$(function () {
    /**
     * 添加文章卡片hover效果.
     */
    let articleCardHover = function () {
        let animateClass = 'animated pulse';
        $('article .article').hover(function () {
            $(this).addClass(animateClass);
        }, function () {
            $(this).removeClass(animateClass);
        });
    };
    articleCardHover();

    /*菜单切换*/
    $('.sidenav').sidenav();

    /* 修复文章卡片 div 的宽度. */
    let fixPostCardWidth = function (srcId, targetId) {
        let srcDiv = $('#' + srcId);
        if (srcDiv.length === 0) {
            return;
        }

        let w = srcDiv.width();
        if (w >= 450) {
            w = w + 21;
        } else if (w >= 350 && w < 450) {
            w = w + 18;
        } else if (w >= 300 && w < 350) {
            w = w + 16;
        } else {
            w = w + 14;
        }
        $('#' + targetId).width(w);
    };

    /**
     * 修复footer部分的位置，使得在内容比较少时，footer也会在底部.
     */
    let fixFooterPosition = function () {
        $('.content').css('min-height', window.innerHeight - 165);
    };

    /**
     * 修复样式.
     */
    let fixStyles = function () {
        fixPostCardWidth('navContainer', 'articles');
        fixPostCardWidth('artDetail', 'prenext-posts');
        fixFooterPosition();
    };
    fixStyles();

    /*调整屏幕宽度时重新设置文章列的宽度，修复小间距问题*/
    $(window).resize(function () {
        fixStyles();
    });

    /*初始化瀑布流布局*/
    $('#articles').masonry({
        itemSelector: '.article'
    });

    AOS.init({
        easing: 'ease-in-out-sine',
        duration: 700,
        delay: 100
    });

    /*文章内容详情的一些初始化特性*/
    let articleInit = function () {
        $('#articleContent a').attr('target', '_blank');

        $('#articleContent img').each(function () {
            let imgPath = $(this).attr('src');
            $(this).wrap('<div class="img-item" data-src="' + imgPath + '" data-sub-html=".caption"></div>');
            // 图片添加阴影
            $(this).addClass("img-shadow img-margin");
            // 图片添加字幕
            let alt = $(this).attr('alt');
            let title = $(this).attr('title');
            let captionText = "";
            // 如果alt为空，title来替
            if (alt === undefined || alt === "") {
                if (title !== undefined && title !== "") {
                    captionText = title;
                }
            } else {
                captionText = alt;
            }
            // 字幕不空，添加之
            if (captionText !== "") {
                let captionDiv = document.createElement('div');
                captionDiv.className = 'caption';
                let captionEle = document.createElement('b');
                captionEle.className = 'center-caption';
                captionEle.innerText = captionText;
                captionDiv.appendChild(captionEle);
                this.insertAdjacentElement('afterend', captionDiv)
            }
        });
        $('#articleContent, #myGallery').lightGallery({
            selector: '.img-item',
            // 启用字幕
            subHtmlSelectorRelative: true
        });

        // progress bar init
        const progressElement = window.document.querySelector('.progress-bar');
        if (progressElement) {
            new ScrollProgress((x, y) => {
                progressElement.style.width = y * 100 + '%';
            });
        }
    };
    articleInit();

    $('.modal').modal();

    /*回到顶部*/
    $('#backTop').click(function () {
        $('body,html').animate({scrollTop: 0}, 400);
        return false;
    });

    /*监听滚动条位置*/
    let $nav = $('#headNav');
    let $backTop = $('.top-scroll');
    $(window).scroll(function () {
        /* 回到顶部按钮根据滚动条的位置的显示和隐藏.*/
        let scroll = $(window).scrollTop();
        if (scroll < 100) {
            $nav.addClass('nav-transparent');
            $backTop.slideUp(300);
        } else {
            $nav.removeClass('nav-transparent');
            $backTop.slideDown(300);
        }
    });
});
