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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="twitter:card" content="player"/>
    <meta name="twitter:site" content=""/>
    <meta name="twitter:player" content="https://broadfield-dev-or-chatbot.static.hf.space/index.html"/>
    <meta name="twitter:player:stream" content="https://broadfield-dev-or-chatbot.static.hf.space/index.html"/>
    <meta name="twitter:player:width" content="100%"/>
    <meta name="twitter:player:height" content="100%"/>    
    <meta property="og:title" content="Single-file HTML Chatbot"/>
    <meta property="og:description" content="Interactive X App"/>
    <meta property="og:image" content="https://huggingface.co/spaces/Space-Share/iLearn/resolve/main/card_im_crop.png"/>  
  
  
  
  
  <title>OpenRouter Chatbot</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.6.0/css/all.min.css">
    <style>
        body { font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
        .user-msg { background: #3b82f6; border-radius: 18px 18px 4px 18px; }
        .assistant-msg { background: #1f2937; border-radius: 18px 18px 18px 4px; }
        .prose { max-width: none; }
        .prose pre { background: #111827; padding: 1rem; border-radius: 8px; overflow-x: auto; }
        .prose code { font-size: 0.9em; background: #374151; padding: 2px 4px; border-radius: 4px; }
    </style>
</head>
<body class="bg-gray-950 text-gray-100 h-screen flex">

    <!-- Sidebar -->
    <div class="w-80 bg-gray-900 border-r border-gray-700 flex flex-col">
        <div class="p-4 border-b border-gray-700">
            <h1 class="text-2xl font-bold flex items-center gap-2">
                <i class="fas fa-robot text-blue-500"></i> OR Chat
            </h1>
        </div>

        <div class="p-4">
            <button onclick="newChat()" 
                    class="w-full bg-blue-600 hover:bg-blue-700 py-3 rounded-2xl font-medium flex items-center justify-center gap-2">
                <i class="fas fa-plus"></i> New Chat
            </button>
        </div>

        <div class="px-4 text-xs uppercase tracking-widest text-gray-500 mb-2">Conversations</div>
        <div id="chatHistory" class="flex-1 overflow-auto px-2 space-y-1"></div>

        <div class="p-4 border-t border-gray-700 space-y-4">
            <div>
                <label class="text-sm block mb-1">OpenRouter API Key</label>
                <input id="apiKey" type="password" class="w-full bg-gray-800 border border-gray-600 rounded-xl px-4 py-2 text-sm" placeholder="disabled for demo" disabled>
                <button onclick="saveApiKey()" class="mt-2 w-full bg-gray-700 hover:bg-gray-600 py-2 rounded-xl text-sm">Save Key</button>
            </div>

            <div>
                <div class="flex justify-between items-center mb-1">
                    <label class="text-sm">Model</label>
                    <button onclick="fetchModels()" class="text-blue-400 hover:text-blue-300 text-xs">
                        <i class="fas fa-sync"></i> Refresh
                    </button>
                </div>
                <select id="modelSelect" onchange="handleModelChange()" 
                        class="w-full bg-gray-800 border border-gray-600 rounded-xl px-4 py-2 text-sm">
                </select>
            </div>

            <div>
                <div class="flex justify-between text-sm mb-2">
                    <span>Tools</span>
                    <button onclick="document.getElementById('toolFileInput').click()" 
                            class="text-violet-400 hover:text-violet-300 text-xs" disabled>+ Load MCP</button>
                </div>
                <input type="file" id="toolFileInput" multiple accept=".json" class="hidden" onchange="handleToolFiles(event)">
                <div id="toolsList" class="text-xs bg-gray-800 rounded-xl p-3 max-h-40 overflow-auto"></div>
            </div>
        </div>
    </div>

    <!-- Main Chat -->
    <div class="flex-1 flex flex-col">
        <div class="h-14 bg-gray-900 border-b border-gray-700 flex items-center px-6 justify-between">
            <div id="currentModelHeader" class="font-medium text-gray-200"></div>
            <div class="flex gap-4 text-gray-400">
                <button onclick="exportChat()" title="Export Chat"><i class="fas fa-download"></i></button>
                <button onclick="deleteCurrentChat()" title="Delete Chat"><i class="fas fa-trash"></i></button>
            </div>
        </div>

        <div id="messages" class="flex-1 overflow-y-auto p-6 space-y-6 bg-gray-950"></div>

        <div class="p-6 bg-gray-900 border-t border-gray-700">
            <div class="flex gap-3">
                <textarea id="userInput" rows="3" 
                    class="flex-1 bg-gray-800 border border-gray-600 rounded-3xl px-5 py-4 focus:outline-none focus:border-blue-500 resize-y"
                    placeholder="Send a message..."></textarea>
                <button onclick="sendMessage()" 
                        class="bg-blue-600 hover:bg-blue-700 w-12 h-12 rounded-3xl flex items-center justify-center self-end">
                    <i class="fas fa-paper-plane"></i>
                </button>
            </div>
        </div>
    </div>

    <div id="toast" class="hidden fixed bottom-6 right-6 bg-gray-800 border border-gray-600 rounded-2xl px-6 py-3 shadow-2xl"></div>

    <script>
        let API_KEY = localStorage.getItem('or_api_key') || '';
        let conversations = JSON.parse(localStorage.getItem('or_conversations') || '[]');
        let currentChatId = null;
        let AVAILABLE_MODELS = [];
        let AVAILABLE_TOOLS = JSON.parse(localStorage.getItem('or_tools') || '[]');

        async function init() {
            document.getElementById('apiKey').value = API_KEY;
            renderChatHistory();
            if (conversations.length === 0) newChat();
            else loadChat(conversations[0].id);
            await fetchModels();
        }

        function saveApiKey() {
            API_KEY = document.getElementById('apiKey').value.trim();
            localStorage.setItem('or_api_key', API_KEY);
            showToast('API Key saved');
        }

        async function fetchModels() {
            if (!API_KEY) return showToast('Enter API Key first');
            try {
                const res = await fetch('https://openrouter.ai/api/v1/models', {
                    headers: { Authorization: `Bearer ${API_KEY}` }
                });
                const data = await res.json();
                AVAILABLE_MODELS = data.data || [];
                
                const select = document.getElementById('modelSelect');
                select.innerHTML = AVAILABLE_MODELS
                    .sort((a,b) => a.name.localeCompare(b.name))
                    .map(m => `<option value="${m.id}">${m.name} (${Math.round((m.context_length||0)/1000)}k)</option>`).join('');
                
                if (currentChatId) {
                    const chat = conversations.find(c => c.id === currentChatId);
                    if (chat?.model) select.value = chat.model;
                }
                updateModelHeader();
            } catch (e) {
                showToast('Failed to load models');
            }
        }

        function handleModelChange() {
            updateModelHeader();
            if (currentChatId) {
                const chat = conversations.find(c => c.id === currentChatId);
                if (chat) chat.model = document.getElementById('modelSelect').value;
                saveConversations();
            }
        }

        function updateModelHeader() {
            const modelId = document.getElementById('modelSelect').value;
            const model = AVAILABLE_MODELS.find(m => m.id === modelId);
            document.getElementById('currentModelHeader').textContent = model ? model.name : modelId || 'No model selected';
        }

        function newChat() {
            const chat = {
                id: 'chat_' + Date.now(),
                title: 'New Chat',
                model: document.getElementById('modelSelect').value || 'openai/gpt-4o-mini',
                messages: [],
                createdAt: new Date().toISOString()
            };
            conversations.unshift(chat);
            saveConversations();
            loadChat(chat.id);
        }

        function loadChat(id) {
            currentChatId = id;
            const chat = conversations.find(c => c.id === id);
            if (!chat) return;
            document.getElementById('modelSelect').value = chat.model || '';
            updateModelHeader();
            renderMessages(chat.messages);
            renderChatHistory();
        }

        function renderChatHistory() {
            const container = document.getElementById('chatHistory');
            container.innerHTML = conversations.map(chat => `
                <div onclick="loadChat('${chat.id}')" 
                     class="px-4 py-3 rounded-2xl cursor-pointer hover:bg-gray-800 ${chat.id === currentChatId ? 'bg-gray-800' : ''}">
                    <div class="line-clamp-1">${chat.title}</div>
                    <div class="text-xs text-gray-500">${new Date(chat.createdAt).toLocaleDateString()}</div>
                </div>
            `).join('');
        }

        function renderMessages(messages) {
            const container = document.getElementById('messages');
            container.innerHTML = messages.map(msg => `
                <div class="flex ${msg.role === 'user' ? 'justify-end' : 'justify-start'}">
                    <div class="${msg.role === 'user' ? 'user-msg text-white' : 'assistant-msg'} max-w-[75%] px-6 py-4 prose prose-invert">
                        ${msg.role === 'user' ? msg.content : marked.parse(msg.content || '')}
                    </div>
                </div>
            `).join('');
            container.scrollTop = container.scrollHeight;
        }

        async function sendMessage() {
            const input = document.getElementById('userInput');
            const text = input.value.trim();
            if (!text || !currentChatId) return;

            const chat = conversations.find(c => c.id === currentChatId);
            chat.messages.push({ role: "user", content: text });
            
            if (chat.messages.length === 2) {
                chat.title = text.slice(0, 40) + (text.length > 40 ? '...' : '');
            }

            input.value = '';
            renderMessages(chat.messages);
            renderChatHistory();

            const model = document.getElementById('modelSelect').value;

            // Create assistant message container for streaming
            const messagesDiv = document.getElementById('messages');
            const assistantWrapper = document.createElement('div');
            assistantWrapper.className = 'flex justify-start';
            assistantWrapper.innerHTML = `
                <div class="assistant-msg max-w-[75%] px-6 py-4 prose prose-invert">
                    <span class="animate-pulse">Thinking...</span>
                </div>
            `;
            messagesDiv.appendChild(assistantWrapper);
            messagesDiv.scrollTop = messagesDiv.scrollHeight;

            let fullResponse = '';

            try {
                const res = await fetch('https://openrouter.ai/api/v1/chat/completions', {
                    method: 'POST',
                    headers: {
                        'Authorization': `Bearer ${API_KEY}`,
                        'Content-Type': 'application/json',
                        'HTTP-Referer': window.location.href,
                        'X-Title': 'OR Chatbot'
                    },
                    body: JSON.stringify({
                        model: model,
                        messages: chat.messages,
                        tools: AVAILABLE_TOOLS.length > 0 ? AVAILABLE_TOOLS : undefined,
                        stream: true
                    })
                });

                const reader = res.body.getReader();
                const decoder = new TextDecoder();

                while (true) {
                    const { done, value } = await reader.read();
                    if (done) break;

                    const chunk = decoder.decode(value);
                    const lines = chunk.split('\n');

                    for (const line of lines) {
                        if (line.startsWith('data: ') && !line.includes('[DONE]')) {
                            try {
                                const json = JSON.parse(line.slice(6));
                                const delta = json.choices[0]?.delta?.content || '';
                                if (delta) {
                                    fullResponse += delta;
                                    assistantWrapper.querySelector('.assistant-msg').innerHTML = marked.parse(fullResponse);
                                    messagesDiv.scrollTop = messagesDiv.scrollHeight;
                                }
                            } catch (e) {}
                        }
                    }
                }

                // Save final message
                chat.messages.push({ role: "assistant", content: fullResponse });
                saveConversations();

            } catch (err) {
                console.error(err);
                showToast('Request failed');
            }
        }

        function saveConversations() {
            localStorage.setItem('or_conversations', JSON.stringify(conversations));
        }

        function deleteCurrentChat() {
            if (!currentChatId || !confirm('Delete this conversation?')) return;
            conversations = conversations.filter(c => c.id !== currentChatId);
            saveConversations();
            currentChatId = null;
            if (conversations.length) loadChat(conversations[0].id);
            else newChat();
        }

        function exportChat() {
            const chat = conversations.find(c => c.id === currentChatId);
            if (!chat) return;
            const dataStr = JSON.stringify(chat, null, 2);
            const dataUri = 'data:application/json;charset=utf-8,' + encodeURIComponent(dataStr);
            const link = document.createElement('a');
            link.href = dataUri;
            link.download = `${chat.title.replace(/[^a-z0-9]/gi, '_')}.json`;
            link.click();
        }

        function handleToolFiles(e) {
            const files = Array.from(e.target.files);
            let added = 0;
            files.forEach(file => {
                const reader = new FileReader();
                reader.onload = (ev) => {
                    try {
                        let tools = JSON.parse(ev.target.result);
                        if (!Array.isArray(tools)) tools = [tools];
                        tools.forEach(tool => {
                            if (tool.type === "function" && !AVAILABLE_TOOLS.some(t => t.function.name === tool.function.name)) {
                                AVAILABLE_TOOLS.push(tool);
                                added++;
                            }
                        });
                        localStorage.setItem('or_tools', JSON.stringify(AVAILABLE_TOOLS));
                        renderTools();
                        showToast(`Added ${added} tool(s)`);
                    } catch (err) {
                        showToast('Invalid tool file');
                    }
                };
                reader.readAsText(file);
            });
        }

        function renderTools() {
            document.getElementById('toolsList').innerHTML = AVAILABLE_TOOLS.map(t => 
                `<div class="bg-gray-700 px-3 py-1.5 rounded-lg">${t.function.name}</div>`
            ).join('');
        }

        function showToast(message) {
            const toast = document.getElementById('toast');
            toast.textContent = message;
            toast.classList.remove('hidden');
            setTimeout(() => toast.classList.add('hidden'), 2500);
        }

        // Enter key support
        document.getElementById('userInput').addEventListener('keydown', e => {
            if (e.key === 'Enter' && !e.shiftKey) {
                e.preventDefault();
                sendMessage();
            }
        });

        window.onload = init;
    </script>
</body>
</html>