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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">
    <title>Homework Hero - 家长端</title>
    <link rel="icon" type="image/x-icon" href="/static/favicon.ico">
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://cdn.jsdelivr.net/npm/feather-icons/dist/feather.min.js"></script>
    <script src="https://unpkg.com/feather-icons"></script>
    <script src="https://cdn.jsdelivr.net/npm/qrcode@1.5.3/build/qrcode.min.js"></script>
</head>
<body class="bg-gradient-to-br from-blue-50 to-indigo-100 min-h-screen">
    <!-- Header -->
    <header class="bg-white shadow-sm py-4 px-6 flex justify-between items-center">
        <div class="flex items-center space-x-2">
            <i data-feather="book-open" class="text-indigo-600"></i>
            <h1 class="text-xl font-bold text-gray-800">Homework Hero</h1>
        </div>
        <button id="addChildBtn" class="bg-indigo-600 hover:bg-indigo-700 text-white px-4 py-2 rounded-lg flex items-center">
            <i data-feather="plus" class="mr-1"></i> 添加孩子
        </button>
    </header>

    <!-- Main Content -->
    <main class="container mx-auto px-4 py-8">
        <!-- Children List -->
        <section id="childrenList" class="mb-12">
            <h2 class="text-2xl font-bold text-gray-800 mb-6 flex items-center">
                <i data-feather="users" class="mr-2 text-indigo-600"></i> 我的孩子们
            </h2>
            
            <div id="childrenContainer" class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
                <!-- Child cards will be dynamically added here -->
                <div class="bg-white rounded-xl shadow-md p-6 flex flex-col items-center justify-center border-2 border-dashed border-gray-300">
                    <i data-feather="user-plus" class="text-gray-400 mb-3" style="width: 48px; height: 48px;"></i>
                    <p class="text-gray-500 mb-4">添加第一个孩子开始远程辅导</p>
                    <button id="addChildCardBtn" class="bg-indigo-600 hover:bg-indigo-700 text-white px-4 py-2 rounded-lg flex items-center">
                        <i data-feather="plus" class="mr-1"></i> 添加孩子
                    </button>
                </div>
            </div>
        </section>

        <!-- Active Session Section -->
        <section id="activeSession" class="hidden">
            <h2 class="text-2xl font-bold text-gray-800 mb-6 flex items-center">
                <i data-feather="monitor" class="mr-2 text-indigo-600"></i> 实时辅导会话
            </h2>
            
            <div class="bg-white rounded-xl shadow-md overflow-hidden">
                <div class="p-4 bg-indigo-600 text-white flex justify-between items-center">
                    <h3 id="sessionChildName" class="text-lg font-semibold">正在辅导: 小明</h3>
                    <button id="endSessionBtn" class="bg-red-500 hover:bg-red-600 px-3 py-1 rounded-lg flex items-center">
                        <i data-feather="x" class="mr-1"></i> 结束会话
                    </button>
                </div>
                
                <div class="grid grid-cols-1 lg:grid-cols-2 gap-4 p-4">
                    <!-- Desktop View -->
                    <div class="border rounded-lg overflow-hidden">
                        <div class="bg-gray-800 text-white px-3 py-2 flex items-center">
                            <i data-feather="monitor" class="mr-2"></i>
                            <span>桌面视角</span>
                        </div>
                        <div class="bg-gray-200 h-64 flex items-center justify-center">
                            <img src="http://static.photos/workspace/640x360/123" alt="桌面视角" class="w-full h-full object-cover">
                        </div>
                    </div>
                    
                    <!-- Child Face View -->
                    <div class="border rounded-lg overflow-hidden">
                        <div class="bg-gray-800 text-white px-3 py-2 flex items-center">
                            <i data-feather="camera" class="mr-2"></i>
                            <span>孩子正面</span>
                        </div>
                        <div class="bg-gray-200 h-64 flex items-center justify-center">
                            <img src="http://static.photos/people/640x360/456" alt="孩子正面" class="w-full h-full object-cover">
                        </div>
                    </div>
                </div>
                
                <!-- Help Request -->
                <div class="p-4 border-t">
                    <div class="bg-yellow-50 border-l-4 border-yellow-400 p-4 mb-4">
                        <div class="flex">
                            <div class="flex-shrink-0">
                                <i data-feather="help-circle" class="text-yellow-400"></i>
                            </div>
                            <div class="ml-3">
                                <h3 class="text-sm font-medium text-yellow-800">孩子请求帮助</h3>
                                <div class="mt-2 text-sm text-yellow-700">
                                    <p>小明在数学题上遇到了困难,需要你的帮助。</p>
                                </div>
                                <div class="mt-3 flex space-x-3">
                                    <button class="inline-flex items-center px-3 py-2 border border-transparent text-sm leading-4 font-medium rounded-md shadow-sm text-white bg-indigo-600 hover:bg-indigo-700">
                                        <i data-feather="pen-tool" class="mr-1"></i> 白板讲解
                                    </button>
                                    <button class="inline-flex items-center px-3 py-2 border border-gray-300 text-sm leading-4 font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50">
                                        <i data-feather="cpu" class="mr-1"></i> AI解答
                                    </button>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </section>
    </main>

    <!-- Add Child Modal -->
    <div id="addChildModal" class="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center hidden z-50">
        <div class="bg-white rounded-xl w-11/12 max-w-md p-6">
            <div class="flex justify-between items-center mb-4">
                <h3 class="text-lg font-semibold text-gray-800">添加孩子设备</h3>
                <button id="closeModalBtn" class="text-gray-500 hover:text-gray-700">
                    <i data-feather="x"></i>
                </button>
            </div>
            
            <div class="mb-6">
                <p class="text-gray-600 mb-4">请让孩子打开Homework Hero应用,生成二维码后在此扫描:</p>
                <div id="qrcodeContainer" class="flex justify-center my-4">
                    <div id="qrcode" class="bg-gray-100 p-4 rounded-lg border border-gray-300"></div>
                </div>
                <p class="text-center text-sm text-gray-500 mt-2">扫描此二维码连接到孩子的设备</p>
            </div>
            
            <div class="flex justify-end space-x-3">
                <button id="cancelAddBtn" class="px-4 py-2 border border-gray-300 rounded-lg text-gray-700 hover:bg-gray-50">
                    取消
                </button>
                <button id="simulateScanBtn" class="px-4 py-2 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700">
                    模拟扫描
                </button>
            </div>
        </div>
    </div>

    <script>
        // Initialize Feather Icons
        feather.replace();
        
        // Sample children data
        let children = [
            {
                id: 1,
                name: "小明",
                status: "online",
                lastActive: "刚刚"
            },
            {
                id: 2,
                name: "小红",
                status: "away",
                lastActive: "5分钟前"
            }
        ];
        
        // DOM Elements
        const addChildBtn = document.getElementById('addChildBtn');
        const addChildCardBtn = document.getElementById('addChildCardBtn');
        const addChildModal = document.getElementById('addChildModal');
        const closeModalBtn = document.getElementById('closeModalBtn');
        const cancelAddBtn = document.getElementById('cancelAddBtn');
        const simulateScanBtn = document.getElementById('simulateScanBtn');
        const childrenContainer = document.getElementById('childrenContainer');
        const activeSession = document.getElementById('activeSession');
        const sessionChildName = document.getElementById('sessionChildName');
        const endSessionBtn = document.getElementById('endSessionBtn');
        
        // Generate QR Code
        function generateQRCode() {
            const qrcodeDiv = document.getElementById('qrcode');
            qrcodeDiv.innerHTML = '';
            new QRCode(qrcodeDiv, {
                text: "https://homeworkhero.app/connect/parent/abc123",
                width: 128,
                height: 128,
                colorDark: "#000000",
                colorLight: "#ffffff",
                correctLevel: QRCode.CorrectLevel.H
            });
        }
        
        // Render children list
        function renderChildren() {
            childrenContainer.innerHTML = '';
            
            children.forEach(child => {
                const childCard = document.createElement('div');
                childCard.className = 'bg-white rounded-xl shadow-md overflow-hidden hover:shadow-lg transition-shadow cursor-pointer';
                childCard.innerHTML = `
                    <div class="p-5">
                        <div class="flex justify-between items-start">
                            <div>
                                <h3 class="text-lg font-semibold text-gray-800">${child.name}</h3>
                                <p class="text-sm text-gray-500">最后活跃: ${child.lastActive}</p>
                            </div>
                            <span class="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium ${
                                child.status === 'online' ? 'bg-green-100 text-green-800' : 'bg-yellow-100 text-yellow-800'
                            }">
                                ${child.status === 'online' ? '在线' : '离开'}
                            </span>
                        </div>
                        <div class="mt-4 flex space-x-3">
                            <button class="start-session-btn flex-1 bg-indigo-600 hover:bg-indigo-700 text-white py-2 px-3 rounded-lg text-sm flex items-center justify-center" data-id="${child.id}">
                                <i data-feather="monitor" class="mr-1"></i> 开始辅导
                            </button>
                            <button class="remove-child-btn bg-gray-200 hover:bg-gray-300 text-gray-700 py-2 px-3 rounded-lg">
                                <i data-feather="trash-2"></i>
                            </button>
                        </div>
                    </div>
                `;
                childrenContainer.appendChild(childCard);
            });
            
            // Add empty card if no children
            if (children.length === 0) {
                childrenContainer.innerHTML = `
                    <div class="bg-white rounded-xl shadow-md p-6 flex flex-col items-center justify-center border-2 border-dashed border-gray-300">
                        <i data-feather="user-plus" class="text-gray-400 mb-3" style="width: 48px; height: 48px;"></i>
                        <p class="text-gray-500 mb-4">添加第一个孩子开始远程辅导</p>
                        <button id="addChildCardBtn" class="bg-indigo-600 hover:bg-indigo-700 text-white px-4 py-2 rounded-lg flex items-center">
                            <i data-feather="plus" class="mr-1"></i> 添加孩子
                        </button>
                    </div>
                `;
                document.getElementById('addChildCardBtn').addEventListener('click', () => {
                    addChildModal.classList.remove('hidden');
                    generateQRCode();
                });
            }
            
            // Re-initialize feather icons
            feather.replace();
            
            // Add event listeners
            document.querySelectorAll('.start-session-btn').forEach(btn => {
                btn.addEventListener('click', (e) => {
                    const childId = e.currentTarget.getAttribute('data-id');
                    const child = children.find(c => c.id == childId);
                    startSession(child);
                });
            });
            
            document.querySelectorAll('.remove-child-btn').forEach(btn => {
                btn.addEventListener('click', (e) => {
                    const childCard = e.currentTarget.closest('.rounded-xl');
                    childCard.style.animation = 'fadeOut 0.3s forwards';
                    setTimeout(() => {
                        childCard.remove();
                        // In a real app, you would remove from children array and update state
                    }, 300);
                });
            });
        }
        
        // Start session with child
        function startSession(child) {
            sessionChildName.textContent = `正在辅导: ${child.name}`;
            activeSession.classList.remove('hidden');
            window.scrollTo({
                top: activeSession.offsetTop - 80,
                behavior: 'smooth'
            });
        }
        
        // Event Listeners
        addChildBtn.addEventListener('click', () => {
            addChildModal.classList.remove('hidden');
            generateQRCode();
        });
        
        closeModalBtn.addEventListener('click', () => {
            addChildModal.classList.add('hidden');
        });
        
        cancelAddBtn.addEventListener('click', () => {
            addChildModal.classList.add('hidden');
        });
        
        simulateScanBtn.addEventListener('click', () => {
            // Simulate adding a new child
            const newChild = {
                id: children.length + 1,
                name: `孩子${children.length + 1}`,
                status: "online",
                lastActive: "刚刚"
            };
            children.push(newChild);
            renderChildren();
            addChildModal.classList.add('hidden');
            
            // Show success message
            alert(`成功添加 ${newChild.name}!`);
        });
        
        endSessionBtn.addEventListener('click', () => {
            activeSession.classList.add('hidden');
        });
        
        // Initial render
        renderChildren();
        
        // Add fadeOut animation
        const style = document.createElement('style');
        style.textContent = `
            @keyframes fadeOut {
                from { opacity: 1; transform: translateY(0); }
                to { opacity: 0; transform: translateY(-20px); }
            }
        `;
        document.head.appendChild(style);
    </script>
</body>
</html>