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 { registerHeicConverter } from '../../src/converters/heic.js';
import { resolve, listTargetFormats } from '../../src/converters/registry.js';
import { detectInputMime } from '../../src/mime.js';

let tmpDir;

beforeAll(async () => {
  registerHeicConverter();
  tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'converter-heic-'));
});

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

describe('HEIC/HEIF converter registration', () => {
  it('registers heic and heif as source formats for every image target plus ico', () => {
    expect(listTargetFormats('heic')).toEqual(
      expect.arrayContaining(['jpg', 'jpeg', 'png', 'webp', 'gif', 'tiff', 'avif', 'ico'])
    );
    expect(listTargetFormats('heif')).toEqual(
      expect.arrayContaining(['jpg', 'jpeg', 'png', 'webp', 'gif', 'tiff', 'avif', 'ico'])
    );
  });

  it('never registers heic or heif as a target format', () => {
    expect(listTargetFormats('png')).not.toContain('heic');
    expect(listTargetFormats('png')).not.toContain('heif');
  });
});

describe('heic -> image conversion', () => {
  it('converts a HEIC fixture to PNG', async () => {
    const inputPath = path.join(import.meta.dirname, '..', 'fixtures', 'sample.heic');
    const outputPath = path.join(tmpDir, 'output.png');
    const entry = resolve('heic', 'png');

    await entry.convert(inputPath, outputPath);

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

  it('converts a HEIC fixture to JPG', async () => {
    const inputPath = path.join(import.meta.dirname, '..', 'fixtures', 'sample.heic');
    const outputPath = path.join(tmpDir, 'output.jpg');
    const entry = resolve('heic', 'jpg');

    await entry.convert(inputPath, outputPath);

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

  it('converts a HEIC fixture to ICO at the requested size', async () => {
    const inputPath = path.join(import.meta.dirname, '..', 'fixtures', 'sample.heic');
    const outputPath = path.join(tmpDir, 'output.ico');
    const entry = resolve('heic', 'ico');

    await entry.convert(inputPath, outputPath, { iconSize: 32 });

    const detected = await detectInputMime(outputPath);
    expect(detected.mime).toBe('image/x-icon');

    const { decodeIco } = await import('icojs');
    const [image] = await decodeIco(await fs.readFile(outputPath), 'image/png');
    expect(image.width).toBe(32);
  });
});

describe('heif -> image conversion', () => {
  it('converts a HEIF-declared fixture to PNG', async () => {
    const inputPath = path.join(import.meta.dirname, '..', 'fixtures', 'sample.heif');
    const outputPath = path.join(tmpDir, 'output-from-heif.png');
    const entry = resolve('heif', 'png');

    await entry.convert(inputPath, outputPath);

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