import '../../../nutrition/domain/entities/meal_type.dart';

/// One slot of the weekly meal plan: a calendar day plus a meal slot
/// (breakfast, lunch, dinner, snack) that either references a saved [Recipe]
/// by id or carries a free-text description.
///
/// Pure Dart (no framework imports). The meal vocabulary reuses the
/// nutrition feature's [MealType] so planner slots and food-diary entries
/// stay aligned across bounded contexts.
class MealPlanSlot {
  const MealPlanSlot({
    required this.id,
    required this.date,
    required this.mealType,
    this.recipeId,
    this.customDescription,
    this.isPrepared = false,
  });

  /// UUID primary key assigned when the slot is first created.
  final String id;

  /// Calendar day the slot belongs to (stored at local start-of-day).
  final DateTime date;

  /// Meal slot within the day.
  final MealType mealType;

  /// Saved recipe assigned to this slot; `null` for custom entries.
  final String? recipeId;

  /// Free-text meal description for custom entries (or a note alongside an
  /// assigned recipe).
  final String? customDescription;

  /// Whether the meal has been prepared / logged as done.
  final bool isPrepared;

  /// `true` when the slot renders as an empty cell (no recipe and no text).
  bool get isEmpty =>
      recipeId == null && (customDescription ?? '').trim().isEmpty;

  MealPlanSlot copyWith({
    String? id,
    DateTime? date,
    MealType? mealType,
    String? recipeId,
    String? customDescription,
    bool? isPrepared,
  }) =>
      MealPlanSlot(
        id: id ?? this.id,
        date: date ?? this.date,
        mealType: mealType ?? this.mealType,
        recipeId: recipeId ?? this.recipeId,
        customDescription: customDescription ?? this.customDescription,
        isPrepared: isPrepared ?? this.isPrepared,
      );

  @override
  String toString() => 'MealPlanSlot($id, ${date.year}-${date.month}-'
      '${date.day} ${mealType.name}, recipe: ${recipeId ?? '-'})';
}