var body = $("body")
var button = $("<li id='set'></li>")
button.html("<span id='start'>开启自动播放模式</span>")
var json = {
    "background": "#36f",
    "height": "16px",
    "padding": "5px",
    "z-index": 999, // Stay top
    "cursor": "pointer",
    "bottom": "0",
    "left": "0",
    "color": "#fff",
    "position": "fixed"
};
button.css(json);
body.append(button)

// Index of current video
var index = 0;
$(".posCatalog_select").each((i, item) => {
    if ($(item).hasClass("posCatalog_active")) {
        index = i;
        return false;
    }
});

console.log("第" + (index + 1) + "个视频开始播放");

// Blacklist of course id, courses in this list will be skipped
var blacklist = [];

function autoNext() {
    index++;
    var selectID = $(".posCatalog_select")[index].id;
    while (selectID.indexOf('cur') == -1 || blacklist.indexOf(selectID) != -1)
        inedx++;
    console.log("第" + (index + 1) + "个视频开始播放");
    var next = document.querySelectorAll(".posCatalog_select")[index].querySelector(".posCatalog_name");
    next.click();
}

var progressRecord = -1;

button.click(function () {

    setInterval(function () {
        // Get iframe
        var video = $("iframe").contents().find("iframe").contents();
        // Get video progress 0~100 float
        var spans = video.find("#video > div.vjs-control-bar > div.vjs-progress-control.vjs-control > div").attr("aria-valuenow");
        var play = function () {
            if (spans == progressRecord) {
                video.find("#video > button").click();
                console.log("视频被暂停，已继续");
            }
            progressRecord = spans;
            var slience = video.find("#video > div.vjs-control-bar > div.vjs-volume-panel.vjs-control.vjs-volume-panel-vertical > button");
            // Mute
            if (slience.attr("title") != "取消静音") {
                slience.click();
            }
        }
        var load = video.find("#loading");
        if (load.css("visibility") != "hidden") {
            return false;
        }
        if (spans != 100) {
            play();
        }
        else {
            console.log("第" + (index + 1) + "个视频播放完成");
            autoNext();
        }
        $("#start").html("自动模式已开启,本视频进度:" + spans + "%");
    }, 2000);
});