// ==UserScript==
// @name         青书学堂自动刷课-230329更改版
// @namespace    http://tampermonkey.net/
// @version      0.6
// @description  青书学堂自动后台静音播放 刷课B站两不误@原作者zhuzhengliang Arslan，他没更新了，我改了下。致敬原作者
// @author       Hosea
// @match        *://*.qingshuxuetang.com/*

// @downloadURL https://update.greasyfork.icu/scripts/462833/%E9%9D%92%E4%B9%A6%E5%AD%A6%E5%A0%82%E8%87%AA%E5%8A%A8%E5%88%B7%E8%AF%BE-230329%E6%9B%B4%E6%94%B9%E7%89%88.user.js
// @updateURL https://update.greasyfork.icu/scripts/462833/%E9%9D%92%E4%B9%A6%E5%AD%A6%E5%A0%82%E8%87%AA%E5%8A%A8%E5%88%B7%E8%AF%BE-230329%E6%9B%B4%E6%94%B9%E7%89%88.meta.js
// ==/UserScript==

(function() {
    'use strict';
    var i
    var href = location.href
    console.log('href:', href);
    // 通过nodeId判断是否在读取页面
    if (href.indexOf('nodeId') > -1) {
        // 有视频组件的时候判定为正常
        setTimeout(function() {
            var video = parent.document.getElementsByTagName("video")[0]
            var params = new UrlSearch()
            // 课程ID
            var courseId = params.courseId
            const courseArr = params.nodeId.split('_')
            // 下一个播放的视频的key
            var nextKey = ''

            // 章节中课程播放完以后会跳转到错误的kcjs，以video为依据判断是否应该进入下一章节
            if (!video) {
                console.log('找不到视频组，尝试跳转到下一个章节')
                if (courseArr.length == 2) {
                    nextKey = `kcjs_${Number(courseArr[1]) + 1}`
                } else if (courseArr.length == 3) {
                    // 将章节ID自增1 课程ID设为1
                    nextKey = `kcjs_${Number(courseArr[1]) + 1}_${Number(1)}`
                }else{
                    nextKey = `${Number(courseArr[0]) + 1}`
                }
                const nextUrl =
                    `https://${window.location.host}${window.location.pathname}?teachPlanId=${params.teachPlanId}&periodId=${params.periodId}&courseId=${courseId}&nodeId=${nextKey}&category=${params.category}`
                console.log(params, 'currentId:', params.nodeId, 'nextKey:', nextKey, 'nextUrl:',
                    nextUrl)
                location.replace(nextUrl);
            }

            console.log('找到视频组件,开始静音并自动播放...', video)
            // 设置静音并播放
            video.muted = true
            // 设置倍速播放 支持以下速率: [2, 1.5, 1.2, 0.5] ；默认开启 如有问题请手动注释下面这行代码；或者邮箱反馈我
            video.playbackRate = 1.5
            video.play()
            if (courseArr.length == 2) {
                nextKey = `kcjs_${Number(courseArr[1]) + 1}`
            } else if (courseArr.length == 3) {
                nextKey = `kcjs_${courseArr[1]}_${Number(courseArr[2]) + 1}`
            }else{
                nextKey = `${Number(courseArr[0]) + 1}`
            }
            const nextUrl =
                `https://${window.location.host}${window.location.pathname}?teachPlanId=${params.teachPlanId}&periodId=${params.periodId}&courseId=${courseId}&nodeId=${nextKey}&category=${params.category}`
            console.log(params, 'currentId:', params.nodeId, 'nextKey:', nextKey, 'nextUrl:',
                nextUrl)
            // 视频播放结束,自动下一条视频
            video.addEventListener("ended", function() {
                location.replace(nextUrl);
            })
        }, 2000)
        // 打印播放进度
        getvideoprogress();
    }
})();

function UrlSearch() {
    var name, value;
    var str = location.href; //取得整个地址栏
    var num = str.indexOf("?")
    str = str.substr(num + 1); //取得所有参数   stringvar.substr(start [, length ]

    var arr = str.split("&"); //各个参数放到数组里
    for (var i = 0; i < arr.length; i++) {
        num = arr[i].indexOf("=");
        if (num > 0) {
            name = arr[i].substring(0, num);
            value = arr[i].substr(num + 1);
            this[name] = value;
        }
    }
}

// 检测当前播放的进度
function getvideoprogress() {
    setInterval(function() {
        var vid = parent.document.getElementsByTagName("video")[0]
        var currentTime = vid.currentTime.toFixed(1);
        console.log('当前进度:', currentTime);
    }, 10000);
}