import { describe, it, expect, vi, beforeEach } from 'vitest';
import { DriverRankingsPageQuery } from './DriverRankingsPageQuery';
import { DriverRankingsService } from '@/lib/services/leaderboards/DriverRankingsService';
import { Result } from '@/lib/contracts/Result';
import { DriverRankingsViewDataBuilder } from '@/lib/builders/view-data/DriverRankingsViewDataBuilder';
import { mapToPresentationError } from '@/lib/contracts/page-queries/PresentationError';

// Mock dependencies
const mockGetDriverRankings = vi.fn();
vi.mock('@/lib/services/leaderboards/DriverRankingsService', () => {
  return {
    DriverRankingsService: class {
      getDriverRankings = mockGetDriverRankings;
    },
  };
});

vi.mock('@/lib/builders/view-data/DriverRankingsViewDataBuilder', () => ({
  DriverRankingsViewDataBuilder: {
    build: vi.fn(),
  },
}));

vi.mock('@/lib/contracts/page-queries/PresentationError', () => ({
  mapToPresentationError: vi.fn(),
}));

describe('DriverRankingsPageQuery', () => {
  let query: DriverRankingsPageQuery;
  let mockServiceInstance: any;

  beforeEach(() => {
    vi.clearAllMocks();
    mockServiceInstance = {
      getDriverRankings: mockGetDriverRankings,
    };
    query = new DriverRankingsPageQuery(mockServiceInstance);
  });

  it('should return view data when service succeeds', async () => {
    const apiDto = { drivers: [{ id: 'driver-1', name: 'Test Driver', points: 100 }] };
    const viewData = { drivers: [{ id: 'driver-1', name: 'Test Driver', points: 100 }] };

    mockServiceInstance.getDriverRankings.mockResolvedValue(Result.ok(apiDto));
    (DriverRankingsViewDataBuilder.build as any).mockReturnValue(viewData);

    const result = await query.execute();

    expect(result.isOk()).toBe(true);
    expect(result.unwrap()).toEqual(viewData);
    expect(mockServiceInstance.getDriverRankings).toHaveBeenCalled();
    expect(DriverRankingsViewDataBuilder.build).toHaveBeenCalledWith(apiDto.drivers);
  });

  it('should return mapped presentation error when service fails', async () => {
    const serviceError = { type: 'notFound' };
    const presentationError = 'notFound';

    mockServiceInstance.getDriverRankings.mockResolvedValue(Result.err(serviceError));
    (mapToPresentationError as any).mockReturnValue(presentationError);

    const result = await query.execute();

    expect(result.isErr()).toBe(true);
    expect(result.getError()).toBe(presentationError);
    expect(mapToPresentationError).toHaveBeenCalledWith(serviceError);
  });

  it('should provide a static execute method', async () => {
    const apiDto = { drivers: [{ id: 'driver-1', name: 'Test Driver', points: 100 }] };
    const viewData = { drivers: [{ id: 'driver-1', name: 'Test Driver', points: 100 }] };

    mockServiceInstance.getDriverRankings.mockResolvedValue(Result.ok(apiDto));
    (DriverRankingsViewDataBuilder.build as any).mockReturnValue(viewData);

    const result = await DriverRankingsPageQuery.execute();

    expect(result.isOk()).toBe(true);
    expect(result.unwrap()).toEqual(viewData);
  });
});