// lib/data/models/offer_model.dart

import 'package:equatable/equatable.dart';
import 'package:proxibuy/data/models/comment_model.dart';
import 'package:proxibuy/data/models/discount_info_model.dart';
import 'package:proxibuy/data/models/working_hours.dart';

// کلاس کمکی برای داده‌های فروشگاه
class ShopData {
  final String id;
  final String name;
  final String category;
  final String address;
  final double latitude;
  final double longitude;
  final List<String> properties;

  const ShopData({
    required this.id,
    required this.name,
    required this.category,
    required this.address,
    required this.latitude,
    required this.longitude,
    required this.properties,
  });

  factory ShopData.fromJson(Map<String, dynamic> json) {
    return ShopData(
      id: json['_id'] ?? '',
      name: json['Name'] ?? 'نام فروشگاه نامشخص',
      category: json['Category'] ?? 'بدون دسته‌بندی',
      address: json['Address'] ?? 'آدرس نامشخص',
      latitude: (json['Map']['coordinates'][1] as num?)?.toDouble() ?? 0.0,
      longitude: (json['Map']['coordinates'][0] as num?)?.toDouble() ?? 0.0,
      properties: List<String>.from(json['Property'] ?? []),
    );
  }
}

class OfferModel extends Equatable {
  final String id;
  final String storeName;
  final String title;
  final String discount;
  final List<String> imageUrls;
  final String category;
  final int distanceInMeters;
  final DateTime expiryTime;
  final String address;
  final List<WorkingHours> workingHours;
  final String discountType;
  final bool isOpen;
  final double rating;
  final int ratingCount;
  final double latitude;
  final double longitude;
  final double originalPrice;
  final double finalPrice;
  final List<String> features;
  final DiscountInfoModel? discountInfo;
  final List<CommentModel> comments;
  final String qrCodeData;

  const OfferModel({
    required this.id,
    required this.storeName,
    required this.title,
    required this.discount,
    required this.imageUrls,
    required this.category,
    required this.distanceInMeters,
    required this.expiryTime,
    required this.address,
    required this.workingHours,
    required this.discountType,
    required this.isOpen,
    required this.rating,
    required this.ratingCount,
    required this.latitude,
    required this.longitude,
    required this.originalPrice,
    required this.finalPrice,
    this.features = const [],
    this.discountInfo,
    this.comments = const [],
    required this.qrCodeData,
  });

  factory OfferModel.fromJson(Map<String, dynamic> json) { // <-- پارامتر calculatedDistance حذف شد
    final shopData = ShopData.fromJson(json['shopData']);
    
    final now = DateTime.now();
    bool checkIsOpen = false;
    try {
      final startTimeParts = (json['StartTime'] as String).split(':');
      final endTimeParts = (json['EndTime'] as String).split(':');
      final startHour = int.parse(startTimeParts[0]);
      final startMinute = int.parse(startTimeParts[1]);
      final endHour = int.parse(endTimeParts[0]);
      final endMinute = int.parse(endTimeParts[1]);

      final startTime = DateTime(now.year, now.month, now.day, startHour, startMinute);
      final endTime = DateTime(now.year, now.month, now.day, endHour, endMinute);

      checkIsOpen = now.isAfter(startTime) && now.isBefore(endTime);
    } catch(e) {
      checkIsOpen = false;
    }

    final originalPriceValue = (json['Price'] as num?)?.toDouble() ?? 0.0;
    final finalPriceValue = (json['NPrice'] as num?)?.toDouble() ?? 0.0;
    
    // **رفع خطا: تبدیل امن عدد فاصله به int**
    final distanceFromServer = (json['distance'] as num?)?.round() ?? 0;


    return OfferModel(
      id: json['ID'] ?? '',
      title: json['Name'] ?? 'بدون عنوان',
      discount: json['Description'] ?? '',
      imageUrls: (json['Images'] as List<dynamic>?)
          ?.map((imgId) => "$imgId") 
          .toList() ?? [],
      category: json['shopData']['Category']?.toString() ?? 'بدون دسته‌بندی',
      expiryTime: DateTime.tryParse(json['EndDate'] ?? '') ?? DateTime.now().add(const Duration(days: 1)),
      discountType: json['Type']?.toString() ?? '',
      originalPrice: originalPriceValue,
      finalPrice: finalPriceValue,
      qrCodeData: json['QRcode'] ?? '',
      storeName: shopData.name,
      address: shopData.address,
      latitude: shopData.latitude,
      longitude: shopData.longitude,
      features: shopData.properties,
      distanceInMeters: distanceFromServer, // <-- **استفاده از مسافت سرور**
      isOpen: checkIsOpen,
      workingHours: [],
      rating: 0.0,
      ratingCount: 0,
      comments: [],
      discountInfo: null,
    );
  }


  OfferModel copyWith() {
    return OfferModel(
      id: id,
      storeName: storeName,
      title: title,
      discount: discount,
      imageUrls: imageUrls,
      category: category,
      distanceInMeters: distanceInMeters,
      expiryTime: expiryTime,
      address: address,
      workingHours: workingHours,
      discountType: discountType,
      isOpen: isOpen,
      rating: rating,
      ratingCount: ratingCount,
      latitude: latitude,
      longitude: longitude,
      originalPrice: originalPrice,
      finalPrice: finalPrice,
      features: features,
      discountInfo: discountInfo,
      comments: comments,
      qrCodeData: qrCodeData,
    );
  }

  String get coverImageUrl =>
      imageUrls.isNotEmpty ? imageUrls.first : 'https://via.placeholder.com/400x200.png?text=No+Image';

  @override
  List<Object?> get props => [id];
  
  String get distanceAsString {
    if (distanceInMeters < 1000) {
      return "$distanceInMeters متر";
    } else {
      final distanceInKm = (distanceInMeters / 1000).toStringAsFixed(1);
      return "$distanceInKm کیلومتر";
    }
  }
}