/**
 * Infrastructure Adapter: InMemoryRaceRepository
 * 
 * In-memory implementation of IRaceRepository.
 * Stores data in Map structure with UUID generation.
 */

import { v4 as uuidv4 } from 'uuid';
import { Race, RaceStatus } from '@gridpilot/racing/domain/entities/Race';
import type { IRaceRepository } from '@gridpilot/racing/domain/repositories/IRaceRepository';

export class InMemoryRaceRepository implements IRaceRepository {
  private races: Map<string, Race>;

  constructor(seedData?: Race[]) {
    this.races = new Map();
    
    if (seedData) {
      seedData.forEach(race => {
        this.races.set(race.id, race);
      });
    }
  }

  async findById(id: string): Promise<Race | null> {
    return this.races.get(id) ?? null;
  }

  async findAll(): Promise<Race[]> {
    return Array.from(this.races.values());
  }

  async findByLeagueId(leagueId: string): Promise<Race[]> {
    return Array.from(this.races.values())
      .filter(race => race.leagueId === leagueId)
      .sort((a, b) => a.scheduledAt.getTime() - b.scheduledAt.getTime());
  }

  async findUpcomingByLeagueId(leagueId: string): Promise<Race[]> {
    const now = new Date();
    return Array.from(this.races.values())
      .filter(race => 
        race.leagueId === leagueId && 
        race.status === 'scheduled' && 
        race.scheduledAt > now
      )
      .sort((a, b) => a.scheduledAt.getTime() - b.scheduledAt.getTime());
  }

  async findCompletedByLeagueId(leagueId: string): Promise<Race[]> {
    return Array.from(this.races.values())
      .filter(race => 
        race.leagueId === leagueId && 
        race.status === 'completed'
      )
      .sort((a, b) => b.scheduledAt.getTime() - a.scheduledAt.getTime());
  }

  async findByStatus(status: RaceStatus): Promise<Race[]> {
    return Array.from(this.races.values())
      .filter(race => race.status === status)
      .sort((a, b) => a.scheduledAt.getTime() - b.scheduledAt.getTime());
  }

  async findByDateRange(startDate: Date, endDate: Date): Promise<Race[]> {
    return Array.from(this.races.values())
      .filter(race => 
        race.scheduledAt >= startDate && 
        race.scheduledAt <= endDate
      )
      .sort((a, b) => a.scheduledAt.getTime() - b.scheduledAt.getTime());
  }

  async create(race: Race): Promise<Race> {
    if (await this.exists(race.id)) {
      throw new Error(`Race with ID ${race.id} already exists`);
    }

    this.races.set(race.id, race);
    return race;
  }

  async update(race: Race): Promise<Race> {
    if (!await this.exists(race.id)) {
      throw new Error(`Race with ID ${race.id} not found`);
    }

    this.races.set(race.id, race);
    return race;
  }

  async delete(id: string): Promise<void> {
    if (!await this.exists(id)) {
      throw new Error(`Race with ID ${id} not found`);
    }

    this.races.delete(id);
  }

  async exists(id: string): Promise<boolean> {
    return this.races.has(id);
  }

  /**
   * Utility method to generate a new UUID
   */
  static generateId(): string {
    return uuidv4();
  }
}