import type { DriverStats } from '@core/racing/domain/services/IDriverStatsService';

/**
 * Global store for driver stats that can be populated during seeding
 * and read by the InMemoryDriverStatsService
 */
export class DriverStatsStore {
  private static instance: DriverStatsStore;
  private statsMap = new Map<string, DriverStats>();

  private constructor() {}

  static getInstance(): DriverStatsStore {
    if (!DriverStatsStore.instance) {
      DriverStatsStore.instance = new DriverStatsStore();
    }
    return DriverStatsStore.instance;
  }

  /**
   * Populate the store with stats (called during seeding)
   */
  loadStats(stats: Map<string, DriverStats>): void {
    this.statsMap.clear();
    stats.forEach((input, driverId) => {
      this.statsMap.set(driverId, input);
    });
  }

  /**
   * Get stats for a specific driver
   */
  getDriverStats(driverId: string): DriverStats | null {
    return this.statsMap.get(driverId) ?? null;
  }

  /**
   * Clear all stats (useful for reseeding)
   */
  clear(): void {
    this.statsMap.clear();
  }

  /**
   * Get all stats (for debugging)
   */
  getAllStats(): Map<string, DriverStats> {
    return new Map(this.statsMap);
  }
}