/*!
 * jQuery UI Checkboxradio @VERSION
 * http://jqueryui.com
 *
 * Copyright 2014 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/checkboxradio/
 */
( function( factory ) {
	if ( typeof define === "function" && define.amd ) {

		// AMD. Register as an anonymous module.
		define( [
			"jquery",
			"./core",
			"./widget"
		], factory );
	} else {

		// Browser globals
		factory( jQuery );
	}
}( function( $ ) {

// Remove and replace with reset handler extension
var formResetHandler = function() {
		var form = $( this );

		// Wait for the form reset to actually happen before refreshing
		setTimeout( function() {

			// We dont filter for css only versions since css only is not supported
			form.find( ".ui-checkboxradio" ).checkboxradio( "refresh" );
		} );
	};

$.widget( "ui.checkboxradio", {
	version: "@VERSION",
	options: {
		disabled: null,
		label: null,
		icon: true,
		classes: {
			"ui-checkboxradio-label": "ui-corner-all",
			"ui-checkboxradio-icon": "ui-corner-all"
		}
	},

	_getCreateOptions: function() {
		var disabled, labels,
			that = this,
			options = this._super() || {};

		// We read the type here, because it makes more sense to throw a element type error first,
		// rather then the error for lack of a label. Often if its the wrong type, it
		// won't have a label (e.g. calling on a div, btn, etc)
		this._readType();

		labels = this.element.labels();

		// Todo: For now we will use the last label we need to check about the best
		// way to handle multiple labels with some accessability experts
		this.label = $( labels[ labels.length - 1 ] );
		if ( !this.label.length ) {
			$.error( "No label found for checkboxradio widget" );
		}

		this.originalLabel = "";

		// We need to get the label text but this may also need to make sure it does not contain the
		// input itself.
		this.label.contents().not( this.element ).each( function() {

			// The label contents could be text html or a mix we concat each element to get a string
			// representation of the label without the input as part of it.
			that.originalLabel += this.nodeType === 3 ? $( this ).text() : this.outerHTML;
		} );

		// Set the label option if we found label text
		if ( this.originalLabel ) {
			options.label = this.originalLabel;
		}

		disabled = this.element[ 0 ].disabled;
		if ( disabled != null ) {
			options.disabled = disabled;
		}
		return options;
	},

	_create: function() {
		var formCount,
			checked = this.element[ 0 ].checked,
			form = this.element.form();
		this.formParent = !!form.length ? form : $( "body" );

		formCount = this.formParent.data( "uiCheckboxradioCount" ) || 0;

		// We don't use _on and _off here because we want all the checkboxes in the same form to use
		// single handler which handles all the checkboxradio widgets in the form
		if ( formCount === 0 ) {
			this.formParent.on( "reset." + this.widgetFullName, formResetHandler );
		}

		this.formParent.data( "uiCheckboxradioCount", formCount + 1 );

		if ( this.options.disabled == null ) {
			this.options.disabled = this.element[ 0 ].disabled || false;
		}

		this._setOption( "disabled", this.options.disabled );
		this._addClass( "ui-checkboxradio", "ui-helper-hidden-accessible" );
		this._addClass( this.label, "ui-checkboxradio-label", "ui-button ui-widget" );

		if ( this.type === "radio" ) {
			this._addClass( this.label, "ui-checkboxradio-radio-label" );
		}

		if ( this.options.label && this.options.label !== this.originalLabel ) {
			this._updateLabel();
		} else if ( this.originalLabel ) {
			this.options.label = this.originalLabel;
		}

		this._enhance();

		if ( checked ) {
			this._addClass( this.label, "ui-checkboxradio-checked", "ui-state-active" );
			this._addClass( this.icon, null, "ui-state-hover" );
		}

		this._on( {
			"change": "_toggleClasses",
			"focus": function() {
				this._addClass( this.label, null, "ui-state-focus ui-visual-focus" );
			},
			"blur": function() {
				this._removeClass( this.label, null, "ui-state-focus ui-visual-focus" );
			}
		} );
	},

	_readType: function() {
		var nodeName = this.element[ 0 ].nodeName.toLowerCase();
		this.type = this.element[ 0 ].type;
		if ( nodeName !== "input" || !/radio|checkbox/.test( this.type ) ) {
			$.error( "Can't create checkboxradio on element.nodeName=" + nodeName +
				" and element.type=" + this.type );
		}
	},

	// Support jQuery Mobile enhanced option
	_enhance: function() {
		this._updateIcon( this.element[ 0 ].checked );
	},

	widget: function() {
		return this.label;
	},

	_getRadioGroup: function() {
		var name = this.element[ 0 ].name,
			that = this,
			radios = $( [] );

		if ( name ) {
			name = $.ui.escapeSelector( name );
			radios = this.formParent.find( "[name='" + $.ui.escapeSelector( name ) + "']" ).filter( function() {
				var form = $( this ).form();
				return ( form.length ? form : $( "body" ) )[ 0 ] === that.formParent[ 0 ];
			} );
		}
		return radios.not( this.element );
	},

	_toggleClasses: function() {
		var checked = this.element[ 0 ].checked;
		this._toggleClass( this.label, "ui-checkboxradio-checked", "ui-state-active", checked );

		if ( this.options.icon && this.type === "checkbox" ) {

			// We add ui-state-highlight to change the icon color
			this._toggleClass( this.icon, null, "ui-icon-check ui-state-highlight", checked )
				._toggleClass( this.icon, null, "ui-icon-blank", !checked );
		}
		if ( this.type === "radio" ) {
			this._getRadioGroup()
				.each( function() {
					var instance = $( this ).checkboxradio( "instance" );

					if ( instance ) {
						instance._removeClass( instance.label,
							"ui-checkboxradio-checked", "ui-state-active" );
					}
				} );
		}
	},

	_destroy: function() {
		var formCount = this.formParent.data( "uiCheckboxradioCount" ) - 1;

		this.formParent.data( "uiCheckboxradioCount", formCount );

		if ( formCount === 0 ) {
			this.formParent.off( "reset." + this.widgetFullName, formResetHandler );
		}

		if ( this.icon ) {
			this.icon.remove();
			this.iconSpace.remove();
		}
	},

	_setOption: function( key, value ) {

		// We don't alow the value to be set to nothing
		if ( key === "label" && !value ) {
			return;
		}

		this._super( key, value );

		if ( key === "disabled" ) {
			this._toggleClass( this.label, null, "ui-state-disabled", value );
			this.element[ 0 ].disabled = value;

			// Don't refresh if disabled
			return;
		}
		this.refresh();
	},

	_updateIcon: function( checked ) {
		var toAdd = "ui-icon ui-icon-background ";

		if ( this.options.icon ) {
			if ( !this.icon ) {
				this.icon = $( "<span>" );
				this.iconSpace = $( "<span> </span>" );
				this._addClass( this.iconSpace, "ui-checkboxradio-icon-space" );
			}

			if ( this.type === "checkbox" ) {
				toAdd += checked ? "ui-icon-check" : "ui-icon-blank";
				this._removeClass( this.icon, null, checked ? "ui-icon-blank" : "ui-icon-check" );
			} else {
				toAdd += "ui-icon-blank";
			}
			this._addClass( this.icon, "ui-checkboxradio-icon", toAdd );
			if ( !checked ) {
				this._removeClass( this.icon, null, "ui-icon-check" );
			}
			this.icon.prependTo( this.label ).after( this.iconSpace );
		} else if ( this.icon !== undefined ) {
			this.icon.remove();
			this.iconSpace.remove();
			delete this.icon;
		}
	},

	_updateLabel: function() {

		// Remove the contents of the label ( minus the icon, icon space, and input )
		this.label.contents().not( this.element.add( this.icon ).add( this.iconSpace ) ).remove();
		this.label.append( this.options.label );
	},

	refresh: function() {
		var checked = this.element[ 0 ].checked,
			isDisabled = this.element[ 0 ].disabled;

		this._updateIcon( checked );
		this._toggleClass( this.label, "ui-checkboxradio-checked", "ui-state-active", checked );
		if ( this.options.label !== null ) {
			this._updateLabel();
		}

		if ( isDisabled !== this.options.disabled ) {
			this._setOptions( { "disabled": isDisabled } );
		}
	}

} );

return $.ui.checkboxradio;

} ) );