'use strict';

const Promise = require("bluebird");
const uuid = require("uuid");
const defaultValue = require("default-value");
const childProcess = Promise.promisifyAll(require("child-process"), {multiArgs: true});

module.exports = function(storePath) {
	function getPath(id) {
		return path.join(storePath, `${id}.img`);
	}

	return {
		getPath: function getDisk(id) {
			return getPath(id);
		},
		create: function createDisk(size, options = {}) {
			return Promise.try(() => {
				let imageFormat = defaultValue(options.format, "qcow2");

				let diskId = uuid.v4();

				return Promise.try(() => {
					childProcess.execFileAsync("qemu-img", [
						"create",
						"-f", imageFormat,
						getPath(diskId),
						size
					]);
				}).then(([stdout, stderr]) => {
					return diskId;
				});
			});
		},
		resize: function resizeDisk(id, size) {

		}
	}
}