import { describe, it, expect } from 'vitest';
import { AvatarViewDataBuilder } from './AvatarViewDataBuilder';
import type { GetMediaOutputDTO } from '@/lib/types/generated/GetMediaOutputDTO';

describe('AvatarViewDataBuilder', () => {
  describe('happy paths', () => {
    it('should transform binary data to AvatarViewData correctly', () => {
      const buffer = new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);
      const mediaDto = {
        id: '1',
        url: 'http://example.com/image.png',
        type: 'image/png',
        uploadedAt: new Date().toISOString(),
        buffer: buffer.buffer,
      } as unknown as GetMediaOutputDTO;

      const result = AvatarViewDataBuilder.build(mediaDto);

      expect(result.buffer).toBe(Buffer.from(buffer).toString('base64'));
      expect(result.contentType).toBe('image/png');
    });

    it('should handle JPEG images', () => {
      const buffer = new Uint8Array([0xff, 0xd8, 0xff, 0xe0]);
      const mediaDto = {
        id: '2',
        url: 'http://example.com/image.jpg',
        type: 'image/jpeg',
        uploadedAt: new Date().toISOString(),
        buffer: buffer.buffer,
      } as unknown as GetMediaOutputDTO;

      const result = AvatarViewDataBuilder.build(mediaDto);

      expect(result.buffer).toBe(Buffer.from(buffer).toString('base64'));
      expect(result.contentType).toBe('image/jpeg');
    });
  });

  describe('edge cases', () => {
    it('should handle empty buffer', () => {
      const buffer = new Uint8Array([]);
      const mediaDto = {
        id: '3',
        url: 'http://example.com/image.png',
        type: 'image/png',
        uploadedAt: new Date().toISOString(),
        buffer: buffer.buffer,
      } as unknown as GetMediaOutputDTO;

      const result = AvatarViewDataBuilder.build(mediaDto);

      expect(result.buffer).toBe('');
      expect(result.contentType).toBe('image/png');
    });
  });
});