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/*
 * Yandex.Metrika ecommerce helper script
 * Docs: https://yandex.ru/support/metrika/data/e-commerce.xml
 * Author: isoshin@outlook.com
 */

window.dataLayer = window.dataLayer || [];

function ecommDetail(products) {
    products = [].concat(products);
    if (products.length) {
        window.dataLayer.push({
            "ecommerce": {
                "detail": {
                    "products": products
                }
            }
        });
    }
}

function ecommAdd(products) {
    products = [].concat(products);
    if (products.length) {
        window.dataLayer.push({
            "ecommerce": {
                "add": {
                    "products": products
                }
            }
        });
    }
}

function ecommRemove(products) {
    products = [].concat(products);
    if (products.length) {
        window.dataLayer.push({
            "ecommerce": {
                "remove": {
                    "products": products
                }
            }
        });
    }
}

function ecommPurchase(order, products) {
    products = [].concat(products);
    if (products.length) {
        window.dataLayer.push({
            "ecommerce": {
                "purchase": {
                    "actionField": order,
                    "products": products
                }
            }
        });
    }
}

(function($) {

    var callbacks = {
        'toCartCallback': function(form) {
            var $f = $(form);
            ecommAdd({
                'name': $f.find('input[name=shk-name]').val(),
                'id': $f.find('input[name=shk-id]').val(),
                'category': $f.find('input[name=shk-category]').val(),
                'price': $f.find('input[name=shk-price]').val(),
                'quantity': $f.find('input[name=shk-count]').val()
            });
            return true;
        }
    };

    $(window).on('load', function() {
        // handle details
        var products = [];
        $('[itemscope][itemtype="http://schema.org/Product"][data-ecomm-collect]').each(function() {
            var $t = $(this);
            products.push({
                'name': $.trim($t.find('[itemprop=name]').text()),
                'id': $t.find('[itemprop=productID]').attr('content'),
                'category': $t.find('[itemprop=category]').attr('content'),
                'price': $t.find('[itemprop=offers] [itemprop=price]').text()
            });
        });
        ecommDetail(products);

        // set callbacks
        if (typeof SHKtoCartCallback == 'undefined') 
            window.SHKtoCartCallback = callbacks.toCartCallback;

        // handle purchase
        if (typeof ecommOrderData != 'undefined') {
            ecommPurchase({'id': ecommOrderData.order_id, 'revenue': ecommOrderData.revenue}, ecommOrderData.products);
        }

        // remove item
        $('#shopCart .shk-del').on('click', function() {
            var row = $(this).closest('tr[rel=productItem]');
            ecommRemove({
                'id': row.find('input[rel=productItemId]').val(),
                'name': row.find('.prod-title [rel=productItemName]').text()
            });
        });
    });
})(jQuery);