/**
 * 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';
import type { ILogger } from '@gridpilot/shared/logging/ILogger';

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

  constructor(logger: ILogger, seedData?: Race[]) {
    this.logger = logger;
    this.logger.info('InMemoryRaceRepository initialized.');
    this.races = new Map();
    
    if (seedData) {
      seedData.forEach(race => {
        this.races.set(race.id, race);
        this.logger.debug(`Seeded race: ${race.id}.`);
      });
    }
  }

  async findById(id: string): Promise<Race | null> {
    this.logger.debug(`Finding race by id: ${id}`);
    try {
      const race = this.races.get(id) ?? null;
      if (race) {
        this.logger.info(`Found race: ${id}.`);
      } else {
        this.logger.warn(`Race with id ${id} not found.`);
      }
      return race;
    } catch (error) {
      this.logger.error(`Error finding race by id ${id}:`, error);
      throw error;
    }
  }

  async findAll(): Promise<Race[]> {
    this.logger.debug('Finding all races.');
    try {
      const races = Array.from(this.races.values());
      this.logger.info(`Found ${races.length} races.`);
      return races;
    } catch (error) {
      this.logger.error('Error finding all races:', error);
      throw error;
    }
  }

  async findByLeagueId(leagueId: string): Promise<Race[]> {
    this.logger.debug(`Finding races by league id: ${leagueId}`);
    try {
      const races = Array.from(this.races.values())
        .filter(race => race.leagueId === leagueId)
        .sort((a, b) => a.scheduledAt.getTime() - b.scheduledAt.getTime());
      this.logger.info(`Found ${races.length} races for league id: ${leagueId}.`);
      return races;
    } catch (error) {
      this.logger.error(`Error finding races by league id ${leagueId}:`, error);
      throw error;
    }
  }

  async findUpcomingByLeagueId(leagueId: string): Promise<Race[]> {
    this.logger.debug(`Finding upcoming races by league id: ${leagueId}`);
    try {
      const now = new Date();
      const races = 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());
      this.logger.info(`Found ${races.length} upcoming races for league id: ${leagueId}.`);
      return races;
    } catch (error) {
      this.logger.error(`Error finding upcoming races by league id ${leagueId}:`, error);
      throw error;
    }
  }

  async findCompletedByLeagueId(leagueId: string): Promise<Race[]> {
    this.logger.debug(`Finding completed races by league id: ${leagueId}`);
    try {
      const races = Array.from(this.races.values())
        .filter(race =>
          race.leagueId === leagueId &&
          race.status === 'completed'
        )
        .sort((a, b) => b.scheduledAt.getTime() - a.scheduledAt.getTime());
      this.logger.info(`Found ${races.length} completed races for league id: ${leagueId}.`);
      return races;
    } catch (error) {
      this.logger.error(`Error finding completed races by league id ${leagueId}:`, error);
      throw error;
    }
  }

  async findByStatus(status: RaceStatus): Promise<Race[]> {
    this.logger.debug(`Finding races by status: ${status}`);
    try {
      const races = Array.from(this.races.values())
        .filter(race => race.status === status)
        .sort((a, b) => a.scheduledAt.getTime() - b.scheduledAt.getTime());
      this.logger.info(`Found ${races.length} races with status: ${status}.`);
      return races;
    } catch (error) {
      this.logger.error(`Error finding races by status ${status}:`, error);
      throw error;
    }
  }

  async findByDateRange(startDate: Date, endDate: Date): Promise<Race[]> {
    this.logger.debug(`Finding races by date range: ${startDate.toISOString()} - ${endDate.toISOString()}`);
    try {
      const races = Array.from(this.races.values())
        .filter(race =>
          race.scheduledAt >= startDate &&
          race.scheduledAt <= endDate
        )
        .sort((a, b) => a.scheduledAt.getTime() - b.scheduledAt.getTime());
      this.logger.info(`Found ${races.length} races in date range.`);
      return races;
    } catch (error) {
      this.logger.error(`Error finding races by date range:`, error);
      throw error;
    }
  }

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

      this.races.set(race.id, race);
      this.logger.info(`Race ${race.id} created successfully.`);
      return race;
    } catch (error) {
      this.logger.error(`Error creating race ${race.id}:`, error);
      throw error;
    }
  }

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

      this.races.set(race.id, race);
      this.logger.info(`Race ${race.id} updated successfully.`);
      return race;
    } catch (error) {
      this.logger.error(`Error updating race ${race.id}:`, error);
      throw error;
    }
  }

  async delete(id: string): Promise<void> {
    this.logger.debug(`Deleting race: ${id}`);
    try {
      if (!await this.exists(id)) {
        this.logger.warn(`Race with ID ${id} not found for deletion.`);
        throw new Error(`Race with ID ${id} not found`);
      }

      this.races.delete(id);
      this.logger.info(`Race ${id} deleted successfully.`);
    } catch (error) {
      this.logger.error(`Error deleting race ${id}:`, error);
      throw error;
    }
  }

  async exists(id: string): Promise<boolean> {
    this.logger.debug(`Checking existence of race with id: ${id}`);
    try {
      const exists = this.races.has(id);
      this.logger.debug(`Race ${id} exists: ${exists}.`);
      return exists;
    } catch (error) {
      this.logger.error(`Error checking existence of race with id ${id}:`, error);
      throw error;
    }
  }

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