// ==UserScript==
// @name         北理工乐学增强
// @namespace    YinTianliang_i
// @version      1.0.2
// @description  增强北理工乐学的功能
// @author       Yin Tianliang
// @include      *//online.bit.edu.cn/*
// @grant        none
// require      https://code.jquery.com/jquery-3.2.1.min.js
// 页面原先就有jquery, 引入jquery似乎会出问题
// @downloadURL none
// ==/UserScript==

/*jshint esversion: 6 */

let Ajax = {
    get: function (url, fn) {
        let obj = new XMLHttpRequest(); // XMLHttpRequest对象用于在后台与服务器交换数据
        obj.open('GET', url, true);
        obj.onreadystatechange = function () {
            if (obj.readyState == 4 && obj.status == 200 || obj.status == 304) { // readyState == 4说明请求已完成
                fn.call(this, obj.responseText); //从服务器获得数据
            }
        };
        obj.send();
    },
    post: function (url, data, fn) { // datat应为'a=a1&b=b1'这种字符串格式，在jq里如果data为对象会自动将对象转成这种字符串格式
        let obj = new XMLHttpRequest();
        obj.open("POST", url, true);
        obj.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); // 添加http头，发送信息至服务器时内容编码类型
        obj.onreadystatechange = function () {
            if (obj.readyState == 4 && (obj.status == 200 || obj.status == 304)) { // 304未修改
                fn.call(this, obj.responseText);
            }
        };
        obj.send(data);
    }
}

let divTemp = (color, text) => {
    return `<div style="color:${color}"><b>${text}</b></div>`;
};

function AddClickBack() {
    let navigation = document.getElementsByClassName('breadcrumb')[0].children;
    let parent_id = navigation[1].firstChild.href.match(/id=(\d+)/)[1];
    let label_list = JSON.parse(localStorage["label_" + parent_id]);

    if (localStorage["label_" + parent_id]) {
        let parent_name = navigation[2].firstChild.textContent;
        let parent_url = `${navigation[1].firstChild.href}#${label_list[parent_name]}`;
        navigation[2].firstChild.innerHTML =
            `<a title="${parent_name}" href="${parent_url}">${parent_name}</a>`;
    }
}

function RefreshLabels(id) {
    let label_list = !localStorage["label_" + id] ? {} : JSON.parse(localStorage["label_" + id]);
    let weekworks = document.getElementsByClassName('section main clearfix');

    for (let week_work of weekworks) {
        let label = week_work.getAttribute('aria-label');
        label_list[label] = week_work.id;
    }

    // 当前作业class不同 单独处理
    let week_work = document.getElementsByClassName('section main clearfix')[0];
    let label = week_work.getAttribute('aria-label');
    label_list[label] = week_work.id;
    localStorage["label_" + id] = JSON.stringify(label_list);
}

function AddMyACCount(id) {
    let table = document.getElementsByClassName('generaltable')[1].children[1];

    if (table.rows[0].cells[0].textContent != '0') { // 判断是否已经增加了一行
        let row = table.insertRow(0);
        row.insertCell(0).textContent = '0';
        row.insertCell(1).textContent = 'Your';
        row.insertCell(2).textContent = JSON.parse(localStorage["AC_" + id]).length;
    } else {
        table.rows[0].cells[2].textContent = JSON.parse(localStorage["AC_" + id]).length;
    }
}

function RefreshACStatus(id) {
    let reg = new RegExp("userloginex|contest_login.php.cid=(\\d+)");
    let matches = location.toString().match(reg);
    let problem_list = document.getElementsByClassName("activity programming modtype_programming");

    for (let problem of problem_list) {
        let problem_id = problem.id.split("-")[1];
        let dstDiv = problem.firstChild.firstChild.firstChild;

        // 有些题目没有没对齐不能忍
        if (dstDiv.className == "mod-indent") {
            dstDiv.className += " mod-indent-1";
        }

        // 待优化
        id_list = !localStorage["AC_" + id] ? [] : JSON.parse(localStorage["AC_" + id]);
        if (id_list.indexOf(problem_id) == -1) {
            Ajax.post(`http://online.bit.edu.cn/moodle/mod/programming/result.php?id=${problem_id}`,
                null, res => {
                    matches = res.match(/未能通过的有 *(\d+)* *个/);
                    if (matches) {
                        if (matches[1] == "0") {
                            id_list = id_list.concat(problem_id);
                            localStorage["AC_" + id] = JSON.stringify(id_list);
                            // 这个post是异步的, 所以只能每一次post完成都刷新一次AC数
                            // 确保AC数正确
                            AddMyACCount(id);
                            dstDiv.innerHTML = divTemp('green', 'AC');
                        } else {
                            dstDiv.innerHTML = divTemp('red', 'WA');
                        }
                    } else if (/当前状态：程序编译失败。/.test(res)) {
                        dstDiv.innerHTML = divTemp('orange', 'CE');
                    } else if (/当前状态：程序已提交，正等待编译。/.test(res)) {
                        dstDiv.innerHTML = divTemp('gray', 'PE');
                    }
                });
        } else {
            dstDiv.innerHTML = divTemp('green', 'AC');
        }
    }
}

if (/course\/view.php\?id=\d+/.test(location.toString())) {
    let id = location.toString().match(/id=(\d+)/)[1]; // 页面id

    // 储存锚点  (似乎放在RefreshACStatus后面会bug)
    RefreshLabels(id);

    // 更新AC状态
    RefreshACStatus(id);

    // 增加 "自己的AC数"
    AddMyACCount(id);
}


// 增加点击日期跳转
if (/mod\/programming\//.test(location.toString())) {
    AddClickBack();
}

// 隐藏 上传文件
if (/programming\/submit.php\?id=\d+/.test(location.toString())) {
    document.getElementsByClassName('fitem fitem_ffilepicker')[0].style = 'display:none'
}

// TODO:获取提交次数
function get_submit_cnt(id) {
    return s.match(/submit="\d+"/).length;
}