import { describe, it, expect, vi, type Mock } from 'vitest';
import { RecordPageViewUseCase, type RecordPageViewInput } from './RecordPageViewUseCase';
import { PageView } from '../../domain/entities/PageView';
import type { Logger } from '@core/shared/application';
import type { EntityType, VisitorType } from '../../domain/types/PageView';

describe('RecordPageViewUseCase', () => {
  let pageViewRepository: {
    save: Mock;
  };
  let logger: Logger;
  let useCase: RecordPageViewUseCase;

  beforeEach(() => {
    type PageViewRepository = ConstructorParameters<typeof RecordPageViewUseCase>[0];

    pageViewRepository = {
      save: vi.fn(),
    };

    logger = {
      debug: vi.fn(),
      info: vi.fn(),
      warn: vi.fn(),
      error: vi.fn(),
    } as unknown as Logger;

    useCase = new RecordPageViewUseCase(
      pageViewRepository as unknown as PageViewRepository,
      logger,
    );
  });

  it('creates and saves a PageView and returns its id', async () => {
    const input: RecordPageViewInput = {
      entityType: 'league' as EntityType,
      entityId: 'league-1',
      visitorId: 'visitor-1',
      visitorType: 'anonymous' as VisitorType,
      sessionId: 'session-1',
      referrer: 'https://example.com',
      userAgent: 'jest',
      country: 'US',
    };

    pageViewRepository.save.mockResolvedValue(undefined);

    const result = await useCase.execute(input);

    expect(result.isOk()).toBe(true);
    const data = result.unwrap();
    expect(pageViewRepository.save).toHaveBeenCalledTimes(1);
    const saved = (pageViewRepository.save as unknown as Mock).mock.calls?.[0]?.[0] as PageView;

    expect(saved).toBeInstanceOf(PageView);
    expect(saved.id).toBeDefined();
    expect(saved.entityId).toBe(input.entityId);
    expect(saved.entityType).toBe(input.entityType);

    expect(data.pageViewId).toBe(saved.id);
    expect((logger.info as unknown as Mock)).toHaveBeenCalled();
  });

  it('logs and returns error when repository save fails', async () => {
    const input: RecordPageViewInput = {
      entityType: 'league' as EntityType,
      entityId: 'league-1',
      visitorType: 'anonymous' as VisitorType,
      sessionId: 'session-1',
    };

    const error = new Error('DB error');
    pageViewRepository.save.mockRejectedValue(error);

    const result = await useCase.execute(input);

    expect(result.isErr()).toBe(true);
    expect((logger.error as unknown as Mock)).toHaveBeenCalled();
  });
});