import { describe, it, expect, vi, beforeEach } from 'vitest';
import { GetDriverRankingsUseCase, GetDriverRankingsUseCasePorts } from './GetDriverRankingsUseCase';
import { ValidationError } from '../../../shared/errors/ValidationError';

describe('GetDriverRankingsUseCase', () => {
  let mockLeaderboardsRepository: any;
  let mockEventPublisher: any;
  let ports: GetDriverRankingsUseCasePorts;
  let useCase: GetDriverRankingsUseCase;

  const mockDrivers = [
    { id: '1', name: 'Alice', rating: 2000, raceCount: 10, teamId: 't1', teamName: 'Team A' },
    { id: '2', name: 'Bob', rating: 1500, raceCount: 5, teamId: 't2', teamName: 'Team B' },
    { id: '3', name: 'Charlie', rating: 1800, raceCount: 8 },
  ];

  beforeEach(() => {
    mockLeaderboardsRepository = {
      findAllDrivers: vi.fn().mockResolvedValue([...mockDrivers]),
    };
    mockEventPublisher = {
      publishDriverRankingsAccessed: vi.fn().mockResolvedValue(undefined),
      publishLeaderboardsError: vi.fn().mockResolvedValue(undefined),
    };
    ports = {
      leaderboardsRepository: mockLeaderboardsRepository,
      eventPublisher: mockEventPublisher,
    };
    useCase = new GetDriverRankingsUseCase(ports);
  });

  it('should return all drivers sorted by rating DESC by default', async () => {
    const result = await useCase.execute();

    expect(result.drivers).toHaveLength(3);
    expect(result.drivers[0].name).toBe('Alice');
    expect(result.drivers[1].name).toBe('Charlie');
    expect(result.drivers[2].name).toBe('Bob');
    expect(result.drivers[0].rank).toBe(1);
    expect(result.drivers[1].rank).toBe(2);
    expect(result.drivers[2].rank).toBe(3);
    expect(mockEventPublisher.publishDriverRankingsAccessed).toHaveBeenCalled();
  });

  it('should filter drivers by search term', async () => {
    const result = await useCase.execute({ search: 'ali' });

    expect(result.drivers).toHaveLength(1);
    expect(result.drivers[0].name).toBe('Alice');
  });

  it('should filter drivers by minRating', async () => {
    const result = await useCase.execute({ minRating: 1700 });

    expect(result.drivers).toHaveLength(2);
    expect(result.drivers.map(d => d.name)).toContain('Alice');
    expect(result.drivers.map(d => d.name)).toContain('Charlie');
  });

  it('should filter drivers by teamId', async () => {
    const result = await useCase.execute({ teamId: 't1' });

    expect(result.drivers).toHaveLength(1);
    expect(result.drivers[0].name).toBe('Alice');
  });

  it('should sort drivers by name ASC', async () => {
    const result = await useCase.execute({ sortBy: 'name', sortOrder: 'asc' });

    expect(result.drivers[0].name).toBe('Alice');
    expect(result.drivers[1].name).toBe('Bob');
    expect(result.drivers[2].name).toBe('Charlie');
  });

  it('should paginate results', async () => {
    const result = await useCase.execute({ page: 2, limit: 1 });

    expect(result.drivers).toHaveLength(1);
    expect(result.drivers[0].name).toBe('Charlie'); // Alice (1), Charlie (2), Bob (3)
    expect(result.pagination.total).toBe(3);
    expect(result.pagination.totalPages).toBe(3);
    expect(result.pagination.page).toBe(2);
  });

  it('should throw ValidationError for invalid page', async () => {
    await expect(useCase.execute({ page: 0 })).rejects.toThrow(ValidationError);
    expect(mockEventPublisher.publishLeaderboardsError).toHaveBeenCalled();
  });

  it('should throw ValidationError for invalid limit', async () => {
    await expect(useCase.execute({ limit: 0 })).rejects.toThrow(ValidationError);
  });

  it('should throw ValidationError for invalid sortBy', async () => {
    await expect(useCase.execute({ sortBy: 'invalid' as any })).rejects.toThrow(ValidationError);
  });
});