enum TaskStatus { todo, inProgress, done }

enum TaskPriority { none, low, medium, high }

extension TaskStatusExtension on TaskStatus {
  String get value => switch (this) {
        TaskStatus.todo => 'todo',
        TaskStatus.inProgress => 'in_progress',
        TaskStatus.done => 'done',
      };

  String get label => switch (this) {
        TaskStatus.todo => 'To Do',
        TaskStatus.inProgress => 'In Progress',
        TaskStatus.done => 'Done',
      };

  static TaskStatus fromString(String? s) => switch (s) {
        'in_progress' => TaskStatus.inProgress,
        'done' => TaskStatus.done,
        _ => TaskStatus.todo,
      };
}

extension TaskPriorityExtension on TaskPriority {
  String get value => switch (this) {
        TaskPriority.none => 'none',
        TaskPriority.low => 'low',
        TaskPriority.medium => 'medium',
        TaskPriority.high => 'high',
      };

  String get label => switch (this) {
        TaskPriority.none => 'None',
        TaskPriority.low => 'Low',
        TaskPriority.medium => 'Medium',
        TaskPriority.high => 'High',
      };

  static TaskPriority fromString(String? s) => switch (s) {
        'high' => TaskPriority.high,
        'medium' => TaskPriority.medium,
        'low' => TaskPriority.low,
        _ => TaskPriority.none,
      };
}

class Task {
  final int id;
  final String title;
  final String? description;
  final TaskStatus status;
  final TaskPriority priority;
  final DateTime? dueDate;
  final int? projectId;
  final int? milestoneId;
  final int? parentId;
  final DateTime createdAt;
  final DateTime updatedAt;

  const Task({
    required this.id,
    required this.title,
    this.description,
    required this.status,
    required this.priority,
    this.dueDate,
    this.projectId,
    this.milestoneId,
    this.parentId,
    required this.createdAt,
    required this.updatedAt,
  });

  factory Task.fromJson(Map<String, dynamic> json) => Task(
        id: json['id'] as int,
        title: json['title'] as String? ?? '',
        description: json['body'] as String?,
        status: TaskStatusExtension.fromString(json['status'] as String?),
        priority: TaskPriorityExtension.fromString(json['priority'] as String?),
        dueDate: json['due_date'] != null
            ? DateTime.parse(json['due_date'] as String)
            : null,
        projectId: json['project_id'] as int?,
        milestoneId: json['milestone_id'] as int?,
        parentId: json['parent_id'] as int?,
        createdAt: DateTime.parse(json['created_at'] as String),
        updatedAt: DateTime.parse(json['updated_at'] as String),
      );

  Map<String, dynamic> toJson() => {
        'title': title,
        'body': description,
        'status': status.value,
        'priority': priority.value,
        'due_date': dueDate?.toIso8601String(),
        'project_id': projectId,
        'milestone_id': milestoneId,
        'parent_id': parentId,
      };

  Task copyWith({
    String? title,
    String? description,
    TaskStatus? status,
    TaskPriority? priority,
    DateTime? dueDate,
    Object? projectId = _undefined,
    Object? milestoneId = _undefined,
    Object? parentId = _undefined,
  }) =>
      Task(
        id: id,
        title: title ?? this.title,
        description: description ?? this.description,
        status: status ?? this.status,
        priority: priority ?? this.priority,
        dueDate: dueDate ?? this.dueDate,
        projectId: identical(projectId, _undefined)
            ? this.projectId
            : projectId as int?,
        milestoneId: identical(milestoneId, _undefined)
            ? this.milestoneId
            : milestoneId as int?,
        parentId: identical(parentId, _undefined)
            ? this.parentId
            : parentId as int?,
        createdAt: createdAt,
        updatedAt: updatedAt,
      );

  static const _undefined = Object();
}