'use strict';

var React = require('react'),
	createClass = require('create-react-class'),
	onClickOutside = require('react-onclickoutside').default
	;

var DateTimePickerMonths = onClickOutside( createClass({
	render: function() {
		return React.createElement('div', { className: 'rdtMonths' }, [
			React.createElement('table', { key: 'a' }, React.createElement('thead', {}, React.createElement('tr', {}, [
				React.createElement('th', { key: 'prev', className: 'rdtPrev', onClick: this.props.subtractTime( 1, 'years' )}, React.createElement('span', {}, '‹' )),
				React.createElement('th', { key: 'year', className: 'rdtSwitch', onClick: this.props.showView( 'years' ), colSpan: 2, 'data-value': this.props.viewDate.year() }, this.props.viewDate.year() ),
				React.createElement('th', { key: 'next', className: 'rdtNext', onClick: this.props.addTime( 1, 'years' )}, React.createElement('span', {}, '›' ))
			]))),
			React.createElement('table', { key: 'months' }, React.createElement('tbody', { key: 'b' }, this.renderMonths()))
		]);
	},

	renderMonths: function() {
		var date = this.props.selectedDate,
			month = this.props.viewDate.month(),
			year = this.props.viewDate.year(),
			rows = [],
			i = 0,
			months = [],
			renderer = this.props.renderMonth || this.renderMonth,
			isValid = this.props.isValidDate || this.alwaysValidDate,
			classes, props, currentMonth, isDisabled, noOfDaysInMonth, daysInMonth, validDay,
			// Date is irrelevant because we're only interested in month
			irrelevantDate = 1
			;

		while (i < 12) {
			classes = 'rdtMonth';
			currentMonth =
				this.props.viewDate.clone().set({ year: year, month: i, date: irrelevantDate });

			noOfDaysInMonth = currentMonth.endOf( 'month' ).format( 'D' );
			daysInMonth = Array.from({ length: noOfDaysInMonth }, function( e, i ) {
				return i + 1;
			});

			validDay = daysInMonth.find(function( d ) {
				var day = currentMonth.clone().set( 'date', d );
				return isValid( day );
			});

			isDisabled = ( validDay === undefined );

			if ( isDisabled )
				classes += ' rdtDisabled';

			if ( date && i === date.month() && year === date.year() )
				classes += ' rdtActive';

			props = {
				key: i,
				'data-value': i,
				className: classes
			};

			if ( !isDisabled )
				props.onClick = ( this.props.updateOn === 'months' ?
					this.updateSelectedMonth : this.props.setDate( 'month' ) );

			months.push( renderer( props, i, year, date && date.clone() ) );

			if ( months.length === 4 ) {
				rows.push( React.createElement('tr', { key: month + '_' + rows.length }, months ) );
				months = [];
			}

			i++;
		}

		return rows;
	},

	updateSelectedMonth: function( event ) {
		this.props.updateSelectedDate( event );
	},

	renderMonth: function( props, month ) {
		var localMoment = this.props.viewDate;
		var monthStr = localMoment.localeData().monthsShort( localMoment.month( month ) );
		var strLength = 3;
		// Because some months are up to 5 characters long, we want to
		// use a fixed string length for consistency
		var monthStrFixedLength = monthStr.substring( 0, strLength );
		return React.createElement('td', props, capitalize( monthStrFixedLength ) );
	},

	alwaysValidDate: function() {
		return 1;
	},

	handleClickOutside: function() {
		this.props.handleClickOutside();
	}
}));

function capitalize( str ) {
	return str.charAt( 0 ).toUpperCase() + str.slice( 1 );
}

module.exports = DateTimePickerMonths;
