// ==UserScript==
// @name         autoplay
// @namespace    http://tampermonkey.net/
// @version      0.1.5
// @description  ischinese
// @author       qiu6406
// @match        https://ischinese.cn/*
// @match        https://hn.ischinese.cn/*
// @icon         https://www.google.com/s2/favicons?domain=ischinese.cn
// @grant        none
// @downloadURL none
// ==/UserScript==

(function () {
    'use strict';

    var sections = document.getElementsByClassName("sectionNum");
    var items = document.getElementsByClassName("buyCourse_itemMain")
    var cursec = 0;

    //页面判断
    function checkUrl() {
        if (window.location.href.indexOf('play') > 0) {
            return 1;
        } else if (window.location.href.indexOf('buycourse') > 0) {
            return 2;
        } else {
            return -1;
        }

    }

    //获取课程位置并跳转
    function getPlayItem() {
        var pg = new RegExp("\\d*%","g");
        for (var i = 0; i < items.length; i++) {
            if(pg.exec(items[i].innerText) != '100%'){
                console.log("点击");
                items[1].getElementsByClassName('buyCourse_classStudy')[0].click();
                break;
            }
            else{
                //公共科目学习完毕,切换到专业科目
                console.log('专业科目课程列表');
                document.getElementsByClassName('cur')[0].firstChild.click();
            }
        }
    }

    //获取当前播放位置
    function getCurSec() {
        if (getCurSec == sections.length) {
            console.log('学习完毕！')
            window.location = "https://ischinese.cn/learncenter/buycourse";
        }
        for (var i = 0; i < sections.length; i++) {
            if (sections[i].parentNode.className == "active") {
                cursec = i;
            }
        }
    }

    //自动播放执行
    function check() {
        var video = document.getElementsByTagName("video")[0];
        getCurSec();
        if (video.currentTime == video.duration) {
            console.log("播放下一节");
            cursec = cursec + 1;
            sections[cursec].click();
        }
        else {
            if (video.paused) {
                video.play();
            }
            console.log('播放中第' + (cursec + 1) + '节:' + video.currentTime / video.duration * 100 + '%')
        }
    }

    function init() {
        switch (checkUrl()) {
            case -1:
                console.log("未找到正确页面");
                break;
            case 1:
                check();
                break;
            case 2:
                console.log('课程页面');
                getPlayItem();
                break;
        }
    }

    setInterval(init, 10000);
})();