import 'recipe.dart';

class MenuPlan {
  final String id;
  final String weekStart;
  final List<MenuDay> days;

  const MenuPlan({
    required this.id,
    required this.weekStart,
    required this.days,
  });

  factory MenuPlan.fromJson(Map<String, dynamic> json) {
    return MenuPlan(
      id: json['id'] as String? ?? '',
      weekStart: json['week_start'] as String? ?? '',
      days: (json['days'] as List<dynamic>? ?? [])
          .map((e) => MenuDay.fromJson(e as Map<String, dynamic>))
          .toList(),
    );
  }
}

class MenuDay {
  final int day;
  final String date;
  final List<MealSlot> meals;
  final double totalCalories;

  const MenuDay({
    required this.day,
    required this.date,
    required this.meals,
    required this.totalCalories,
  });

  factory MenuDay.fromJson(Map<String, dynamic> json) {
    return MenuDay(
      day: json['day'] as int? ?? 0,
      date: json['date'] as String? ?? '',
      meals: (json['meals'] as List<dynamic>? ?? [])
          .map((e) => MealSlot.fromJson(e as Map<String, dynamic>))
          .toList(),
      totalCalories: (json['total_calories'] as num?)?.toDouble() ?? 0,
    );
  }

  // Localized day name.
  String get dayName {
    const names = [
      'Понедельник',
      'Вторник',
      'Среда',
      'Четверг',
      'Пятница',
      'Суббота',
      'Воскресенье',
    ];
    final i = day - 1;
    return (i >= 0 && i < names.length) ? names[i] : 'День $day';
  }

  // Short date label like "16 фев".
  String get shortDate {
    try {
      final dt = DateTime.parse(date);
      const months = [
        'янв', 'фев', 'мар', 'апр', 'май', 'июн',
        'июл', 'авг', 'сен', 'окт', 'ноя', 'дек',
      ];
      return '${dt.day} ${months[dt.month - 1]}';
    } catch (_) {
      return date;
    }
  }
}

class MealSlot {
  final String id;
  final String mealType;
  final MenuRecipe? recipe;

  const MealSlot({
    required this.id,
    required this.mealType,
    this.recipe,
  });

  factory MealSlot.fromJson(Map<String, dynamic> json) {
    return MealSlot(
      id: json['id'] as String? ?? '',
      mealType: json['meal_type'] as String? ?? '',
      recipe: json['recipe'] != null
          ? MenuRecipe.fromJson(json['recipe'] as Map<String, dynamic>)
          : null,
    );
  }

  String get mealLabel {
    switch (mealType) {
      case 'breakfast':
        return 'Завтрак';
      case 'lunch':
        return 'Обед';
      case 'dinner':
        return 'Ужин';
      default:
        return mealType;
    }
  }

  String get mealEmoji {
    switch (mealType) {
      case 'breakfast':
        return '🌅';
      case 'lunch':
        return '☀️';
      case 'dinner':
        return '🌙';
      default:
        return '🍽️';
    }
  }
}

class MenuRecipe {
  final String id;
  final String title;
  final String imageUrl;
  final NutritionInfo? nutrition;

  const MenuRecipe({
    required this.id,
    required this.title,
    required this.imageUrl,
    this.nutrition,
  });

  factory MenuRecipe.fromJson(Map<String, dynamic> json) {
    return MenuRecipe(
      id: json['id'] as String? ?? '',
      title: json['title'] as String? ?? '',
      imageUrl: json['image_url'] as String? ?? '',
      nutrition: json['nutrition_per_serving'] != null
          ? NutritionInfo.fromJson(
              json['nutrition_per_serving'] as Map<String, dynamic>)
          : null,
    );
  }
}