'use strict';

var DateTime = require('./src/datetime');
var TimedNumber = require('./src/timednumber');
var TimedState = require('./src/timedstate');

// global offsets for datetime
var offsets = {
	days: 0,
	hours: 0
};

// global default format
var globalDefaultFormat = null;

exports.setOffsetInDays = function (d) {

	if (isNaN(d)) {
		throw new Error('invalidOffset');
	}

	offsets.days = d;
};

exports.setOffsetInHours = function (h) {

	if (isNaN(h)) {
		throw new Error('invalidOffset');
	}

	offsets.hours = h;
};

exports.setDefaultFormat = function (format) {
	globalDefaultFormat = format;
};

exports.setWeekNames = function (list) {
	DateTime.setWeekNames(list);
};

exports.setShortWeekNames = function (list) {
	DateTime.setShortWeekNames(list);
};

exports.setMonthName = function (list) {
	DateTime.setMonthName(list);
};

exports.setShortMonthNames = function (list) {
	DateTime.setShortMonthName(list);
};

exports.setPeriod = function (list) {
	DateTime.setPeriod(list);
};

exports.create = function (now, defaultFormat) {

	if (!defaultFormat && globalDefaultFormat) {
		defaultFormat = globalDefaultFormat;
	}

	var d = new DateTime(now, defaultFormat);

	if (offsets.days !== 0) {
		d.offsetInDays(offsets.days);
	}

	if (offsets.hours !== 0) {
		d.offsetInHours(offsets.hours);
	}

	return d;
};

exports.createTimedNumber = function (conf) {
	return new TimedNumber(conf);
};

exports.createTimedState = function (conf) {
	return new TimedState(conf);
};