$(document).ready(function () {

    $(document).on('click', 'button.sub, button.add', function () {

        let input = $(this).parent().find('input.qty');
        let articul = $(this).parent().parent().parent().find('.name .articul').html();

        if ($(this).hasClass('sub') && input.val() > 1)
            input.val(parseInt(input.val()) - 1);

        else if ($(this).hasClass('add'))
            input.val(parseInt(input.val()) + 1);

        if (input.val() === '' || input.val() === '0' || input.val() < 0)
            input.addClass('warning');
        else if (input.hasClass('warning'))
             input.removeClass('warning');

        if (articul) {

            $.ajax({
                url: '/ajax/cart_update.php',
                type: 'post',
                data: {
                    action: 'addItem',
                    articul: articul,
                    quantity: input.val()
                },
                success: function (data) {
                    updateCart();
                }
            });
        }

    }).on('click', '.qty.del', function () {

        if (!confirm('Are you sure?'))
            return false;

        let parent = $(this).parent().parent().parent();
        let articul = parent.find('.name .articul').html();

        $.ajax({
            url: '/ajax/cart_update.php',
            type: 'post',
            data: {
                action: 'deleteItem',
                articul: articul
            },
            success: function (data) {

                parent.remove();
                updateCart();
            }
        });
        updateCart();

    }).on('submit', '#add_to_cart_form', function (event) {

        event.preventDefault();

        let input = $(this).parent().find('input.qty');

        if (input.val() === '' || input.val() === '0' || input.val() < 0) {

            input.addClass('warning');

        } else {

            $(this).find('button').attr('disabled', true);

            if (input.hasClass('warning'))
                input.removeClass('warning');

            $.ajax({
                url: '/ajax/cart_update.php',
                type: 'post',
                data: {
                    action: 'addItem',
                    articul: $('span.articul').html(),
                    quantity: input.val()
                },
                success: function (data) {

                    $('.add_to_cart_form .wrapper').html('' +
                        '<div class="row"><p>Item has been added to the shopping cart.</p></div>' +
                        '<div class="row"><button type="button" class="cart_close">Add more items</button> \n' +
                        '&nbsp; <form action="/cart" class="send_request_link"><button type="submit">Send request</button></form></div>'
                    );

                }
            });
            updateCart();
        }

    }).on('click', '.cart_close', function () {

        $.nmTop().close();
        updateCart();

    }).on('change, keyup', 'input.qty', function() {

        let input = $(this);
        if (input.val() === '' || input.val() === '0' || input.val() < 0)
            input.addClass('warning');
        else
            input.removeClass('warning');

    });

    function updateCart() {

        // console.log('console : shopping cart updated');

        $.ajax({
            url: '/ajax/cart_info.php',
            type: 'POST',
            success: function (data) {

                let s = '';
                if (data > 1)
                    s = 's';

                if (data === 'null' || data === '0')
                    $('.shopping_cart_info').html('No products in request');
                else
                    $('.shopping_cart_info').html('Products in request <a href="/cart">' + data + ' item' + s + '</a>');
            }
        });
    }

    updateCart();

});