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<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
    <title>教育AI助手平台 - 登录</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css">
    <style>
        @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        :root {
            /* 优雅的配色方案 */
            --primary-color: #0f2d49;
            --primary-light: #234a70;
            --secondary-color: #4a6cfd;
            --secondary-light: #7b91ff;
            --tertiary-color: #f7f9fe;
            --success-color: #10b981;
            --success-light: rgba(16, 185, 129, 0.1);
            --warning-color: #f59e0b;
            --warning-light: rgba(245, 158, 11, 0.1);
            --info-color: #0ea5e9;
            --info-light: rgba(14, 165, 233, 0.1);
            --danger-color: #ef4444;
            --danger-light: rgba(239, 68, 68, 0.1);
            --neutral-50: #f9fafb;
            --neutral-100: #f3f4f6;
            --neutral-200: #e5e7eb;
            --neutral-300: #d1d5db;
            --neutral-400: #9ca3af;
            --neutral-500: #6b7280;
            --neutral-600: #4b5563;
            --neutral-700: #374151;
            --neutral-800: #1f2937;
            --neutral-900: #111827;
            
            /* 样式变量 */
            --border-radius-sm: 0.25rem;
            --border-radius: 0.375rem;
            --border-radius-lg: 0.5rem;
            --border-radius-xl: 0.75rem;
            --border-radius-2xl: 1rem;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
            --card-shadow-hover: 0 10px 20px rgba(0, 0, 0, 0.05), 0 6px 6px rgba(0, 0, 0, 0.1);
            --card-shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --transition-base: all 0.2s ease-in-out;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', sans-serif;
        }
        
        /* 基础样式 */
        body {
            font-family: var(--font-family);
            background-color: var(--neutral-50);
            color: var(--neutral-800);
            margin: 0;
            padding: 0;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            color: var(--neutral-900);
        }
        
        .text-gradient {
            background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            color: transparent;
        }
        
        /* 登录容器样式 */
        .login-container {
            width: 100%;
            max-width: 450px;
            padding: 2.5rem;
            background-color: white;
            border-radius: var(--border-radius-xl);
            box-shadow: var(--card-shadow-lg);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        
        .login-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(to right, var(--secondary-color), var(--secondary-light));
            border-radius: 4px 4px 0 0;
        }
        
        .login-header {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        
        .login-header h1 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.01em;
        }
        
        .login-header p {
            color: var(--neutral-600);
            margin-bottom: 0;
            font-size: 0.95rem;
        }
        
        .user-type-switch {
            margin-bottom: 2rem;
        }
        
        .user-type-switch .btn-group {
            width: 100%;
            box-shadow: var(--card-shadow);
            border-radius: var(--border-radius-lg);
            padding: 0.25rem;
            background-color: var(--neutral-100);
        }
        
        .user-type-switch .btn {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0.75rem 1rem;
            font-weight: 500;
            color: var(--neutral-700);
            border-radius: var(--border-radius);
            transition: var(--transition-base);
        }
        
        .user-type-switch .btn:hover {
            color: var(--primary-color);
        }
        
        .user-type-switch .btn.active {
            background: white;
            color: var(--secondary-color);
            box-shadow: var(--card-shadow);
        }
        
        /* 表单样式 */
        .form-floating {
            margin-bottom: 1.25rem;
        }
        
        .form-floating > .form-control {
            padding: 1rem 1rem;
            height: calc(3.5rem + 2px);
            border-radius: var(--border-radius-lg);
            border: 1px solid var(--neutral-200);
            font-size: 0.95rem;
            transition: var(--transition-base);
        }
        
        .form-floating > .form-control:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(74, 108, 253, 0.1);
        }
        
        .form-floating > label {
            padding: 1rem;
            color: var(--neutral-500);
        }
        
        .form-check {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }
        
        .form-check-input {
            width: 1.25em;
            height: 1.25em;
            margin-right: 0.75rem;
            background-color: white;
            border: 1px solid var(--neutral-300);
            border-radius: 0.25em;
            transition: all 0.15s ease-in-out;
        }
        
        .form-check-input:checked {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
        }
        
        .form-check-label {
            color: var(--neutral-700);
            font-size: 0.95rem;
        }
        
        /* 按钮样式 */
        .btn-primary {
            background: linear-gradient(to right, var(--secondary-color), var(--secondary-light));
            border: none;
            width: 100%;
            padding: 0.85rem;
            font-weight: 500;
            border-radius: var(--border-radius-lg);
            transition: var(--transition-base);
        }
        
        .btn-primary:hover, .btn-primary:focus {
            background: linear-gradient(to right, var(--secondary-light), var(--secondary-color));
            box-shadow: 0 4px 10px rgba(74, 108, 253, 0.3);
            transform: translateY(-1px);
        }
        
        .btn-outline-primary {
            color: var(--secondary-color);
            border-color: var(--secondary-color);
            background-color: transparent;
        }
        
        .btn-outline-primary:hover, .btn-outline-primary:focus {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            box-shadow: 0 4px 10px rgba(74, 108, 253, 0.2);
        }
        
        /* 学生说明部分 */
        .student-instructions {
            margin-top: 1.5rem;
            padding: 1.25rem;
            background-color: var(--neutral-50);
            border-radius: var(--border-radius-lg);
            border: 1px solid var(--neutral-200);
            font-size: 0.95rem;
            color: var(--neutral-700);
            transition: var(--transition-smooth);
        }
        
        .student-instructions p {
            margin-bottom: 0.75rem;
        }
        
        .student-instructions p:last-child {
            margin-bottom: 0;
        }
        
        .student-instructions strong {
            color: var(--neutral-900);
        }
        
        /* 页脚样式 */
        .login-footer {
            text-align: center;
            margin-top: 2rem;
            color: var(--neutral-500);
            font-size: 0.85rem;
        }
        
        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(8px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .fade-in {
            opacity: 0;
            animation: fadeIn 0.4s ease-out forwards;
        }
        
        /* 输入组样式 */
        .input-group {
            position: relative;
        }
        
        .input-group .form-control {
            padding-right: 3.5rem;
            border-radius: var(--border-radius-lg);
        }
        
        .input-group .btn {
            position: absolute;
            right: 0;
            top: 0;
            bottom: 0;
            z-index: 5;
            border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
            color: var(--neutral-700);
            background-color: var(--neutral-100);
            border: 1px solid var(--neutral-200);
            border-left: none;
            transition: var(--transition-base);
        }
        
        .input-group .btn:hover, .input-group .btn:focus {
            background-color: var(--neutral-200);
        }
    </style>
</head>
<body>
    <div class="login-container fade-in">
        <div class="login-header">
            <h1>AI助教开发平台</h1>
            <p id="login-subtitle">教师端登录</p>
        </div>
        
        <div class="user-type-switch">
            <div class="btn-group" role="group" id="user-type-buttons">
                <button type="button" class="btn active" id="teacher-button">教师</button>
                <button type="button" class="btn" id="student-button">学生</button>
            </div>
        </div>
        
        <form id="login-form">
            <div class="form-floating">
                <input type="text" class="form-control" id="username" placeholder="用户名" required>
                <label for="username">用户名</label>
            </div>
            
            <div class="form-floating">
                <input type="password" class="form-control" id="password" placeholder="密码" required>
                <label for="password">密码</label>
            </div>
            
            <div class="form-check">
                <input class="form-check-input" type="checkbox" id="remember-me">
                <label class="form-check-label" for="remember-me">
                    记住我
                </label>
            </div>
            
            <div id="student-instructions" class="student-instructions" style="display: none;">
                <p><strong>学生登录说明：</strong></p>
                <p>您也可以直接使用教师分享的链接访问AI助手，无需登录。</p>
                <div class="input-group mt-3">
                    <input type="text" class="form-control" id="access-token" placeholder="输入访问令牌">
                    <button class="btn" type="button" id="access-button">
                        <i class="bi bi-arrow-right"></i>
                    </button>
                </div>
            </div>
            
            <button type="submit" class="btn btn-primary mt-3">
                <i class="bi bi-box-arrow-in-right me-2"></i>登录
            </button>
        </form>
        
        <div class="login-footer">
            © 2025 教育AI助手开发平台 版权所有
        </div>
    </div>
    
    <script>
        // 硬编码用户
        const users = {
            teachers: [
                { username: 'teacher', password: '123456', name: '李志刚' },
                { username: 'admin', password: 'admin123', name: '管理员' }
            ],
            students: [
                { username: 'student1', password: '123456', name: '张三' },
                { username: 'student2', password: '123456', name: '李四' }
            ]
        };
        
        // DOM元素
        const teacherButton = document.getElementById('teacher-button');
        const studentButton = document.getElementById('student-button');
        const loginSubtitle = document.getElementById('login-subtitle');
        const studentInstructions = document.getElementById('student-instructions');
        const loginForm = document.getElementById('login-form');
        const accessButton = document.getElementById('access-button');
        
        // 切换用户类型
        teacherButton.addEventListener('click', function() {
            teacherButton.classList.add('active');
            studentButton.classList.remove('active');
            loginSubtitle.textContent = '教师端登录';
            studentInstructions.style.display = 'none';
        });
        
        studentButton.addEventListener('click', function() {
            studentButton.classList.add('active');
            teacherButton.classList.remove('active');
            loginSubtitle.textContent = '学生端登录';
            studentInstructions.style.display = 'block';
        });
        
        // 处理登录表单提交
        // 处理登录表单提交
loginForm.addEventListener('submit', async function(e) {
    e.preventDefault();
    
    const username = document.getElementById('username').value;
    const password = document.getElementById('password').value;
    const isTeacher = teacherButton.classList.contains('active');
    
    try {
        const response = await fetch('/api/auth/login', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                username: username,
                password: password,
                type: isTeacher ? 'teacher' : 'student'
            })
        });
        
        const data = await response.json();
        
        if (data.success) {
            // 登录成功，重定向到相应页面
            window.location.href = isTeacher ? '/index.html' : '/student_portal.html';
        } else {
            showAlert('用户名或密码错误', 'danger');
        }
    } catch (error) {
        console.error('登录失败:', error);
        showAlert('登录请求失败，请重试', 'danger');
    }
});
        // 处理访问令牌
        accessButton.addEventListener('click', function() {
            const token = document.getElementById('access-token').value.trim();
            
            if (token) {
                // 简单验证令牌格式
                if (token.length >= 32) {
                    // 这里应该向服务器验证令牌有效性，这里简化处理
                    // 直接从URL中提取agent_id (假设格式为: [agent_id]?token=[token])
                    if (token.includes('?token=')) {
                        window.location.href = '/student/' + token;
                    } else {
                        // 假设这是一个纯token，需要输入Agent ID
                        const agentId = prompt('请输入Agent ID');
                        if (agentId) {
                            window.location.href = `/student/${agentId}?token=${token}`;
                        }
                    }
                } else {
                    showAlert('无效的访问令牌格式', 'warning');
                }
            } else {
                showAlert('请输入访问令牌', 'warning');
            }
        });
        
        // 显示提示信息
        function showAlert(message, type) {
            // 移除现有的提示
            const existingAlert = document.querySelector('.alert');
            if (existingAlert) {
                existingAlert.remove();
            }
            
            // 创建新提示
            const alert = document.createElement('div');
            alert.className = `alert alert-${type} fade-in`;
            alert.role = 'alert';
            alert.style.marginBottom = '1.5rem';
            alert.innerHTML = `
                <i class="bi ${type === 'danger' ? 'bi-exclamation-triangle' : 'bi-info-circle'} me-2"></i>
                ${message}
            `;
            
            // 添加到表单上方
            loginForm.insertAdjacentElement('beforebegin', alert);
            
            // 3秒后自动移除
            setTimeout(() => {
                alert.style.opacity = '0';
                setTimeout(() => alert.remove(), 300);
            }, 3000);
        }
        
        // 页面加载时检查是否已经登录
        // window.addEventListener('DOMContentLoaded', function() {
        //     const currentUser = localStorage.getItem('currentUser');
            
        //     if (currentUser) {
        //         const userData = JSON.parse(currentUser);
                
        //         if (userData.type === 'teacher') {
        //             window.location.href = '/index.html';
        //         } else if (userData.type === 'student') {
        //             window.location.href = '/student_portal.html';
        //         }
        //     }
        // });
    </script>
</body>
</html>