// ==UserScript==
// @name         武大综测F2年度计算小工具
// @namespace    whu
// @version      1.2
// @author       game-loader
// @description  计算武大综测F2部分
// @homepage     https://github.com/game-loader
// @match        https://jwgl.whu.edu.cn/cjcx/cjcx_cxDgXscj.html*
// @grant        GM_xmlhttpRequest
// ==/UserScript==

(function() {
    'use strict';

    // 创建小窗口
    var container = document.createElement('div');
    container.style.position = 'fixed';
    container.style.top = '50%';
    container.style.right = '20%';
    container.style.transform = 'translate(50%, -50%)';
    container.style.backgroundColor = '#ffffff';
    container.style.padding = '20px';
    container.style.border = '1px solid #000000';
    container.style.zIndex = '1000';

    // 创建年份下拉框
    var yearSelect = document.createElement('select');
    yearSelect.innerHTML = `
        <option value="2021">2021</option>
        <option value="2022">2022</option>
        <option value="2023">2023</option>
        <option value="2024">2024</option>
    `;
    container.appendChild(yearSelect);

    // 添加距离
    var spacer = document.createElement('div');
    spacer.style.height = '10px';
    container.appendChild(spacer);

    // 创建计算按钮
    var calculateButton = document.createElement('button');
    calculateButton.textContent = '计算综测F2';
    calculateButton.style.backgroundColor = '#5cb3cc';
    calculateButton.style.color = '#ffffff';
    calculateButton.style.border = 'none';
    calculateButton.style.borderRadius = '5px';
    calculateButton.style.padding = '8px 16px';
    calculateButton.style.boxShadow = '0px 2px 4px rgba(0, 0, 0, 0.4)';
    container.appendChild(calculateButton);

    // Create the query elective courses button
    var queryButton = document.createElement('button');
    queryButton.textContent = '查询选修课';
    queryButton.style.backgroundColor = '#5cb3cc';
    queryButton.style.color = '#ffffff';
    queryButton.style.border = 'none';
    queryButton.style.borderRadius = '5px';
    queryButton.style.padding = '8px 16px';
    queryButton.style.boxShadow = '0px 2px 4px rgba(0, 0, 0, 0.4)';
    queryButton.style.marginLeft = '20px'; // Add space between the buttons
    container.appendChild(queryButton);

    // 将小窗口添加到页面中
    document.body.appendChild(container);

    // 设置小窗口样式
    container.style.width = '300px';
    container.style.height = '200px';
    container.style.overflow = 'auto';

    // 获取gnmkdmKey的值
    var gnmkdmKey = document.getElementById('gnmkdmKey').value;

    // 构造请求URL和postData
    var url = 'https://jwgl.whu.edu.cn/cjcx/cjcx_cxXsgrcj.html';
    var params = 'doType=query&gnmkdm=' + encodeURIComponent(gnmkdmKey);


    // 最终请求URL
    var finalUrl = url + '?' + params;

    // Bind click event to the query button
    queryButton.addEventListener('click', function() {
        var postData = 'xnm=' + yearSelect.value + '&xqm=&kcbj=&_search=false&nd=' + Date.now() + '&queryModel.showCount=50&queryModel.currentPage=1&queryModel.sortName=&queryModel.sortOrder=asc&time=0';
        // Perform the same POST request as the calculate button
        // console.log(postData);
        GM_xmlhttpRequest({
            method: 'POST',
            url: finalUrl,
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            data: postData,
            onload: function(response) {
                var responseData = JSON.parse(response.responseText);
                let items = responseData.items;
                // console.log(items);

                // Only consider items where kcxzmc includes "选修"
                var electiveItems = items.filter((item) => {
                    // console.log('item:', items[item]);
                    // console.log('kcxzmc:', items[item] && items[item].kcxzmc);
                    return item && items[item].kcxzmc && items[item].kcxzmc.includes("选修");
                });

                // Display these items in a list with checkboxes
                var electiveList = document.createElement('ul');
                electiveList.style.listStyleType = 'none';
                electiveList.style.border = '1px solid black'; // Add border to the list
                electiveList.style.padding = '10px'; // Add some padding
                electiveList.style.marginTop = '20px'; // Add margin at the top

                electiveItems.forEach(item => {
                    var listItem = document.createElement('li');
                    listItem.style.marginTop = '5px';
                    listItem.style.display = 'flex'; // Use flex layout
                    listItem.style.alignItems = 'center'; // Center-align items vertically

                    var checkbox = document.createElement('input');
                    checkbox.type = 'checkbox';
                    checkbox.value = item.kcmc;
                    checkbox.style.marginRight = '10px'; // Add some space between the checkbox and the label
                    listItem.appendChild(checkbox);

                    var label = document.createElement('label');
                    label.textContent = item.kcmc;
                    listItem.appendChild(label);

                    electiveList.appendChild(listItem);
                });

                // Add the list to the container
                container.appendChild(electiveList);
            }
        });
    });


    // 绑定按钮点击事件
    calculateButton.addEventListener('click', function() {

        let postData = 'xnm=' + yearSelect.value + '&xqm=&kcbj=&_search=false&nd=' + Date.now() + '&queryModel.showCount=70&queryModel.currentPage=1&queryModel.sortName=&queryModel.sortOrder=asc&time=0';
        // 发送POST请求
        GM_xmlhttpRequest({
            method: 'POST',
            url: finalUrl,
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            data: postData,
            onload: function(response) {
                var responseData = JSON.parse(response.responseText);
                let items = responseData.items;
                // console.log(items);

                // 创建变量用于存储必修成绩、选修成绩和必修学分
                var requiredScore = 0;
                var electiveScore = 0;
                var requiredCredits = 0;

                // Get the selected elective courses
                var selectedElectives = Array.from(container.querySelectorAll('input[type="checkbox"]:checked')).map(input => input.value);
                // Iterate through each item in the items array
                for (var i = 0; i < items.length; i++) {
                    var item = items[i];
                    var kcxzmc = item.kcxzmc;
                    var bfzcj = parseFloat(item.bfzcj);
                    var xf = parseFloat(item.xf);

                    if (kcxzmc.includes("必修")) {
                        requiredScore += bfzcj * xf;
                        requiredCredits += xf;
                    } else if (kcxzmc.includes("选修")) {
                        if (selectedElectives.includes(item.kcmc)) {
                            // Treat the selected elective courses as required courses
                            requiredScore += bfzcj * xf;
                            requiredCredits += xf;
                        } else {
                            // Only consider the non-selected elective courses for the elective score
                            electiveScore += bfzcj * xf;
                        }
                    }
                }

                // 计算必修课平均成绩和选修课成绩
                var requiredGrade = requiredScore / requiredCredits;
                var electiveGrade = electiveScore * 0.002;

                // 在窗口中显示结果
                var resultElement = document.createElement('div');
                resultElement.style.marginTop = '10px';
                resultElement.textContent = "必修课： " + requiredGrade.toFixed(3) + "，选修课： " + electiveGrade.toFixed(3)+",总成绩："+(requiredGrade+electiveGrade).toFixed(3);
                container.appendChild(resultElement);
            }})})})();