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

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

      const result = CategoryIconViewDataBuilder.build(mediaDto);

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

    it('should handle SVG icons', () => {
      const buffer = new TextEncoder().encode('<svg xmlns="http://www.w3.org/2000/svg"><circle cx="10" cy="10" r="5"/></svg>');
      const mediaDto = {
        id: '2',
        url: 'http://example.com/icon.svg',
        type: 'image/svg+xml',
        uploadedAt: new Date().toISOString(),
        buffer: buffer.buffer,
      } as unknown as GetMediaOutputDTO;

      const result = CategoryIconViewDataBuilder.build(mediaDto);

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

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

      const result = CategoryIconViewDataBuilder.build(mediaDto);

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