import type { Logger } from '@core/shared/domain/Logger';
import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
import type { Penalty } from '../../domain/entities/Penalty';
import {
    RecalculateChampionshipStandingsUseCase,
    type RecalculateChampionshipStandingsErrorCode,
    type RecalculateChampionshipStandingsInput
} from './RecalculateChampionshipStandingsUseCase';

describe('RecalculateChampionshipStandingsUseCase', () => {
  let useCase: RecalculateChampionshipStandingsUseCase;
  let leagueRepository: { findById: Mock };
  let seasonRepository: { findById: Mock };
  let leagueScoringConfigRepository: { findBySeasonId: Mock };
  let raceRepository: { findByLeagueId: Mock };
  let resultRepository: { findByRaceId: Mock };
  let penaltyRepository: { findByRaceId: Mock };
  let championshipStandingRepository: { saveAll: Mock };
  let eventScoringService: { scoreSession: Mock };
  let championshipAggregator: { aggregate: Mock };
  let logger: Logger;

  beforeEach(() => {
    leagueRepository = { findById: vi.fn() };
    seasonRepository = { findById: vi.fn() };
    leagueScoringConfigRepository = { findBySeasonId: vi.fn() };
    raceRepository = { findByLeagueId: vi.fn() };
    resultRepository = { findByRaceId: vi.fn() };
    penaltyRepository = { findByRaceId: vi.fn() };
    championshipStandingRepository = { saveAll: vi.fn() };
    eventScoringService = { scoreSession: vi.fn() };
    championshipAggregator = { aggregate: vi.fn() };
    logger = {
      debug: vi.fn(),
      info: vi.fn(),
      warn: vi.fn(),
      error: vi.fn(),
    } as any;

    useCase = new RecalculateChampionshipStandingsUseCase(leagueRepository as any,
      seasonRepository as any,
      leagueScoringConfigRepository as any,
      raceRepository as any,
      resultRepository as any,
      penaltyRepository as any,
      championshipStandingRepository as any,
      eventScoringService as any,
      championshipAggregator as any,
      logger);
  });

  it('returns league not found error', async () => {
    leagueRepository.findById.mockResolvedValue(null);

    const input: RecalculateChampionshipStandingsInput = {
      leagueId: 'league-1',
      seasonId: 'season-1',
    };

    const result = await useCase.execute(input);

    expect(result.isErr()).toBe(true);
    const error = result.unwrapErr() as ApplicationErrorCode<
      RecalculateChampionshipStandingsErrorCode,
      { message: string }
    >;
    expect(error.code).toBe('LEAGUE_NOT_FOUND');
    expect(error.details.message).toContain('league-1');
  });

  it('returns season not found error when season does not exist', async () => {
    leagueRepository.findById.mockResolvedValue({ id: 'league-1' });
    seasonRepository.findById.mockResolvedValue(null);

    const input: RecalculateChampionshipStandingsInput = {
      leagueId: 'league-1',
      seasonId: 'season-1',
    };

    const result = await useCase.execute(input);

    expect(result.isErr()).toBe(true);
    const error = result.unwrapErr() as ApplicationErrorCode<
      RecalculateChampionshipStandingsErrorCode,
      { message: string }
    >;
    expect(error.code).toBe('SEASON_NOT_FOUND');
  });

  it('returns season not found error when season belongs to different league', async () => {
    leagueRepository.findById.mockResolvedValue({ id: 'league-1' });
    seasonRepository.findById.mockResolvedValue({ id: 'season-1', leagueId: 'other-league' });

    const input: RecalculateChampionshipStandingsInput = {
      leagueId: 'league-1',
      seasonId: 'season-1',
    };

    const result = await useCase.execute(input);

    expect(result.isErr()).toBe(true);
    const error = result.unwrapErr() as ApplicationErrorCode<
      RecalculateChampionshipStandingsErrorCode,
      { message: string }
    >;
    expect(error.code).toBe('SEASON_NOT_FOUND');
  });

  it('recalculates standings successfully and returns result', async () => {
    const league = { id: 'league-1' };
    const season = { id: 'season-1', leagueId: 'league-1' };
    const championship = {
      id: 'champ-1',
      name: 'Champ 1',
      sessionTypes: ['main'],
      pointsTableBySessionType: {},
      dropScorePolicy: {},
    };
    const leagueScoringConfig = { championships: [championship] };
    const races = [{ id: 'race-1', sessionType: 'race' as const }];
    const results: unknown[] = [];
    const penalties: Penalty[] = [];
    const standings = [
      {
        participant: { id: 'driver-1' },
        position: { toNumber: () => 1 },
        totalPoints: { toNumber: () => 25 },
        resultsCounted: { toNumber: () => 1 },
        resultsDropped: { toNumber: () => 0 },
      },
    ];

    leagueRepository.findById.mockResolvedValue(league);
    seasonRepository.findById.mockResolvedValue(season);
    leagueScoringConfigRepository.findBySeasonId.mockResolvedValue(leagueScoringConfig);
    raceRepository.findByLeagueId.mockResolvedValue(races);
    resultRepository.findByRaceId.mockResolvedValue(results);
    penaltyRepository.findByRaceId.mockResolvedValue(penalties);
    eventScoringService.scoreSession.mockReturnValue({});
    championshipAggregator.aggregate.mockReturnValue(standings);
    championshipStandingRepository.saveAll.mockResolvedValue(undefined);

    const input: RecalculateChampionshipStandingsInput = {
      leagueId: 'league-1',
      seasonId: 'season-1',
    };

    const result = await useCase.execute(input);

    expect(result.isOk()).toBe(true);
    const presented = result.unwrap();
    expect(presented.leagueId).toBe('league-1');
    expect(presented.seasonId).toBe('season-1');
    expect(presented.entries).toHaveLength(1);
    expect(presented.entries[0]).toEqual({
      driverId: 'driver-1',
      teamId: null,
      position: 1,
      points: 25,
    });
  });

  it('wraps repository failures in REPOSITORY_ERROR', async () => {
    leagueRepository.findById.mockResolvedValue({ id: 'league-1' });
    seasonRepository.findById.mockResolvedValue({ id: 'season-1', leagueId: 'league-1' });
    leagueScoringConfigRepository.findBySeasonId.mockImplementation(() => {
      throw new Error('boom');
    });

    const input: RecalculateChampionshipStandingsInput = {
      leagueId: 'league-1',
      seasonId: 'season-1',
    };

    const result = await useCase.execute(input);

    expect(result.isErr()).toBe(true);
    const error = result.unwrapErr() as ApplicationErrorCode<
      RecalculateChampionshipStandingsErrorCode,
      { message: string }
    >;
    expect(error.code).toBe('REPOSITORY_ERROR');
    expect(error.details.message).toContain('boom');
  });
});