/**
 * Date handling utilities.
 */

Date.prototype.clone = function() {
	return new Date(this.getTime());
}

module.exports =
{
	WDays: [
		 'Sunday'
		,'Monday'
		,'Tuesday'
		,'Wednesday'
		,'Thursday'
		,'Friday'
		,'Saturday'
	]
	,AbrWDays: [
		 'Su'
		,'Mo'
		,'Tu'
		,'We'
		,'Th'
		,'Fr'
		,'Sa'
	]
	,Months: [
		 'January'
		,'February'
		,'March'
		,'April'
		,'May'
		,'June'
		,'July'
		,'August'
		,'September'
		,'October'
		,'November'
		,'December'
	]
	,AbrMonths: [
		 'Jan'
		,'Feb'
		,'Mar'
		,'Apr'
		,'AbrMay'
		,'Jun'
		,'Jul'
		,'Ago'
		,'Sep'
		,'Oct'
		,'Nov'
		,'Dec'
	]
	
	,tokenD: '%A, %B %e'
	
	,regexp: new RegExp('%[a-zA-Z]', 'g')

	,pad: function(number) {
		if (number < 10)
			return '0'+ number.toString();

		return number.toString();
	}
	
	,regexpFunc: function(d, token) {
		switch (token.charAt(1)) {
			// Minutes with 2 digits
			case 'M': return this.pad(d.getMinutes());

			// Hour with 2 digits in 24 hour format
			case 'H': return this.pad(d.getHours());

			// Complete time
			case 'T': return d.toLocaleTimeString();

			// Complete week day name
			case 'A': return _(this.WDays[d.getDay()]);

			// Abreviated week day name
			case 'a': return _(this.AbrWDays[d.getDay()]);

			// Day of month with 2 digits
			case 'd': return this.pad(d.getDate());

			// Day of month
			case 'e': return d.getDate();

			// Complete month name
			case 'B': return _(this.Months[d.getMonth()]);

			// Abreviated month name
			case 'b': return _(this.AbrMonths[d.getMonth()]);

			// Month number with 2 digits
			case 'm': return this.pad(d.getMonth() + 1);

			// Year with 4 digits
			case 'Y': return d.getFullYear();

			// Complete date without year
			case 'D': return _(this.tokenD).replace(this.regexp, this.regexpFunc.bind(this, d));
		}
		
		return token;
	}

	,strftime: function(date, format) {
		if (!date)
			return '';
		if (!(date instanceof Date))
			date = new Date(date);
		if (isNaN(date.getTime()))
			return date.toString();

		return format.replace(this.regexp, this.regexpFunc.bind(this, date));
	}
};