import { describe, it, expect, beforeEach, vi } from 'vitest';
import { GetDriversLeaderboardUseCase } from './GetDriversLeaderboardUseCase';
import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
import type { IRankingService } from '../../domain/services/IRankingService';
import type { IDriverStatsService } from '../../domain/services/IDriverStatsService';
import type { Logger } from '@core/shared/application';

describe('GetDriversLeaderboardUseCase', () => {
  const mockDriverFindAll = vi.fn();
  const mockDriverRepo: IDriverRepository = {
    findById: vi.fn(),
    findAll: mockDriverFindAll,
    create: vi.fn(),
    update: vi.fn(),
    delete: vi.fn(),
    exists: vi.fn(),
  };

  const mockRankingGetAllDriverRankings = vi.fn();
  const mockRankingService: IRankingService = {
    getAllDriverRankings: mockRankingGetAllDriverRankings,
  };

  const mockDriverStatsGetDriverStats = vi.fn();
  const mockDriverStatsService: IDriverStatsService = {
    getDriverStats: mockDriverStatsGetDriverStats,
  };

  const mockGetDriverAvatar = vi.fn();
  const mockLogger: Logger = {
    debug: vi.fn(),
    info: vi.fn(),
    warn: vi.fn(),
    error: vi.fn(),
  };

  beforeEach(() => {
    vi.clearAllMocks();
  });

  it('should return drivers leaderboard data', async () => {
    const useCase = new GetDriversLeaderboardUseCase(
      mockDriverRepo,
      mockRankingService,
      mockDriverStatsService,
      mockGetDriverAvatar,
      mockLogger,
    );

    const driver1 = { id: 'driver1', name: { value: 'Driver One' }, country: { value: 'US' } };
    const driver2 = { id: 'driver2', name: { value: 'Driver Two' }, country: { value: 'US' } };
    const rankings = [
      { driverId: 'driver1', rating: 2500, overallRank: 1 },
      { driverId: 'driver2', rating: 2400, overallRank: 2 },
    ];
    const stats1 = { totalRaces: 10, wins: 5, podiums: 7 };
    const stats2 = { totalRaces: 8, wins: 3, podiums: 4 };

    mockDriverFindAll.mockResolvedValue([driver1, driver2]);
    mockRankingGetAllDriverRankings.mockReturnValue(rankings);
    mockDriverStatsGetDriverStats.mockImplementation((id) => {
      if (id === 'driver1') return stats1;
      if (id === 'driver2') return stats2;
      return null;
    });
    mockGetDriverAvatar.mockImplementation((input) => {
      if (input.driverId === 'driver1') return Promise.resolve({ avatarUrl: 'avatar-driver1' });
      if (input.driverId === 'driver2') return Promise.resolve({ avatarUrl: 'avatar-driver2' });
      return Promise.resolve({ avatarUrl: 'avatar-default' });
    });

    const result = await useCase.execute();

    expect(result.isOk()).toBe(true);
    expect(result.value).toEqual({
      drivers: [
        {
          id: 'driver1',
          name: 'Driver One',
          rating: 2500,
          skillLevel: 'Pro',
          nationality: 'US',
          racesCompleted: 10,
          wins: 5,
          podiums: 7,
          isActive: true,
          rank: 1,
          avatarUrl: 'avatar-driver1',
        },
        {
          id: 'driver2',
          name: 'Driver Two',
          rating: 2400,
          skillLevel: 'Pro',
          nationality: 'US',
          racesCompleted: 8,
          wins: 3,
          podiums: 4,
          isActive: true,
          rank: 2,
          avatarUrl: 'avatar-driver2',
        },
      ],
      totalRaces: 18,
      totalWins: 8,
      activeCount: 2,
    });
  });

  it('should return empty result when no drivers', async () => {
    const useCase = new GetDriversLeaderboardUseCase(
      mockDriverRepo,
      mockRankingService,
      mockDriverStatsService,
      mockGetDriverAvatar,
      mockLogger,
    );

    mockDriverFindAll.mockResolvedValue([]);
    mockRankingGetAllDriverRankings.mockReturnValue([]);

    const result = await useCase.execute();

    expect(result.isOk()).toBe(true);
    expect(result.value).toEqual({
      drivers: [],
      totalRaces: 0,
      totalWins: 0,
      activeCount: 0,
    });
  });

  it('should handle drivers without stats', async () => {
    const useCase = new GetDriversLeaderboardUseCase(
      mockDriverRepo,
      mockRankingService,
      mockDriverStatsService,
      mockGetDriverAvatar,
      mockLogger,
    );

    const driver1 = { id: 'driver1', name: { value: 'Driver One' }, country: { value: 'US' } };
    const rankings = [{ driverId: 'driver1', rating: 2500, overallRank: 1 }];

    mockDriverFindAll.mockResolvedValue([driver1]);
    mockRankingGetAllDriverRankings.mockReturnValue(rankings);
    mockDriverStatsGetDriverStats.mockReturnValue(null);
    mockGetDriverAvatar.mockResolvedValue({ avatarUrl: 'avatar-driver1' });

    const result = await useCase.execute();

    expect(result.isOk()).toBe(true);
    expect(result.value).toEqual({
      drivers: [
        {
          id: 'driver1',
          name: 'Driver One',
          rating: 2500,
          skillLevel: 'Pro',
          nationality: 'US',
          racesCompleted: 0,
          wins: 0,
          podiums: 0,
          isActive: true,
          rank: 1,
          avatarUrl: 'avatar-driver1',
        },
      ],
      totalRaces: 0,
      totalWins: 0,
      activeCount: 1,
    });
  });

  it('should return error when repository throws', async () => {
    const useCase = new GetDriversLeaderboardUseCase(
      mockDriverRepo,
      mockRankingService,
      mockDriverStatsService,
      mockGetDriverAvatar,
      mockLogger,
    );

    const error = new Error('Repository error');
    mockDriverFindAll.mockRejectedValue(error);

    const result = await useCase.execute();

    expect(result.isErr()).toBe(true);
    expect(result.unwrapErr().code).toBe('REPOSITORY_ERROR');
    expect(result.unwrapErr().details.message).toBe('Repository error');
  });
});