import 'package:equatable/equatable.dart';

import 'track.dart';

/// Playlist entity
class Playlist extends Equatable {
  final String id;
  final String userId;
  final String name;
  final String? description;
  final String? imageUrl;
  final bool isPublic;
  final bool isCollaborative;
  final bool isSmart;
  final int trackCount;
  final int totalDuration;
  final DateTime createdAt;
  final DateTime updatedAt;
  final List<PlaylistTrack>? tracks;

  const Playlist({
    required this.id,
    required this.userId,
    required this.name,
    this.description,
    this.imageUrl,
    this.isPublic = false,
    this.isCollaborative = false,
    this.isSmart = false,
    this.trackCount = 0,
    this.totalDuration = 0,
    required this.createdAt,
    required this.updatedAt,
    this.tracks,
  });

  /// Format total duration as Xh Ym or Ym Zs
  String get formattedDuration {
    final hours = totalDuration ~/ 3600;
    final minutes = (totalDuration % 3600) ~/ 60;
    final seconds = totalDuration % 60;

    if (hours > 0) {
      return '${hours}h ${minutes}m';
    } else if (minutes > 0) {
      return '${minutes}m ${seconds}s';
    } else {
      return '${seconds}s';
    }
  }

  /// Create Playlist from JSON
  factory Playlist.fromJson(Map<String, dynamic> json) {
    return Playlist(
      id: json['id'] as String,
      userId: json['user_id'] as String,
      name: json['name'] as String,
      description: json['description'] as String?,
      imageUrl: json['image_url'] as String?,
      isPublic: json['is_public'] as bool? ?? false,
      isCollaborative: json['is_collaborative'] as bool? ?? false,
      isSmart: json['is_smart'] as bool? ?? false,
      trackCount: json['track_count'] as int? ?? 0,
      totalDuration: json['total_duration'] as int? ?? 0,
      createdAt: json['created_at'] != null
          ? DateTime.parse(json['created_at'] as String)
          : DateTime.now(),
      updatedAt: json['updated_at'] != null
          ? DateTime.parse(json['updated_at'] as String)
          : DateTime.now(),
      tracks: json['tracks'] != null
          ? (json['tracks'] as List)
              .map((item) => PlaylistTrack.fromJson(item as Map<String, dynamic>))
              .toList()
          : null,
    );
  }

  @override
  List<Object?> get props => [
        id,
        userId,
        name,
        isPublic,
        isCollaborative,
        trackCount,
        totalDuration,
      ];
}

/// Playlist track association
class PlaylistTrack extends Equatable {
  final String id;
  final String playlistId;
  final String trackId;
  final int position;
  final DateTime addedAt;
  final String? addedBy;
  final Track? track;

  const PlaylistTrack({
    required this.id,
    required this.playlistId,
    required this.trackId,
    required this.position,
    required this.addedAt,
    this.adddedBy,
    this.track,
  });

  /// Create PlaylistTrack from JSON
  factory PlaylistTrack.fromJson(Map<String, dynamic> json) {
    return PlaylistTrack(
      id: json['id'] as String,
      playlistId: json['playlist_id'] as String,
      trackId: json['track_id'] as String,
      position: json['position'] as int,
      addedAt: json['added_at'] != null
          ? DateTime.parse(json['added_at'] as String)
          : DateTime.now(),
      addedBy: json['added_by'] as String?,
      track: json['track'] != null
          ? Track.fromJson(json['track'] as Map<String, dynamic>)
          : null,
    );
  }

  @override
  List<Object?> get props => [id, playlistId, trackId, position, addedAt];
}