// ==UserScript==
// @name         京东秒杀价格过滤
// @version      0.2.1
// @icon         https://www.jd.com/favicon.ico
// @description  按价格过滤并排序（价格升序）秒杀商品列表
// @author       You!
// @grant        GM_setValue
// @grant        GM_getValue
// @match        *://miaosha.jd.com/category.html?cate_id=*
// @run-at       document-end
// @namespace    http://tampermonkey.net/
// @downloadURL none
// ==/UserScript==

(function() {
    var uiInit = function(){
        clearInterval(priceUI);
        var uiPos = $('#sk_mod_er');
        if (uiPos.length > 0) {
            uiPos.append($(
                '<div class="sk_mod_er_mobile" style="color:white;padding:7px;float:left;text-align:left">'+
                '<nobr>过滤价格：<a id="fltReload" href style="color:white;font-weight:700" title="将会重新加载页面">刷新</a></nobr><br>'+
                '<input id="fltPriceMin" type="number" style="width:80px;margin-top:3px" value="'+GM_getValue('jd_miaosha_price_min')+'"/><br/>'+
                '<input id="fltPriceMax" type="number" style="width:80px;margin-top:5px" value="'+GM_getValue('jd_miaosha_price_max')+'"/><br/>'+
                '</div>'
            ));

            $('#fltReload').first().click(function(){
                priceMin = getFloat($('#fltPriceMin').first().val());
                priceMax = getFloat($('#fltPriceMax').first().val());
                setTimeout(function() {
                    GM_setValue("jd_miaosha_price_min", priceMin);
                    GM_setValue("jd_miaosha_price_max", priceMax);
                }, 0);
            });
        } else priceUI = setInterval(uiInit, 1000);
    };

    var doFilter = function(){
        clearInterval(priceFilter);
        var count = 0;
        //count += filterGoods($('div.skwrap')); //正在抢购
        //count += filterGoods($('div.moregoods')); //更多好货

        count += filterGoods($('div.catinfo_seckillnow')); //当天正在秒杀的商品
        count += filterGoods($('div.catinfo_startsoon')); //明日秒杀的商品
        if (count === 0) priceFilter = setInterval(doFilter, 1000);
    };
    var filterGoods = function(goodsList) {
        var goods = goodsList.find('li.seckill_mod_goods');
        if (goods.length > 0) {
            var niceGoods = [];
            goods.each(function(idx){
                //按商品名过滤
                if ('undefined' !== typeof(filterPName) && filterPName !== null) {
                    var pname = getProductName(this);
                    if (!filterPName(pname)) return;
                }
                //按价格过滤
                var price = getPrice(this);
                if (price < priceMin || priceMax < price) return;
                //命中
                niceGoods.push(this);
            });
            //排序
            if (niceGoods.length > 0) {
                niceGoods.sort(function(g1, g2){
                    return getPrice(g1) - getPrice(g2); //<-------------------------------------------------如果要降序，修改这里
                });
                //取消延迟加载
                var lazyImgs = $(niceGoods).find('img[data-lazy-img!="done"]');
                if (lazyImgs.length > 0) lazyImgs.each(function(idx){
                    var img = $(this);
                    this.src = img.attr('data-lazy-img');
                    img.attr('data-lazy-img', 'done');
                });
            } else niceGoods = $('<center><h2><br/>该分类下所有商品的价格都不符合过滤条件。<br/></h2></center');
            //替换原内容
            $(goods[0].closest('ul')).empty().append(niceGoods);
        }
        return goods.length;
    };

    if (!location.href.match('miaosha.jd.com')) return;

    var priceMin = GM_getValue('jd_miaosha_price_min');
    var priceMax = GM_getValue('jd_miaosha_price_max');

    var priceUI = setInterval(uiInit, 1000);
    var priceFilter = setInterval(doFilter, 1000);
})();

function getProductName(elm) {
    return $(elm).find('.seckill_mod_goods_title').first().text().trim();
}

function getPrice(elm) {
    return getFloat($(elm).find('i.seckill_mod_goods_price_now').first().text());
}

function getFloat(str) {
    str = str.replace('￥','').replace('¥','').trim();
    if (!/^\d+\.?\d*$/.test(str)) return 0;
    return parseFloat(str);
}