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

import { v4 as uuidv4 } from 'uuid';
import { League } from '@gridpilot/racing/domain/entities/League';
import type { ILeagueRepository } from '@gridpilot/racing/domain/repositories/ILeagueRepository';
import type { ILogger } from '@gridpilot/shared/logging/ILogger';

export class InMemoryLeagueRepository implements ILeagueRepository {
  private leagues: Map<string, League>;
  private readonly logger: ILogger;

  constructor(logger: ILogger, seedData?: League[]) {
    this.logger = logger;
    this.logger.info('InMemoryLeagueRepository initialized.');
    this.leagues = new Map();
    
    if (seedData) {
      seedData.forEach(league => {
        this.leagues.set(league.id, league);
        this.logger.debug(`Seeded league: ${league.id}.`);
      });
    }
  }

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

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

  async findByOwnerId(ownerId: string): Promise<League[]> {
    this.logger.debug(`Finding leagues by owner id: ${ownerId}`);
    try {
      const leagues = Array.from(this.leagues.values()).filter(
        league => league.ownerId === ownerId
      );
      this.logger.info(`Found ${leagues.length} leagues for owner id: ${ownerId}.`);
      return leagues;
    } catch (error) {
      this.logger.error(`Error finding leagues by owner id ${ownerId}:`, error);
      throw error;
    }
  }

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

      this.leagues.set(league.id, league);
      this.logger.info(`League ${league.id} created successfully.`);
      return league;
    } catch (error) {
      this.logger.error(`Error creating league ${league.id}:`, error);
      throw error;
    }
  }

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

      this.leagues.set(league.id, league);
      this.logger.info(`League ${league.id} updated successfully.`);
      return league;
    } catch (error) {
      this.logger.error(`Error updating league ${league.id}:`, error);
      throw error;
    }
  }

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

      this.leagues.delete(id);
      this.logger.info(`League ${id} deleted successfully.`);
    } catch (error) {
      this.logger.error(`Error deleting league ${id}:`, error);
      throw error;
    }
  }

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

  async searchByName(query: string): Promise<League[]> {
    this.logger.debug(`Searching leagues by name query: ${query}`);
    try {
      const normalizedQuery = query.toLowerCase();
      const leagues = Array.from(this.leagues.values()).filter(league =>
        league.name.toLowerCase().includes(normalizedQuery)
      );
      this.logger.info(`Found ${leagues.length} leagues matching search query: ${query}.`);
      return leagues;
    } catch (error) {
      this.logger.error(`Error searching leagues by name query ${query}:`, error);
      throw error;
    }
  }

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