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

export class AnalyticsDashboardViewModel extends ViewModel {
  private readonly data: AnalyticsDashboardInputViewData;

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

  get totalUsers(): number { return this.data.totalUsers; }
  get activeUsers(): number { return this.data.activeUsers; }
  get totalRaces(): number { return this.data.totalRaces; }
  get totalLeagues(): number { return this.data.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';
  }
}