/**

 * 删除购物车

 * @param cart_id

 */

function drop_cart_item(cart_id){

    var parent_tr = $('#cart_item_' + cart_id).parent();

    var url = HOMESITEURL+'/Cart/del.html';

    layer.confirm('Are you sure to delete it?', {

        btn: ['Yes', 'No'],

        title: false,

    }, function (cart_confirm) {

        $.get(url,{'cart_id': cart_id}, function(result){

            if(result.state){

                //删除成功

                if(result.quantity == 0){//判断购物车是否为空

                    window.location.reload();    //刷新

                } else {

                	$('tr[ds_group="'+cart_id+'"]').remove();//移除本商品或本套装

            		if (parent_tr.children('tr').length == 2) {//只剩下店铺名头和店铺合计尾，则全部移除

            		    parent_tr.remove();

            		}

            		calc_cart_price();

                }

            }else{

            	alert(result.msg);

            }

        },'json');

        layer.close(cart_confirm);
        window.location.reload();    //刷新

    });

}



/**

 * 更改购物车数量

 * @param cart_id

 * @param input

 */
 


function change_quantity(cart_id, input){

    var subtotal = $('#item' + cart_id + '_subtotal');

    //暂存为局部变量，否则如果用户输入过快有可能造成前后值不一致的问题

    var _value = input.value;

    var url = HOMESITEURL+'/Cart/update.html';

    $.get(url,{'cart_id': cart_id,'quantity': _value}, function(result){

    	$(input).attr('changed', _value);

    	if(result.state == 'true'){

            $('#item' + cart_id + '_price').html(number_format(result.goods_price,2));

            subtotal.html(number_format(result.subtotal,2));

            $('#cart_id'+cart_id).val(cart_id+'|'+_value);

        }



        if(result.state == 'invalid'){

          subtotal.html(0.00);

          $('#cart_id'+cart_id).remove();

          $('tr[ds_group="'+cart_id+'"]').addClass('item_disabled');

          $(input).parent().next().html('');

          $(input).parent().removeClass('ws0').html('已下架');

          layer.msg(result.msg);

          return;

        }



        if(result.state == 'shortage'){

          $('#item' + cart_id + '_price').html(number_format(result.goods_price,2));

          $('#cart_id'+cart_id).val(cart_id+'|'+result.goods_num);

          $(input).val(result.goods_num);

            layer.msg(result.msg);

          return;

        }



        if(result.state == '') {

            //更新失败

            layer.msg(result.msg);

            $(input).val($(input).attr('changed'));

        }

        calc_cart_price();

    }, 'json');

}



/**

 * 购物车减少商品数量

 * @param cart_id

 */

function decrease_quantity(cart_id){

    var item = $('#input_item_' + cart_id);

    var orig = Number(item.val());

    if(orig > 1){

        item.val(orig - 1);

        item.keyup();

    }

}



/**

 * 购物车增加商品数量

 * @param cart_id

 */

function add_quantity(cart_id){

    var item = $('#input_item_' + cart_id);

    var orig = Number(item.val());

    item.val(orig + 1);

    item.keyup();

}



/**

 * 购物车商品统计

 */

function calc_cart_price() {

    //每个店铺商品价格小计

    obj = $('table[ds_type="table_cart"]');

    if(obj.children('tbody').length==0) return;

    //购物车已选择商品的总价格

    var allTotal = 0;

    obj.children('tbody').each(function(){

        //购物车每个店铺已选择商品的总价格

        var eachTotal = 0;

        $(this).find('em[ds_type="eachGoodsTotal"]').each(function(){

            if ($(this).parent().parent().find('input[type="checkbox"]').eq(0).prop('checked') != true)

            {

                return;

            }

            eachTotal = eachTotal + parseFloat($(this).html());  

        });

        allTotal += eachTotal;

        $(this).children('tr').last().find('em[ds_type="eachStoreTotal"]').eq(0).html(number_format(eachTotal,2));

    });

    $('#cartTotal').html(number_format(allTotal,2));

}

$(function(){

    calc_cart_price();

    $('#selectAll').on('click',function(){

        if ($(this).prop('checked')) {

            $('input[type="checkbox"]').prop('checked',true);

            $('input[type="checkbox"]:disabled').prop('checked',false);

        } else {

            $('input[type="checkbox"]').prop('checked',false);

        }

        calc_cart_price();

    });

    $('input[ds_type="eachGoodsCheckBox"]').on('click',function(){

        if (!$(this).prop('checked')) {

            $('#selectAll').prop('checked',false);

        }

        calc_cart_price();

    });

    $('#next_submit').on('click',function(){
        if ($(document).find('input[ds_type="eachGoodsCheckBox"]:checked').size() == 0) {
            layer.msg('请选中要结算的商品');
            return false;
        }else {

            $('#form_buy').submit();
        }
    });

});