/**
 *  商品详情
 * @author: liangzhifeng<zhifeng.liang@yoho.cn>
 * @date: 2015/11/18
 */
var $ = require('jquery'),
    lazyLoad = require('yoho.lazyload');

var loading = require('../../plugin/loading'),
    tip = require('../../plugin/tip');

var introUrl = $('#introUrl').val(),
    winH = $(window).height(),
    $productDesc,
    searching = false,
    end = false;

function search() {
    if (searching || end) {
        return;
    }
    searching = true;

    loading.showLoadingMask();

    $.ajax({
        type: 'GET',
        url: introUrl,
        success: function(data) {
            $productDesc = $('#productDesc');
            $productDesc.append(data);

            lazyLoad($productDesc.find('img.lazy'));

            searching = false;
            end = true;
            loading.hideLoadingMask();
        },
        error: function() {
            tip.show('网络断开连接了~');
            searching = false;
            loading.hideLoadingMask();
        }
    });
}

function scrollHandler() {
    if (!end || $(window).scrollTop() + winH >= $(document).height() - 50) {
        search();
    }
}

//srcoll to load more
$(window).scroll(function() {
    window.requestAnimationFrame(scrollHandler);
});