/* --------------------------------------------------------------
 shipping_calculator.js 2016-05-19
 Gambio GmbH
 http://www.gambio.de
 Copyright (c) 2016 Gambio GmbH
 Released under the GNU General Public License (Version 2)
 [http://www.gnu.org/licenses/gpl-2.0.html]
 --------------------------------------------------------------
 */

/**
 * Widget that updates the shipping cost box at the
 * shopping cart page
 */
gambio.widgets.module(
    'shipping_calculator',

    ['form', 'xhr'],

    function (data) {

        'use strict';

// ########## VARIABLE INITIALIZATION ##########

        var $this = $(this),
            $body = $('body'),
            defaults = {
                // URL at which the request is send.
                url: 'shop.php?do=CartShippingCosts',
                selectorMapping: {
                    gambioUltraCosts: '.cart_shipping_costs_gambio_ultra_dropdown, .order-total-shipping-info-gambioultra-costs',
                    shippingWeight: '.shipping-calculator-shipping-weight-unit, .shipping-weight-value',
                    shippingCost: '.shipping-calculator-shipping-costs, .order-total-shipping-info, .shipping-cost-value',
                    shippingCalculator: '.shipping-calculator-shipping-modules',
                    invalidCombinationError: '#cart_shipping_costs_invalid_combination_error'
                }
            },
            options = $.extend(true, {}, defaults, data),
            module = {};


// ########## EVENT HANDLER ##########

        /**
         * Function that requests the given URL and
         * fills the page with the delivered data
         * @private
         */
        var _updateShippingCosts = function () {
            var formdata = jse.libs.form.getData($this);

            jse.libs.xhr.ajax({url: options.url, data: formdata}).done(function (result) {
                jse.libs.theme.helpers.fill(result.content, $body, options.selectorMapping);
            });

            // update modal content source
            var value = $this.find('select[name="cart_shipping_country"]').val();
            $('#shipping-information-layer.hidden select[name="cart_shipping_country"] option').attr('selected', false);
            $('#shipping-information-layer.hidden select[name="cart_shipping_country"] option[value="' + value + '"]')
                .attr('selected', true);
        };


// ########## INITIALIZATION ##########

        /**
         * Init function of the widget
         * @constructor
         */
        module.init = function (done) {

            $this.on('change update', _updateShippingCosts);

            done();

        };

        // Return data to widget engine
        return module;
    });