import { beforeEach, describe, expect, it, vi, type Mock } from 'vitest';
import type { Game } from '../../domain/entities/Game';
import type { League } from '../../domain/entities/League';
import type { LeagueScoringConfig } from '../../domain/entities/LeagueScoringConfig';
import type { Season } from '../../domain/entities/season/Season';
import type { GameRepository } from '../../domain/repositories/GameRepository';
import type { LeagueRepository } from '../../domain/repositories/LeagueRepository';
import type { LeagueScoringConfigRepository } from '../../domain/repositories/LeagueScoringConfigRepository';
import type { SeasonRepository } from '../../domain/repositories/SeasonRepository';
import type { LeagueScoringPreset } from '../../domain/types/LeagueScoringPreset';
import { GetLeagueScoringConfigUseCase } from './GetLeagueScoringConfigUseCase';

describe('GetLeagueScoringConfigUseCase', () => {
  let useCase: GetLeagueScoringConfigUseCase;
  let mockLeagueRepository: LeagueRepository;
  let mockSeasonRepository: SeasonRepository;
  let mockLeagueScoringConfigRepository: LeagueScoringConfigRepository;
  let mockGameRepository: GameRepository;
  let mockPresetProvider: { getPresetById: Mock };

  beforeEach(() => {
    mockLeagueRepository = {
      findById: vi.fn(),
      exists: vi.fn(),
      save: vi.fn(),
      findAll: vi.fn(),
    } as unknown as LeagueRepository;

    mockSeasonRepository = {
      findByLeagueId: vi.fn(),
      save: vi.fn(),
      findById: vi.fn(),
    } as unknown as SeasonRepository;

    mockLeagueScoringConfigRepository = {
      findBySeasonId: vi.fn(),
      save: vi.fn(),
    } as unknown as LeagueScoringConfigRepository;

    mockGameRepository = {
      findById: vi.fn(),
      save: vi.fn(),
      findAll: vi.fn(),
    } as unknown as GameRepository;

    mockPresetProvider = {
      getPresetById: vi.fn(),
    };

    useCase = new GetLeagueScoringConfigUseCase(
      mockLeagueRepository,
      mockSeasonRepository,
      mockLeagueScoringConfigRepository,
      mockGameRepository,
      mockPresetProvider as unknown as { getPresetById: (id: string) => LeagueScoringPreset | undefined },
    );
  });

  it('should return scoring config with league, season, game, and preset', async () => {
    const mockLeague = { id: 'league-1', name: 'Test League' } as League;
    const mockSeason = { 
      id: 'season-1', 
      gameId: 'game-1',
      status: { toString: () => 'active' } 
    } as unknown as Season;
    const mockScoringConfig = { 
      id: 'config-1', 
      gameId: 'game-1',
      scoringPresetId: 'preset-1' 
    } as unknown as LeagueScoringConfig;
    const mockGame = { id: 'game-1', name: 'Test Game' } as Game;
    const mockPreset = { id: 'preset-1', name: 'Test Preset' } as LeagueScoringPreset;

    mockLeagueRepository.findById.mockResolvedValue(mockLeague);
    mockSeasonRepository.findByLeagueId.mockResolvedValue([mockSeason]);
    mockLeagueScoringConfigRepository.findBySeasonId.mockResolvedValue(mockScoringConfig);
    mockGameRepository.findById.mockResolvedValue(mockGame);
    mockPresetProvider.getPresetById.mockReturnValue(mockPreset);

    const result = await useCase.execute({ leagueId: 'league-1' });

    expect(result.isOk()).toBe(true);
    const value = result.unwrap();
    expect(value.league).toBe(mockLeague);
    expect(value.season).toBe(mockSeason);
    expect(value.scoringConfig).toBe(mockScoringConfig);
    expect(value.game).toBe(mockGame);
    expect(value.preset).toBe(mockPreset);
  });

  it('should return LEAGUE_NOT_FOUND when league does not exist', async () => {
    mockLeagueRepository.findById.mockResolvedValue(null);

    const result = await useCase.execute({ leagueId: 'non-existent' });

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr()).toEqual({
      code: 'LEAGUE_NOT_FOUND',
      details: { message: 'League not found' },
    });
  });

  it('should return NO_SEASONS when no seasons exist for league', async () => {
    const mockLeague = { id: 'league-1', name: 'Test League' } as League;

    mockLeagueRepository.findById.mockResolvedValue(mockLeague);
    mockSeasonRepository.findByLeagueId.mockResolvedValue([]);

    const result = await useCase.execute({ leagueId: 'league-1' });

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr()).toEqual({
      code: 'NO_SEASONS',
      details: { message: 'No seasons found for league' },
    });
  });

  it('should return NO_ACTIVE_SEASON when no active season exists', async () => {
    const mockLeague = { id: 'league-1', name: 'Test League' } as League;
    const mockSeason = { 
      id: 'season-1', 
      gameId: 'game-1',
      status: { toString: () => 'inactive' } 
    } as unknown as Season;

    mockLeagueRepository.findById.mockResolvedValue(mockLeague);
    mockSeasonRepository.findByLeagueId.mockResolvedValue([mockSeason]);

    const result = await useCase.execute({ leagueId: 'league-1' });

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr()).toEqual({
      code: 'NO_ACTIVE_SEASON',
      details: { message: 'No active season found for league' },
    });
  });

  it('should return NO_SCORING_CONFIG when scoring config not found', async () => {
    const mockLeague = { id: 'league-1', name: 'Test League' } as League;
    const mockSeason = { 
      id: 'season-1', 
      gameId: 'game-1',
      status: { toString: () => 'active' } 
    } as unknown as Season;

    mockLeagueRepository.findById.mockResolvedValue(mockLeague);
    mockSeasonRepository.findByLeagueId.mockResolvedValue([mockSeason]);
    mockLeagueScoringConfigRepository.findBySeasonId.mockResolvedValue(null);

    const result = await useCase.execute({ leagueId: 'league-1' });

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr()).toEqual({
      code: 'NO_SCORING_CONFIG',
      details: { message: 'Scoring configuration not found' },
    });
  });

  it('should return GAME_NOT_FOUND when game does not exist', async () => {
    const mockLeague = { id: 'league-1', name: 'Test League' } as League;
    const mockSeason = { 
      id: 'season-1', 
      gameId: 'game-1',
      status: { toString: () => 'active' } 
    } as unknown as Season;
    const mockScoringConfig = { 
      id: 'config-1', 
      gameId: 'game-1',
      scoringPresetId: 'preset-1' 
    } as unknown as LeagueScoringConfig;

    mockLeagueRepository.findById.mockResolvedValue(mockLeague);
    mockSeasonRepository.findByLeagueId.mockResolvedValue([mockSeason]);
    mockLeagueScoringConfigRepository.findBySeasonId.mockResolvedValue(mockScoringConfig);
    mockGameRepository.findById.mockResolvedValue(null);

    const result = await useCase.execute({ leagueId: 'league-1' });

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr()).toEqual({
      code: 'GAME_NOT_FOUND',
      details: { message: 'Game not found for season' },
    });
  });

  it('should handle preset without presetId', async () => {
    const mockLeague = { id: 'league-1', name: 'Test League' } as League;
    const mockSeason = { 
      id: 'season-1', 
      gameId: 'game-1',
      status: { toString: () => 'active' } 
    } as unknown as Season;
    const mockScoringConfig = { 
      id: 'config-1', 
      gameId: 'game-1',
      scoringPresetId: null 
    } as unknown as LeagueScoringConfig;
    const mockGame = { id: 'game-1', name: 'Test Game' } as Game;

    mockLeagueRepository.findById.mockResolvedValue(mockLeague);
    mockSeasonRepository.findByLeagueId.mockResolvedValue([mockSeason]);
    mockLeagueScoringConfigRepository.findBySeasonId.mockResolvedValue(mockScoringConfig);
    mockGameRepository.findById.mockResolvedValue(mockGame);

    const result = await useCase.execute({ leagueId: 'league-1' });

    expect(result.isOk()).toBe(true);
    const value = result.unwrap();
    expect(value.preset).toBeUndefined();
  });

  it('should return REPOSITORY_ERROR on exception', async () => {
    mockLeagueRepository.findById.mockRejectedValue(new Error('Database error'));

    const result = await useCase.execute({ leagueId: 'league-1' });

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr()).toEqual({
      code: 'REPOSITORY_ERROR',
      details: { message: 'Database error' },
    });
  });
});
