'use strict';
var parseMs = require('parse-ms');

function add(ret, val, postfix) {
	if (val > 0) {
		ret.push(val + postfix);
	}

	return ret;
}

module.exports = function (ms, opts) {
	if (typeof ms !== 'number') {
		throw new TypeError('Expected a number');
	}

	if (ms < 1000) {
		return Math.ceil(ms) + 'ms';
	}

	opts = opts || {};

	var ret = [];
	var parsed = parseMs(ms);

	ret = add(ret, parsed.days, 'd');
	ret = add(ret, parsed.hours, 'h');
	ret = add(ret, parsed.minutes, 'm');

	if (opts.compact) {
		ret = add(ret, parsed.seconds, 's');
		return '~' + ret[0];
	}

	ret = add(ret, (ms / 1000 % 60).toFixed(1).replace(/\.0$/, ''), 's');

	return ret.join(' ');
};