// ==UserScript==
// @name         Auto grading
// @namespace    http://tampermonkey.net/
// @version      0.4.0
// @description  USTC 自动评价 tqm.ustc.edu.cn
// @author       PRO_2684
// @match        https://tqm.ustc.edu.cn/index.html*
// @icon         https://tqm.ustc.edu.cn/favicon.ico
// @grant        none
// @license      gpl-3.0
// @require      https://greasyfork.org/scripts/468177-%E6%95%99%E5%AD%A6%E8%B4%A8%E9%87%8F%E7%AE%A1%E7%90%86%E5%B9%B3%E5%8F%B0%E6%A0%87%E5%87%86%E7%AD%94%E6%A1%88/code/%E6%95%99%E5%AD%A6%E8%B4%A8%E9%87%8F%E7%AE%A1%E7%90%86%E5%B9%B3%E5%8F%B0%E6%A0%87%E5%87%86%E7%AD%94%E6%A1%88.js?version=1201736
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    let menu_root;
    function append_link() {
        let auto_grade = document.createElement('li');
        auto_grade.innerText = "自动评价";
        auto_grade.onclick = grade;
        auto_grade.setAttribute('class', 'ant-menu-item');
        menu_root.appendChild(auto_grade);
        let ignore_continue = document.createElement('li');
        ignore_continue.innerText = "忽略并转到下一个";
        ignore_continue.onclick = ignore;
        ignore_continue.setAttribute('class', 'ant-menu-item');
        menu_root.appendChild(ignore_continue);
    }
    function grade() {
        let questions = document.querySelectorAll("[class|='index_subject']");
        questions.forEach((question) => {
            let required = Boolean(question.querySelector('[class|="index_necessary"]'));
            if (!required) return;
            let tmp = question.querySelector("[class|='index_title']").querySelectorAll('p');
            let title = tmp[tmp.length - 1].innerText;
            let standard_answer = standard_answers[title];
            console.log(`[Auto grading] ${title}: ${standard_answer}`);
            if (standard_answer) {
                let options = question.querySelectorAll('[style="width: 100%;"]');
                options.forEach((option) => {
                    let is_standard_answer = (standard_answer.indexOf(option.innerText) >= 0);
                    if (is_standard_answer) {
                        option.firstChild.click();
                    }
                });
            }
        });
    }
    function ignore() {
        let ignore_btn = root_node.querySelector("[class|='TaskDetailsMainContent_normalButton']");
        if (ignore_btn && ignore_btn.parentElement.parentElement.parentElement.getAttribute('aria-hidden') == 'false') {
            ignore_btn.click();
        } else {
            console.log("[Auto grading] 未找到忽略按钮！");
        }
        let tabs = root_node.querySelector("[class='ant-tabs-nav-scroll']");
        if (tabs) {
            tabs = tabs.children[0].children[0];
        } else {
            console.log("[Auto grading] 未找到教师/助教列表！");
            return;
        }
        let flag = false;
        let tab;
        for (tab of tabs.children) {
            if (flag) {
                tab.click();
                break;
            } else if (tab.getAttribute('aria-selected') == 'true') {
                flag = true;
            }
        }
    }
    const root_node = document.getElementById('root');
    const config = { attributes: false, childList: true, subtree: true };
    const callback = function(mutations, observer) {
        menu_root = root_node.querySelector('.ant-menu-root');
        if (menu_root) {
            append_link();
            observer.disconnect();
        }
    }
    const observer = new MutationObserver(callback);
    observer.observe(root_node, config);
})();