import { ViewModel } from "../contracts/view-models/ViewModel";
import type { MediaAssetViewData } from "../view-data/MediaViewData";

/**
 * Media View Model
 *
 * Client-only ViewModel created from ViewData (never DTO).
 * Represents a single media asset card in the UI.
 */
export class MediaViewModel extends ViewModel {
  private readonly data: MediaAssetViewData;

  constructor(data: MediaAssetViewData) {
    super();
    this.data = data;
  }

  get id(): string { return this.data.id; }
  get src(): string { return this.data.src; }
  get title(): string { return this.data.title; }
  get category(): string { return this.data.category; }
  get date(): string | undefined { return this.data.date; }
  get dimensions(): string | undefined { return this.data.dimensions; }

  /** UI-specific: Combined subtitle used by MediaCard */
  get subtitle(): string {
    return `${this.category}${this.dimensions ? ` • ${this.dimensions}` : ''}`;
  }

  /** UI-specific: Whether any metadata is present */
  get hasMetadata(): boolean {
    return !!this.date || !!this.dimensions;
  }
}