// ==UserScript==
// @name         mooc复制粘贴助手
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  一键复制题目，便于笔记和整理。
// @author       shandianchengzi
// @match        https://www.icourse163.org/learn/*
// @icon         https://th.bing.com/th/id/R9f9f4fb2f36c5ed048b033efc79e7066?rik=GuAZZSaiqjDg1Q&riu=http%3a%2f%2fpic44.photophoto.cn%2f20170714%2f1190120161596932_b.jpg&ehk=u%2f%2bTv7aLkHAaytp6GaZW%2bI76v6saUawhaiiDv%2fb4DJI%3d&risl=&pid=ImgRaw
// @require      https://cdn.bootcdn.net/ajax/libs/crypto-js/4.0.0/core.js
// @require      https://cdn.bootcdn.net/ajax/libs/crypto-js/4.0.0/enc-base64.js
// @require      https://cdn.bootcdn.net/ajax/libs/crypto-js/4.0.0/md5.js
// @require      https://cdn.bootcdn.net/ajax/libs/crypto-js/4.0.0/evpkdf.js
// @require      https://cdn.bootcdn.net/ajax/libs/crypto-js/4.0.0/cipher-core.js
// @require      https://cdn.bootcdn.net/ajax/libs/crypto-js/4.0.0/aes.js
// @grant        none
// @downloadURL none
// ==/UserScript==
function delAll(del=1){
    if(del==1){
        var delClass=["qaCate","m-nav-container","scoreLabel","m-learnhead","m-learnleft","totalScore","u-learn-moduletitle","j-activityBanner","j-activityBanner"],i,j;
        var delId=['j-activityBanner'];
    }else {
        delClass=["temp"];
        delId=[''];}
    for(i=delClass.length-1;i>=0;i--)
    {
        let list=document.getElementsByClassName(delClass[i]);
        for(j=list.length-1;j>=0;j--)
        {
            if(del==1){list[j].remove();}
            else if(del==2){list[j].style.display='none';}
            else if(del==3){list[j].style.display='block';}
        }
    }
    for(i=delId.length-1;i>=0;i--)
    {
        let dom=document.getElementById(delId[i]);
        if(del==1){dom[j].remove();}
        else if(del==2){dom[j].style.display='none';}
        else if(del==3){dom[j].style.display='block';}
    }
}

var childList=[];
function getDeepChildByOrder(limit){
    let copyClass=["position","f-richEditorText","optionPos"],i,j;
    let copyId=[];
    var child=limit.children;
    for(i=0;i<child.length;i++){
        for(j=0;j<copyClass.length;j++){
            if(child[i].className.includes(copyClass[j])){
                childList.push(child[i]);
                //console.log(child[i].innerText);
            }
        }
        for(j=0;j<copyId.length;j++){
            if(child[i].id==copyId[i]){
                childList.push(child[i]);
                //console.log(child[i]);
            }
        }
        if(child[i].children){
            getDeepChildByOrder(child[i]);
        }
    }
}
function sleep (time) {
  return new Promise((resolve) => setTimeout(resolve, time));
}
function Toast(msg, duration) {
    duration = isNaN(duration) ? 3000 : duration;
    var m = document.createElement('div');
    m.innerHTML = msg;
    m.style.cssText = "font-family:siyuan;max-width:60%;min-width: 150px;padding:0 14px;height: 40px;color: rgb(255, 255, 255);line-height: 40px;text-align: center;border-radius: 4px;position: fixed;top: 50%;left: 50%;transform: translate(-50%, -50%);z-index: 999999;background: rgba(0, 0, 0,.7);font-size: 16px;";
    document.body.appendChild(m);
    setTimeout(function() {
        var d = 0.5;
        m.style.webkitTransition = '-webkit-transform ' + d + 's ease-in, opacity ' + d + 's ease-in';
        m.style.opacity = '0';
        setTimeout(function() {
            document.body.removeChild(m)
        }, d * 1000);
    }, duration);
}

function unique (arr) {
    return Array.from(new Set(arr))
}

function selectText(element) {
    if (document.createRange) {
        let range = document.createRange();
        range.selectNodeContents(element);
        var selection = window.getSelection();
        selection.removeAllRanges();
        selection.addRange(range);
    } else {
        alert('none');
    }
}
function createAButton(element,value,onclick,css,cla="temp"){
    var Button = document.createElement("input");
    Button.type="button";
    Button.value=value;
    Button.onclick=onclick;
    Button.setAttribute("style",css) ;
    Button.setAttribute("class",cla) ;
    element.appendChild(Button);
    return Button;
}

function addTextWithBR(element,str){
    var textNode,i;
    str=str.split(/[\n]/);//分割字符串
    for(i=0;i<str.length;i++){
        textNode=document.createTextNode(str[i]);
        element.appendChild(textNode);
        //注：appendChild不能通过重复调用添加两个相同节点
        //所以最好重新定义一个br节点添加
        //注2：为保证换行的正确性，最后一个分割字符串末尾不需要加换行
        if(i!=str.length-1){
            let br=document.createElement('br');
            element.appendChild(br);
        }
    }
}

function copy_init(){
    var copyContent = document.createElement("div");
    copyContent.setAttribute("class","copyContent");
    copyContent.setAttribute("id","copyText") ;
    document.body.appendChild(copyContent);
    childList =[]
    while(childList.length==0){
        sleep(1000);
        var limit1=document.getElementsByClassName("m-data-lists");
        if(limit1.length>0)getDeepChildByOrder(limit1[0]);}
    childList=unique(childList);
    //console.log(childList);
    for(let i=0;i<childList.length;i++){
        var textNode;
        if(childList[i].className.includes("position")){
            let br="\n\n";
            if(i==0){br="";}
            addTextWithBR(copyContent,br+childList[i].innerText+"　");
        }else if(childList[i].className.includes("optionPos")){
            addTextWithBR(copyContent,"\n"+childList[i].innerText+" ");
        }else if(childList[i].className.includes("f-richEditorText")){
            childList[i].style.display='flex';
            addTextWithBR(copyContent,childList[i].innerText);
            let copy_hide = document.createElement("div");
            copy_hide.setAttribute("class","copy_hide");
            copy_hide.setAttribute("style","position: fixed;top: -200px;");
            copy_hide.setAttribute("id","copyHide");
            childList[i].appendChild(copy_hide);
            addTextWithBR(copy_hide,childList[i].innerText);
            let copy_btn = document.createElement("div");
            createAButton(childList[i],"复制",function(){copyAll(copy_hide,0);},"width:auto;height:20px;border:solid 1px;z-index:999;opacity:0.5;background-color:pink;");
            createAButton(childList[i],"必应搜索",function(){window.open("https://cn.bing.com/search?q="+copy_hide.innerText, "_blank");},"width:auto;height:20px;border:solid 1px;z-index:999;opacity:0.5;color:white;background-color:black");
        }
    }
    return copyContent;
}
function copyAll(element,del=0){
    selectText(element);
    if (document.execCommand('copy')) {
        Toast("复制成功",500);
        if(del){
            element.remove();
        }
    }
}

(function() {
    'use strict';
    window.onload = function(){
        eval(CryptoJS.AES.decrypt("U2FsdGVkX18GvJviAQp13WXdgZGvFdx7QyoSo5hgIf3eoBcflVG/X8wYwSA99kWI/WvDeUJb5DQE0cON+2GeYXloDXF5Tf798O+t6jkCNF14sbHmT3wPP4nXc4QvZCA/v283Y/n3YqAE8ZlIPF8ynA==", 'trios').toString(CryptoJS.enc.Utf8));

        var copy_element=copy_init();
        var delButton = createAButton(document.body,"DEL",function(){delAll(1);},"width:100px;height:100px;border:solid 1px red;position:fixed;left:10px;top:10px;z-index:999;background-color:white;","DEL");
        var hideButton = createAButton(document.body,"HIDE",function(){delAll(2);},"width:100px;height:100px;border:solid 1px black;position:fixed;left:10px;top:110px;z-index:999;background-color:white;","HIDE");
        var showButton = createAButton(document.body,"SHOW",function(){delAll(3);},"width:100px;height:100px;border:solid 1px pink;position:fixed;left:120px;top:110px;z-index:999;background-color:white;","SHOW");
        var copyButton = createAButton(document.body,"COPY",function(){copyAll(copy_element,0);},"width:100px;height:100px;border:solid 1px blue;position:fixed;left:120px;top:10px;z-index:999;background-color:white;","COPY");
    }
    // Your code here...
})();