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<!DOCTYPE html>
<html lang="th">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <title>AI Chatbot - Classic Enhanced</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/atom-one-dark.min.css">
    <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Courier+Prime:wght@400;700&family=Roboto+Mono:wght@300;400&display=swap" rel="stylesheet">

    <style>
        :root {
            --bg-primary: #1a1a1a; /* น้ำตาลเข้ม/ดำ */
            --bg-secondary: #2c2c2c; /* น้ำตาลเข้ม/ดำ (สว่างขึ้น) */
            --bg-tertiary: #3d3d3d; /* น้ำตาลเข้ม/ดำ (สว่างสุด) */
            --text-primary: #f0e6d2; /* ครีม/สว่าง */
            --text-secondary: #a0937d; /* ครีม/น้ำตาล (หม่น) */
            --accent-primary: #33ff99; /* เขียว */
            --accent-secondary: #ff9933; /* ส้ม */
            --accent-tertiary: #8b4513; /* น้ำตาล */
            --chat-bg: #f5f5dc; /* ครีมสำหรับแชท */
            --chat-text: #333333; /* ข้อความเข้มสำหรับแชท */
            --error: #ff4757;
            --success: #2ed573;
            --glass-bg: rgba(44, 44, 44, 0.2); /* ปรับให้โปร่งใสขึ้น */
            --glass-border: rgba(51, 255, 153, 0.2); /* เขียวโปร่ง */
            --shadow-lg: 0 15px 35px rgba(0, 0, 0, 0.5);
            --shadow-xl: 0 20px 45px rgba(0, 0, 0, 0.6);
            --gradient-primary: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            --font-main: 'Roboto Mono', 'Courier Prime', 'Courier New', monospace;
            --font-code: 'Courier Prime', 'Courier New', monospace;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at top left, rgba(51, 255, 153, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at bottom right, rgba(255, 153, 51, 0.06) 0%, transparent 55%);
            color: var(--text-primary);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            overflow: hidden;
            font-weight: 300;
        }

        .app-container {
            width: 95%;
            max-width: 1400px;
            background: var(--glass-bg);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            box-shadow: var(--shadow-xl);
            display: flex;
            overflow: hidden;
            height: 90vh;
            position: relative;
            animation: slideIn 0.8s cubic-bezier(0.23, 1, 0.32, 1);
        }

        @keyframes slideIn {
            from { opacity: 0; transform: translateY(40px) scale(0.97); }
            to { opacity: 1; transform: translateY(0) scale(1); }
        }

        .settings-panel {
            width: 320px;
            padding: 25px;
            background: rgba(30, 30, 30, 0.5);
            backdrop-filter: blur(10px);
            border-right: 1px solid var(--glass-border);
            transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
            overflow-y: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--accent-primary) transparent;
        }
        .settings-panel.collapsed { width: 0; padding: 0; overflow: hidden; border-right: none; }
        .settings-panel::-webkit-scrollbar { width: 6px; }
        .settings-panel::-webkit-scrollbar-track { background: transparent; }
        .settings-panel::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: 3px; }

        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            position: relative;
            background: transparent;
        }

        h2 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            font-weight: 400;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-fill-color: transparent;
            padding-bottom: 5px;
            border-bottom: 1px solid var(--glass-border);
        }

        .form-field { margin-bottom: 20px; }
        .form-field label {
            display: block; margin-bottom: 8px; font-size: 0.9rem;
            font-weight: 400; color: var(--text-secondary);
            text-transform: uppercase; letter-spacing: 0.5px;
        }
        .form-field select, .form-field textarea {
            width: 100%; padding: 12px 16px; border: 1px solid var(--glass-border);
            border-radius: 8px; background: var(--bg-tertiary);
            color: var(--text-primary); font-size: 0.95rem;
            transition: all 0.3s ease; font-family: var(--font-main);
        }
        .form-field select:focus, .form-field textarea:focus {
            outline: none; border-color: var(--accent-primary);
            box-shadow: 0 0 15px var(--accent-primary);
        }
        .form-field textarea { resize: vertical; min-height: 100px; }

        button {
            padding: 12px 24px; border: 1px solid var(--accent-primary);
            border-radius: 8px; background: var(--accent-primary);
            color: var(--bg-primary); cursor: pointer;
            font-size: 1rem; font-weight: 700;
            transition: all 0.3s ease; touch-action: manipulation;
            font-family: var(--font-main);
        }
        button:hover {
            background: transparent; color: var(--accent-primary);
            box-shadow: 0 0 10px var(--accent-primary);
            transform: translateY(-2px);
        }
        button:active { transform: translateY(0px) scale(0.98); }

        .material-icons { font-size: 24px; vertical-align: middle; }

        .chat-container {
            flex: 1; padding: 25px; overflow-y: auto; display: flex;
            flex-direction: column; gap: 16px;
            background: var(--chat-bg); /* Cream Background */
            color: var(--chat-text);
            scrollbar-width: thin; scrollbar-color: var(--accent-secondary) transparent;
        }
        .chat-container::-webkit-scrollbar { width: 8px; }
        .chat-container::-webkit-scrollbar-track { background: transparent; }
        .chat-container::-webkit-scrollbar-thumb { background: var(--accent-secondary); border-radius: 4px; }

        .message {
            max-width: 80%; padding: 16px 20px; border-radius: 15px; /* Softer */
            font-size: 1rem; line-height: 1.6; position: relative;
            animation: messageSlide 0.5s cubic-bezier(0.23, 1, 0.32, 1);
            font-family: 'Segoe UI', Roboto, sans-serif; /* Readable font */
        }
        @keyframes messageSlide {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .message.user {
            background: linear-gradient(135deg, var(--accent-secondary), #ff6b35);
            align-self: flex-end; box-shadow: 0 6px 15px rgba(255, 153, 51, 0.3);
            color: #fff;
        }
        .message.ai {
            background: #ffffff; border: 1px solid #e0e0e0;
            align-self: flex-start; box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
            color: var(--chat-text);
        }
        .message.ai pre {
            background: #1e1e1e; color: #d4d4d4; padding: 20px;
            border-radius: 8px; overflow-x: auto;
            border: 1px solid #333; margin-top: 15px; position: relative;
        }
        .message.ai pre code { font-family: var(--font-code); font-size: 0.9rem; }
        .code-tools {
            position: absolute; top: 10px; right: 10px; display: flex; gap: 8px;
            opacity: 0; transition: opacity 0.3s ease;
        }
        pre:hover .code-tools { opacity: 1; }
        .code-tools button {
            padding: 6px 10px; font-size: 0.8rem; background: #333;
            color: var(--accent-green); border: 1px solid var(--accent-green);
        }
        .code-tools button:hover { background: var(--accent-green); color: #1e1e1e; }

        .input-container {
            display: flex; gap: 12px; padding: 20px;
            background: rgba(30, 30, 30, 0.6); backdrop-filter: blur(10px);
            border-top: 1px solid var(--glass-border); align-items: center;
        }
        #userInput {
            flex: 1; padding: 16px 20px; border: 1px solid var(--glass-border);
            border-radius: 10px; background: var(--bg-secondary);
            color: var(--text-primary); resize: none; min-height: 58px;
            max-height: 150px; font-size: 1rem; transition: all 0.3s ease;
        }
        #userInput:focus {
            outline: none; border-color: var(--accent-primary);
            box-shadow: 0 0 20px var(--accent-primary);
        }

        .input-btn {
            display: flex; align-items: center; justify-content: center;
            width: 58px; height: 58px; border-radius: 50%; /* Round buttons */
            background: var(--bg-tertiary); color: var(--accent-primary);
            transition: all 0.3s ease; padding: 0;
            border: 1px solid var(--accent-primary);
        }
        .input-btn:hover {
            background: var(--accent-primary); color: var(--bg-primary);
            transform: scale(1.05); box-shadow: 0 0 15px var(--accent-primary);
        }
        .input-btn:disabled {
            background: var(--bg-tertiary); cursor: not-allowed;
            transform: none; box-shadow: none; opacity: 0.5;
            border-color: #555; color: #555;
        }
        .spinner {
            width: 26px; height: 26px; border: 3px solid rgba(51, 255, 153, 0.3);
            border-top: 3px solid var(--accent-primary); border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        @keyframes spin { to { transform: rotate(360deg); } }

        .mode-toggle {
            display: flex; background: var(--bg-secondary);
            border-radius: 15px; padding: 4px; position: relative;
            margin: 15px 20px; border: 1px solid var(--glass-border);
        }
        .mode-toggle button {
            flex: 1; padding: 10px 18px; background: none; border: none;
            color: var(--text-secondary); cursor: pointer; z-index: 1;
            font-size: 0.9rem; font-weight: 600; border-radius: 12px;
            transition: color 0.4s ease; box-shadow: none;
        }
        .mode-toggle button.active { color: var(--text-primary); }
        .mode-toggle-slider {
            position: absolute; top: 4px; left: 4px; height: calc(100% - 8px);
            background: var(--gradient-primary); border-radius: 12px;
            transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
            box-shadow: 0 4px 15px rgba(51, 255, 153, 0.3);
            width: calc(50% - 4px); /* Corrected width */
        }

        /* --- Carousel (Original Layout) --- */
        .carousel-container {
            perspective: 1200px; height: 100%; display: flex; flex-direction: column;
            align-items: center; justify-content: center; position: relative;
            user-select: none; padding: 24px; flex: 1; /* Ensure it fills space */
        }
        .carousel {
            position: relative; width: 90%; max-width: 500px; height: 300px;
            transform-style: preserve-3d;
            transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
            cursor: grab;
        }
        .carousel.dragging { cursor: grabbing; }
        .carousel-card {
            position: absolute; width: 100%; height: 100%;
            background: var(--bg-secondary); backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border); border-radius: 16px;
            padding: 24px; box-shadow: 0 10px 25px rgba(0,0,0,0.4);
            display: flex; flex-direction: column; gap: 12px;
            transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
            backface-visibility: hidden;
        }
        .carousel-controls, .carousel-indicator { display: flex; gap: 16px; margin-top: 24px; }
        .carousel-controls button {
            padding: 10px; width: 50px; height: 50px; border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            background: var(--bg-tertiary); color: var(--accent-primary);
            border: 1px solid var(--accent-primary);
        }
        .carousel-controls button:hover { background: var(--accent-primary); color: var(--bg-primary); }
        .carousel-dot {
            width: 14px; height: 14px; background: var(--bg-tertiary);
            border-radius: 50%; cursor: pointer; transition: all 0.3s ease;
            border: 2px solid transparent;
        }
        .carousel-dot.active { background: var(--accent-primary); transform: scale(1.2); }
        .carousel-dot:hover { border-color: var(--accent-primary); }
        #applyPromptBtn { margin-top: 24px; }

        .chip-container {
            display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap;
            padding: 0 24px;
        }
        .chip {
            padding: 10px 18px; background: var(--bg-tertiary);
            border: 1px solid var(--glass-border); border-radius: 20px;
            font-size: 0.85rem; font-weight: 500; cursor: pointer;
            transition: all 0.3s ease; color: var(--text-secondary);
        }
        .chip:hover {
            background: var(--accent-secondary); color: var(--bg-primary);
            transform: translateY(-2px); box-shadow: 0 6px 15px rgba(255, 153, 51, 0.3);
        }

        .floating-buttons {
            position: absolute; top: 20px; right: 20px; display: flex;
            gap: 12px; z-index: 100;
        }
        .floating-btn {
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--bg-secondary); backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border); display: flex;
            align-items: center; justify-content: center;
            transition: all 0.3s ease; padding: 0; color: var(--text-primary);
        }
        .floating-btn:hover {
            background: var(--accent-primary); color: var(--bg-primary);
            transform: scale(1.1); box-shadow: 0 0 15px var(--accent-primary);
        }

        #chatMode { display: none; flex: 1; flex-direction: column; }
        #carouselMode { display: flex; flex: 1; flex-direction: column; }

        @media (max-width: 768px) {
            .app-container { flex-direction: column; height: 100vh; border-radius: 0; }
            .settings-panel { width: 100%; max-height: 40vh; border-right: none; border-bottom: 1px solid var(--glass-border); }
            .settings-panel.collapsed { max-height: 0; }
            .carousel { height: 250px; }
            .floating-buttons { top: 15px; right: 15px; }
        }

    </style>
</head>
<body>
    <div class="app-container" id="appContainer">
        <div class="settings-panel" id="settingsPanel">
            <h2>⚙️ ตั้งค่า</h2>
            <div class="form-field">
                <label>🤖 โมเดลหลัก:</label>
                <select id="modelSelect">
                    <option value="Qwen/Qwen2.5-Coder-32B-Instruct">Qwen2.5-Coder 32B</option>
                    <option value="Qwen/Qwen2-VL-72B-Instruct">Qwen2-VL 72B (Image)</option>
                    <option value="microsoft/Florence-2-large">Florence-2 Large (Image)</option>
                </select>
                <p style="font-size: 0.8rem; color: var(--text-secondary); margin-top: 8px;">
                    💡 เลือกโมเดล (VL/Florence สำหรับรูปภาพ)
                </p>
            </div>
            <div class="form-field">
                <label>👁️ โมเดล OCR:</label>
                <select id="ocrModelSelect">
                    <option value="none">ไม่ใช้</option>
                    <option value="microsoft/trocr-base-printed">TrOCR Base</option>
                </select>
            </div>
            <button id="saveSettingsBtn">💾 บันทึก</button>
        </div>

        <div class="main-content">
            <div class="floating-buttons">
                <button id="settingsToggle" class="floating-btn"><span class="material-icons">settings</span></button>
                <button id="fullscreenToggle" class="floating-btn"><span class="material-icons">fullscreen</span></button>
                <button id="refreshBtn" class="floating-btn"><span class="material-icons">refresh</span></button>
            </div>

            <div class="mode-toggle">
                <button id="carouselModeBtn" class="active">🎛️ Prompt Editor</button>
                <button id="chatModeBtn">💬 แชท</button>
                <div class="mode-toggle-slider" id="modeToggleSlider"></div>
            </div>

            <div id="carouselMode">
                <div class="carousel-container">
                    <div class="carousel" id="promptCarousel">
                        </div>
                    <div class="carousel-controls">
                        <button id="prevCard"><span class="material-icons">chevron_left</span></button>
                        <button id="nextCard"><span class="material-icons">chevron_right</span></button>
                    </div>
                    <div class="carousel-indicator" id="carouselIndicator">
                         </div>
                    <button id="applyPromptBtn">✅ ใช้ Prompt & ไปที่แชท</button>
                </div>
            </div>

            <div id="chatMode">
                <div class="chip-container" id="quickPrompts">
                    <span class="chip" data-prompt="อธิบายโค้ดนี้">🔍 อธิบาย</span>
                    <span class="chip" data-prompt="สร้างฟังก์ชัน">⚡ สร้าง</span>
                    <span class="chip" data-prompt="แก้บั๊ก">🐛 แก้บั๊ก</span>
                    <span class="chip" data-prompt="ปรับปรุง">🚀 ปรับปรุง</span>
                </div>
                <div class="chat-container" id="chatContainer">
                    <div class="message ai">สวัสดี! กลับมาแล้ว พร้อมช่วยเหลือคุณ.</div>
                </div>
                <div class="input-container">
                    <button id="attachButton" class="input-btn"><span class="material-icons">attach_file</span></button>
                    <input type="file" id="fileInput" multiple accept="image/*" style="display: none;">
                    <span id="fileName" style="font-size: 0.8rem; color: var(--accent-primary); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; max-width: 100px;"></span>
                    <textarea id="userInput" placeholder="พิมพ์ข้อความ..."></textarea>
                    <button id="sendButton" class="input-btn"><span class="material-icons">send</span></button>
                </div>
            </div>
             </div>
    </div>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/9.1.6/marked.min.js"></script>
    <script>
        // Set up the Hugging Face API Token
        const HUGGINGFACE_TOKEN = "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";

        let attachedFiles = [];
        let currentCarouselIndex = 0;
        let isLoading = false;
        let carouselElement;

        // Default prompts for the carousel
        const prompts = [
            { id: 'primarySystemPrompt', label: '🎯 Primary System Prompt', value: 'You are a powerful AI assistant that excels at understanding code, images, and technical content. Provide clear, accurate, and helpful responses. Focus on practical solutions and detailed explanations.' },
            { id: 'ocrSystemPrompt', label: '👁️ OCR System Prompt', value: 'Extract all text from the provided image clearly and accurately. Preserve formatting, structure, and layout when possible. If text is unclear, indicate uncertain parts.' },
            { id: 'codeTemplate', label: '💻 Code Template', value: '```javascript\n// Enhanced code implementation\nfunction solution() {\n  // Your optimized code here\n  return result;\n}\n```' },
            { id: 'additionalInstructions', label: '📋 Additional Instructions', value: 'Always provide working, tested code examples. Include error handling and optimization suggestions. Explain complex concepts step by step. Use modern best practices.' },
            { id: 'promptPrefix', label: '🚀 Prompt Prefix', value: 'Please analyze the following request carefully and provide a comprehensive solution:' },
            { id: 'promptSuffix', label: '✨ Prompt Suffix', value: 'Ensure your response is complete, accurate, and includes practical examples where applicable.' }
        ];

        document.addEventListener('DOMContentLoaded', () => {
            carouselElement = document.getElementById('promptCarousel');
            populateCarousel();
            loadSettings();
            setupEventListeners();
            updateCarouselPosition();
            switchMode('carousel'); // Start with carousel
        });

        // Populates the carousel with prompt cards and navigation dots
        function populateCarousel() {
            const carousel = document.getElementById('promptCarousel');
            const indicator = document.getElementById('carouselIndicator');
            carousel.innerHTML = '';
            indicator.innerHTML = '';
            const totalCards = prompts.length;
            const anglePerCard = 360 / totalCards;
            const cardWidth = 500; // Based on max-width
            const translateZ = (cardWidth / 2) / Math.tan((anglePerCard / 2) * (Math.PI / 180));

            prompts.forEach((prompt, index) => {
                const card = document.createElement('div');
                card.className = 'carousel-card';
                const angle = index * anglePerCard;
                card.style.transform = `rotateY(${angle}deg) translateZ(${translateZ}px)`;
                card.innerHTML = `
                    <label>${prompt.label}</label>
                    <textarea id="${prompt.id}" placeholder="Enter prompt...">${localStorage.getItem(prompt.id) || prompt.value}</textarea>
                `;
                carousel.appendChild(card);

                const dot = document.createElement('div');
                dot.className = 'carousel-dot';
                dot.dataset.index = index;
                indicator.appendChild(dot);
            });
             carousel.dataset.translateZ = translateZ; // Store for later use
        }

        // Loads saved settings from local storage
        function loadSettings() {
            document.getElementById('modelSelect').value = localStorage.getItem('selectedModel') || 'Qwen/Qwen2.5-Coder-32B-Instruct';
            document.getElementById('ocrModelSelect').value = localStorage.getItem('selectedOcrModel') || 'none';
            // Prompt values are loaded directly in populateCarousel
        }

        // Saves current settings to local storage
        function saveSettings() {
            localStorage.setItem('selectedModel', document.getElementById('modelSelect').value);
            localStorage.setItem('selectedOcrModel', document.getElementById('ocrModelSelect').value);
            prompts.forEach(p => localStorage.setItem(p.id, document.getElementById(p.id).value));
            showNotification('บันทึกแล้ว!', 'success');
        }

        // Sets up all event listeners for interactive elements
        function setupEventListeners() {
            document.getElementById('carouselModeBtn').addEventListener('click', () => switchMode('carousel'));
            document.getElementById('chatModeBtn').addEventListener('click', () => switchMode('chat'));
            document.getElementById('saveSettingsBtn').addEventListener('click', saveSettings);
            document.getElementById('settingsToggle').addEventListener('click', () => document.getElementById('settingsPanel').classList.toggle('collapsed'));
            document.getElementById('prevCard').addEventListener('click', () => rotateCarousel(-1));
            document.getElementById('nextCard').addEventListener('click', () => rotateCarousel(1));
            document.getElementById('applyPromptBtn').addEventListener('click', applyPromptsAndSwitchToChat);
            document.getElementById('sendButton').addEventListener('click', sendMessage);
            document.getElementById('attachButton').addEventListener('click', () => document.getElementById('fileInput').click());
            document.getElementById('fileInput').addEventListener('change', handleFileSelect);
            document.getElementById('userInput').addEventListener('keydown', handleKeyDown);
            document.getElementById('fullscreenToggle').addEventListener('click', toggleFullscreen);
            document.getElementById('refreshBtn').addEventListener('click', () => location.reload());

            document.querySelectorAll('.chip').forEach(chip => {
                chip.addEventListener('click', (e) => {
                    document.getElementById('userInput').value = e.target.getAttribute('data-prompt');
                    document.getElementById('userInput').focus();
                });
            });
            document.querySelectorAll('.carousel-dot').forEach(dot => {
                dot.addEventListener('click', (e) => goToCarouselIndex(parseInt(e.target.dataset.index)));
            });

            // Basic Touch Swipe for Carousel
            let touchStartX = 0;
            let touchEndX = 0;
            carouselElement.addEventListener('touchstart', e => { touchStartX = e.changedTouches[0].screenX; }, { passive: true });
            carouselElement.addEventListener('touchend', e => {
                touchEndX = e.changedTouches[0].screenX;
                handleSwipe();
            }, { passive: true });

            function handleSwipe() {
                const swipeThreshold = 50; // Minimum distance for a swipe
                if (touchEndX < touchStartX - swipeThreshold) rotateCarousel(1); // Swipe left -> Next
                if (touchEndX > touchStartX + swipeThreshold) rotateCarousel(-1); // Swipe right -> Prev
            }
        }

        // Switches between carousel and chat modes
        function switchMode(mode) {
            const carouselMode = document.getElementById('carouselMode');
            const chatMode = document.getElementById('chatMode');
            const carouselBtn = document.getElementById('carouselModeBtn');
            const chatBtn = document.getElementById('chatModeBtn');
            const slider = document.getElementById('modeToggleSlider');
            const sliderWidth = carouselBtn.offsetWidth; // Get width based on button

            if (mode === 'carousel') {
                carouselMode.style.display = 'flex';
                chatMode.style.display = 'none';
                carouselBtn.classList.add('active');
                chatBtn.classList.remove('active');
                slider.style.width = `${sliderWidth}px`;
                slider.style.left = '4px';
            } else {
                carouselMode.style.display = 'none';
                chatMode.style.display = 'flex';
                carouselBtn.classList.remove('active');
                chatBtn.classList.add('active');
                slider.style.width = `${chatBtn.offsetWidth}px`;
                slider.style.left = `${carouselBtn.offsetLeft + carouselBtn.offsetWidth - chatBtn.offsetWidth + 4}px`;
            }
        }

        // Rotates the carousel by one card in the given direction
        function rotateCarousel(direction) {
            const totalCards = prompts.length;
            currentCarouselIndex = (currentCarouselIndex + direction + totalCards) % totalCards;
            updateCarouselPosition();
        }

        // Jumps to a specific carousel card by index
        function goToCarouselIndex(index) {
            currentCarouselIndex = index;
            updateCarouselPosition();
        }

        // Updates the visual position of the carousel based on currentCarouselIndex
        function updateCarouselPosition() {
            const totalCards = prompts.length;
            const anglePerCard = 360 / totalCards;
            const translateZ = parseFloat(carouselElement.dataset.translateZ || 350);
            const rotationAngle = -currentCarouselIndex * anglePerCard;

            carouselElement.style.transform = `translateZ(-${translateZ}px) rotateY(${rotationAngle}deg)`;

            carouselElement.querySelectorAll('.carousel-card').forEach((card, index) => {
                 card.style.opacity = index === currentCarouselIndex ? '1' : '0.6';
            });

            document.querySelectorAll('.carousel-dot').forEach((dot, index) => {
                dot.classList.toggle('active', index === currentCarouselIndex);
            });
        }

        // Saves prompts and switches to chat mode
        function applyPromptsAndSwitchToChat() {
            saveSettings();
            switchMode('chat');
            showNotification('ใช้ Prompt แล้ว!', 'success');
        }

        // Handles file selection for attachments
        function handleFileSelect(e) {
            attachedFiles = Array.from(e.target.files);
            updateFileDisplay();
        }

        // Updates the displayed file name(s)
        function updateFileDisplay() {
            const fileNameEl = document.getElementById('fileName');
            if (attachedFiles.length === 0) fileNameEl.textContent = '';
            else if (attachedFiles.length === 1) fileNameEl.textContent = attachedFiles[0].name;
            else fileNameEl.textContent = `${attachedFiles.length} ไฟล์`;
        }

        // Handles key presses in the user input field
        function handleKeyDown(e) {
            if (e.key === 'Enter' && !e.shiftKey) {
                e.preventDefault();
                sendMessage();
            }
        }

        // Sends a message to the Hugging Face API
       async function sendMessage() {
            const userInput = document.getElementById('userInput');
            const message = userInput.value.trim();
            if (!message && attachedFiles.length === 0 || isLoading) return; // Prevent sending empty messages or while loading

            setLoading(true);
            const chatContainer = document.getElementById('chatContainer');
            const userMessage = message;
            const currentFiles = [...attachedFiles]; // Snapshot files to send

            userInput.value = ''; // Clear input
            attachedFiles = []; // Clear attached files
            updateFileDisplay();

            if (userMessage) addMessage(userMessage, 'user');
            currentFiles.forEach(file => addImageMessage(URL.createObjectURL(file), 'user')); // Display attached images
            scrollToBottom(chatContainer);

            try {
                const response = await callHuggingFaceAPI(userMessage, currentFiles);
                addMessage(response, 'ai');
            } catch (error) {
                console.error('Error:', error);
                addMessage(`ขออภัย, เกิดข้อผิดพลาด: ${error.message}`, 'ai', true);
                showNotification(`Error: ${error.message}`, 'error');
            } finally {
                setLoading(false);
                scrollToBottom(chatContainer);
            }
        }

        // Calls the Hugging Face Inference API
        async function callHuggingFaceAPI(message, files) {
            const model = document.getElementById('modelSelect').value;
            const ocrModel = document.getElementById('ocrModelSelect').value;
            let fullPrompt = `${localStorage.getItem('primarySystemPrompt')}\n\n${localStorage.getItem('promptPrefix')}\n\nUser: ${message}`;

            if (files.length > 0) {
                const imageData = await Promise.all(files.map(file => {
                    return new Promise((resolve) => {
                        const reader = new FileReader();
                        reader.onloadend = () => resolve(reader.result.split(',')[1]); // Get base64 content
                        reader.readAsDataURL(file);
                    });
                }));

                for (let i = 0; i < imageData.length; i++) {
                    fullPrompt += `\n\nImage:\n<img src="data:${files[i].type};base64,${imageData[i]}"/>`;

                    if (ocrModel !== 'none') {
                        try {
                            const ocrText = await performOCR(files[i], ocrModel);
                            fullPrompt += `\n\n[Image OCR Content: ${ocrText}]`;
                        } catch (ocrError) {
                            console.error(`OCR failed for file ${files[i].name}:`, ocrError);
                            fullPrompt += `\n\n[Image attached, OCR failed for this image]`;
                        }
                    }
                }
            }

            fullPrompt += `\n\n${localStorage.getItem('promptSuffix')}\n\nAI:`;

            // Adjust payload for models that support multi-modal input if necessary.
            // For now, we're encoding images into the prompt itself for simpler integration.
            const payload = {
                inputs: fullPrompt,
                parameters: { max_new_tokens: 2048, temperature: 0.6, top_p: 0.9 }
            };

            const response = await fetch(`https://api-inference.huggingface.co/models/${model}`, {
                method: 'POST',
                headers: { 'Authorization': `Bearer ${HUGGINGFACE_TOKEN}`, 'Content-Type': 'application/json' },
                body: JSON.stringify(payload)
            });

            if (!response.ok) {
                const errorBody = await response.json(); // Attempt to parse JSON error
                throw new Error(`HTTP ${response.status}: ${JSON.stringify(errorBody.error || errorBody)}`);
            }
            const data = await response.json();
            if (data.error) throw new Error(data.error);
            let text = data[0]?.generated_text || 'No response.';
            // Remove the prompt from the generated text, as the API often returns the full input + output
            return text.replace(fullPrompt, '').trim();
        }

        // Performs OCR on an image file using a specified OCR model
        async function performOCR(file, ocrModel) {
            const response = await fetch(`https://api-inference.huggingface.co/models/${ocrModel}`, {
                method: 'POST',
                headers: { 'Authorization': `Bearer ${HUGGINGFACE_TOKEN}` },
                body: file
            });
            if (!response.ok) {
                const errorBody = await response.json();
                throw new Error(`OCR failed: HTTP ${response.status}: ${JSON.stringify(errorBody.error || errorBody)}`);
            }
            const data = await response.json();
            return data[0]?.generated_text || 'Could not extract text.';
        }

        // Adds a text message to the chat display
        function addMessage(content, sender, isError = false) {
            const chatContainer = document.getElementById('chatContainer');
            const messageDiv = document.createElement('div');
            messageDiv.className = `message ${sender}`;
            if (isError) messageDiv.style.border = '1px solid var(--error)';

            if (sender === 'ai') {
                // Use marked.js for Markdown parsing
                messageDiv.innerHTML = marked.parse(content);
                messageDiv.querySelectorAll('pre code').forEach(block => {
                    // Highlight code blocks
                    hljs.highlightElement(block);
                    // Add copy button to code blocks
                    addCodeTools(block.parentElement);
                });
            } else {
                messageDiv.textContent = content;
            }
            chatContainer.appendChild(messageDiv);
        }

        // Adds an image message to the chat display
        function addImageMessage(imageUrl, sender) {
            const chatContainer = document.getElementById('chatContainer');
            const messageDiv = document.createElement('div');
            messageDiv.className = `message ${sender}`;
            messageDiv.innerHTML = `<img src="${imageUrl}" alt="Uploaded" style="max-width: 100%; max-height: 250px; border-radius: 10px;">`;
            chatContainer.appendChild(messageDiv);
        }

        // Adds copy and paste buttons to code blocks
         function addCodeTools(preElement) {
            const toolsDiv = document.createElement('div');
            toolsDiv.className = 'code-tools';
            const copyBtn = document.createElement('button');
            copyBtn.innerHTML = '<span class="material-icons" style="font-size: 16px;">content_copy</span>';
            copyBtn.onclick = () => {
                navigator.clipboard.writeText(preElement.querySelector('code').innerText)
                    .then(() => showNotification('คัดลอกโค้ดแล้ว!', 'success'))
                    .catch(() => showNotification('คัดลอกไม่สำเร็จ!', 'error'));
            };
            toolsDiv.appendChild(copyBtn);
            preElement.appendChild(toolsDiv);
        }

        // Sets the loading state of the UI
        function setLoading(loading) {
            isLoading = loading;
            const sendButton = document.getElementById('sendButton');
            sendButton.innerHTML = loading ? '<div class="spinner"></div>' : '<span class="material-icons">send</span>';
            sendButton.disabled = loading;
        }

        // Toggles fullscreen mode
        function toggleFullscreen() {
            const icon = document.querySelector('#fullscreenToggle .material-icons');
            if (!document.fullscreenElement) {
                document.documentElement.requestFullscreen();
                icon.textContent = 'fullscreen_exit';
            } else {
                document.exitFullscreen();
                icon.textContent = 'fullscreen';
            }
        }

        // Displays a temporary notification (can be enhanced with styled toasts)
        function showNotification(message, type = 'success') {
           // Simple alert for now, can be replaced with a styled div
           console.log(`Notification (${type}): ${message}`);
           // alert(`(${type}) ${message}`); // Uncomment for actual alerts, or implement a proper notification UI
        }

        // Scrolls an element to its bottom
        function scrollToBottom(element) {
            element.scrollTo({ top: element.scrollHeight, behavior: 'smooth' });
        }

    </script>
</body>
</html>