{% extends "base.html" %}

{% block title %}{{ article.title }} - 个人博客{% endblock %}

{% block extra_css %}
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github.min.css">
<style>
    :root {
        --primary-blue: #4A90E2;
        --light-blue: #63C2DE;
        --soft-purple: #9B59B6;
        --text-dark: #2C3E50;
        --warm-cream: #FFF9E6;
    }

    /* 文章容器样式 */
    .article-container {
        max-width: 110vh;
        margin: 0 auto;
        background: white;
        border-radius: 20px;
        box-shadow: 0 2px 12px rgba(99, 145, 197, 0.08);
        border: 2px solid var(--light-blue);
        padding: 2.5rem;
    }

    /* 文章头部样式 */
    .article-header {
        margin-bottom: 2.5rem;
        padding-bottom: 1.5rem;
        border-bottom: 1px solid var(--light-blue);
    }

    .article-title {
        font-size: 2.5rem;
        font-weight: 700;
        color: var(--text-dark);
        line-height: 1.3;
        margin-bottom: 1rem;
        background: linear-gradient(135deg, var(--primary-blue), var(--soft-purple));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .article-meta {
        display: flex;
        align-items: center;
        gap: 1.5rem;
        color: #64748B;
    }

    .meta-item {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .meta-item i {
        color: var(--primary-blue);
    }

    /* AI 摘要样式 */
    .article-summary {
        background: var(--warm-cream);
        border-radius: 16px;
        padding: 1.5rem;
        margin: 2rem 0;
        position: relative;
    }

    .summary-label {
        position: absolute;
        top: -12px;
        left: 16px;
        background: var(--primary-blue);
        color: white;
        padding: 0.25rem 1rem;
        border-radius: 20px;
        font-size: 0.875rem;
        font-weight: 500;
    }

    /* 文章内容样式 */
    .article-content {
        line-height: 1.8;
        color: var(--text-dark);
    }

    .markdown-body {
        font-size: 1.1rem;
    }

    .markdown-body h1,
    .markdown-body h2,
    .markdown-body h3 {
        color: var(--primary-blue);
        margin-top: 2em;
        margin-bottom: 1em;
        font-weight: 600;
    }

    .markdown-body p {
        margin-bottom: 1.5em;
    }

    .markdown-body a {
        color: var(--primary-blue);
        text-decoration: none;
        border-bottom: 1px dashed var(--light-blue);
        transition: all 0.3s;
    }

    .markdown-body a:hover {
        border-bottom-style: solid;
        color: var(--soft-purple);
    }

    .markdown-body code {
        background: #F8FAFC;
        padding: 0.2em 0.4em;
        border-radius: 4px;
        font-size: 0.9em;
        color: var(--primary-blue);
    }

    .markdown-body pre {
        background: #F8FAFC;
        border-radius: 12px;
        padding: 1rem;
        overflow-x: auto;
        border: 1px solid var(--light-blue);
    }

    .markdown-body pre code {
        background: none;
        padding: 0;
        color: inherit;
    }

    .markdown-body blockquote {
        border-left: 4px solid var(--light-blue);
        padding: 0.5rem 0 0.5rem 1rem;
        margin: 1.5rem 0;
        color: #64748B;
        background: #F8FAFC;
    }

    .markdown-body img {
        max-width: 100%;
        border-radius: 12px;
        margin: 1.5rem 0;
    }

    /* AI 聊天窗口样式 */
    .chat-toggle {
        position: fixed;
        right: 2rem;
        bottom: 2rem;
        width: 56px;
        height: 56px;
        border-radius: 28px;
        background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
        color: white;
        border: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        box-shadow: 0 4px 12px rgba(99, 145, 197, 0.2);
        transition: all 0.3s;
        z-index: 998;
    }

    .chat-toggle:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 16px rgba(99, 145, 197, 0.3);
    }

    .chat-window {
        position: fixed;
        right: 2rem;
        bottom: 2rem;
        width: 380px;
        height: 600px;
        background: white;
        border-radius: 20px;
        box-shadow: 0 4px 20px rgba(99, 145, 197, 0.15);
        display: flex;
        flex-direction: column;
        transform: scale(0);
        opacity: 0;
        transform-origin: bottom right;
        transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        z-index: 999;
        border: 2px solid var(--light-blue);
    }

    .chat-window.active {
        transform: scale(1);
        opacity: 1;
    }

    .chat-header {
        padding: 1.25rem;
        background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
        color: white;
        border-radius: 20px 20px 0 0;
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }

    .chat-title {
        font-weight: 600;
        flex: 1;
    }

    .chat-close {
        background: none;
        border: none;
        color: white;
        cursor: pointer;
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 16px;
        transition: all 0.3s;
    }

    .chat-close:hover {
        background: rgba(255, 255, 255, 0.2);
    }

    /* Enhanced Chat Messages Styles */
    .chat-messages {
        flex: 1;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        background: #f8f9fa;
    }

    .chat-message {
        max-width: 85%;
        padding: 1rem 1.25rem;
        border-radius: 16px;
        line-height: 1.5;
        animation: messageSlide 0.3s ease;
        word-wrap: break-word;
        overflow-wrap: break-word;
        width: fit-content;
        border: 2px solid var(--light-blue);
        background: white;
        color: var(--text-dark);
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    }

    .chat-message.user {
        margin-left: auto;
        border-radius: 16px 16px 4px 16px;
        background: #f8f9fa;
    }

    .chat-message.assistant {
        margin-right: auto;
        border-radius: 16px 16px 16px 4px;
    }

    .chat-message p {
        margin: 0;
        margin-bottom: 0.75rem;
    }

    .chat-message p:last-child {
        margin-bottom: 0;
    }

    /* Chat Message Content Styling */
    .chat-message pre {
        background: #f1f5f9;
        border-radius: 8px;
        padding: 1rem;
        margin: 0.75rem 0;
        overflow-x: auto;
        border: 1px solid var(--light-blue);
    }

    .chat-message pre code {
        font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
        font-size: 0.9rem;
        line-height: 1.5;
        color: var(--text-dark);
        background: transparent;
        padding: 0;
    }

    .chat-message code {
        background: #f1f5f9;
        padding: 0.2em 0.4em;
        border-radius: 4px;
        font-size: 0.9em;
        color: var(--primary-blue);
        font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    }

    .chat-message .katex-display {
        margin: 0.75rem 0;
        overflow-x: auto;
        padding: 0.5rem 0;
    }

    .chat-message .katex {
        font-size: 1.1em;
    }

    .chat-input-container {
        padding: 1.25rem;
        border-top: 1px solid var(--light-blue);
    }

    .chat-input-wrapper {
        display: flex;
        gap: 0.75rem;
        align-items: flex-end;
    }

    .chat-input {
        flex: 1;
        min-height: 44px;
        max-height: 120px;
        padding: 0.75rem 1rem;
        border: 2px solid var(--light-blue);
        border-radius: 12px;
        resize: none;
        font-size: 1rem;
        line-height: 1.5;
        transition: all 0.3s;
    }

    .chat-input:focus {
        outline: none;
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 3px rgba(99, 145, 197, 0.1);
    }

    .chat-send {
        background: var(--primary-blue);
        color: white;
        width: 44px;
        height: 44px;
        border: none;
        border-radius: 12px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s;
    }

    .chat-send:hover {
        background: var(--light-blue);
        transform: translateY(-2px);
    }

    /* Animations */
    @keyframes messageSlide {
        from {
            opacity: 0;
            transform: translateY(10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Responsive Design */
    @media (max-width: 768px) {
    /* 文章区域移动端优化 */
    .article-container {
        max-width: 60vh;
        padding: 1.25rem;
        border-radius: 12px;
        margin: 1rem;
        border-width: 1px;
    }

    .article-header {
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
    }

    .article-title {
        font-size: 1.75rem;
        line-height: 1.4;
    }

    .article-meta {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .article-summary {
        margin: 1.5rem 0;
        padding: 1.25rem;
    }

    /* 聊天窗口移动端优化 */
    .chat-window {
        position: fixed;
        bottom: 20px;
        width: 65vh;
        height: 90vh;
        left: 0;
        right: 0;
        margin-left: auto;
        margin-right: auto;
        border-radius: 20px 20px 0 0;
        transform-origin: bottom center;
    }

    .chat-messages {
        padding: 1rem;
    }

    .chat-message {
        max-width: 90%;
        padding: 0.875rem 1rem;
        font-size: 0.95rem;
    }

    .chat-message pre {
        margin: 0.5rem 0;
        padding: 0.875rem;
        font-size: 0.85rem;
    }

    .chat-input-wrapper {
        padding: 0.875rem;
    }

    .chat-input {
        min-height: 40px;
        padding: 0.625rem 0.875rem;
        font-size: 0.95rem;
    }

    .chat-send {
        width: 40px;
        height: 40px;
    }

    .chat-toggle {
        right: 1rem;
        bottom: 1rem;
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    /* 触摸设备优化 */
    .chat-message,
    .chat-input,
    .chat-send,
    .chat-toggle {
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }

    /* 提高移动端可读性 */
    .markdown-body {
        font-size: 1rem;
        line-height: 1.6;
    }

    .markdown-body pre {
        -webkit-overflow-scrolling: touch;
    }
        /* 优化键盘弹出时的布局 */
    @media (max-height: 600px) {
        .chat-window {
            height: 85vh;
            width: 65vh;
        }
    }
}
</style>
{% endblock %}

{% block content %}
<!-- 文章内容 -->
<article class="article-container">
    <header class="article-header">
        <h1 class="article-title">{{ article.title }}</h1>
        <div class="article-meta">
            <div class="meta-item">
                <i class="fas fa-calendar"></i>
                <span>{{ article.created_at.strftime('%Y-%m-%d') }}</span>
            </div>
        </div>
    </header>

    {% if article.summary %}
    <div class="article-summary">
        <span class="summary-label">AI 摘要</span>
        <p>{{ article.summary }}</p>
    </div>
    {% endif %}

    <div class="article-content markdown-body">
        {{ article.content|markdown }}
    </div>
</article>

<!-- AI 聊天窗口 -->
<button class="chat-toggle" id="chatToggle">
    <i class="fas fa-robot"></i>
</button>

<div class="chat-window" id="chatWindow">
    <div class="chat-header">
        <i class="fas fa-robot"></i>
        <span class="chat-title">AI 智能助手</span>
        <button class="chat-close" id="chatClose">
            <i class="fas fa-times"></i>
        </button>
    </div>
    <div class="chat-messages" id="chatMessages"></div>
    <div class="chat-input-wrapper">
        <textarea 
            id="chatInput" 
            class="chat-input" 
            placeholder="输入您的问题..."
            rows="1"
        ></textarea>
        <button class="chat-send" onclick="sendMessage()">
            <i class="fas fa-paper-plane"></i>
        </button>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
<script>
    // 初始化文章上下文
    window.articleContext = {
        title: {{ article.title|tojson|safe }},
        content: {{ article.content|tojson|safe }}
    };

    // 配置Marked
    marked.setOptions({
        breaks: true,
        gfm: true
    });

    // 聊天窗口控制
    const chatToggle = document.getElementById('chatToggle');
    const chatWindow = document.getElementById('chatWindow');
    const chatClose = document.getElementById('chatClose');
    const chatInput = document.getElementById('chatInput');
    const chatMessages = document.getElementById('chatMessages');

    // 模型上下文
    const modelContext = `这是一篇关于"${window.articleContext.title}"的文章。文章内容：\n\n${window.articleContext.content}\n\n请基于以上文章内容来回答用户的问题。`;

    // 欢迎消息
    const welcomeMessage = `您好！我是这篇《${window.articleContext.title}》的AI助手。我已经仔细阅读了全文，可以解答您关于文章内容的任何问题，也提供更深入的讨论和见解，从而帮助您更好地理解文章要点
让我们开始对话吧！`;
    
    // 初始化消息数组
    let messages = [{
        role: 'system',
        content: modelContext
    }];

    // 初始化聊天
    function initializeChat() {
        displayMessage('assistant', welcomeMessage);
    }

    // 切换聊天窗口
    function toggleChat() {
        chatWindow.classList.toggle('active');
        if (chatWindow.classList.contains('active')) {
            chatToggle.style.display = 'none';
            chatInput.focus();
            if (chatMessages.children.length === 0) {
                initializeChat();
            }
        } else {
            chatToggle.style.display = 'flex';
        }
    }

    chatToggle.addEventListener('click', toggleChat);
    chatClose.addEventListener('click', toggleChat);

    // 自动调整文本框高度
    chatInput.addEventListener('input', function() {
        this.style.height = 'auto';
        this.style.height = Math.min(this.scrollHeight, 120) + 'px';
    });

    // 发送消息
    async function sendMessage() {
        const messageText = chatInput.value.trim();
        if (!messageText) return;

        const userMessage = {
            role: 'user',
            content: messageText
        };

        // 重置输入框
        chatInput.value = '';
        chatInput.style.height = 'auto';

        // 显示用户消息
        displayMessage('user', messageText);

        try {
            const currentMessages = [...messages, userMessage];
            
            const response = await fetch('/api/chat', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({ messages: currentMessages })
            });

            if (response.ok) {
                const data = await response.json();
                
                // 更新消息历史
                messages.push(userMessage);
                messages.push({
                    role: 'assistant',
                    content: data.response
                });
                
                // 显示AI响应
                displayMessage('assistant', data.response);
            } else {
                throw new Error('Network response was not ok');
            }
        } catch (error) {
            console.error('Error:', error);
            displayMessage('assistant', '抱歉，发生了错误，请稍后再试。');
        }
    }

    // 显示消息
    function displayMessage(role, content) {
        const messageDiv = document.createElement('div');
        messageDiv.className = `chat-message ${role}`;
        
        // 使用marked渲染Markdown内容
        messageDiv.innerHTML = marked.parse(content);
        
        chatMessages.appendChild(messageDiv);
        chatMessages.scrollTop = chatMessages.scrollHeight;
    }

    // 回车发送消息
    chatInput.addEventListener('keypress', function(event) {
        if (event.key === 'Enter' && !event.shiftKey) {
            event.preventDefault();
            sendMessage();
        }
    });

    // 聊天窗口拖动功能
    let isDragging = false;
    let currentX;
    let currentY;
    let initialX;
    let initialY;
    let xOffset = 0;
    let yOffset = 0;

    chatWindow.addEventListener('mousedown', dragStart);
    document.addEventListener('mousemove', drag);
    document.addEventListener('mouseup', dragEnd);

    function dragStart(e) {
        if (e.target.closest('.chat-header') && !e.target.closest('.chat-close')) {
            initialX = e.clientX - xOffset;
            initialY = e.clientY - yOffset;
            isDragging = true;
            chatWindow.style.cursor = 'grabbing';
        }
    }

    function drag(e) {
        if (isDragging) {
            e.preventDefault();
            currentX = e.clientX - initialX;
            currentY = e.clientY - initialY;
            xOffset = currentX;
            yOffset = currentY;
            
            // 确保窗口不会超出视口边界
            const rect = chatWindow.getBoundingClientRect();
            const viewportWidth = window.innerWidth;
            const viewportHeight = window.innerHeight;
            
            // 限制X轴移动
            if (rect.left < 0) {
                currentX -= rect.left;
            }
            if (rect.right > viewportWidth) {
                currentX -= (rect.right - viewportWidth);
            }
            
            // 限制Y轴移动
            if (rect.top < 0) {
                currentY -= rect.top;
            }
            if (rect.bottom > viewportHeight) {
                currentY -= (rect.bottom - viewportHeight);
            }
            
            setTranslate(currentX, currentY, chatWindow);
        }
    }

    function dragEnd() {
        initialX = currentX;
        initialY = currentY;
        isDragging = false;
        chatWindow.style.cursor = 'default';
    }

    function setTranslate(xPos, yPos, el) {
        el.style.transform = `translate(${xPos}px, ${yPos}px)`;
    }
</script>
{% endblock %}