export interface ListItemProps {
  id: string;
  listId: string;
  title: string;
  description?: string;
  isCompleted: boolean;
  status: string; // 'todo' | 'in_progress' | 'completed' | 'watching' | 'watched'
  priority: string; // 'low' | 'normal' | 'high'
  metadata?: Record<string, any>;
  dueDate?: Date | null;
  createdAt: Date;
  updatedAt: Date;
}

export class ListItem {
  constructor(private readonly props: ListItemProps) {}

  public get id(): string { return this.props.id; }
  public get listId(): string { return this.props.listId; }
  public get title(): string { return this.props.title; }
  public get description(): string { return this.props.description || ''; }
  public get isCompleted(): boolean { return this.props.isCompleted; }
  public get status(): string { return this.props.status; }
  public get priority(): string { return this.props.priority; }
  public get metadata(): Record<string, any> | undefined { return this.props.metadata; }
  public get dueDate(): Date | null | undefined { return this.props.dueDate; }
  public get createdAt(): Date { return this.props.createdAt; }
  public get updatedAt(): Date { return this.props.updatedAt; }

  public toggleCompleted(): void {
    this.props.isCompleted = !this.props.isCompleted;
    this.props.status = this.props.isCompleted ? 'completed' : 'todo';
    this.props.updatedAt = new Date();
  }

  public updateStatus(status: string): void {
    this.props.status = status;
    this.props.isCompleted = (status === 'completed' || status === 'watched');
    this.props.updatedAt = new Date();
  }

  public toJSON(): ListItemProps {
    return { ...this.props };
  }
}