// ==UserScript==
// @name         21tb自用
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  自己用的，不要下载……
// @author       You
// @match        https://sxqc-gbpy.21tb.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=21tb.com
// @grant        none
// @license MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    var interval=30 //间隔时间，秒，必须正整数
    var courseList=[] //所有课程
    var nowIndex=0 //当前播放视频的序号
    var isStart=false
    var watchVideo //视频任务
    console.log("已启动")

    //document.querySelector('#goNextStep').click()
    //document.querySelector('.next-button').click()
    var domain=document.domain
    var url=window.location.pathname
    //时间设置有误，默认为30秒
    if(!(Number.isInteger(interval)&&interval>0))
    {
        interval=30
    }
    if(domain=='sxqc-gbpy.21tb.com' && url=='/els/html/courseStudyItem/courseStudyItem.learn.do')
    {
        setTimeout(function(){
            var newLi = document.createElement("li"); //创建一个input对象（提示框按钮）
            newLi.id = "id001";
            newLi.classList.add('cs-menu-item','cl-go-btn','pull-right')
            var newA=document.createElement("a")
            newA.classList.add('cl-go-link')
            newA.innerHTML='开始挂机'
            newA.style.color='blue'
            newLi.appendChild(newA)
            document.querySelector('.cs-nav-menu').appendChild(newLi)
            newA.onclick=function(){
                if(isStart==false)
                {
                    if(document.querySelector('#courseItemId'))
                    {startWatch()}
                    else
                    {startWatch2()}
                    isStart=true
                    newA.innerHTML='正在挂机'
                    newA.style.color='red'
                }else{
                    clearInterval(watchVideo)
                    isStart=false
                    newA.innerHTML='开始挂机'
                    newA.style.color='blue'
                }
            }
        },10000);
    }


    function startWatch2()
    {
      courseList= document.getElementsByClassName("url-course-content")[0].contentWindow.document.querySelectorAll('.section-item:not(.finish)')
      console.log("还有有"+ courseList.length +"节课")
        checkVideo2()
        watchVideo=setInterval(checkVideo2,interval*1000)
    }

function checkVideo2()
    {

        //判断是否有下一页出现
        if(document.querySelector('.next-button'))
        {
            courseList=document.querySelectorAll('.section-item:not(.finish)')
            if(courseList?.length==0)
            {
            clearInterval(watchVideo)
            }else{
            document.querySelectorAll('.next-button')[document.querySelectorAll('.section-item:not(.finish)').length].click()
            }
        }
        if(document.getElementsByClassName("url-course-content")[0].contentWindow.document.querySelector('video').paused)
        {
            document.getElementsByClassName("url-course-content")[0].contentWindow.document.querySelector('video').play()
        }

    }





    function startWatch()
    {
        console.log("已加载")
        courseList=document.querySelector('#courseItemId').querySelectorAll('.cl-catalog-item-sub')
        console.log("共有"+ courseList.length +"节课")

        checkVideo()

         console.log("开启定时器")
        //开启定时器，循环检测
       watchVideo=setInterval(checkVideo,interval*1000)
    }

        function checkVideo(){
            var j=0;
            for(j=0;j<courseList.length;j++)
            {
                console.log("进入循环")
                if(document.querySelectorAll('.cl-catalog-item-sub')[j].querySelector('a').classList.contains('cl-catalog-link-done'))
                {
                       continue;
                }
                //如果有正在播放的视频

               else if(document.querySelectorAll('.cl-catalog-item-sub')[j].querySelector('a').classList.contains('cl-catalog-playing'))
                {
                    console.log("aaaaaaaaaaa","playing",j)
                    //视频暂停
                    if(j!=nowIndex)
                    {nowIndex=j}                    
                    if(document.getElementById('iframe_aliplayer').contentWindow.document.querySelector('video').paused)
                    {

                     document.getElementById('iframe_aliplayer').contentWindow.document.querySelector('video').play()
                    }
                    break;
                }

                //找到未播放完成视频
               else
                {
                    console.log("找到"+(j+1)+"节课未播放完成")
                    console.log("当前课程"+nowIndex)
                    if(j!=nowIndex)
                    {
                        nowIndex=j
                        //点击
                        document.querySelectorAll('.cl-catalog-item-sub')[j].querySelector("a").click();
                        break;
                    }
                }
            }
            console.log("正在播放第"+nowIndex+"节课")

            if(j>courseList.length)
            {
                clearInterval(watchVideo)
            }

        }

    // Your code here...
})();