import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
import { League } from '../../domain/entities/League';
import { Season } from '../../domain/entities/season/Season';
import type { LeagueRepository } from '../../domain/repositories/LeagueRepository';
import type { SeasonRepository } from '../../domain/repositories/SeasonRepository';
import {
    GetLeagueSeasonsUseCase,
    type GetLeagueSeasonsErrorCode,
    type GetLeagueSeasonsInput,
} from './GetLeagueSeasonsUseCase';

describe('GetLeagueSeasonsUseCase', () => {
  let useCase: GetLeagueSeasonsUseCase;
  let seasonRepository: {
    findByLeagueId: Mock;
  };
  let leagueRepository: {
    findById: Mock;
    exists: Mock;
  };

  beforeEach(() => {
    seasonRepository = {
      findByLeagueId: vi.fn(),
    };

    leagueRepository = {
      findById: vi.fn(),
      exists: vi.fn(),
    };

    useCase = new GetLeagueSeasonsUseCase(
      leagueRepository as unknown as LeagueRepository,
      seasonRepository as unknown as SeasonRepository
    );
  });

  it('should return seasons with correct isParallelActive flags on success', async () => {
    const leagueId = 'league-1';
    const league = League.create({
      id: leagueId,
      name: 'Test League',
      description: 'A test league',
      ownerId: 'owner-1',
    });

    const seasons = [
      Season.create({
        id: 'season-1',
        leagueId,
        gameId: 'game-1',
        name: 'Season 1',
        status: 'active',
        startDate: new Date('2023-01-01'),
        endDate: new Date('2023-12-31'),
      }),
      Season.create({
        id: 'season-2',
        leagueId,
        gameId: 'game-1',
        name: 'Season 2',
        status: 'planned',
      }),
    ];

    leagueRepository.exists.mockResolvedValue(true);
    leagueRepository.findById.mockResolvedValue(league);
    seasonRepository.findByLeagueId.mockResolvedValue(seasons);

    const result = await useCase.execute({ leagueId } satisfies GetLeagueSeasonsInput);

    expect(result.isOk()).toBe(true);
    const presented = result.unwrap();

    expect(presented.seasons).toHaveLength(2);

    expect(presented.seasons[0]?.season).toBe(seasons[0]);
    expect(presented.seasons[0]?.isPrimary).toBe(true);
    expect(presented.seasons[0]?.isParallelActive).toBe(false);

    expect(presented.seasons[1]?.season).toBe(seasons[1]);
    expect(presented.seasons[1]?.isPrimary).toBe(false);
    expect(presented.seasons[1]?.isParallelActive).toBe(false);
  });

  it('should set isParallelActive true for active seasons when multiple active', async () => {
    const leagueId = 'league-1';
    const league = League.create({
      id: leagueId,
      name: 'Test League',
      description: 'A test league',
      ownerId: 'owner-1',
    });

    const seasons = [
      Season.create({
        id: 'season-1',
        leagueId,
        gameId: 'game-1',
        name: 'Season 1',
        status: 'active',
      }),
      Season.create({
        id: 'season-2',
        leagueId,
        gameId: 'game-1',
        name: 'Season 2',
        status: 'active',
      }),
    ];

    leagueRepository.exists.mockResolvedValue(true);
    leagueRepository.findById.mockResolvedValue(league);
    seasonRepository.findByLeagueId.mockResolvedValue(seasons);

    const result = await useCase.execute({ leagueId } satisfies GetLeagueSeasonsInput);

    expect(result.isOk()).toBe(true);
    const presented = result.unwrap();

    expect(presented.seasons).toHaveLength(2);
    expect(presented.seasons[0]?.isParallelActive).toBe(true);
    expect(presented.seasons[1]?.isParallelActive).toBe(true);
  });

  it('should return LEAGUE_NOT_FOUND error when league does not exist', async () => {
    const leagueId = 'missing-league';

    leagueRepository.exists.mockResolvedValue(false);

    const result = await useCase.execute({ leagueId } satisfies GetLeagueSeasonsInput);

    expect(result.isErr()).toBe(true);
    const err = result.unwrapErr() as ApplicationErrorCode<
      GetLeagueSeasonsErrorCode,
      { message: string }
    >;

    expect(err.code).toBe('LEAGUE_NOT_FOUND');
    expect(err.details.message).toBe('League not found');
  });

  it('should return REPOSITORY_ERROR when repository throws', async () => {
    const leagueId = 'league-1';
    const errorMessage = 'DB error';

    leagueRepository.exists.mockRejectedValue(new Error(errorMessage));

    const result = await useCase.execute({ leagueId } satisfies GetLeagueSeasonsInput);

    expect(result.isErr()).toBe(true);
    const err = result.unwrapErr() as ApplicationErrorCode<
      GetLeagueSeasonsErrorCode,
      { message: string }
    >;

    expect(err.code).toBe('REPOSITORY_ERROR');
    expect(err.details.message).toBe(errorMessage);
  });
});