// ==UserScript==
// @name         高等继续教育网自动刷课刷题
// @namespace    http://greasyfork.org/
// @version      1.2
// @description  高等继续教育网自动刷课刷题，只适用于该网址：?.jxjypt.cn
// @author       Roc.w
// @match        http*://*.jxjypt.cn/*
// @icon         https://www.jxjypt.cn/indexpage/images/icon.ico
// @grant        none
// @license      AGPL License
// @downloadURL none
// ==/UserScript==

console.log('您已进入高等继续教育网')

init()

function init() {
    let param = {
        ele: document.createElement('div'),
        css: "position:fixed;" +
        "bottom:100px;" +
        "box-shadow:10px 10px 10px gray;" +
        "right:20px;" +
        "display:block;" +
        "font-size:14px;" +
        "color:#fff;" +
        "z-index:1000;" +
        "height:70px;" +
        "width:70px;" +
        "background:#f44336;" +
        "border-radius:50%;" +
        "line-height:70px;" +
        "text-align:center;"+
        "cursor: pointer;"
    };
    document.querySelector('body').appendChild(((ele)=> {
        ele.id = 'smart-topic';
        ele.innerHTML = '一键观答';
        ele.style.cssText = param.css;
        return ele;
    })(param.ele));
}

//监听智能操作
document.getElementById("smart-topic").addEventListener("click", function(){
    watch();
    answer();
});

//作业答题
function answer(){

    //自动展开答案
    var zkjxs = document.getElementsByClassName('zkjx')
    for (let i = 0; i < zkjxs.length; i++)
    {
        zkjxs[i].click()
    }

    //自动填充填空、简答题答案
    var wenzis = document.getElementsByClassName('wenzi')
    for (let i = 0; i < wenzis.length; i++)
    {
        if((i%2)===0){
           var txt = wenzis[i].innerHTML.replace(/^\s*|\s*$/g, "").replace(/&nbsp;/gi, "")
           var textarea = document.getElementsByClassName('e__textarea')
           if (textarea.length>0) {
             textarea[(i/2)].value = txt
           }
           //有可能是课程选择题
           var danan = wenzis[(i/2)].innerHTML.replace(/^\s*|\s*$/g, "").replace(/&nbsp;/gi, "")
           var options = document.getElementsByClassName('m-question-option');
           for (let j = 0; j < options.length; j++) {
             var vale = options[j].getAttribute('data-value');
             if (danan==vale) {
                options[j].click()
             }
           }
        }
    }

    //自动选择选择题答案
    var rights = document.getElementsByClassName('right')
    for (let i = 0; i < rights.length; i++) {
        var daan = rights[i].innerHTML
        var answers = document.getElementsByClassName('sub-answer sub-picon-no clearfix ')
        for (let j = 0; j < answers[i].children.length; j++) {
            var val = answers[i].children[j].getAttribute('data-value');
            for (let k = 0; k < daan.length; k++) {
                if (daan[k]==val) {
                    answers[i].children[j].click()
                }
            }
        }
    }
}

//观看课程
async function watch() {
    var courses = document.getElementsByClassName('z-gery-icon')
    for (let i = 0; i < courses.length; i++) {
       await (function(){
            return new Promise(function(res, rej){
                setTimeout(function(){
                    courses[i].click();
                    try {
                        var jid = courses[i].getAttribute('data-jie-id');
                        if (jid) {
                            var pid = document.getElementsByClassName('sub-content m-question')[0].getAttribute('data-pid');
                            var qid = document.getElementsByClassName('sub-content m-question')[0].getAttribute('data-qid');
                            var sid = document.getElementsByClassName('sub-content m-question')[0].getAttribute('data-sid');
                            var answer = document.getElementsByClassName('wenzi')[0].innerHTML.replace(/^\s*|\s*$/g, "").replace(/&nbsp;/gi, "");
                            var param = 'sid='+sid+'&jid='+jid+'&qid='+qid+'&pid='+pid+'&answer='+answer+''
                            console.log('提交答案---'+param)
                            var callback = function(data) { console.log(data) }
                            postData('/classroom/question/submit',param,callback)
                        }
                    } catch (error) {
                    }
                    res();
                },2000)
            })
        }())
    }
    if (courses.length>0) {
        location.reload()
    }
}

//psot请求
function postData(url, param, callback) {
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
        if(xhr.readyState == 4) {
            if((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304){
                callback && callback(xhr.responseText);
            }
        }
    }
    xhr.open('POST', url, true);
    xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=UTF-8');
    xhr.send(param);
}