/**!
 * wp-color-picker-alpha
 *
 * Overwrite Automattic Iris for enabled Alpha Channel in wpColorPicker
 * Only run in input and is defined data alpha in true
 *
 * Version: 2.0
 * https://github.com/kallookoo/wp-color-picker-alpha
 * Licensed under the GPLv2 license.
 */
( function( $ ) {

	// Variable for some backgrounds ( grid )
	var image = '',

		// Html stuff for wpColorPicker copy of the original color-picker.js
		_before =
			'<button type="button" class="button wp-color-result" aria-expanded="false"><span class="wp-color-result-text"></span></button>',
		_after = '<div class="wp-picker-holder" />',
		_wrap = '<div class="wp-picker-container" />',
		_button = '<input type="button" class="button button-small" />',
		_wrappingLabel = '<label></label>',
		_wrappingLabelText = '<span class="screen-reader-text"></span>';

	/**
	 * Overwrite Color
	 * for enable support rbga
	 */
	Color.fn.toString = function() {
		if ( 1 > this._alpha ) {
			return this.toCSS( 'rgba', this._alpha ).replace( /\s+/g, '' );
		}

		hex = parseInt( this._color, 10 ).toString( 16 );

		if ( this.error ) {
			return '';
		}

		if ( 6 > hex.length ) {
			hex = ( '00000' + hex ).substr( -6 );
		}

		return '#' + hex;
	};

	/**
	 * Overwrite wpColorPicker
	 */
	$.widget( 'wp.wpColorPicker', $.wp.wpColorPicker, {

		/**
		 * @summary Creates the color picker.
		 *
		 * Creates the color picker, sets default values, css classes and wraps it all in HTML.
		 *
		 * @access private
		 *
		 * @returns {void}
		 */
		_create: function() {

			// Return early if Iris support is missing.
			if ( ! $.support.iris ) {
				return;
			}

			var self = this,
				el = self.element;

			// Override default options with options bound to the element.
			$.extend( self.options, el.data() );

			// Create a color picker which only allows adjustments to the hue.
			if ( 'hue' === self.options.type ) {
				return self._createHueOnly();
			}

			// Bind the close event.
			self.close = $.proxy( self.close, self );

			self.initialValue = el.val();

			// Add a CSS class to the input field.
			el.addClass( 'wp-color-picker' );

			/*
			 * Check if there's already a wrapping label, e.g. in the Customizer.
			 * If there's no label, add a default one to match the Customizer template.
			 */
			if ( ! el.parent( 'label' ).length ) {

				// Wrap the input field in the default label.
				el.wrap( _wrappingLabel );

				// Insert the default label text.
				self.wrappingLabelText = $( _wrappingLabelText )
					.insertBefore( el )
					.text( wpColorPickerL10n.defaultLabel );
			}

			/*
			 * At this point, either it's the standalone version or the Customizer
			 * one, we have a wrapping label to use as hook in the DOM, let's store it.
			 */
			self.wrappingLabel = el.parent();

			// Wrap the label in the main wrapper.
			self.wrappingLabel.wrap( _wrap );

			// Store a reference to the main wrapper.
			self.wrap = self.wrappingLabel.parent();

			// Set up the toggle button and insert it before the wrapping label.
			self.toggler = $( _before )
				.insertBefore( self.wrappingLabel )
				.css( { backgroundColor: self.initialValue } );

			// Set the toggle button span element text.
			self.toggler.find( '.wp-color-result-text' ).text( wpColorPickerL10n.pick );

			// Set up the Iris container and insert it after the wrapping label.
			self.pickerContainer = $( _after ).insertAfter( self.wrappingLabel );

			// Store a reference to the Clear/Default button.
			self.button = $( _button );

			// Set up the Clear/Default button.
			if ( self.options.defaultColor ) {
				self.button
					.addClass( 'wp-picker-default' )
					.val( wpColorPickerL10n.defaultString )
					.attr( 'aria-label', wpColorPickerL10n.defaultAriaLabel );
			} else {
				self.button
					.addClass( 'wp-picker-clear' )
					.val( wpColorPickerL10n.clear )
					.attr( 'aria-label', wpColorPickerL10n.clearAriaLabel );
			}

			// Wrap the wrapping label in its wrapper and append the Clear/Default button.
			self.wrappingLabel
				.wrap( '<span class="wp-picker-input-wrap hidden" />' )
				.after( self.button );

			/*
			 * The input wrapper now contains the label+input+Clear/Default button.
			 * Store a reference to the input wrapper: we'll use this to toggle
			 * the controls visibility.
			 */
			self.inputWrapper = el.closest( '.wp-picker-input-wrap' );

			el.iris( {
				target: self.pickerContainer,
				hide: self.options.hide,
				width: self.options.width,
				mode: self.options.mode,
				palettes: self.options.palettes,

				/**
				 * @summary Handles the onChange event if one has been defined in the options.
				 *
				 * Handles the onChange event if one has been defined in the options and additionally
				 * sets the background color for the toggler element.
				 *
				 * @param {Event} event    The event that's being called.
				 * @param {HTMLElement} ui The HTMLElement containing the color picker.
				 *
				 * @returns {void}
				 */
				change: function( event, ui ) {
					if ( self.options.alpha ) {
						self.toggler.css( {
							position: 'relative'
						} );
						if ( 0 == self.toggler.find( 'span.color-alpha' ).length ) {
							self.toggler.append( '<span class="color-alpha" />' );
						}
						self.toggler.find( 'span.color-alpha' ).css( {
							background: ui.color.toString()
						} );
						self.toggler.css( { backgroundColor: ui.color.toString() } );
					}

					if ( $.isFunction( self.options.change ) ) {
						self.options.change.call( this, event, ui );
					}
				}
			} );

			el.val( self.initialValue );
			self._addListeners();

			// Force the color picker to always be closed on initial load.
			if ( ! self.options.hide ) {
				self.toggler.click();
			}
		},

		/**
		 * @summary Binds event listeners to the color picker.
		 *
		 * @access private
		 *
		 * @returns {void}
		 */
		_addListeners: function() {
			var self = this;

			/**
			 * @summary Prevent any clicks inside this widget from leaking to the top and closing it.
			 *
			 * @param {Event} event The event that's being called.
			 *
			 * @returs {void}
			 */
			self.wrap.on( 'click.wpcolorpicker', function( event ) {
				event.stopPropagation();
			} );

			/**
			 * @summary Open or close the color picker depending on the class.
			 */
			self.toggler.click( function() {
				if ( self.toggler.hasClass( 'wp-picker-open' ) ) {
					self.close();
				} else {
					self.open();
				}
			} );

			/**
			 * @summary Checks if value is empty when changing the color in the color picker.
			 *
			 * Checks if value is empty when changing the color in the color picker.
			 * If so, the background color is cleared.
			 *
			 * @param {Event} event The event that's being called.
			 *
			 * @returns {void}
			 */
			self.element.on( 'change', function( event ) {

				// Empty or Error = clear
				if ( '' === $( this ).val() || self.element.hasClass( 'iris-error' ) ) {
					if ( self.options.alpha ) {
						self.toggler.find( 'span.color-alpha' ).css( 'backgroundColor', '' );
					} else {
						self.toggler.css( 'backgroundColor', '' );
					}

					// Fire clear callback if we have one
					if ( $.isFunction( self.options.clear ) ) {
						self.options.clear.call( this, event );
					}
				}
			} );

			/**
			 * @summary Enables the user to clear or revert the color in the color picker.
			 *
			 * Enables the user to either clear the color in the color picker or revert back to the default color.
			 *
			 * @param {Event} event The event that's being called.
			 *
			 * @returns {void}
			 */
			self.button.on( 'click', function( event ) {
				if ( $( this ).hasClass( 'wp-picker-clear' ) ) {
					self.element.val( '' );
					if ( self.options.alpha ) {
						self.toggler.find( 'span.color-alpha' ).css( 'backgroundColor', '' );
					} else {
						self.toggler.css( 'backgroundColor', '' );
					}

					if ( $.isFunction( self.options.clear ) ) {
						self.options.clear.call( this, event );
					}
				} else if ( $( this ).hasClass( 'wp-picker-default' ) ) {
					self.element.val( self.options.defaultColor ).change();
				}
			} );
		}
	} );

	/**
	 * Overwrite iris
	 */
	$.widget( 'a8c.iris', $.a8c.iris, {
		_create: function() {
			this._super();

			// Global option for check is mode rbga is enabled
			this.options.alpha = this.element.data( 'alpha' ) || false;

			// Is not input disabled
			if ( ! this.element.is( ':input' ) ) {
				this.options.alpha = false;
			}

			if ( 'undefined' !== typeof this.options.alpha && this.options.alpha ) {
				var self = this,
					el = self.element,
					_html =
						'<div class="iris-strip iris-slider iris-alpha-slider"><div class="iris-slider-offset iris-slider-offset-alpha"></div></div>',
					aContainer = $( _html ).appendTo(
						self.picker.find( '.iris-picker-inner' )
					),
					aSlider = aContainer.find( '.iris-slider-offset-alpha' ),
					controls = {
						aContainer: aContainer,
						aSlider: aSlider
					};

				if ( 'undefined' !== typeof el.data( 'custom-width' ) ) {
					self.options.customWidth = parseInt( el.data( 'custom-width' ) ) || 0;
				} else {
					self.options.customWidth = 100;
				}

				// Set default width for input reset
				self.options.defaultWidth = el.width();

				// Update width for input
				if (
					1 > self._color._alpha ||
					-1 != self._color.toString().indexOf( 'rgb' )
				) {
					el.width(
						parseInt( self.options.defaultWidth + self.options.customWidth )
					);
				}

				// Push new controls
				$.each( controls, function( k, v ) {
					self.controls[k] = v;
				} );

				// Change size strip and add margin for sliders
				self.controls.square.css( { 'margin-right': '0' } );
				var emptyWidth =
						self.picker.width() - self.controls.square.width() - 20,
					stripsMargin = emptyWidth / 6,
					stripsWidth = emptyWidth / 2 - stripsMargin;

				$.each( [ 'aContainer', 'strip' ], function( k, v ) {
					self.controls[v]
						.width( stripsWidth )
						.css( { 'margin-left': stripsMargin + 'px' } );
				} );

				// Add new slider
				self._initControls();

				// For updated widget
				self._change();
			}
		},
		_initControls: function() {
			this._super();

			if ( this.options.alpha ) {
				var self = this,
					controls = self.controls;

				controls.aSlider.slider( {
					orientation: 'vertical',
					min: 0,
					max: 100,
					step: 1,
					value: parseInt( self._color._alpha * 100 ),
					slide: function( event, ui ) {

						// Update alpha value
						self._color._alpha = parseFloat( ui.value / 100 );
						self._change.apply( self, arguments );
					}
				} );
			}
		},
		_change: function() {
			this._super();

			var self = this,
				el = self.element;

			if ( this.options.alpha ) {
				var controls = self.controls,
					alpha = parseInt( self._color._alpha * 100 ),
					color = self._color.toRgb(),
					gradient = [
						'rgb(' + color.r + ',' + color.g + ',' + color.b + ') 0%',
						'rgba(' + color.r + ',' + color.g + ',' + color.b + ', 0) 100%'
					],
					defaultWidth = self.options.defaultWidth,
					customWidth = self.options.customWidth,
					target = self.picker
						.closest( '.wp-picker-container' )
						.find( '.wp-color-result' );

				// Generate background slider alpha, only for CSS3 old browser
				controls.aContainer.css( {
					background:
						'linear-gradient(to bottom, ' +
						gradient.join( ', ' ) +
						'), url(' +
						image +
						')'
				} );

				if ( target.hasClass( 'wp-picker-open' ) ) {

					// Update alpha value
					controls.aSlider.slider( 'value', alpha );

					/**
					 * Disabled change opacity in default slider Saturation ( only is alpha enabled )
					 * and change input width for view all value
					 */
					if ( 1 > self._color._alpha ) {
						controls.strip.attr(
							'style',
							controls.strip
								.attr( 'style' )
								.replace(
									/rgba\(([0-9]+,)(\s+)?([0-9]+,)(\s+)?([0-9]+)(,(\s+)?[0-9\.]+)\)/g,
									'rgb($1$3$5)'
								)
						);
						el.width( parseInt( defaultWidth + customWidth ) );
					} else {
						el.width( defaultWidth );
					}
				}
			}

			var reset = el.data( 'reset-alpha' ) || false;

			if ( reset ) {
				self.picker
					.find( '.iris-palette-container' )
					.on( 'click.palette', '.iris-palette', function() {
						self._color._alpha = 1;
						self.active = 'external';
						self._change();
					} );
			}
		},
		_addInputListeners: function( input ) {
			var self = this,
				debounceTimeout = 100,
				callback = function( event ) {
					var color = new Color( input.val() ),
						val = input.val();

					input.removeClass( 'iris-error' );

					// We gave a bad color
					if ( color.error ) {

						// Don't error on an empty input
						if ( '' !== val ) {
							input.addClass( 'iris-error' );
						}
					} else {
						if ( color.toString() !== self._color.toString() ) {

							// Let's not do this on keyup for hex shortcodes
							if ( ! ( 'keyup' === event.type && val.match( /^[0-9a-fA-F]{3}$/ ) ) ) {
								self._setOption( 'color', color.toString() );
							}
						}
					}
				};

			input
				.on( 'change', callback )
				.on( 'keyup', self._debounce( callback, debounceTimeout ) );

			// If we initialized hidden, show on first focus. The rest is up to you.
			if ( self.options.hide ) {
				input.on( 'focus', function() {
					self.show();
				} );
			}
		}
	} );
} ( jQuery ) );