import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import fs from 'node:fs/promises';
import path from 'node:path';
import os from 'node:os';
import { registerImageToPdfConverter } from '../../src/converters/imageToPdf.js';
import { resolve, listTargetFormats } from '../../src/converters/registry.js';
import { detectInputMime } from '../../src/mime.js';

let tmpDir;

beforeAll(async () => {
  registerImageToPdfConverter();
  tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'converter-image-to-pdf-'));
});

afterAll(async () => {
  await fs.rm(tmpDir, { recursive: true, force: true });
});

describe('image to PDF converter', () => {
  it('registers pdf as a target for every image format', () => {
    expect(listTargetFormats('png')).toContain('pdf');
    expect(listTargetFormats('jpg')).toContain('pdf');
  });

  it('converts a PNG fixture into a valid PDF', async () => {
    const inputPath = path.join(import.meta.dirname, '..', 'fixtures', 'sample.png');
    const outputPath = path.join(tmpDir, 'output.pdf');
    const entry = resolve('png', 'pdf');

    await entry.convert(inputPath, outputPath);

    const detected = await detectInputMime(outputPath);
    expect(detected.mime).toBe('application/pdf');
  });
});