import { describe, it, expect, vi, type Mock } from 'vitest';
import { GetMediaUseCase } from './GetMediaUseCase';
import type { IMediaRepository } from '../../domain/repositories/IMediaRepository';
import type { IGetMediaPresenter } from '../presenters/IGetMediaPresenter';
import type { Logger } from '@core/shared/application';
import { Media } from '../../domain/entities/Media';
import { MediaUrl } from '../../domain/value-objects/MediaUrl';

interface TestPresenter extends IGetMediaPresenter {
  result?: any;
}

describe('GetMediaUseCase', () => {
  let mediaRepo: {
    findById: Mock;
  };
  let logger: Logger;
  let presenter: TestPresenter;
  let useCase: GetMediaUseCase;

  beforeEach(() => {
    mediaRepo = {
      findById: vi.fn(),
    } as unknown as IMediaRepository as any;

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

    presenter = {
      present: vi.fn((result) => {
        presenter.result = result;
      }),
    } as unknown as TestPresenter;

    useCase = new GetMediaUseCase(
      mediaRepo as unknown as IMediaRepository,
      logger,
    );
  });

  it('presents error when media is not found', async () => {
    mediaRepo.findById.mockResolvedValue(null);

    await useCase.execute({ mediaId: 'missing' }, presenter);

    expect(mediaRepo.findById).toHaveBeenCalledWith('missing');
    expect((presenter.present as unknown as Mock)).toHaveBeenCalledWith({
      success: false,
      errorMessage: 'Media not found',
    });
  });

  it('presents media details when media exists', async () => {
    const media = Media.create({
      id: 'media-1',
      filename: 'file.png',
      originalName: 'file.png',
      mimeType: 'image/png',
      size: 123,
      url: MediaUrl.create('https://example.com/file.png'),
      type: 'image',
      uploadedBy: 'user-1',
    });

    mediaRepo.findById.mockResolvedValue(media);

    await useCase.execute({ mediaId: 'media-1' }, presenter);

    expect(mediaRepo.findById).toHaveBeenCalledWith('media-1');
    expect((presenter.present as unknown as Mock)).toHaveBeenCalledWith({
      success: true,
      media: {
        id: media.id,
        filename: media.filename,
        originalName: media.originalName,
        mimeType: media.mimeType,
        size: media.size,
        url: media.url.value,
        type: media.type,
        uploadedBy: media.uploadedBy,
        uploadedAt: media.uploadedAt,
        metadata: media.metadata,
      },
    });
  });

  it('handles errors by logging and presenting failure', async () => {
    mediaRepo.findById.mockRejectedValue(new Error('DB error'));

    await useCase.execute({ mediaId: 'media-1' }, presenter);

    expect((logger.error as unknown as Mock)).toHaveBeenCalled();
    expect((presenter.present as unknown as Mock)).toHaveBeenCalledWith({
      success: false,
      errorMessage: 'Internal error occurred while retrieving media',
    });
  });
});