/**
 * Conditional Fields for jQuery
 *
 * @package WPZincDashboardWidget
 * @author WP Zinc
 */

(function( $ ) {

	"use strict";

	/**
	 * Create .conditional() function
	 *
	 * @param object options Override Default Settings
	 */
	$.fn.conditional = function(options) {
		// Default Settings.
		var settings = $.extend(
			{
				data: 'conditional',
				value: 'conditional-value',
				displayOnEnabled: 'conditional-display'
			},
			options
		);

		// Setup conditionals on each DOM element.
		this.each(
			function() {
				// Check for conditional elements.
				if ( typeof $( this ).data( settings.data ) === 'undefined' ) {
					return true;
				}

				// Setup vars.
				var conditionalElements,
				displayOnEnabled,
				value,
				displayElements;

				// Toggle + toggle on change.
				$( this ).on(
					'change',
					function() {
						// List the DOM elements to toggle.
						conditionalElements = $( this ).data( settings.data ).split( ',' );

						// Determine whether to display DOM elements when the input is 'enabled'.
						displayOnEnabled = $( this ).data( settings.displayOnEnabled );
						if ( typeof displayOnEnabled === 'undefined' ) {
							displayOnEnabled = true;
						}

						// Determine the value required to display elements.
						value = $( this ).data( settings.value );
						if ( typeof value === 'undefined' ) {
							value = '';
						} else {
							value = String( value ).split( ',' );
						}

						// By default, don't display elements.
						displayElements = false;

						// Determine whether to display relational elements or not.
						switch ( $( this ).attr( 'type' ) ) {
							case 'checkbox':
								if ( displayOnEnabled ) {
									displayElements = $( this ).is( ':checked' );
								} else {
									displayElements = ( $( this ).is( ':checked' ) ? false : true );
								}
								break;

							default:
								if ( displayOnEnabled ) {
									if ( value.length > 0 ) {
										displayElements = ( ( value.indexOf( String( $( this ).val() ) ) == -1 ) ? false : true );
									} else {
										displayElements = ( ( $( this ).val() === '' || $( this ).val() === '0' ) ? false : true );
									}
								} else {
									if ( value.length > 0 ) {
										displayElements = ( ( value.indexOf( String( $( this ).val() ) ) == -1 ) ? true : false );
									} else {
										displayElements = ( ( $( this ).val() === '' || $( this ).val() === '0' ) ? true : false );
									}
								}
								break;
						}

						// Show/hide elements.
						var length = conditionalElements.length;
						for (var i = 0; i < length; i++) {
							// Check if we are finding an element by ID or class.
							var conditionalElement;
							if ( $( '#' + conditionalElements[i] ).length > 0 ) {
								conditionalElement = $( '#' + conditionalElements[i] );
							} else {
								conditionalElement = $( '.' + conditionalElements[i], $( this ).parent() );
							}

							if ( displayElements ) {
								$( conditionalElement ).fadeIn( 300 );
							} else {
								$( conditionalElement ).fadeOut( 300 );
							}
						}
					}
				);

				// Trigger a change on init so we run the above routine.
				$( this ).trigger( 'change' );
			}
		);

		// Return DOM elements.
		return this;
	};

} )( jQuery );

/**
 * Initialize.
 */
jQuery( document ).ready(
	function( $ ) {

		$( 'input,select' ).conditional();

	}
);
