( function( $, undef ){

	// html stuff

	var _before = '<a tabindex="0" class="wp-color-result" />',

		_after = '<div class="wp-picker-holder" />',

		_wrap = '<div class="wp-picker-container" />',

		_button = '<input type="button" class="button button-small hidden" />';

	// jQuery UI Widget constructor

	var ColorPicker = {

		options: {

			defaultColor: false,

			change: false,

			clear: false,

			hide: true,

			palettes: true

		},

		_create: function() {

			// bail early for IE < 8

			if ( $.browser.msie && parseInt( $.browser.version, 10 ) < 8 )

				return;

			var self = this;

			var el = self.element;

			$.extend( self.options, el.data() );

			self.initialValue = el.val();

			// Set up HTML structure, hide things

			el.addClass( 'wp-color-picker' ).hide().wrap( _wrap );

			self.wrap = el.parent();

			self.toggler = $( _before ).insertBefore( el ).css( { backgroundColor: self.initialValue } ).attr( "title", wpColorPickerL10n.pick ).attr( "data-current", wpColorPickerL10n.current );

			self.pickerContainer = $( _after ).insertAfter( el );

			self.button = $( _button );

			if ( self.options.defaultColor )

				self.button.addClass( 'wp-picker-default' ).val( wpColorPickerL10n.defaultString );

			else

				self.button.addClass( 'wp-picker-clear' ).val( wpColorPickerL10n.clear );

			el.wrap('<span class="wp-picker-input-wrap" />').after(self.button);

			el.iris( {

				target: self.pickerContainer,

				hide: true,

				width: 255,

				mode: 'hsv',

				palettes: self.options.palettes,

				change: function( event, ui ) {

					self.toggler.css( { backgroundColor: ui.color.toString() } );

					// check for a custom cb

					if ( $.isFunction( self.options.change ) )

						self.options.change.call( this, event, ui );

				}

			} );

			el.val( self.initialValue );

			self._addListeners();

			if ( ! self.options.hide )

				self.toggler.click();

		},

		_addListeners: function() {

			var self = this;

			self.toggler.click( function( event ){

				event.stopPropagation();

				self.element.toggle().iris( 'toggle' );

				self.button.toggleClass('hidden');

				self.toggler.toggleClass( 'wp-picker-open' );

				// close picker when you click outside it

				if ( self.toggler.hasClass( 'wp-picker-open' ) )

					$( "body" ).on( 'click', { wrap: self.wrap, toggler: self.toggler }, self._bodyListener );

				else

					$( "body" ).off( 'click', self._bodyListener );

			});

			self.element.change(function( event ) {

				var me = $(this),

					val = me.val();

				// Empty = clear

				if ( val === '' || val === '#' ) {

					self.toggler.css('backgroundColor', '');

					// fire clear callback if we have one

					if ( $.isFunction( self.options.clear ) )

						self.options.clear.call( this, event );

				}

			});

			// open a keyboard-focused closed picker with space or enter

			self.toggler.on('keyup', function( e ) {

				if ( e.keyCode === 13 || e.keyCode === 32 ) {

					e.preventDefault();

					self.toggler.trigger('click').next().focus();

				}

			});

			self.button.click( function( event ) {

				var me = $(this);

				if ( me.hasClass( 'wp-picker-clear' ) ) {

					self.element.val( '' );

					self.toggler.css('backgroundColor', '');

					if ( $.isFunction( self.options.clear ) )

						self.options.clear.call( this, event );

				} else if ( me.hasClass( 'wp-picker-default' ) ) {

					self.element.val( self.options.defaultColor ).change();

				}

			});

		},

		_bodyListener: function( event ) {

			if ( ! event.data.wrap.find( event.target ).length )

					event.data.toggler.click();

		},

		// $("#input").wpColorPicker('color') returns the current color

		// $("#input").wpColorPicker('color', '#bada55') to set

		color: function( newColor ) {

			if ( newColor === undef )

				return this.element.iris( "option", "color" );

			this.element.iris( "option", "color", newColor );

		},

		//$("#input").wpColorPicker('defaultColor') returns the current default color

		//$("#input").wpColorPicker('defaultColor', newDefaultColor) to set

		defaultColor: function( newDefaultColor ) {

			if ( newDefaultColor === undef )

				return this.options.defaultColor;

			this.options.defaultColor = newDefaultColor;

		}

	}

	$.widget( 'wp.wpColorPicker', ColorPicker );

}( jQuery ) );