/**
 * Analytics dashboard view model
 *
 * View model for analytics dashboard data.
 *
 * Accepts AnalyticsDashboardInputViewData as input and produces UI-ready data.
 */
import { AnalyticsDashboardInputViewData } from "../view-data/AnalyticsDashboardInputViewData";
import { ViewModel } from "../contracts/view-models/ViewModel";

export class AnalyticsDashboardViewModel extends ViewModel {
  readonly totalUsers: number;
  readonly activeUsers: number;
  readonly totalRaces: number;
  readonly totalLeagues: number;

  constructor(viewData: AnalyticsDashboardInputViewData) {
    super();
    this.totalUsers = viewData.totalUsers;
    this.activeUsers = viewData.activeUsers;
    this.totalRaces = viewData.totalRaces;
    this.totalLeagues = viewData.totalLeagues;
  }

  /** UI-specific: User engagement rate */
  get userEngagementRate(): number {
    return this.totalUsers > 0 ? (this.activeUsers / this.totalUsers) * 100 : 0;
  }

  /** UI-specific: Formatted engagement rate */
  get formattedEngagementRate(): string {
    return `${this.userEngagementRate.toFixed(1)}%`;
  }

  /** UI-specific: Activity level */
  get activityLevel(): string {
    if (this.userEngagementRate > 70) return 'High';
    if (this.userEngagementRate > 40) return 'Medium';
    return 'Low';
  }
}