import 'package:equatable/equatable.dart';
import 'package:match_three/game/models/gem.dart';

enum StarCriteria {
  SCORE,
  MOVES_REMAINING,
  TIME_REMAINING,
  EFFICIENCY,
  COMBINED,
}

class Level extends Equatable {
  final int id;
  final String name;
  final String description;
  final LevelConstraints constraints;
  final LevelObjectives objectives;
  final StarRating starRating;
  final List<int> availableGemTypes;
  final bool unlocked;

  const Level({
    required this.id,
    required this.name,
    required this.description,
    required this.constraints,
    required this.objectives,
    required this.starRating,
    required this.availableGemTypes,
    this.unlocked = false,
  });

  factory Level.fromJson(Map<String, dynamic> json) {
    return Level(
      id: json['id'],
      name: json['name'],
      description: json['description'],
      constraints: LevelConstraints.fromJson(json['constraints']),
      objectives: LevelObjectives.fromJson(json['objectives']),
      starRating: StarRating.fromJson(json['starRating']),
      availableGemTypes: List<int>.from(json['availableGemTypes']),
      unlocked: json['unlocked'] ?? false,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'name': name,
      'description': description,
      'constraints': constraints.toJson(),
      'objectives': objectives.toJson(),
      'starRating': starRating.toJson(),
      'availableGemTypes': availableGemTypes,
      'unlocked': unlocked,
    };
  }

  Level copyWith({
    int? id,
    String? name,
    String? description,
    LevelConstraints? constraints,
    LevelObjectives? objectives,
    StarRating? starRating,
    List<int>? availableGemTypes,
    bool? unlocked,
  }) {
    return Level(
      id: id ?? this.id,
      name: name ?? this.name,
      description: description ?? this.description,
      constraints: constraints ?? this.constraints,
      objectives: objectives ?? this.objectives,
      starRating: starRating ?? this.starRating,
      availableGemTypes: availableGemTypes ?? this.availableGemTypes,
      unlocked: unlocked ?? this.unlocked,
    );
  }

  @override
  List<Object?> get props => [
        id,
        name,
        description,
        constraints,
        objectives,
        starRating,
        availableGemTypes,
        unlocked,
      ];
}

class LevelConstraints extends Equatable {
  final int? targetScore;
  final int? maxMoves;
  final int? timeLimit; // in seconds

  const LevelConstraints({
    this.targetScore,
    this.maxMoves,
    this.timeLimit,
  });

  factory LevelConstraints.fromJson(Map<String, dynamic> json) {
    return LevelConstraints(
      targetScore: json['targetScore'],
      maxMoves: json['maxMoves'],
      timeLimit: json['timeLimit'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'targetScore': targetScore,
      'maxMoves': maxMoves,
      'timeLimit': timeLimit,
    };
  }

  bool get hasTimeLimit => timeLimit != null;
  bool get hasMoveLimit => maxMoves != null;
  bool get hasScoreTarget => targetScore != null;

  @override
  List<Object?> get props => [targetScore, maxMoves, timeLimit];
}

class LevelObjectives extends Equatable {
  final Map<int, int> clearGemTypes; // gemType -> count required

  const LevelObjectives({
    this.clearGemTypes = const {},
  });

  factory LevelObjectives.fromJson(Map<String, dynamic> json) {
    Map<int, int> clearGemTypes = {};

    if (json['clearGemTypes'] != null) {
      final clearGemTypesJson = json['clearGemTypes'] as Map<String, dynamic>;
      clearGemTypes = clearGemTypesJson.map(
        (key, value) => MapEntry(int.parse(key), value as int),
      );
    }

    return LevelObjectives(
      clearGemTypes: clearGemTypes,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'clearGemTypes': clearGemTypes.map(
        (key, value) => MapEntry(key.toString(), value),
      ),
    };
  }

  bool get hasGemTypeObjectives => clearGemTypes.isNotEmpty;

  @override
  List<Object?> get props => [clearGemTypes];
}

class StarRating extends Equatable {
  final StarCriteria criteria;
  final StarThresholds thresholds;

  const StarRating({
    required this.criteria,
    required this.thresholds,
  });

  factory StarRating.fromJson(Map<String, dynamic> json) {
    return StarRating(
      criteria: StarCriteria.values.firstWhere(
        (e) => e.name == json['criteria'],
      ),
      thresholds: StarThresholds.fromJson(json['thresholds']),
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'criteria': criteria.name,
      'thresholds': thresholds.toJson(),
    };
  }

  @override
  List<Object?> get props => [criteria, thresholds];
}

class StarThresholds extends Equatable {
  final int oneStar;
  final int twoStar;
  final int threeStar;

  const StarThresholds({
    required this.oneStar,
    required this.twoStar,
    required this.threeStar,
  });

  factory StarThresholds.fromJson(Map<String, dynamic> json) {
    return StarThresholds(
      oneStar: json['oneStar'],
      twoStar: json['twoStar'],
      threeStar: json['threeStar'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'oneStar': oneStar,
      'twoStar': twoStar,
      'threeStar': threeStar,
    };
  }

  @override
  List<Object?> get props => [oneStar, twoStar, threeStar];
}

class LevelProgress extends Equatable {
  final int levelId;
  final bool completed;
  final int stars;
  final int bestScore;
  final bool unlocked;

  const LevelProgress({
    required this.levelId,
    this.completed = false,
    this.stars = 0,
    this.bestScore = 0,
    this.unlocked = false,
  });

  factory LevelProgress.fromJson(Map<String, dynamic> json) {
    return LevelProgress(
      levelId: json['levelId'],
      completed: json['completed'] ?? false,
      stars: json['stars'] ?? 0,
      bestScore: json['bestScore'] ?? 0,
      unlocked: json['unlocked'] ?? false,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'levelId': levelId,
      'completed': completed,
      'stars': stars,
      'bestScore': bestScore,
      'unlocked': unlocked,
    };
  }

  LevelProgress copyWith({
    int? levelId,
    bool? completed,
    int? stars,
    int? bestScore,
    bool? unlocked,
  }) {
    return LevelProgress(
      levelId: levelId ?? this.levelId,
      completed: completed ?? this.completed,
      stars: stars ?? this.stars,
      bestScore: bestScore ?? this.bestScore,
      unlocked: unlocked ?? this.unlocked,
    );
  }

  @override
  List<Object?> get props => [levelId, completed, stars, bestScore, unlocked];
}