import { assert } from 'chai';
import mime from 'mime';
import path from 'node:path';
import fs from 'node:fs';

import * as mm from '../lib/index.js';
import { SourceStream, samplePath } from './util.js';
import { CouldNotDetermineFileTypeError, UnsupportedFileTypeError } from '../lib/ParseError.js';

describe('MIME & extension mapping', () => {

  const buf = new Uint8Array(30).fill(0);

  const audioExtension = ['.aac', '.mp3', '.ogg', '.wav', '.flac', '.m4a']; // ToDo: ass ".ac3"

  function handleError(extension: string, err: Error) {
    switch (extension) {
      case '.aac':
      case '.m4a':
      case '.flac':
      case '.wav':
      case '.ogg':
        assert.ok(err.message.startsWith('FourCC'), `Only FourCC error allowed, got: ${err.message}`);
        break;

      default:
        throw new Error(`caught error parsing ${extension}: ${err.message}`);
    }
  }

  it('should reject an unknown file', () => {

    return mm.parseFile(path.join(samplePath, 'flac.flac.jpg'))
      .then(() => assert.fail('Should reject extension'))
      .catch(err => {
        assert.strictEqual(err.message, 'Guessed MIME-type not supported: image/jpeg');
      });

  });

  it('should map MIME-types', () => {

    return Promise.all(audioExtension.map(extension => {
      const streamReader = new SourceStream(buf);
      // Convert extension to MIME-Type
      const mimeType = mime.getType(extension);
      assert.isNotNull(mimeType, `extension: ${extension}`);

      return mm.parseStream(streamReader, mimeType)
        .catch(err => {
          handleError(extension, err);
        });
    }));

  });

  it('should map on extension as well', () => {

    const prom = [];

    audioExtension.forEach(extension => {

      const streamReader = new SourceStream(buf);
      const res = mm.parseStream(streamReader, {path: extension}).catch(err => {
        handleError(extension, err);
      });

      prom.push(res);
    });

    return Promise.all(prom);

  });

  it('should be able to handle MIME-type parameter(s)', async () => {

    // Wrap stream around buffer, to prevent the `stream.path` is provided
    const buffer = fs.readFileSync(path.join(samplePath, 'MusicBrainz - Beth Hart - Sinner\'s Prayer [id3v2.3].wav'));
    const stream = new SourceStream(buffer);
    const metadata = await mm.parseStream(stream);
    assert.equal(metadata.format.container, 'WAVE');
  });

  describe('Resolve MIME based on content', () => {

    it('should fall back on content detection in case the extension is useless', async () => {

      const metadata = await mm.parseFile(path.join(samplePath, 'mp3', '1a643e9e0743dee8732554d0e870055a'));
      assert.equal(metadata.format.container, 'MPEG');
      assert.equal(metadata.format.codec, 'MPEG 1 Layer 3');
    });

    it('should throw error on unrecognized MIME-type', async () => {

      const streamReader = new SourceStream(buf);
      try {
        await mm.parseStream(streamReader, {mimeType: 'audio/not-existing'});
        assert.fail('Should throw an Error');
      } catch (err) {
        assert.equal(err.message, 'Failed to determine audio format');
        assert.instanceOf(err, CouldNotDetermineFileTypeError);
      }

    });

    it('should throw error on recognized MIME-type which is not supported', async () => {
      // Wrap stream around buffer, to prevent the `stream.path` is provided
      const buffer = fs.readFileSync(path.join(samplePath, 'flac.flac.jpg'));
      const stream = new SourceStream(buffer);

      try {
        await mm.parseStream(stream, {mimeType: 'audio/not-existing'});
        assert.fail('Should throw an Error');
      } catch (err) {
        assert.equal(err.message, 'Guessed MIME-type not supported: image/jpeg');
        assert.instanceOf(err, UnsupportedFileTypeError);
      }
    });

    async function testFileType(sample: string, container: string) {
      const stream = fs.createReadStream(path.join(samplePath, sample));
      const metadata = await mm.parseStream(stream);
      stream.close();
      assert.equal(metadata.format.container, container);
    }

    it('should recognize MP2', () => {
      return testFileType('1971 - 003 - Sweet - Co-Co - CannaPower.mp2', 'MPEG');
    });

    it('should recognize MP3', () => {
      return testFileType('04-Strawberry.mp3', 'MPEG');
    });

    it('should recognize WMA', () => {
      // file-type returns 'video/x-ms-wmv'
      return testFileType(path.join('asf', 'asf.wma'), 'ASF/audio');
    });

    it('should recognize MPEG-4 / m4a', () => {
      return testFileType('MusicBrainz - Beth Hart - Sinner\'s Prayer.m4a', 'M4A/mp42/isom');
    });

    it('should recognize MPEG-4 / m4b', () => {
      return testFileType(path.join('mp4', 'issue-127.m4b'), 'M4A/3gp5/isom');
    });

    it('should recognize MPEG-4 / mp4', () => {
      return testFileType(path.join('mp4', 'Mr. Pickles S02E07 My Dear Boy.mp4'), 'mp42/isom');
    });

    it('should recognize FLAC', () => {
      return testFileType('flac.flac', 'FLAC');
    });

    it('should recognize OGG', () => {
      return testFileType('issue_62.ogg', 'Ogg');
    });

    it('should recognize WAV', () => {
      return testFileType('MusicBrainz - Beth Hart - Sinner\'s Prayer [id3v2.3].wav', 'WAVE');
    });

    it('should recognize APE', () => {
      return testFileType('MusicBrainz - Beth Hart - Sinner\'s Prayer.ape', 'Monkey\'s Audio');
    });

    it('should recognize WMA', () => {
      return testFileType(path.join('asf', 'issue_57.wma'), 'ASF/audio');
    });

    it('should recognize WavPack', () => {
      return testFileType(path.join('wavpack', 'MusicBrainz - Beth Hart - Sinner\'s Prayer.wv'), 'WavPack');
    });

    it('should recognize SV7', () => {
      return testFileType(path.join('mpc', 'apev2.sv7.mpc'), 'Musepack, SV7');
    });

    it('should recognize SV8', () => {
      return testFileType(path.join('mpc', 'bach-goldberg-variatians-05.sv8.mpc'), 'Musepack, SV8');
    });

    it('should recognize DSF', () => {
      return testFileType(path.join('dsf', '2L-110_stereo-5644k-1b_04_0.1-sec.dsf'), 'DSF');
    });

    it('should recognize MKA', () => {
      return testFileType(path.join('matroska', '02 - Poxfil - Solid Ground (5 sec).mka'), 'EBML/matroska');
    });

    it('should recognize WebM', () => {
      return testFileType(path.join('matroska', '02 - Poxfil - Solid Ground (5 sec).opus.webm'), 'EBML/webm');
    });

  });

});
