/**
 * Dependency Injection Container
 *
 * Initializes all in-memory repositories and provides accessor functions.
 * Allows easy swapping to persistent repositories later.
 */

import { Driver } from '@gridpilot/racing/domain/entities/Driver';
import { League } from '@gridpilot/racing/domain/entities/League';
import { Race } from '@gridpilot/racing/domain/entities/Race';
import { Result } from '@gridpilot/racing/domain/entities/Result';
import { Standing } from '@gridpilot/racing/domain/entities/Standing';

import type { IDriverRepository } from '@gridpilot/racing/domain/repositories/IDriverRepository';
import type { ILeagueRepository } from '@gridpilot/racing/domain/repositories/ILeagueRepository';
import type { IRaceRepository } from '@gridpilot/racing/domain/repositories/IRaceRepository';
import type { IResultRepository } from '@gridpilot/racing/domain/repositories/IResultRepository';
import type { IStandingRepository } from '@gridpilot/racing/domain/repositories/IStandingRepository';
import type { IFeedRepository } from '@gridpilot/social/domain/repositories/IFeedRepository';
import type { ISocialGraphRepository } from '@gridpilot/social/domain/repositories/ISocialGraphRepository';

import { InMemoryDriverRepository } from '@gridpilot/racing/infrastructure/repositories/InMemoryDriverRepository';
import { InMemoryLeagueRepository } from '@gridpilot/racing/infrastructure/repositories/InMemoryLeagueRepository';
import { InMemoryRaceRepository } from '@gridpilot/racing/infrastructure/repositories/InMemoryRaceRepository';
import { InMemoryResultRepository } from '@gridpilot/racing/infrastructure/repositories/InMemoryResultRepository';
import { InMemoryStandingRepository } from '@gridpilot/racing/infrastructure/repositories/InMemoryStandingRepository';
import { createStaticRacingSeed, type RacingSeedData } from '@gridpilot/testing-support';
import {
  InMemoryFeedRepository,
  InMemorySocialGraphRepository,
} from '@gridpilot/social/infrastructure/inmemory/InMemorySocialAndFeed';

/**
 * Seed data for development
 */
/**
 * Driver statistics and ranking data
 */
export interface DriverStats {
  driverId: string;
  rating: number;
  totalRaces: number;
  wins: number;
  podiums: number;
  dnfs: number;
  avgFinish: number;
  bestFinish: number;
  worstFinish: number;
  consistency: number;
  overallRank: number;
  percentile: number;
}

/**
 * Mock driver stats with calculated rankings
 */
const driverStats: Record<string, DriverStats> = {};

function createSeedData(): RacingSeedData {
  const seed = createStaticRacingSeed(42);
  const { drivers } = seed;

  drivers.forEach((driver, index) => {
    const totalRaces = 40 + index * 5;
    const wins = Math.max(0, Math.floor(totalRaces * 0.2) - index);
    const podiums = Math.max(wins * 2, 0);
    const dnfs = Math.max(0, Math.floor(index / 2));
    const rating = 1500 + index * 25;

    driverStats[driver.id] = {
      driverId: driver.id,
      rating,
      totalRaces,
      wins,
      podiums,
      dnfs,
      avgFinish: 4,
      bestFinish: 1,
      worstFinish: 20,
      consistency: 80,
      overallRank: index + 1,
      percentile: Math.max(0, 100 - index),
    };
  });

  return seed;
}

/**
 * DI Container class
 */
class DIContainer {
  private static instance: DIContainer;
  
  private _driverRepository: IDriverRepository;
  private _leagueRepository: ILeagueRepository;
  private _raceRepository: IRaceRepository;
  private _resultRepository: IResultRepository;
  private _standingRepository: IStandingRepository;
  private _feedRepository: IFeedRepository;
  private _socialRepository: ISocialGraphRepository;

  private constructor() {
    // Create seed data
    const seedData = createSeedData();

    // Initialize repositories with seed data
    this._driverRepository = new InMemoryDriverRepository(seedData.drivers);
    this._leagueRepository = new InMemoryLeagueRepository(seedData.leagues);
    this._raceRepository = new InMemoryRaceRepository(seedData.races);
    
    // Result repository needs race repository for league-based queries
    this._resultRepository = new InMemoryResultRepository(
      seedData.results,
      this._raceRepository
    );
    
    // Standing repository needs all three for recalculation
    this._standingRepository = new InMemoryStandingRepository(
      seedData.standings,
      this._resultRepository,
      this._raceRepository,
      this._leagueRepository
    );

    // Social and feed adapters backed by static seed
    this._feedRepository = new InMemoryFeedRepository(seedData);
    this._socialRepository = new InMemorySocialGraphRepository(seedData);
  }

  /**
   * Get singleton instance
   */
  static getInstance(): DIContainer {
    if (!DIContainer.instance) {
      DIContainer.instance = new DIContainer();
    }
    return DIContainer.instance;
  }

  /**
   * Reset the container (useful for testing)
   */
  static reset(): void {
    DIContainer.instance = new DIContainer();
  }

  /**
   * Repository getters
   */
  get driverRepository(): IDriverRepository {
    return this._driverRepository;
  }

  get leagueRepository(): ILeagueRepository {
    return this._leagueRepository;
  }

  get raceRepository(): IRaceRepository {
    return this._raceRepository;
  }

  get resultRepository(): IResultRepository {
    return this._resultRepository;
  }

  get standingRepository(): IStandingRepository {
    return this._standingRepository;
  }

  get feedRepository(): IFeedRepository {
    return this._feedRepository;
  }

  get socialRepository(): ISocialGraphRepository {
    return this._socialRepository;
  }
}

/**
 * Exported accessor functions
 */
export function getDriverRepository(): IDriverRepository {
  return DIContainer.getInstance().driverRepository;
}

export function getLeagueRepository(): ILeagueRepository {
  return DIContainer.getInstance().leagueRepository;
}

export function getRaceRepository(): IRaceRepository {
  return DIContainer.getInstance().raceRepository;
}

export function getResultRepository(): IResultRepository {
  return DIContainer.getInstance().resultRepository;
}

export function getStandingRepository(): IStandingRepository {
  return DIContainer.getInstance().standingRepository;
}

export function getFeedRepository(): IFeedRepository {
  return DIContainer.getInstance().feedRepository;
}

export function getSocialRepository(): ISocialGraphRepository {
  return DIContainer.getInstance().socialRepository;
}

/**
 * Reset function for testing
 */
export function resetContainer(): void {
  DIContainer.reset();
}

/**
 * Get driver statistics and rankings
 */
export function getDriverStats(driverId: string): DriverStats | null {
  return driverStats[driverId] || null;
}

/**
 * Get all driver rankings sorted by rating
 */
export function getAllDriverRankings(): DriverStats[] {
  return Object.values(driverStats).sort((a, b) => b.rating - a.rating);
}

/**
 * Get league-specific rankings for a driver
 */
export function getLeagueRankings(driverId: string, leagueId: string): {
  rank: number;
  totalDrivers: number;
  percentile: number;
} {
  // Mock league rankings (in production, calculate from actual league membership)
  const mockLeagueRanks: Record<string, Record<string, any>> = {
    'league-1': {
      'driver-1': { rank: 1, totalDrivers: 12, percentile: 92 },
      'driver-2': { rank: 2, totalDrivers: 12, percentile: 84 },
      'driver-3': { rank: 4, totalDrivers: 12, percentile: 67 },
      'driver-4': { rank: 5, totalDrivers: 12, percentile: 58 }
    }
  };

  return mockLeagueRanks[leagueId]?.[driverId] || { rank: 0, totalDrivers: 0, percentile: 0 };
}