/* ----------------------------------------------------------------------------
 * Easy!Appointments - Open Source Web Scheduler
 *
 * @package     EasyAppointments
 * @author      A.Tselegidis <alextselegidis@gmail.com>
 * @copyright   Copyright (c) 2013 - 2016, Alex Tselegidis
 * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
 * @link        http://easyappointments.org
 * @since       v1.0.0
 * ---------------------------------------------------------------------------- */

window.BackendServices = window.BackendServices || {};

/**
 * Backend Services
 *
 * This namespace handles the js functionality of the backend services page.
 *
 * @module BackendServices
 */
(function(exports) {

    'use strict';

    /**
     * Contains the basic record methods for the page.
     *
     * @type {ServicesHelper|CategoriesHelper}
     */
    var helper;

    var servicesHelper = new ServicesHelper(); 
    var categoriesHelper = new CategoriesHelper();

    /**
     * Default initialize method of the page.
     *
     * @param {Boolean} bindEventHandlers Optional (true), determines whether to bind the  default event handlers.
     */
    exports.initialize =  function(bindEventHandlers) {
        bindEventHandlers = bindEventHandlers || true;

        // Fill available service categories listbox.
        $.each(GlobalVariables.categories, function(index, category) {
            var option = new Option(category.name, category.id);
            $('#service-category').append(option);
        });
        $('#service-category').append(new Option('- ' + EALang['no_category'] + ' -', null)).val('null');

        $('#service-duration').spinner({
            min: 0,
            disabled: true // default
        });

        // Instantiate helper object (service helper by default).
        helper = new ServicesHelper();
        helper.resetForm();
        helper.filter('');

        $('#filter-services .results').jScrollPane();
        $('#filter-categories .results').jScrollPane();

        if (bindEventHandlers) {
            _bindEventHandlers();
        }
    };

    /**
     * Binds the default event handlers of the backend services page.
     *
     * Do not use this method if you include the "BackendServices" namespace on another page.
     */
    function _bindEventHandlers() {
        /**
         * Event: Page Tab Button "Click"
         *
         * Changes the displayed tab.
         */
        $('.tab').click(function() {
            $(this).parent().find('.active').removeClass('active');
            $(this).addClass('active');
            $('.tab-content').hide();

            if ($(this).hasClass('services-tab')) { // display services tab
                $('#services').show();
                helper = servicesHelper;
            } else if ($(this).hasClass('categories-tab')) { // display categories tab
                $('#categories').show();
                helper = categoriesHelper;
            }

            helper.resetForm();
            helper.filter('');
            $('.filter-key').val('');
            Backend.placeFooterToBottom();
        });

        servicesHelper.bindEventHandlers(); 
        categoriesHelper.bindEventHandlers(); 
    }

    /**
     * Update the service category listbox.
     *
     * Use this method every time a change is made to the service categories db table.
     */
    exports.updateAvailableCategories = function() {
        var postUrl = GlobalVariables.baseUrl + '/index.php/backend_api/ajax_filter_service_categories',
            postData = {
                csrfToken: GlobalVariables.csrfToken,
                key: ''
            };

        $.post(postUrl, postData, function(response) {
            if (!GeneralFunctions.handleAjaxExceptions(response)) {
                return;
            }

            GlobalVariables.categories = response;
            var $select = $('#service-category');
            $select.empty();
            $.each(response, function(index, category) {
                var option = new Option(category.name, category.id);
                $select.append(option);
            });
            $select.append(new Option('- ' + EALang['no_category'] + ' -', null)).val('null');
        }, 'json').fail(GeneralFunctions.ajaxFailureHandler);
    }

})(window.BackendServices);