<script>
    bundles = [];
{% for variant in product.variants %}{% if variant.metafields.sva.bundled %}
    bundles['{{ variant.id }}'] = jQuery.parseJSON('{{ variant.metafields.sva.bundled }}');
{% endif %}{% endfor %}

    var process = function (target, results) {
        var deferred = $.Deferred();

        $.ajax({
            dataType: "json",
            url: "/products/" + target.handle + ".js"
        }).done(function (product, textStatus, jqXHR) {
            var multiplier = target.multiplier || 1,
                    variants = jQuery.grep(product.variants, function (variant) { // find matching variants
                        return jQuery.inArray(variant.id, target.variants) > -1
                    });

            jQuery.each(variants, function (i, variant) {
                results.push({
                    variant: variant.id,
                    available: (variant.inventory_quantity >= multiplier),
                    quantity: variant.inventory_quantity,
                    multiplier: target.multiplier
                })
            });
        }).fail(function (jqXHR, textStatus, errorThrown) {
            if (jqXHR.status == 404) {
                for (var i = 0; i < target.variants.length; i++) {
                    results.push({
                        variant: target.variants[i],
                        available: 0,
                        quantity: 0,
                        multiplier: target.multiplier
                    })
                }
            } else {
              console.log([jqXHR, textStatus, errorThrown]);
            }
        }).always(function () {
            deferred.resolve();
        });

        return deferred.promise();
    }

    var bundled = function (variant, callback) {
        var id = variant.id,
            targets = bundles[id],
            quantity = (variant.inventory_management == 'shopify' && variant.inventory_quantity) || 100;

        if (targets) {
            var processes = [], results = [], i;

            jQuery.each(targets, function (n, target) {
                processes.push(process(target, results));
            })

            $.when.apply($, processes).done(function () {
                var available = true;
                for (i = 0; i < results.length; i++) {
                    if (results[i].available == false) {
                        available = false;
                        quantity = 0;
                        break;
                    } else {
                        if (quantity > results[i].quantity) {
                            quantity = results[i].quantity;
                        }
                    }
                }
                callback({available: available, quantity: quantity});
            });

            return true;
        } else {
            callback({available: true, quantity: quantity});
            return false;
        }
    }
</script>