/**
 * 商品列表页
 * @author: wsl<shuiling.wang@yoho.cn>
 * @date: 2016/5/17
 */

var $ = require('yoho-jquery'),
    Swiper = require('yoho-swiper'),
    ellipsis = require('yoho-mlellipsis'),
    lazyLoad = require('yoho-jquery-lazyload'),
    tip = require('../plugin/tip'),
    filter = require('../plugin/filter'),
    loading = require('../plugin/loading');

var $goodsContainer = $('#goods-container'),
    $goodsChildren = $goodsContainer.children(),
    $ngc = $($goodsChildren.get(0)),
    $pgc = $($goodsChildren.get(1)),
    $dgc = $($goodsChildren.get(2));

var winH = $(window).height(),
    noResult = '<p class="no-result">未找到相关搜索结果</p>';

// 默认筛选条件
var defaultOpt = require('./query-param');

var $listNav = $('#list-nav'),

    // 导航数据信息
    navInfo = {
        newest: {
            order: 1,
            reload: true,
            page: 0,
            end: false
        },
        price: {
            order: 1,
            reload: true,
            page: 0,
            end: false
        },
        discount: {
            order: 1,
            reload: true,
            page: 0,
            end: false
        }
    },
    $pre = $listNav.find('.active'), // 纪录进入筛选前的active项，初始为选中项
    searching;

require('./suspend-cart'); // 悬浮购物车
require('../common');

ellipsis.init();

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

if ($('.swiper-container .swiper-slide').length > 1) {
    new Swiper('.swiper-container', {
        lazyLoading: true,
        lazyLoadingInPrevNext: true,
        loop: true,
        autoplay: 3000,
        autoplayDisableOnInteraction: true,
        paginationClickable: true,
        pagination: '.banner-top .pagination-inner'
    });
}

/**
 * 筛选注册的回调，筛选子项点击后逻辑
 * 需要执行search的场景：1.点选筛选项；2.relaod为true时切换导航；3.下拉加载
 * @param opt {type, id}
 */
function search(opt) {
    var setting = {},
        ext,
        att,
        nav, navType,
        page;

    if (searching) {
        return;
    }

    if (opt) {

        // 筛选项变更则重置reload为true
        for (att in navInfo) {
            if (navInfo.hasOwnProperty(att)) {
                navInfo[att].reload = true;
            }
        }

        // 处理active状态
        $listNav.children('.active').removeClass('active');
        $pre.addClass('active');

        switch (opt.type) {
            case 'gender':
                ext = {
                    gender: opt.id
                };
                break;
            case 'brand':
                ext = {
                    brand: opt.id
                };
                break;
            case 'sort':
                ext = {
                    sort: opt.id
                };
                break;
            case 'color':
                ext = {
                    color: opt.id
                };
                break;
            case 'size':
                ext = {
                    size: opt.id
                };
                break;
            case 'price':
                ext = {
                    price: opt.id
                };
                break;
            case 'discount':
                ext = {
                    discount: opt.id
                };
                break;
            default:
                break;
        }

        $.extend(defaultOpt, ext); // 扩展筛选项
    }


    // 导航类别
    if ($pre.hasClass('new')) {
        navType = 'newest';
    } else if ($pre.hasClass('price')) {
        navType = 'price';
    } else if ($pre.hasClass('discount')) {
        navType = 'discount';
    }

    nav = navInfo[navType];
    page = nav.page + 1;
    if (nav.reload) {
        page = 1;
    } else if (nav.end) {

        // 不需要重新加载并且数据请求结束
        return;
    }

    $.extend(setting, defaultOpt, {
        type: navType,
        order: nav.order,
        page: page
    });

    searching = true;
    loading.showLoadingMask();

    $.ajax({
        type: 'GET',
        url: '/product/sale/search',
        data: setting,
        success: function(data) {
            var $container,
                num;

            console.log(data);

            switch (navType) {
                case 'newest':
                    $container = $ngc;
                    break;
                case 'price':
                    $container = $pgc;
                    break;
                case 'discount':
                    $container = $dgc;
                    break;
                default:
                    break;
            }

            if (data === ' ') {
                nav.end = true;

                if (nav.reload) {
                    $container.html(noResult);
                }
            } else {
                if (nav.reload) {
                    $container.html(data);
                    lazyLoad($container.find('.lazy'));
                } else {
                    num = $container.find('.good-info').length;
                    $container.append(data);

                    // lazy good-infos who append in
                    lazyLoad($container.find('.good-info:gt(' + (num - 1) + ') .lazy'));
                }
            }

            nav.reload = false;
            nav.page = page;

            searching = false;
            loading.hideLoadingMask();

            window.rePosFooter();

            $('.good-detail-text .name').each(function() {
                var $this = $(this),
                    $title = $this.find('a');

                $title[0].mlellipsis(2);
            });
        },
        error: function() {
            tip.show('网络断开连接了~');
            searching = false;
            loading.hideLoadingMask();
        }
    });

}

$.ajax({
    type: 'GET',
    url: '/product/newsale/filter',
    data: defaultOpt,
    success: function(data) {
        $goodsContainer.append(data);

        // 初始化filter&注册filter回调
        filter.initFilter({
            fCbFn: search,
            hCbFn: function() {

                // 切换active状态到$pre上
                $pre.addClass('active');
                $pre.siblings('.filter').removeClass('active');
            },
            missStatus: true
        });
    }
});
lazyLoad($('.lazy'));

// 导航栏点击逻辑说明：
// 1.点击非active项时切换active状态
// 2.价格和折扣active状态时继续点击切换排序
// 3.筛选无active时点击展开筛选面板
// 4.筛选有active时点击隐藏筛选面板并恢复点击筛选前active项的active状态
// 5.当前active为筛选并且点击其他项时，隐藏筛选面板
$listNav.bind('contextmenu', function() {
    return false;
});

$listNav.on('touchend touchcancel', function(e) {
    var $this = $(e.target).closest('li'),
        nav,
        navType,
        $active;

    e.preventDefault();

    if (typeof $this === 'undefined' || $this.length === 0) {
        return;
    }

    if ($this.hasClass('filter')) {

        // 筛选面板切换状态
        if ($this.hasClass('active')) {
            filter.hideFilter();

            // 点击筛选钱的active项回复active
            $pre.addClass('active');
            $this.removeClass('active');
        } else {
            $pre = $this.siblings('.active');

            $pre.removeClass('active');
            $this.addClass('active');

            filter.showFilter();
        }
    } else {

        if ($this.hasClass('new')) {
            navType = 'newest';
        } else if ($this.hasClass('price')) {
            navType = 'price';
        } else if ($this.hasClass('discount')) {
            navType = 'discount';
        }

        nav = navInfo[navType];

        if ($this.hasClass('active')) {

            // 最新无排序切换
            if ($this.hasClass('new')) {
                return;
            }

            if ($this.hasClass('price') || $this.hasClass('discount')) {

                // 价格/折扣切换排序状态
                $this.find('.icon > .iconfont').toggleClass('cur');
                $pre = $this; // 更新pre为当前项
                nav.reload = true; // 重置reload,HTML会被替换为逆序的HTML
                nav.order = nav.order === 0 ? 1 : 0; // 切换排序
            }
        } else {
            $active = $this.siblings('.active');

            $pre = $this; // $pre为除筛选导航的其他导航项，若当前active的为筛选，则把$pre置为当前点击项

            if ($active.hasClass('filter')) {

                // 若之前active项为筛选，则隐藏筛选面板
                filter.hideFilter();
            } else {

                // 切换container显示
                $goodsContainer.children('.container:not(.hide)').addClass('hide');

                switch (navType) {
                    case 'newest':
                        $ngc.removeClass('hide');
                        break;

                    case 'price':
                        $pgc.removeClass('hide');
                        break;

                    case 'discount':
                        $dgc.removeClass('hide');
                        break;
                    default:
                        break;
                }
            }

            $active.removeClass('active');
            $this.addClass('active');
        }

        if (nav.reload) {
            search();
        }
    }
    e.stopPropagation();
});

function scrollHandler() {

    // 当scroll到1/4$goodsContainer高度后继续请求下一页数据
    if ($(window).scrollTop() + winH >
        $(document).height() - 0.25 * $goodsContainer.height() - 50) {
        if (typeof($pre) !== 'undefined') {
            search();
        }
    }
}

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

// 初始请求最新第一页数据
search();

$listNav.on('touchstart', 'li', function() {
    $(this).addClass('bytouch');
}).on('touchend touchcancel', function() {
    $listNav.find('li').removeClass('bytouch');
});