function directory(container, flag = true) {
    const section = $('.bk-section')
    section.find('h2').each(function (index, item) {
        const fristTitle = 'heading-' + (index + 1);
        const fristTitleItem = $('<li></li>');
        const a = $('<a></a>')
        const text = flag ? (index + 1) + '、' + $(item).text() : $(item).text();
        a.text(text)
        a.attr('href', 'javascript:void(0)')
        a.attr('data-id', fristTitle)
        fristTitleItem.append(a)
        $(container).append(fristTitleItem)
        $(item).attr('id', fristTitle)
        if (flag) {
            let subTitle = $('<ul></ul>')
            fristTitleItem.append(subTitle)
            $(item).parent().nextUntil('.bk-title').each(function (i, el) {
                if (el.nodeName !== 'H3') return
                const subTitleItem = $('<li></li>')
                const a = $('<a></a>')
                a.text($(el).text())
                a.attr('href', 'javascript:void(0)')
                a.attr('data-id', fristTitle + i)
                subTitleItem.append(a)
                subTitle.append(subTitleItem)
                $(el).attr('id', fristTitle + i)
            })
        }
    })
}

$(function () {
    directory('#bk-directory-pc', true)
    directory('#bk-directory-mobile', false)
    $('.bk-directory-list').find('a').on('click', function () {
        const id = '#' + $(this).attr('data-id');
        const scrollTop = innerWidth > 768 ? $(id).offset().top - $('header').height() : $(id).offset().top - $('header').height() - $('.bk-directory').height();
        $("html, body").animate({
            scrollTop: scrollTop
        }, {duration: 500, easing: "swing"});
        return false;
    })

    $('img.scapegoat').on('click', function () {
        const id = $(this).attr('data-ctrid')
        $("html, body").animate({
            scrollTop: $('#' + id).offset().top
        }, {duration: 500, easing: "swing"});
    })

    $('.bk-literature-list i').on('click', function(){
        const id = $(this).parent('li').attr('id')
        if(!id) return
        const selector = '[data-ctrid=' + id + ']'
        $("html, body").animate({
            scrollTop: $(selector).eq(0).offset().top - 150
        }, {duration: 500, easing: "swing"});
    })

    // 视频播放
    $('.bk-album .bk-play').on('click', function(){
        const videoUrl = $(this).siblings('video').attr('src');
        $('#video-popup video').attr('src', videoUrl);
        $('#video-popup').show();
    })
    $('#video-popup .close').on('click', function(){
        $(this).parents('#video-popup').hide();
    });
})