import 'macro_profile.dart';
import 'recipe_ingredient.dart';

/// Immutable recipe imported from the web (schema.org/JSON-LD or
/// OpenGraph fallback) or saved manually.
///
/// Pure Dart (no framework imports) so the entity can be shared by the
/// scraper use case, the drift-backed repository, and the Riverpod
/// presentation layer without leaking infrastructure concerns into the
/// domain.
class Recipe {
  const Recipe({
    required this.id,
    required this.title,
    required this.sourceUrl,
    this.imageUrl,
    this.description,
    this.prepTimeMinutes = 0,
    this.cookTimeMinutes = 0,
    this.servings = 1,
    this.ingredients = const [],
    this.instructions = const [],
    required this.macrosPerServing,
  });

  /// UUID primary key assigned when the recipe is first materialized.
  final String id;

  /// Human-readable recipe title (`name` / `og:title`).
  final String title;

  /// URL the recipe was imported from; also used to de-duplicate re-imports.
  final String sourceUrl;

  /// Representative image URL (`image` / `og:image`), if any.
  final String? imageUrl;

  /// Optional summary (`description` / `og:description`).
  final String? description;

  /// Preparation time in minutes (`prepTime`, ISO-8601 duration decoded);
  /// `0` when unknown.
  final int prepTimeMinutes;

  /// Cook time in minutes (`cookTime`); `0` when unknown.
  final int cookTimeMinutes;

  /// Yield parsed from `recipeYield` (defaults to 4 when unparsable).
  final int servings;

  /// Parsed ingredient lines (raw text preserved).
  final List<RecipeIngredient> ingredients;

  /// Instruction steps with `HowToStep` / `HowToSection` wrappers flattened.
  final List<String> instructions;

  /// Nutrition facts per serving (`nutrition` block).
  final MacroProfile macrosPerServing;

  /// Total active time (prep + cook) in minutes.
  int get totalMinutes => prepTimeMinutes + cookTimeMinutes;

  Recipe copyWith({
    String? id,
    String? title,
    String? sourceUrl,
    String? imageUrl,
    String? description,
    int? prepTimeMinutes,
    int? cookTimeMinutes,
    int? servings,
    List<RecipeIngredient>? ingredients,
    List<String>? instructions,
    MacroProfile? macrosPerServing,
  }) =>
      Recipe(
        id: id ?? this.id,
        title: title ?? this.title,
        sourceUrl: sourceUrl ?? this.sourceUrl,
        imageUrl: imageUrl ?? this.imageUrl,
        description: description ?? this.description,
        prepTimeMinutes: prepTimeMinutes ?? this.prepTimeMinutes,
        cookTimeMinutes: cookTimeMinutes ?? this.cookTimeMinutes,
        servings: servings ?? this.servings,
        ingredients: ingredients ?? this.ingredients,
        instructions: instructions ?? this.instructions,
        macrosPerServing: macrosPerServing ?? this.macrosPerServing,
      );

  @override
  String toString() => 'Recipe($id, "$title", '
      '${macrosPerServing.proteinGrams}g protein/serving)';
}