const videoRender = (element: HTMLElement, url: string) => {
    element.insertAdjacentHTML("afterend", `<video controls="controls" src="${url}"></video>`);
    element.remove();
};

const audioRender = (element: HTMLElement, url: string) => {
    element.insertAdjacentHTML("afterend", `<audio controls="controls" src="${url}"></audio>`);
    element.remove();
};

const iframeRender = (element: HTMLElement, url: string) => {
    const youtubeMatch = url.match(/\/\/(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v=|watch\?.+&v=))([\w|-]{11})(?:(?:[\?&]t=)(\S+))?/);
    const youkuMatch = url.match(/\/\/v\.youku\.com\/v_show\/id_(\w+)=*\.html/);
    const qqMatch = url.match(/\/\/v\.qq\.com\/x\/cover\/.*\/([^\/]+)\.html\??.*/);
    const coubMatch = url.match(/(?:www\.|\/\/)coub\.com\/view\/(\w+)/);
    const facebookMatch = url.match(/(?:www\.|\/\/)facebook\.com\/([^\/]+)\/videos\/([0-9]+)/);
    const dailymotionMatch = url.match(/.+dailymotion.com\/(video|hub)\/(\w+)\?/);
    const bilibiliMatch = url.match(/(?:www\.|\/\/)bilibili\.com\/video\/(\w+)/);
    const tedMatch = url.match(/(?:www\.|\/\/)ted\.com\/talks\/(\w+)/);

    if (youtubeMatch && youtubeMatch[1].length === 11) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video" src="//www.youtube.com/embed/${youtubeMatch[1] +
            (youtubeMatch[2] ? "?start=" + youtubeMatch[2] : "")}"></iframe>`);
        element.remove();
    } else if (youkuMatch && youkuMatch[1]) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video" src="//player.youku.com/embed/${youkuMatch[1]}"></iframe>`);
        element.remove();
    } else if (qqMatch && qqMatch[1]) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video" src="https://v.qq.com/txp/iframe/player.html?vid=${qqMatch[1]}"></iframe>`);
        element.remove();
    } else if (coubMatch && coubMatch[1]) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video"
 src="//coub.com/embed/${coubMatch[1]}?muted=false&autostart=false&originalSize=true&startWithHD=true"></iframe>`);
        element.remove();
    } else if (facebookMatch && facebookMatch[0]) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video"
 src="https://www.facebook.com/plugins/video.php?href=${encodeURIComponent(facebookMatch[0])}"></iframe>`);
        element.remove();
    } else if (dailymotionMatch && dailymotionMatch[2]) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video"
 src="https://www.dailymotion.com/embed/video/${dailymotionMatch[2]}"></iframe>`);
        element.remove();
    } else if (bilibiliMatch && bilibiliMatch[1]) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video"
 src="//player.bilibili.com/player.html?bvid=${bilibiliMatch[1]}"></iframe>`);
        element.remove();
    } else if (tedMatch && tedMatch[1]) {
        element.insertAdjacentHTML("afterend",
            `<iframe class="iframe__video" src="//embed.ted.com/talks/${tedMatch[1]}"></iframe>`);
        element.remove();
    }
};

export const mediaRender = (element: HTMLElement) => {
    if (!element) {
        return;
    }
    element.querySelectorAll("a").forEach((aElement) => {
        const url = aElement.getAttribute("href");
        if (!url) {
            return;
        }
        if (url.match(/^.+.(mp4|m4v|ogg|ogv|webm)$/)) {
            videoRender(aElement, url);
        } else if (url.match(/^.+.(mp3|wav|flac)$/)) {
            audioRender(aElement, url);
        } else {
            iframeRender(aElement, url);
        }
    });
};