import { describe, it, expect, beforeEach } from 'vitest';
import { LeaderboardsTestContext } from '../LeaderboardsTestContext';
import { ValidationError } from '../../../../core/shared/errors/ValidationError';

describe('GetDriverRankingsUseCase - Edge Cases & Errors', () => {
  let context: LeaderboardsTestContext;

  beforeEach(() => {
    context = LeaderboardsTestContext.create();
    context.clear();
  });

  describe('Edge Cases', () => {
    it('should handle system with no drivers', async () => {
      const result = await context.getDriverRankingsUseCase.execute({});
      expect(result.drivers).toHaveLength(0);
      expect(context.eventPublisher.getDriverRankingsAccessedEventCount()).toBe(1);
    });

    it('should handle drivers with same rating', async () => {
      context.repository.addDriver({ id: 'driver-1', name: 'Zoe', rating: 5.0, raceCount: 50 });
      context.repository.addDriver({ id: 'driver-2', name: 'Alice', rating: 5.0, raceCount: 45 });
      context.repository.addDriver({ id: 'driver-3', name: 'Bob', rating: 5.0, raceCount: 40 });

      const result = await context.getDriverRankingsUseCase.execute({});

      expect(result.drivers[0]!.rating).toBe(5.0);
      expect(result.drivers[1]!.rating).toBe(5.0);
      expect(result.drivers[2]!.rating).toBe(5.0);
      expect(result.drivers[0]!.name).toBe('Alice');
      expect(result.drivers[1]!.name).toBe('Bob');
      expect(result.drivers[2]!.name).toBe('Zoe');
      expect(context.eventPublisher.getDriverRankingsAccessedEventCount()).toBe(1);
    });

    it('should handle drivers with no team affiliation', async () => {
      context.repository.addDriver({ id: 'driver-1', name: 'Driver A', rating: 5.0, teamId: 'team-1', teamName: 'Team 1', raceCount: 10 });
      context.repository.addDriver({ id: 'driver-2', name: 'Driver B', rating: 4.8, raceCount: 10 });

      const result = await context.getDriverRankingsUseCase.execute({});

      expect(result.drivers).toHaveLength(2);
      expect(result.drivers[0]!.teamId).toBe('team-1');
      expect(result.drivers[1]!.teamId).toBeUndefined();
      expect(context.eventPublisher.getDriverRankingsAccessedEventCount()).toBe(1);
    });

    it('should handle pagination with empty results', async () => {
      const result = await context.getDriverRankingsUseCase.execute({ page: 1, limit: 20 });
      expect(result.drivers).toHaveLength(0);
      expect(result.pagination.total).toBe(0);
      expect(result.pagination.totalPages).toBe(0);
      expect(context.eventPublisher.getDriverRankingsAccessedEventCount()).toBe(1);
    });
  });

  describe('Error Handling', () => {
    it('should handle driver repository errors gracefully', async () => {
      const originalFindAllDrivers = context.repository.findAllDrivers.bind(context.repository);
      context.repository.findAllDrivers = async () => {
        throw new Error('Repository error');
      };

      try {
        await context.getDriverRankingsUseCase.execute({});
        expect(true).toBe(false);
      } catch (error) {
        expect(error).toBeInstanceOf(Error);
        expect((error as Error).message).toBe('Repository error');
      }

      expect(context.eventPublisher.getDriverRankingsAccessedEventCount()).toBe(0);
      context.repository.findAllDrivers = originalFindAllDrivers;
    });

    it('should handle invalid query parameters', async () => {
      try {
        await context.getDriverRankingsUseCase.execute({ page: -1 });
        expect(true).toBe(false);
      } catch (error) {
        expect(error).toBeInstanceOf(ValidationError);
      }
      expect(context.eventPublisher.getDriverRankingsAccessedEventCount()).toBe(0);
    });
  });
});