<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>积分显示</title>
    <style>
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #a18cd1, #fbc2eb);
            height: 100vh;
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #333;
        }
        .container {
            width: 90%;
            max-width: 800px;
            background: rgba(255, 255, 255, 0.85);
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
            backdrop-filter: blur(8.5px);
            -webkit-backdrop-filter: blur(8.5px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            text-align: center;
        }
        h1 {
            margin-bottom: 30px;
            font-size: 2em;
            color: #ff5722;
        }
        #sortButton {
            padding: 10px 20px;
            font-size: 1em;
            border: none;
            border-radius: 25px;
            background-color: #2196F3;
            color: white;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.2s;
            margin-bottom: 20px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }
        #sortButton:hover {
            background-color: #1e88e5;
            transform: scale(1.05);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 10px;
        }
        th, td {
            padding: 12px 15px;
            border-bottom: 1px solid #ddd;
            font-size: 1em;
        }
        th {
            background-color: #4CAF50;
            color: white;
        }
        tr:hover {
            background-color: #f1f1f1;
        }
        .button-group {
            margin-top: 30px;
            display: flex;
            justify-content: space-between;
            gap: 10px;
        }
        .back-button, .clear-button {
            padding: 10px 20px;
            font-size: 1em;
            border: none;
            border-radius: 25px;
            color: white;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.2s;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }
        .back-button {
            background-color: #2196F3;
        }
        .back-button:hover {
            background-color: #1e88e5;
            transform: scale(1.05);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
        }
        .clear-button {
            background-color: #f44336;
        }
        .clear-button:hover {
            background-color: #e53935;
            transform: scale(1.05);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
        }
        @media (max-width: 600px) {
            th, td {
                padding: 8px 10px;
            }
            #sortButton, .button-group button {
                width: 100%;
                margin: 10px 0;
            }
        }
    </style>
</head>
<body>

    <div class="container">
        <h1>积分显示</h1>
        <button id="sortButton">切换排序 (降序)</button>
        <table>
            <thead>
                <tr>
                    <th>姓名</th>
                    <th>积分</th>
                </tr>
            </thead>
            <tbody id="studentList">
                <!-- 学生积分将在此处显示 -->
            </tbody>
        </table>
        <div class="button-group">
            <button class="back-button" onclick="window.location.href='index.html'">返回主页面</button>
            <button class="clear-button" id="clearButton">清除所有数据</button>
        </div>
    </div>

    <script>
        const studentList = document.getElementById('studentList');
        const sortButton = document.getElementById('sortButton');
        const clearButton = document.getElementById('clearButton');
        let ascending = false;  // 默认降序

        // 预定义学生名单
        const predefinedStudents = [
            { name: '张三', points: 0 },
            { name: '李四', points: 0 },
            { name: '王五', points: 0 },
            { name: '赵六', points: 0 },
        ];

        // 获取所有学生,包括预定义名单
        function getAllStudents() {
            const students = predefinedStudents.map(student => {
                const storedPoints = localStorage.getItem(student.name);
                return {
                    name: student.name,
                    points: storedPoints !== null ? parseInt(storedPoints) : student.points
                };
            });
            return students;
        }

        // 显示学生积分
        function displayStudents() {
            const students = getAllStudents();
            students.sort((a, b) => ascending ? a.points - b.points : b.points - a.points);
            studentList.innerHTML = '';
            students.forEach(student => {
                studentList.innerHTML += `
                    <tr>
                        <td>${student.name}</td>
                        <td>${student.points}</td>
                    </tr>
                `;
            });
        }

        // 切换排序
        sortButton.addEventListener('click', () => {
            ascending = !ascending;
            sortButton.textContent = `切换排序 (${ascending ? '升序' : '降序'})`;
            displayStudents();
        });

        // 清除所有数据
        clearButton.addEventListener('click', () => {
            const confirmation = confirm("确定要清除所有学生数据吗?此操作无法撤销!");
            if (confirmation) {
                localStorage.clear();
                alert("所有数据已清除!");
                displayStudents(); // 重新显示清空后的数据
            }
        });

        // 初次加载时显示学生积分
        displayStudents();
    </script>

</body>
</html>