// ==UserScript==
// @name         WJX producer
// @namespace    https://blog.csdn.net/SundaySmarty
// @version      1.0.4
// @description  Make producing wjx easier
// @author       SundaySmarty
// @match        https://www.wjx.cn/mysojump/questionnairemng/designnew.aspx*
// @icon         https://www.wjx.cn/images/commonImgPC/logo@2x.png
// @grant        none
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    function sleep(time){
        return new Promise(resolve => setTimeout(resolve, time));
    }

    Array.prototype.remove = function(val) {
        var index = this.indexOf(val);
        if(index > -1) {
            this.splice(index, 1);
        }
    };

    function getRadioValue(radioName){
        let radio = document.getElementsByName(radioName);
        for(let i = 0; i < radio.length; i++){
            if(radio[i].checked) {
                return radio[i].value;
            }
        }
    }

    // Basic structure
    let producerButton = document.createElement("button");
    producerButton.textContent = "WJX producer";
    producerButton.style.paddingLeft = "20px";
    producerButton.style.paddingRight = "20px";
    producerButton.style.height = "30px";
    producerButton.style.textAlign = "center";
    producerButton.style.background = "thistle";
    producerButton.style.color = "white";
    producerButton.style.border = "1px solid thistle";
    producerButton.style.borderRadius = "4px";
    producerButton.style.position = "fixed";
    producerButton.style.top = "0";
    producerButton.style.right = "0";
    producerButton.style.zIndex = "2000";
    producerButton.addEventListener("click", clickProducerButton);

    let producer = document.createElement("div");
    producer.style.width = "40%";
    producer.style.height = "100%";
    producer.style.background = "white";
    producer.style.position = "fixed";
    producer.style.top = "0";
    producer.style.right = "0";
    producer.style.display = "none";
    producer.style.zIndex = "1000";

    let producerContainer = document.createElement("div");
    producerContainer.style.width = "80%";
    producerContainer.style.height = "80%";
    producerContainer.style.padding = "10%";
    producerContainer.style.overflowY = "auto";
    producerContainer.style.overflowX = "hidden";

    let producerHeaderContainer = document.createElement("div");
    producerHeaderContainer.style.width = "90%";
    producerHeaderContainer.style.textAlign = "center";
    producerHeaderContainer.style.margin = "5%";

    let producerHeader = document.createElement("p");
    producerHeader.innerHTML = "WJX producer";
    producerHeader.style.fontSize = "24px";
    producerHeader.style.fontWeight = "bold";
    producerHeader.style.color = "black";

    let contentContainer = document.createElement("div");
    contentContainer.style.width = "100%";

    let usageButton = document.createElement("button");
    usageButton.textContent = "Usage";
    usageButton.style.paddingLeft = "20px";
    usageButton.style.paddingRight = "20px";
    usageButton.style.height = "30px";
    usageButton.style.textAlign = "center";
    usageButton.style.background = "thistle";
    usageButton.style.color = "white";
    usageButton.style.border = "1px solid thistle";
    usageButton.style.borderRadius = "4px";
    usageButton.style.position = "fixed";
    usageButton.style.top = "0";
    usageButton.style.zIndex = "3000";
    usageButton.addEventListener("click", clickUsageButton);

    let usage = document.createElement("div");
    usage.style.width = "40%";
    usage.style.height = "100%";
    usage.style.background = "white";
    usage.style.position = "fixed";
    usage.style.top = "0";
    usage.style.right = "0";
    usage.style.display = "none";
    usage.style.zIndex = "2500";

    let usageContainer = document.createElement("div");
    usageContainer.style.width = "80%";
    usageContainer.style.height = "80%";
    usageContainer.style.padding = "10%";
    usageContainer.style.overflowY = "auto";
    usageContainer.style.overflowX = "hidden";

    let usageHeaderContainer = document.createElement("div");
    usageHeaderContainer.style.width = "90%";
    usageHeaderContainer.style.textAlign = "center";
    usageHeaderContainer.style.margin = "5%";

    let usageHeader = document.createElement("p");
    usageHeader.innerHTML = "WJX producer usage";
    usageHeader.style.fontSize = "24px";
    usageHeader.style.fontWeight = "bold";
    usageHeader.style.color = "black";

    let usageContentContainer = document.createElement("div");
    usageContentContainer.style.width = "100%";

    document.body.appendChild(producerButton);
    document.body.appendChild(producer);
    producer.appendChild(producerContainer);
    producerContainer.appendChild(producerHeaderContainer);
    producerHeaderContainer.appendChild(producerHeader);
    producerContainer.appendChild(contentContainer);
    producer.appendChild(usageButton);
    producer.appendChild(usage);
    usage.appendChild(usageContainer);
    usageContainer.appendChild(usageHeaderContainer);
    usageHeaderContainer.appendChild(usageHeader);
    usageContainer.appendChild(usageContentContainer);

    writePInUsage('A textbox will appear when you enter WJX Producer.');
    writePInUsage('The format of your input in this textbox is "S/N of your question; number of choices; score of each question; available choices"(no quotation marks).');
    writePInUsage('For example, if you enter "1~2,5;4;1;ABCDEFGH", then Question 1, 2 and 5 will be produced. Each of the three questions will have 4 choices and a score of 1. The available choices of question 1 and 5 will be ABCD and the available choices of question 2 will be EFGH.');
    writeImgInUsage("https://s6.imgcdn.dev/rSdRe.png");
    writePInUsage('After clicking Confirm Button, you can set answers for each of your questions as shown below.');
    writeImgInUsage("https://s6.imgcdn.dev/rSWUC.png");

    let canFocus = false;
    function clickProducerButton() {
        if(producer.style.display == "none") {
            producer.style.display = "block";
            producerButton.textContent = "Close";
            if(canFocus) {
                MCNumInput.focus();
            }
        }
        else {
            producer.style.display = "none";
            producerButton.textContent = "WJX producer";
        }
    }

    function clickUsageButton() {
        if(usage.style.display == "none") {
            usage.style.display = "block";
            usageButton.textContent = "Close";
            producerButton.style.display = "none";
        }
        else {
            usage.style.display = "none";
            usageButton.textContent = "Usage";
            producerButton.style.display = "block";
            if(canFocus) {
                MCNumInput.focus();
            }
        }
    }

    function writePInUsage(text) {
        let p = document.createElement("p");
        p.style.width = "90%";
        p.style.margin = "5%";
        p.style.fontSize = "18px";
        p.style.color = "black";
        p.style.wordBreak = "normal";
        p.innerHTML = text;
        usageContentContainer.appendChild(p);
    }

    function writeImgInUsage(imgURL) {
        let imgContainer = document.createElement("div");
        imgContainer.style.textAlign = "center";
        let img = document.createElement("img");
        img.setAttribute("src", imgURL);
        img.style.width = "80%";
        usageContentContainer.appendChild(imgContainer);
        imgContainer.appendChild(img);
    }

    let testQuestionBar = document.getElementById("divKaoShiT");
    let MCNumInputList = [];

    if(testQuestionBar.style.display != "none") {
        let MCHeaderContainer = document.createElement("div");
        MCHeaderContainer.style.width = "90%";
        MCHeaderContainer.style.margin = "5%";
        let MCHeader = document.createElement("p");
        MCHeader.innerHTML = "Multiple Choice";
        MCHeader.style.fontWeight = "bold";
        MCHeader.style.fontSize = "20px";
        MCHeader.style.color = "black";
        contentContainer.appendChild(MCHeaderContainer);
        MCHeaderContainer.appendChild(MCHeader);

        let MCNumInputContainer = document.createElement("div");
        MCNumInputContainer.style.width = "90%";
        MCNumInputContainer.style.margin = "5%";
        var MCNumInput = document.createElement("input");
        MCNumInput.setAttribute("type", "text");
        MCNumInput.style.width = "100%";
        MCNumInput.style.height = "30px";
        MCNumInput.style.fontSize = "20px";
        contentContainer.appendChild(MCNumInputContainer);
        MCNumInputContainer.appendChild(MCNumInput);
        MCNumInputList.push(MCNumInput);

        var singleMultiContainer = document.createElement("div");
        singleMultiContainer.style.width = "90%";
        singleMultiContainer.style.margin = "5%";
        var single = document.createElement("input");
        single.setAttribute("type", "radio");
        single.setAttribute("id", "single");
        single.setAttribute("name", "MC");
        single.setAttribute("value", 0);
        single.setAttribute("checked", true);
        let singleLabel = document.createElement("label");
        singleLabel.innerHTML = "Single Answer ";
        singleLabel.style.color = "black";
        singleLabel.style.fontSize = "15px";
        singleLabel.setAttribute("for", "single");
        var multi = document.createElement("input");
        multi.setAttribute("type", "radio");
        multi.setAttribute("id", "multi");
        multi.setAttribute("name", "MC");
        multi.setAttribute("value", 1);
        let multiLabel = document.createElement("label");
        multiLabel.innerHTML = "Multi Answer ";
        multiLabel.style.color = "black";
        multiLabel.style.fontSize = "15px";
        multiLabel.setAttribute("for", "multi");
        contentContainer.appendChild(singleMultiContainer);
        singleMultiContainer.appendChild(single);
        singleMultiContainer.appendChild(singleLabel);
        singleMultiContainer.appendChild(multi);
        singleMultiContainer.appendChild(multiLabel);

        var submitButtonContainer = document.createElement("div");
        submitButtonContainer.style.width = "90%";
        submitButtonContainer.style.margin = "5%";
        submitButtonContainer.style.display = "flex";
        submitButtonContainer.style.flexDirection = "column";
        submitButtonContainer.style.alignItems = "center";
        var confirmButton = document.createElement("button");
        confirmButton.style.paddingLeft = "20px";
        confirmButton.style.paddingRight = "20px";
        confirmButton.style.height = "30px";
        confirmButton.style.marginBottom = "3%";
        confirmButton.textContent = "Confirm";
        confirmButton.addEventListener("click", clickConfirmButton);
        var backButton = document.createElement("button");
        backButton.style.display = "none";
        backButton.style.paddingLeft = "20px";
        backButton.style.paddingRight = "20px";
        backButton.style.height = "30px";
        backButton.style.marginBottom = "3%";
        backButton.textContent = "Back";
        backButton.addEventListener("click", clickBackButton);
        contentContainer.appendChild(submitButtonContainer);
        submitButtonContainer.appendChild(confirmButton);
        submitButtonContainer.appendChild(backButton);

        var covering = document.createElement("div");
        covering.style.width = "100%";
        covering.style.height = "100%";
        covering.style.background = "grey";
        covering.style.opacity = "0.4";
        covering.style.position = "fixed";
        covering.style.top = "0";
        covering.style.left = "0";
        covering.style.display = "none";
        covering.style.zIndex = "800";
        document.body.appendChild(covering);

        producer.addEventListener("keydown", function(e) {
            if(e.keyCode === 13) {clickConfirmButton();}
        });

        canFocus = true;
    }

    let pos = 0;
    let numOfChoice = 0;
    let score = 0;
    let startChoice = [];
    let MCInputList = [];
    let continuousMC = [];
    let scoreAvailable = [0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 60, 70, 80, 90, 100];
    function clickConfirmButton() {
        if(pos == 0) {
            let stop = false;
            MCNumInput.value = MCNumInput.value.replace(/\s*/g,"");
            // isEmpty
            if(MCNumInput.value.length == 0) stop = true;
            let input = MCNumInput.value.split(";");
            // isFourPart
            if(!stop && input.length != 4) {stop = true; window.alert("Wrong Input!");}
            if(!stop) {
                // isPartEmpty
                for(let i = 0; i < input.length; i++) {
                    if(input[i] == "") {
                        stop = true;
                        window.alert("Wrong Input!");
                        break;
                    }
                }
                if(!stop) {
                    // lastThreePart
                    if(isNaN(Number(input[1])) || isNaN(Number(input[2])) || !(Number(input[1]) >= 2) || !(Number.isInteger(Number(input[1]))) || !(scoreAvailable.indexOf(Number(input[2])) >= 0) || !(/^[a-zA-Z]+$/.test(input[3]))) {
                        stop = true;
                        window.alert("Wrong Input!");
                    }
                    if(!stop) {
                        numOfChoice = Number(input[1]);
                        score = Number(input[2]);
                        input[3] = input[3].toUpperCase();
                        startChoice = input[3].split("");
                        // lastPartNum
                        if(startChoice.length % numOfChoice != 0) {
                            stop = true;
                            window.alert("Wrong Input!");
                        }
                        if(!stop) {
                            // isFirstPartEmpty
                            let MCNumSection = input[0].split(',');
                            for(let i = 0; i < MCNumSection.length; i++) {
                                if(MCNumSection[i] == "") {
                                    stop = true;
                                    window.alert("Wrong Input!");
                                    break;
                                }
                            }
                            if(!stop) {
                                // checkOverlap
                                continuousMC = [];
                                let checkOverlapList = [];
                                for(let i = 0; i < MCNumSection.length; i++) {
                                    let range = MCNumSection[i].split('~');
                                    if(range.length == 1) {
                                        if(range[0] == "" || isNaN(Number(range[0])) || !(Number.isInteger(Number(range[0]))) || Number(range[0]) <= 0) {
                                            stop = true;
                                            window.alert("Wrong Input!");
                                            break;
                                        }
                                        else {
                                            if(!checkOverlapList.includes(Number(range[0]))) checkOverlapList.push(Number(range[0]));
                                            else {
                                                stop = true;
                                                window.alert("Wrong Input!");
                                                break;
                                            }
                                            continuousMC.push([Number(range[0]), 1]);
                                        }
                                    }
                                    else if(range.length == 2) {
                                        if(range[0] == "" || range[1] == "" || isNaN(Number(range[0])) || isNaN(Number(range[1])) || !(Number.isInteger(Number(range[0]))) || !(Number.isInteger(Number(range[1]))) || Number(range[1]) < Number(range[0]) || Number(range[0]) <= 0) {
                                            stop = true;
                                            window.alert("Wrong Input!");
                                            break;
                                        }
                                        else {
                                            for(let j = Number(range[0]); j <= Number(range[1]); j++) {
                                                if(!checkOverlapList.includes(j)) checkOverlapList.push(j);
                                                else {
                                                    stop = true;
                                                    window.alert("Wrong Input!");
                                                    break;
                                                }
                                            }
                                            if(!stop) {
                                                let nAtALine = 15;
                                                if(getRadioValue("MC") == 1) nAtALine = 5;
                                                let j = Number(range[0]);
                                                while(j + nAtALine - 1 <= Number(range[1])) {
                                                    continuousMC.push([j, nAtALine]);
                                                    j += nAtALine;
                                                }
                                                if(Number(range[1]) >= j) continuousMC.push([j, Number(range[1]) - j + 1]);
                                            }
                                        }
                                    }
                                    else {
                                        stop = true;
                                        window.alert("Wrong Input!");
                                        break;
                                    }
                                }
                                if(!stop) {
                                    pos++;
                                    MCNumInput.style.display = "none";
                                    backButton.style.display = "block";
                                    singleMultiContainer.style.display = "none";

                                    MCInputList = [];
                                    continuousMC = continuousMC.sort(function(a, b){return a[0] - b[0];});
                                    for(let j = 0; j < continuousMC.length; j++) {
                                        let MCTitleContainer = document.createElement("div");
                                        MCTitleContainer.style.width = "90%";
                                        MCTitleContainer.style.margin = "5%";
                                        let MCTitle = document.createElement("p");
                                        MCTitle.style.color = "black";
                                        MCTitle.style.fontSize = "18px";
                                        if(continuousMC[j][1] == 1) MCTitle.innerHTML = continuousMC[j][0];
                                        else MCTitle.innerHTML = continuousMC[j][0] + '~' + (continuousMC[j][0] + continuousMC[j][1] - 1);
                                        let MCInputContainer = document.createElement("div");
                                        MCInputContainer.style.width = "90%";
                                        MCInputContainer.style.margin = "5%";
                                        let MCInput = document.createElement("input");
                                        MCInput.setAttribute("type", "text");
                                        MCInput.style.width = "100%";
                                        MCInput.style.height = "30px";
                                        MCInput.style.fontSize = "20px";
                                        contentContainer.insertBefore(MCTitleContainer, submitButtonContainer);
                                        MCTitleContainer.appendChild(MCTitle);
                                        contentContainer.insertBefore(MCInputContainer, submitButtonContainer);
                                        MCInputContainer.appendChild(MCInput);
                                        MCInputList.push(MCInput);
                                    }
                                    for(let k = 0; k < MCInputList.length; k++) {
                                        let prev = k - 1;
                                        let next = k + 1;
                                        if(prev < 0) prev += MCInputList.length;
                                        if(next == MCInputList.length) next = 0;
                                        // eslint-disable-next-line no-loop-func
                                        MCInputList[k].addEventListener("keydown", function(e) {
                                            if(e.keyCode === 38) {
                                                MCInputList[prev].focus();
                                            }
                                            else if(e.keyCode === 40) {
                                                MCInputList[next].focus();
                                            }
                                        });
                                    }

                                    covering.style.display = "block";
                                    confirmButton.disabled = true;
                                    backButton.disabled = true;
                                    for(let i = 0; i < MCInputList.length; i++) MCInputList[i].disabled = true;
                                    (async () => {
                                        let lastPos = await clearQuestion();
                                        await addMC((continuousMC[continuousMC.length - 1][0] + continuousMC[continuousMC.length - 1][1] - 1) - lastPos, getRadioValue("MC"));
                                        await setScoreAndNum(numOfChoice, score, continuousMC);
                                    })()
                                        .then(() => {
                                        MCNumInput.value = "";
                                        covering.style.display = "none";
                                        confirmButton.disabled = false;
                                        backButton.disabled = false;
                                        for(let i = 0; i < MCInputList.length; i++) MCInputList[i].disabled = false;
                                        MCInputList[0].focus();
                                    })
                                }
                            }
                        }

                    }
                }
            }
        }
        else if(pos == 1) {
            let stop = false;
            let numOfQuestion = 0;
            let choiceNumList = [];
            if(getRadioValue("MC") == 0) {
                for(let i = 0; i < MCInputList.length; i++) {
                    MCInputList[i].value = MCInputList[i].value.replace(/\s*/g,"");
                    if(MCInputList[i].value.length != continuousMC[i][1] || !(/^[a-zA-Z]+$/.test(MCInputList[i].value))) {
                        stop = true;
                        window.alert("Wrong Input!");
                        break;
                    }
                    if(!stop) {
                        MCInputList[i].value = MCInputList[i].value.toUpperCase();
                        let tempNumList = [];
                        for(let j = 0; j < MCInputList[i].value.length; j++) {
                            let flag = false;
                            for(let k = 0; k < numOfChoice; k++) {
                                if(MCInputList[i].value[j] == startChoice[(numOfQuestion % (startChoice.length / numOfChoice)) * numOfChoice + k]) {
                                    flag = true;
                                    tempNumList.push(k);
                                }
                            }
                            if(!flag) {
                                stop = true;
                                window.alert("Wrong Input!");
                                break;
                            }
                            numOfQuestion++;
                        }
                        choiceNumList.push(tempNumList);
                    }
                    MCInputList[i].value = MCInputList[i].value.replace(/(.{5})/g, '$1 ');
                    MCInputList[i].value = MCInputList[i].value.trim();
                }
            }
            if(getRadioValue("MC") == 1) {
                for(let i = 0; i < MCInputList.length; i++) {
                    MCInputList[i].value = MCInputList[i].value.replace(/\s*/g,"");
                    MCInputList[i].value = MCInputList[i].value.toUpperCase();
                    let multiList = MCInputList[i].value.match(/\[[A-Z]{2,}\]/g);
                    let allList = MCInputList[i].value.match(/\[.+?\]/g);
                    if(multiList == null || multiList.length != continuousMC[i][1] || multiList.length != allList.length) {
                        stop = true;
                        window.alert("Wrong Input!");
                        break;
                    }
                    if(!stop) {
                        let tempNumList = [];
                        for(let j = 0; j < multiList.length; j++) {
                            let subTempNumList = [];
                            for(let n = 1; n < multiList[j].length - 1; n++) {
                                let flag = false;
                                for(let k = 0; k < numOfChoice; k++) {
                                    if(multiList[j][n] == startChoice[(numOfQuestion % (startChoice.length / numOfChoice)) * numOfChoice + k]) {
                                        flag = true;
                                        subTempNumList.push(k);
                                    }
                                }
                                if(!flag) {
                                    stop = true;
                                    window.alert("Wrong Input!");
                                    break;
                                }
                            }
                            tempNumList.push(subTempNumList);
                            numOfQuestion++;
                        }
                        choiceNumList.push(tempNumList);
                    }
                }
            }
            if(!stop) {
                setAnswer(continuousMC, choiceNumList, getRadioValue("MC"));
            }
        }
    }

    async function activateQuestion() {
        let question = document.getElementsByClassName("div_question");
        for(let i = 0; i < question.length; i++) {
            if(question[i].getAttribute("title") === null || question[i].getAttribute("title") == "") {
                question[i].children[0].dispatchEvent(new MouseEvent("mouseover",{"bubbles": true}));
                await sleep(1);
                question[i].children[0].click();
                await sleep(1);
                question[i].children[0].click();
                await sleep(1);
            }
        }
    }

    async function clearQuestion() {
        let question = document.getElementsByClassName("div_question");
        let i = question.length - 1;
        let lastPos = 0;
        await activateQuestion()
            .then(() => {
            while(i >= 0) {
                if((question[i].getAttribute("title") === null || question[i].getAttribute("title") == "") && question[i].children[0].children[0].children[0].textContent != "") {
                    if(parseFloat(question[i].children[0].children[0].children[0].textContent) < continuousMC[0][0]) {
                        lastPos = parseFloat(question[i].children[0].children[0].children[0].textContent);
                        break;
                    }
                    question[i].children[0].children[2].children[3].children[0].children[2].dispatchEvent(new MouseEvent("mouseover",{"bubbles": true}));
                    question[i].children[0].children[2].children[3].children[0].children[2].children[0].dispatchEvent(new MouseEvent("click",{"bubbles": true}));
                }
                else break;
                i--;
            }
        });
        return lastPos;
    }

    async function addMC(n, opt) {
        let questionTypeList = testQuestionBar.children[1].children[1];
        let MC1 = questionTypeList.children[0].children[0];
        let MC2 = questionTypeList.children[2].children[0];
        if(opt == 0) {
            for(let i = 0; i < n; i++) {
                MC1.click();
            }
        }
        if(opt == 1) {
            for(let i = 0; i < n; i++) {
                MC2.click();
            }
        }
    }

    async function setScoreAndNum(num, score, MCList) {
        let question = document.getElementsByClassName("div_question");
        await activateQuestion()
            .then(() => {
            let k = 0;
            let numOfQuestion = 0;
            for(let i = 0; i < MCList.length; i++) {
                for(let j = MCList[i][0]; j < MCList[i][0] + MCList[i][1]; j++) {
                    while(true) {
                        if((question[k].getAttribute("title") === null || question[k].getAttribute("title") == "") && question[k].children[0].children[0].children[0].textContent != "") {
                            if(question[k].children[0].children[0].children[0].textContent == j) {
                                question[k].children[0].click();
                                let scoreSelect = question[k].children[1].children[0].children[1].children[2].children[3].children[0].children[0].children[1];
                                let choice = question[k].children[1].children[0].children[3].children[1].children[0].children[1].children[0].children[0];
                                let addChoice = choice.children[1].children[0].children[1];
                                scoreSelect.value = score;
                                scoreSelect.dispatchEvent(new Event("change", {"bubbles": true}));
                                for(let i = 0; i < num - 2; i++) {
                                    addChoice.click();
                                }
                                for(let i = 0; i < num; i++) {
                                    let choiceInput = choice.children[i + 1].children[0].children[0];
                                    choiceInput.value = startChoice[(numOfQuestion % (startChoice.length / num)) * num + i];
                                }
                                question[k].children[0].click();
                                numOfQuestion++;
                                break;
                            }
                        }
                        k++;
                    }
                }
            }
            if(numOfQuestion == 1) question[k].children[0].click();
        });
    }

    function setAnswer(MCList, choiceNumList, opt) {
        let question = document.getElementsByClassName("div_question");
        let k = 0;
        if(opt == 0) {
            let pos = 0;
            for(let i = 0; i < MCList.length; i++) {
                let numOfQuestion = 0;
                for(let j = MCList[i][0]; j < MCList[i][0] + MCList[i][1]; j++) {
                    while(true) {
                        if((question[k].getAttribute("title") === null || question[k].getAttribute("title") == "") && question[k].children[0].children[0].children[0].textContent != "") {
                            if(question[k].children[0].children[0].children[0].textContent == j) {
                                question[k].children[0].click();
                                let selected = question[k].children[0].children[1].children[1].children[1].getElementsByTagName("li");
                                for(let n = 0; n < selected.length; n++) if(selected[n].children[0].children[0] !== null && typeof selected[n].children[0].children[0] !== "undefined") pos = n;
                                let choice = question[k].children[1].children[0].children[3].children[1].children[0].children[1].children[0].children[0];
                                if(choiceNumList[i][numOfQuestion] != pos) choice.children[choiceNumList[i][numOfQuestion] + 1].children[5].children[0].children[1].click();
                                question[k].children[0].click();
                                numOfQuestion++;
                                break;
                            }
                        }
                        k++;
                    }
                }
            }
        }
        if(opt == 1) {
            for(let i = 0; i < MCList.length; i++) {
                let numOfQuestion = 0;
                for(let j = MCList[i][0]; j < MCList[i][0] + MCList[i][1]; j++) {
                    while(true) {
                        if((question[k].getAttribute("title") === null || question[k].getAttribute("title") == "") && question[k].children[0].children[0].children[0].textContent != "") {
                            if(question[k].children[0].children[0].children[0].textContent == j) {
                                question[k].children[0].click();
                                let selected = question[k].children[0].children[1].children[1].children[1].getElementsByTagName("li");
                                let choice = question[k].children[1].children[0].children[3].children[1].children[0].children[1].children[0].children[0];
                                for(let n = 0; n < selected.length; n++) {
                                    if(selected[n].children[0].children[0] !== null && typeof selected[n].children[0].children[0] !== "undefined") {
                                        choice.children[n + 1].children[5].children[0].children[1].click();
                                    }
                                }
                                for(let x = 0; x < choiceNumList[i][numOfQuestion].length; x++) {
                                    choice.children[choiceNumList[i][numOfQuestion][x] + 1].children[5].children[0].children[1].click();
                                }
                                question[k].children[0].click();
                                numOfQuestion++;
                                break;
                            }
                        }
                        k++;
                    }
                }
            }
        }
    }

    function clickBackButton() {
        pos--;
        MCNumInput.style.display = "block";
        backButton.style.display = "none";
        singleMultiContainer.style.display = "block";
        for(let i = 0; i < MCInputList.length; i++) {
            const a = MCInputList[i].parentNode;
            const b = a.previousElementSibling;
            const c = a.parentNode;
            c.removeChild(a);
            c.removeChild(b);
        }
        MCInputList = [];
    }

})();