/**
 *  品牌一览
 * @author: liangzhifeng<zhifeng.liang@yoho.cn>
 * @date: 2015/10/23
 */

var $ = require('jquery'),
    Hammer = require('yoho.hammer'),
    Swiper = require('yoho.iswiper'),
    lazyLoad = require('yoho.lazyload');

var swiper,
    $fixTitleBar,
    $brandList = $('.brand-list'),
    $icon = $('.search-icon'),
    $genderItem = $('.genderNav li'),
    hotBrandsSwiper;

var searchH = $('.newbrand-search').outerHeight(),
    headerH = $('.yoho-header').outerHeight(),
    brandSwipe = parseInt(searchH) + parseInt(headerH) - 1,
    minBrandListTop;

var brandsData,
    $keyword,
    clearTextHammer;

//热门品牌滑动
hotBrandsSwiper = new Swiper('.brands-swiper', {
    grabCursor: true,
    slidesPerView: 'auto',
    wrapperClass: 'brands-list',
    slideElement: 'li'
});

swiper = new Swiper('.swiper-container', {
    lazyLoading: true,
    loop: true,
    autoplay: 3000,
    pagination: '.swiper-pagination .pagination-inner'
});

lazyLoad($('img.lazy'));
$('.yoho-header').css({
    'z-index': 2,
    position: 'fixed',
    top: 0
});

if ($('.banner-top').length > 0) {
    $('.hot-brands').css('padding-top', '0');
}

$fixTitleBar = $('<div class="title-bar fixed-title-bar"><h2></h2></div>');
$fixTitleBar.css({
    position: 'fixed',
    top: brandSwipe
}).hide();
minBrandListTop = brandSwipe + $('.hot-brands').outerHeight() + $('.banner-top').outerHeight();
$brandList.last().append($fixTitleBar);

function scrollHandler() {
    var scrTop = $(window).scrollTop();

    if ($brandList.eq(0).offset().top < minBrandListTop) {
        $fixTitleBar.hide();
    }

    $brandList.each(function() {
        var offTop = $(this).offset().top - brandSwipe;

        if (scrTop >= offTop) {
            $fixTitleBar.css({
                display: 'block'
            }).find('h2').html($(this).find('.title-bar').text());
        }

    });
}

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


function changeBackground() {
    var $brandList = $('.brand-list').find('p');

    $brandList.on('touchstart', function() {
        $brandList.css('background', '#fff');
        $(this).css('background', '#eee');
    }).on('touchend touchcancel', function() {
        $(this).css('background', '#fff');
    });
}
changeBackground();

function searchResult() {
    var keyword = ($keyword.val() + '').toLowerCase();
    var result = {},
        i = 0,
        html = '';

    if (keyword !== '') {

        // 遍历首字母搜索
        $.each(brandsData, function(k, v) {
            if ($.isArray(v)) {

                // 遍历品牌，进行匹配
                $.each(v, function(i, brand) {
                    if (brand.name.toLowerCase().indexOf(keyword) > -1) {
                        result[k] = result[k] || [];
                        result[k].push(brand);
                    }
                });
            }
        });

        // 根据搜索结果生成 HTML
        $.each(result, function(k, v) {
            var brandHtml = ['<div class="brand-list bar-', i, '">'];

            i++;
            brandHtml.push('<div class="title-bar"><h2>');
            brandHtml.push(k);
            brandHtml.push('</h2></div>');
            $.each(v, function(i, brand) {

                brandHtml.push('<p><a href="' + brand.url + '">' + brand.name);
                if (brand.isNew) {
                    brandHtml.push('<i class="icon-new">NEW</i>');
                }
                if (brand.isHot) {
                    brandHtml.push('<i class="icon-hot">HOT</i>');
                }
                brandHtml.push('</a></p>');
            });
            brandHtml.push('</div>');
            html += brandHtml.join('');

        });
    }

    // 插入 dom，绑定事件
    $('.search-result').html(html);
    changeBackground();
}

if ($('.brand-search-page').length) {
    brandsData = $.parseJSON($('#brands-data').html());
    $keyword = $('#keyword');

    $keyword.on('input', function() {
        if ($keyword.val().length) {
            $icon.css('color', '#000');
            $(this).closest('.search-box').css('width', '11.25rem');
            $('.search-action').show();
        } else {
            $icon.css('color', '#b2b2b2');
            $(this).closest('.search-box').css('width', '12.5rem');
            $('.search-action').hide();
        }
        searchResult();
    }).focus();

    clearTextHammer = new Hammer($('.clear-text')[0]);
    clearTextHammer.on('tap', function(e) {
        e.preventDefault();
        $('.search-result').html('');
        $('#keyword').val('').trigger('input');
        e.srcEvent.stopPropagation();
    });

    $('form.search-box').on('submit', function() {
        return false;
    });

}

if ($genderItem.length > 0) {
    $genderItem.on('touchstart', function() {
        $('.genderNav ul .active').removeClass('active');
        $(this).addClass('active');
        window.location.search = 'channel=' + ($(this).data('id') + 1);
    });
}