const ffmpeg = require('fluent-ffmpeg')
	, config = require(__dirname+'/../../config.js')
	, uploadDirectory = require(__dirname+'/uploadDirectory.js');

module.exports = (file, geometry, timestamp) => {
	const { thumbSize } = config.get;
	return new Promise((resolve, reject) => {
		const command = ffmpeg(`${uploadDirectory}/file/${file.filename}`)
		.on('end', () => {
			return resolve();
		})
		.on('error', function(err, stdout, stderr) {
			return reject(err);
		})
		if (timestamp === 0) {
			//bypass issue with some dumb files like audio album art covert not working with .screenshots
			command.inputOptions([
				'-t',
				0
			])
			.outputOptions([
				`-vf scale=${geometry.width > geometry.height ? thumbSize + ':-2' : '-2:' + thumbSize}`,
				'-frames:v 1'
			])
			.output(`${uploadDirectory}/file/thumb/${file.hash}${file.thumbextension}`)
			.run();
		} else {
			command.screenshots({
				timestamps: [timestamp],
				count: 1,
				filename: `${file.hash}${file.thumbextension}`,
				folder: `${uploadDirectory}/file/thumb/`,
				size: geometry.width > geometry.height ? `${thumbSize}x?` : `?x${thumbSize}`
				//keep aspect ratio, but also making sure taller/wider thumbs dont exceed thumbSize in either dimension
			});
		}
	});
};