(function ($, _) {
    var RazziProductsFilterWidget = function () {
        var self = this;

        self.ajax = null;

        // Init.
        self.init();

        // Methods.
        self.init = self.init.bind(self);
        self.initDropdowns = self.initDropdowns.bind(self);
        self.removeSliderInputs = self.removeSliderInputs.bind(self);
        self.sendAjaxRequest = self.sendAjaxRequest.bind(self);

        // Events.
        $('.products-filter-widget')
            .on('input', '.products-filter__search-box', {widget: self}, self.searchTerms)
            .on('click', '.products-filter--collapsible .products-filter__option-toggler', {widget: self}, self.toggleCollapse)
            .on('click', '.products-filter__option-name, .products-filter__options .swatch', {widget: self}, self.toggleItem)
            .on('change', 'input, select', {widget: self}, self.triggerItemChange)
            .on('click', '.reset-button', {widget: self}, self.resetFilters)
            .on('click', '.clear-button', {widget: self}, self.clearFilters)
            .on('click', '.remove-filtered', {widget: self}, self.removeFiltered)
            .on('submit', 'form.ajax-filter', {widget: self}, self.ajaxSearch);

        $(document.body)
            .on('price_slider_create', self.addListenerToSlider)
            .on('razzi_products_filter_change', {widget: self}, self.instantSearch)
            .on('razzi_products_filter_request_success', self.updateURL)
            .on('razzi_products_filter_request_success', {widget: self}, self.updateForm)
            .on('razzi_products_filter_widget_updated', {widget: self}, self.initDropdowns)
            .on('razzi_products_filter_widget_updated', {widget: self}, self.initSliders);
    };

    RazziProductsFilterWidget.prototype.init = function () {
        var self = this;

        self.initDropdowns();
        self.removeSliderInputs();
    }

    RazziProductsFilterWidget.prototype.initDropdowns = function (event, form) {
        if (!$.fn.select2) {
            return;
        }

        var $container = form ? $(form) : $('.products-filter-widget'),
            direction = $(document.body).hasClass('rtl') ? 'rtl' : 'ltr';

        $('select', $container).each(function () {
            var $select = $(this),
                $searchBoxText = $select.prev('.products-filter__search-box'),
                searchText = $searchBoxText.length ? $searchBoxText.text() : false;

            $select.select2({
                dir: direction,
                width: '100%',
                minimumResultsForSearch: searchText ? 3 : -1,
                dropdownCssClass: 'products-filter-dropdown',
                dropdownParent: $select.parent()
            });
        });
    }

    RazziProductsFilterWidget.prototype.initSliders = function (event, form) {
        $(document.body).trigger('init_price_filter');

        event.data.widget.removeSliderInputs(form);
    }

    RazziProductsFilterWidget.prototype.removeSliderInputs = function (form) {
        var $container = form ? $(form) : $('.products-filter-widget');

        $('.widget_price_filter', $container).find('input[type=hidden]').not('[name=min_price], [name=max_price]').remove();
    }

    RazziProductsFilterWidget.prototype.searchTerms = function (event) {
        var $this = $(this),
            term = $this.children().val().toLowerCase(),
            $list = $this.next('.products-filter__options').find('.products-filter__option');

        if (term) {
            $list.hide().filter(function () {
                return $('.name', this).text().toLowerCase().indexOf(term) !== -1;
            }).show();
        } else {
            $list.show();
        }
    }

    RazziProductsFilterWidget.prototype.toggleCollapse = function (event) {
        var $option = $(this).closest('.products-filter__option'),
            $children = $option.children('ul');

        if (!$children.length) {
            return;
        }

        event.preventDefault();

        $children.stop(true, true).slideToggle(function () {
            $option.toggleClass('active');
        });
    }

    RazziProductsFilterWidget.prototype.toggleItem = function (event) {
        event.preventDefault();

        var $item = $(this).closest('.products-filter__option'),
            $filter = $item.closest('.filter'),
            $input = $item.closest('.products-filter__options').next('input[type=hidden]'),
            current = $input.val(),
            value = $item.data('value'),
            form = $item.closest('form').get(0),
            index = -1;

        if ($filter.hasClass('multiple')) {
            current = current ? current.split(',') : [];
            index = current.indexOf(value);
            index = (-1 !== index) ? index : current.indexOf(value.toString());

            if (index !== -1) {
                current = _.without(current, value);
            } else {
                current.push(value);
            }

            $input.val(current.join(','));
            $item.toggleClass('selected');

            $input.prop('disabled', current.length <= 0);

            if ($filter.hasClass('attribute')) {
                var $queryTypeInput = $input.next('input[name^=query_type_]');

                if ($queryTypeInput.length) {
                    $queryTypeInput.prop('disabled', current.length <= 1);
                }
            }
        } else {
            // @note: Ranges are always single selection.
            if ($item.hasClass('selected')) {
                $item.removeClass('selected');
                $input.val('').prop('disabled', true);

                if ($filter.hasClass('ranges')) {
                    $input.next('input[type=hidden]').val('').prop('disabled', true);
                }
            } else {
                $item.addClass('selected').siblings('.selected').removeClass('selected');
                $input.val(value).prop('disabled', false);

                if ($filter.hasClass('ranges')) {
                    $input.val(value.min).prop('disabled', !value.min);
                    $input.next('input[type=hidden]').val(value.max).prop('disabled', !value.max);
                }
            }
        }

        $(document.body).trigger('razzi_products_filter_change', [form]);
    }

    RazziProductsFilterWidget.prototype.triggerItemChange = function () {
        if ( $(this).parent().hasClass('products-filter__search-box') ) {
            return;
        }

        var form = $(this).closest('form').get(0);
        $(document.body).trigger('razzi_products_filter_change', [form]);
    }

    RazziProductsFilterWidget.prototype.addListenerToSlider = function () {
        var $slider = $('.products-filter-widget .price_slider.ui-slider');

        $slider.each(function () {
            var $el = $(this),
                form = $el.closest('form').get(0),
                onChange = $el.slider('option', 'change');

            $el.slider('option', 'change', function (event, ui) {
                onChange(event, ui);

                $(document.body).trigger('razzi_products_filter_change', [form]);
            });
        });
    }

    RazziProductsFilterWidget.prototype.resetFilters = function () {
        var $form = $(this).closest('form');

        $form.get(0).reset();
        $form.find('.selected').removeClass('selected');
        $form.find(':input').not('[type="button"], [type="submit"], [type="reset"]')
            .val('')
            .trigger('change')
            .filter('[type="hidden"],[name="min_price"], [name="max_price"]').prop('disabled', true);

        $form.trigger('submit');
        $(document.body).trigger('razzi_products_filter_reseted');
    }

    RazziProductsFilterWidget.prototype.clearFilters = function () {
        var $filter = $(this).closest('.products-filter__filter'),
            $form = $(this).closest('form');

        $filter.find('.selected').removeClass('selected');
        $filter.find(':input').not('[type="button"], [type="submit"], [type="reset"]')
            .val('')
            .trigger('change')
            .filter('[type="hidden"]').prop('disabled', true);
        $form.trigger('submit');
        $(document.body).trigger('razzi_products_filter_cleared');
    }

    RazziProductsFilterWidget.prototype.removeFiltered = function (event) {
        event.preventDefault();

        var self = event.data.widget,
            $el = $(this),
            $widget = $el.closest(' .products-filter-widget'),
            $form = $widget.find('form'),
            name = $el.data('name'),
            key = name.replace(/^filter_/g, ''),
            value = $el.data('value'),
            $filter = $widget.find('.filter.' + key);

        $el.remove();

        if ($filter.length) {
            var $input = $filter.find(':input[name=' + name + ']'),
                current = $input.val();

            if( name == 'price' ) {
                $filter.find(':input[name=min_price]').val('');
                $filter.find(':input[name=max_price]').val('');
                $filter.find('.products-filter__option').removeClass('selected');
            } else {
                if ($input.is('select')) {
                    $input.prop('selectedIndex', 0);
                    $input.trigger('change');
                } else {
                    current = current.replace(',' + value, '');
                    current = current.replace(value, '');
                    $input.val(current);

                    if ('' == current) {
                        $input.prop('disabled', true);
                    }

                    $filter.find('[data-value=' + value + ']').removeClass('selected');
                }
            }

            self.sendAjaxRequest($form);
        }
    }

    RazziProductsFilterWidget.prototype.ajaxSearch = function (event) {
        event.data.widget.sendAjaxRequest(this);

        return false;
    }

    RazziProductsFilterWidget.prototype.instantSearch = function (event, form) {
        var settings = $(form).data('settings');

        if (!settings.instant) {
            return;
        }

        event.data.widget.sendAjaxRequest(form);
    }

    RazziProductsFilterWidget.prototype.updateURL = function (event, response, url, form) {
        var settings = $(form).data('settings');

        if (!settings.change_url) {
            return;
        }

        if ('?' === url.slice(-1)) {
            url = url.slice(0, -1);
        }

        url = url.replace(/%2C/g, ',');

        history.pushState(null, '', url);
    }

    RazziProductsFilterWidget.prototype.updateForm = function (event, response, url, form) {
        var $widget = $(form).closest('.widget.products-filter-widget'),
            widgetId = $widget.attr('id'),
            $newWidget = $('#' + widgetId, response);

        if (!$newWidget.length) {
            return;
        }

        $('.filters', form).html($('.filters', $newWidget).html());
        $('.products-filter__activated', $widget).html($('.products-filter__activated', $newWidget).html());

        $(document.body).trigger('razzi_products_filter_widget_updated', [form]);
    }

    RazziProductsFilterWidget.prototype.sendAjaxRequest = function (form) {
        var self = this,
            $form = $(form),
            $container = $('#rz-shop-content ul.products'),
			$toolbar = $('#main .catalog-toolbar'),
            $inputs = $form.find(':input:not(:checkbox):not(:button)'),
            params = {},
            action = $form.attr('action'),
            separator = action.indexOf('?') !== -1 ? '&' : '?',
            url = action;

        params = $inputs.filter(function () {
            return this.value != '' && this.name != '';
        }).serializeObject();

        if (params.min_price && params.min_price == $inputs.filter('[name=min_price]').data('min')) {
            delete params.min_price;
        }

        if (params.max_price && params.max_price == $inputs.filter('[name=max_price]').data('max')) {
            delete params.max_price;
        }

        // the filer always contains "filter" param
        // so it is empty if the size less than 2
        if (_.size(params) > 1) {
            url += separator + $.param(params, true);
        }

        if (!$container.length) {
            $container = $('<ul class="products"/>');
            $('#rz-shop-content .woocommerce-info').replaceWith($container);
        }

        if (self.ajax) {
            self.ajax.abort();
        }

        $form.addClass('filtering');
        $container.addClass('loading').append('<li class="razzi-posts__loading"><span class="razzi-loading"></span> </li>');

        $(document.body).trigger('razzi_products_filter_before_send_request', $container);

        self.ajax = $.get(url, function (response) {
            var $html = $(response),
                $products = $html.find('#rz-shop-content ul.products'),
                $pagination = $container.closest('.rz-shop-content').find('.woocommerce-pagination');

            if (!$products.length) {
                var $info = $html.find('#main .woocommerce-info, #main .wc-block-components-notice-banner');
				$pagination.fadeOut();
				$container.html($info);
				$toolbar.fadeOut();
            } else {
                var $nav = $products.closest('.rz-shop-content').find('.woocommerce-pagination'),
                    $order = $('form.woocommerce-ordering');

                if ($nav.length) {
                    if ($pagination.length) {
                        $pagination.replaceWith($nav).fadeIn();
                    } else {
                        $container.after($nav);
                    }
                } else {
                    $pagination.fadeOut();
                }
				$toolbar.fadeIn();
                $products.children().each(function (index, product) {
                    $(product).css('animation-delay', index * 100 + 'ms');
                });

                // Modify the ordering form.
                $inputs.each(function () {
                    var $input = $(this),
                        name = $input.attr('name'),
                        value = $input.val();

                    if (name === 'orderby') {
                        return;
                    }

                    if ('min_price' === name && value == $input.data('min')) {
                        $order.find('input[name="min_price"]').remove();
                        return;
                    }

                    if ('max_price' === name && value == $input.data('max')) {
                        $order.find('input[name="max_price"]').remove();
                        return;
                    }

                    $order.find('input[name="' + name + '"]').remove();

                    if (value !== '' && value != 0) {
                        $('<input type="hidden" name="' + name + '">').val(value).appendTo($order);
                    }
                });

                $container.replaceWith($products);
                $products.find('li.product').addClass('animated razziFadeInUp');

                $(document.body).trigger('razzi_products_loaded', [$products.children(), false]); // appended = false
            }

            $form.removeClass('filtering');
            $(document.body).trigger('razzi_products_filter_request_success', [response, url, form]);
        });
    }

    $(function () {
        new RazziProductsFilterWidget();
    })
})(jQuery, _);