import { ViewModel } from "../contracts/view-models/ViewModel";
import type { LeaderboardsViewData } from '../view-data/LeaderboardsViewData';
import { DriverLeaderboardItemViewModel } from './DriverLeaderboardItemViewModel';

export class DriverLeaderboardViewModel extends ViewModel {
  readonly drivers: DriverLeaderboardItemViewModel[];

  constructor(
    data: LeaderboardsViewData,
    previousRatings?: Record<string, number>,
  ) {
    super();
    this.drivers = data.drivers.map((driver) => {
      const previousRating = previousRatings?.[driver.id];
      return new DriverLeaderboardItemViewModel(driver, previousRating);
    });
  }

  /** UI-specific: Total races across all drivers */
  get totalRaces(): number {
    return this.drivers.reduce((sum, driver) => sum + driver.racesCompleted, 0);
  }

  /** UI-specific: Total wins across all drivers */
  get totalWins(): number {
    return this.drivers.reduce((sum, driver) => sum + driver.wins, 0);
  }

  /** UI-specific: Active drivers count */
  get activeCount(): number {
    // Note: LeaderboardDriverItem doesn't have isActive, but DriverLeaderboardItemViewModel might need it.
    // If it's not in ViewData, we might need to add it to LeaderboardDriverItem or handle it differently.
    // For now, I'll assume all drivers in the leaderboard are active or we filter them elsewhere.
    // Looking at DriverLeaderboardItemViewModel, it doesn't have isActive either, but the old VM did.
    return this.drivers.length;
  }
}