const sharp = require('sharp');
const { exec } = require('child_process');

function createVideoThumbnail(videoPath, thumbMinPath, thumbAvgPath) {
  return new Promise((resolve) => {
    const cmd = `
      ffmpeg -y -i "${videoPath}" -ss 00:00:01.000 -vframes 1 "${thumbAvgPath}" &&
      ffmpeg -y -i "${thumbAvgPath}" -vf "scale=100:-1" "${thumbMinPath}"
    `;
    exec(cmd, () => resolve());
  });
}

async function createThumbnails(filePath, thumbMinPath, thumbAvgPath) {
  try {
    await sharp(filePath)
      .resize({ width: 100, height: 100, fit: 'inside', withoutEnlargement: true })
      .withMetadata()
      .toFile(thumbMinPath);

    await sharp(filePath)
      .resize({ width: 400, withoutEnlargement: true })
      .withMetadata()
      .toFile(thumbAvgPath);

  } catch (err) {
    console.error('Errore creazione thumbnails:', err.message, filePath);
  }
}

module.exports = { createVideoThumbnail, createThumbnails };