script.js

document.addEventListener('DOMContentLoaded', () => {
    // DOM Elements
    const apiKeyInput = document.getElementById('api-key');
    const toggleKeyBtn = document.getElementById('toggle-key');
    const modelSelect = document.getElementById('model-select');
    const temperatureSlider = document.getElementById('temperature');
    const tempValue = document.getElementById('temp-value');
    const startChatBtn = document.getElementById('start-chat');
    const modelInfo = document.getElementById('model-info');
    const chatContainer = document.getElementById('chat-container');
    const userInput = document.getElementById('user-input');
    const sendBtn = document.getElementById('send-btn');
    const clearChatBtn = document.getElementById('clear-chat');
    const themeToggle = document.getElementById('theme-toggle');
    const themeIcon = document.getElementById('theme-icon');
    // State
    let chatActive = false;
    let conversationHistory = [];
    let models = [];
    let selectedModel = null;
    let embeddedDocument = null;
    let embedApiKey = '';
    let embedModel = null;
    // Initialize
    fetchModels();
    setupEventListeners();
    setupEmbedListeners();
// Functions
    function setupEventListeners() {
        // Toggle API key visibility
        toggleKeyBtn.addEventListener('click', () => {
            const type = apiKeyInput.getAttribute('type') === 'password' ? 'text' : 'password';
            apiKeyInput.setAttribute('type', type);
            feather.replace();
        });

        // Temperature slider
        temperatureSlider.addEventListener('input', () => {
            tempValue.textContent = temperatureSlider.value;
        });

        // Model selection
        modelSelect.addEventListener('change', () => {
            const modelId = modelSelect.value;
            selectedModel = models.find(m => m.id === modelId);
            updateModelInfo();
        });

        // Start chat button
        startChatBtn.addEventListener('click', startChat);

        // Send message
        sendBtn.addEventListener('click', sendMessage);
        userInput.addEventListener('keydown', (e) => {
            if (e.key === 'Enter' && !e.shiftKey) {
                e.preventDefault();
                sendMessage();
            }
        });

        // Clear chat
        clearChatBtn.addEventListener('click', clearChat);

        // Theme toggle
        themeToggle.addEventListener('click', toggleTheme);
    }

    async function fetchModels() {
        try {
            const response = await fetch('https://openrouter.ai/api/v1/models');
            const data = await response.json();
            models = data.data || [];
            populateModelSelect();
        } catch (error) {
            console.error('Error fetching models:', error);
            addSystemMessage('Failed to load models. Please try again later.');
        }
    }

    function populateModelSelect() {
        modelSelect.innerHTML = '<option value="">Select a model...</option>';
        
        models.forEach(model => {
            const option = document.createElement('option');
            option.value = model.id;
            option.textContent = `${model.name} (${model.id})`;
            modelSelect.appendChild(option);
        });
    }

    function updateModelInfo() {
        if (!selectedModel) {
            modelInfo.innerHTML = 'Select a model to see details';
            return;
        }

        modelInfo.innerHTML = `
            <div class="flex items-start justify-between">
                <div>
                    <p class="font-medium text-gray-200">${selectedModel.name}</p>
                    <p class="text-sm text-gray-400">${selectedModel.id}</p>
                </div>
                ${selectedModel.pricing ? `
                    <div class="text-right">
                        <p class="text-xs font-medium text-yellow-300">${(selectedModel.pricing.completion * 1000).toFixed(4)} / 1K tokens</p>
                        <p class="text-xs text-gray-400">${(selectedModel.pricing.prompt * 1000).toFixed(4)} prompt</p>
                    </div>
                ` : ''}
            </div>
            
            <p class="mt-2 text-sm">${selectedModel.description || 'No description available'}</p>
            
            <div class="mt-3 grid grid-cols-2 gap-2 text-xs">
                <div class="bg-gray-700 p-2 rounded">
                    <span class="text-gray-400 block">Provider</span>
                    <span class="font-medium">${selectedModel.provider || 'Unknown'}</span>
                </div>
                <div class="bg-gray-700 p-2 rounded">
                    <span class="text-gray-400 block">Context</span>
                    <span class="font-medium">${selectedModel.context_length ? selectedModel.context_length.toLocaleString() : 'Unknown'} tokens</span>
                </div>
                ${selectedModel.top_provider ? `
                <div class="bg-gray-700 p-2 rounded">
                    <span class="text-gray-400 block">Top Provider</span>
                    <span class="font-medium">${selectedModel.top_provider.name}</span>
                </div>
                ` : ''}
                ${selectedModel.features ? `
                <div class="bg-gray-700 p-2 rounded">
                    <span class="text-gray-400 block">Features</span>
                    <span class="font-medium">${Object.keys(selectedModel.features).filter(k => selectedModel.features[k]).join(', ')}</span>
                </div>
                ` : ''}
            </div>
            
            ${selectedModel.pricing ? `
            <div class="mt-3 bg-gray-700 p-3 rounded-lg">
                <h4 class="text-xs font-medium text-gray-300 mb-1">Pricing Details</h4>
                <div class="text-xs">
                    <p>Prompt: ${(selectedModel.pricing.prompt * 1000).toFixed(4)} / 1K tokens</p>
                    <p>Completion: ${(selectedModel.pricing.completion * 1000).toFixed(4)} / 1K tokens</p>
                    ${selectedModel.pricing.request ? `<p>Request: ${selectedModel.pricing.request} / call</p>` : ''}
                </div>
            </div>
            ` : ''}
`;
    }

    function startChat() {
        const apiKey = apiKeyInput.value.trim();
        const modelId = modelSelect.value;

        if (!apiKey) {
            addSystemMessage('Please enter your OpenRouter API key');
            return;
        }

        if (!modelId) {
            addSystemMessage('Please select a model');
            return;
        }

        chatActive = true;
        conversationHistory = [];
        userInput.disabled = false;
        sendBtn.disabled = false;
        startChatBtn.disabled = true;
        startChatBtn.classList.add('opacity-50', 'cursor-not-allowed');

        addSystemMessage(`Chat started with ${selectedModel.name}. Ready to chat!`);
    }

    async function sendMessage() {
        const message = userInput.value.trim();
        if (!message || !chatActive) return;

        // Add user message to chat
        addMessageToChat('user', message);
        userInput.value = '';
        
        // Show loading indicator
        const loadingId = addLoadingIndicator();

        try {
            const response = await fetch('https://openrouter.ai/api/v1/chat/completions', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'Authorization': `Bearer ${apiKeyInput.value.trim()}`
                },
                body: JSON.stringify({
                    model: selectedModel.id,
                    messages: [
                        ...conversationHistory,
                        { role: 'user', content: message }
                    ],
                    temperature: parseFloat(temperatureSlider.value)
                })
            });

            if (!response.ok) {
                throw new Error(`API error: ${response.status}`);
            }

            const data = await response.json();
            const aiResponse = data.choices[0].message.content;

            // Remove loading indicator and add AI response
            removeLoadingIndicator(loadingId);
            addMessageToChat('assistant', aiResponse);

            // Update conversation history
            conversationHistory.push(
                { role: 'user', content: message },
                { role: 'assistant', content: aiResponse }
            );
        } catch (error) {
            console.error('Error:', error);
            removeLoadingIndicator(loadingId);
            addSystemMessage(`Error: ${error.message}`);
        }
    }

    function addMessageToChat(role, content) {
        const messageDiv = document.createElement('div');
        messageDiv.className = `chat-bubble ${role === 'user' ? 'user-bubble' : 'ai-bubble'} fade-in`;
        messageDiv.textContent = content;
        chatContainer.appendChild(messageDiv);
        chatContainer.scrollTop = chatContainer.scrollHeight;
    }

    function addSystemMessage(content) {
        const messageDiv = document.createElement('div');
        messageDiv.className = 'text-center text-gray-400 text-sm py-2 fade-in';
        messageDiv.textContent = content;
        chatContainer.appendChild(messageDiv);
        chatContainer.scrollTop = chatContainer.scrollHeight;
    }

    function addLoadingIndicator() {
        const id = `loading-${Date.now()}`;
        const loadingDiv = document.createElement('div');
        loadingDiv.id = id;
        loadingDiv.className = 'chat-bubble ai-bubble fade-in';
        
        const dots = document.createElement('div');
        dots.className = 'loading-dots';
        dots.innerHTML = '<span></span><span></span><span></span>';
        
        loadingDiv.appendChild(dots);
        chatContainer.appendChild(loadingDiv);
        chatContainer.scrollTop = chatContainer.scrollHeight;
        
        return id;
    }

    function removeLoadingIndicator(id) {
        const element = document.getElementById(id);
        if (element) {
            element.remove();
        }
    }

    function clearChat() {
        if (!chatActive) return;
        
        conversationHistory = [];
        chatContainer.innerHTML = '';
        addSystemMessage('Chat cleared. Ready for new messages.');
    }
    function setupEmbedListeners() {
        document.addEventListener('process-document', (e) => {
            embeddedDocument = e.detail.content;
            // Here you would typically call your embedding API
            // For demo purposes, we'll just store the content
            addSystemMessage('Document ready for processing! Use commands like:');
            addSystemMessage('"Summarize chapter 3" or "Rewrite paragraph 5 to be more formal"');
        });
    }

    function toggleTheme() {
        const html = document.documentElement;
        html.classList.toggle('dark');
        
        if (html.classList.contains('dark')) {
            themeIcon.setAttribute('data-feather', 'moon');
        } else {
            themeIcon.setAttribute('data-feather', 'sun');
        }
        feather.replace();
    }
});