itemsTotal,
    required this.deliveryFee,
    required this.grandTotal,
    this.deliveryAddress,
    this.rating,
    this.createdAt,
    this.deliveredAt,
    this.merchantNameAr,
    this.merchantLogoUrl,
    this.items = const [],
  });

  factory FoodOrder.fromJson(Map<String, dynamic> j) => FoodOrder(
        id: int.tryParse(j['id'].toString()) ?? 0,
        status: j['status']?.toString() ?? 'pending',
        itemsTotal: int.tryParse(j['items_total']?.toString() ?? '0') ?? 0,
        deliveryFee: int.tryParse(j['delivery_fee']?.toString() ?? '0') ?? 0,
        grandTotal: int.tryParse(j['grand_total']?.toString() ?? '0') ?? 0,
        deliveryAddress: j['delivery_address']?.toString(),
        rating: j['rating'] == null ? null : int.tryParse(j['rating'].toString()),
        createdAt: DateTime.tryParse(j['created_at']?.toString() ?? ''),
        deliveredAt: j['delivered_at'] == null ? null : DateTime.tryParse(j['delivered_at'].toString()),
        merchantNameAr: j['merchant_name_ar']?.toString(),
        merchantLogoUrl: j['merchant_logo_url']?.toString(),
        items: (j['items'] is List)
            ? (j['items'] as List)
                .map((i) => FoodOrderItemLine.fromJson(Map<String, dynamic>.from(i)))
                .toList()
            : <FoodOrderItemLine>[],
      );
}

// ترتيب حالات الطلب لعرض خط زمني تصاعدي في شاشة التتبع
const List<String> foodOrderStatusFlow = [
  'pending',
  'merchant_accepted',
  'preparing',
  'ready',
  'courier_assigned',
  'picked_up',
  'delivered',
];

bool foodOrderIsCancelled(String status) =>
    status.startsWith('cancelled') || status == 'rejected';

// المبالغ في backend/food مخزّنة بأصغر وحدة نقدية (fils) — العامل هنا يطابق
// FOOD_CURRENCY_DIVISOR الافتراضي في docker/.env.example (1000). إن غُيّر
// هناك يجب تغييره هنا أيضاً — القيمتان يجب أن تبقيا متطابقتين دائماً.
const int foodCurrencyDivisor = 1000;

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