// ==========================================
// Chat Switchboard - Main Application
// ==========================================

function init() {
    console.log('🔀 Chat Switchboard initializing...');
    
    loadSettings();
    loadChats();
    loadModels();
    initializeEventListeners();
    updateQuickModelSelector();
    renderChatHistory();
    
    console.log('✅ Chat Switchboard ready');
}

function initializeEventListeners() {
    // Settings modal
    document.getElementById('settingsBtn').addEventListener('click', openSettings);
    document.getElementById('configureBtn').addEventListener('click', openSettings);
    document.getElementById('closeModalBtn').addEventListener('click', closeSettings);
    document.getElementById('cancelBtn').addEventListener('click', closeSettings);
    document.getElementById('saveBtn').addEventListener('click', handleSaveSettings);
    document.getElementById('fetchModelsBtn').addEventListener('click', () => fetchModels(true));
    
    // Chat controls
    document.getElementById('newChatBtn').addEventListener('click', newChat);
    document.getElementById('sendBtn').addEventListener('click', sendMessage);
    document.getElementById('stopBtn').addEventListener('click', stopGeneration);
    document.getElementById('regenerateBtn').addEventListener('click', regenerateResponse);
    document.getElementById('toggleSidebarBtn').addEventListener('click', toggleSidebar);
    document.getElementById('quickFetchBtn').addEventListener('click', () => fetchModels(false));
    
    // Quick model selector
    document.getElementById('quickModel').addEventListener('change', function() {
        if (this.value) {
            State.settings.model = this.value;
            saveSettings();
        }
    });
    
    // Export dropdown
    document.getElementById('exportBtn').addEventListener('click', function(e) {
        e.stopPropagation();
        document.getElementById('exportDropdown').classList.toggle('show');
    });
    
    document.addEventListener('click', function() {
        document.getElementById('exportDropdown').classList.remove('show');
    });
    
    // Message input
    const messageInput = document.getElementById('messageInput');
    messageInput.addEventListener('keydown', handleKeyDown);
    messageInput.addEventListener('input', function() {
        this.style.height = 'auto';
        this.style.height = Math.min(this.scrollHeight, 200) + 'px';
    });
    
    // Settings modal model sync
    document.getElementById('model').addEventListener('change', function() {
        if (this.value) document.getElementById('modelCustom').value = '';
    });
    document.getElementById('modelCustom').addEventListener('input', function() {
        if (this.value) document.getElementById('model').value = '';
    });
    
    // Close modal on overlay click
    document.getElementById('settingsModal').addEventListener('click', function(e) {
        if (e.target === this) closeSettings();
    });
    
    // Global keyboard shortcuts
    document.addEventListener('keydown', function(e) {
        if (e.ctrlKey && e.key === ',') {
            e.preventDefault();
            openSettings();
        }
        if (e.ctrlKey && e.key === 'b') {
            e.preventDefault();
            toggleSidebar();
        }
        if (e.key === 'Escape') {
            if (State.isGenerating) {
                stopGeneration();
            } else if (document.getElementById('settingsModal').classList.contains('active')) {
                closeSettings();
            }
        }
    });
}

function handleKeyDown(e) {
    if (e.key === 'Enter' && !e.shiftKey) {
        e.preventDefault();
        sendMessage();
    }
}

function handleSaveSettings() {
    State.settings.apiEndpoint = document.getElementById('apiEndpoint').value.trim();
    State.settings.apiKey = document.getElementById('apiKey').value.trim();
    
    const modelCustom = document.getElementById('modelCustom').value.trim();
    const modelSelect = document.getElementById('model').value;
    State.settings.model = modelCustom || modelSelect || 'gpt-3.5-turbo';
    
    State.settings.stream = document.getElementById('streamResponse').checked;
    State.settings.saveHistory = document.getElementById('saveHistory').checked;
    State.settings.showThinking = document.getElementById('showThinking').checked;
    State.settings.systemPrompt = document.getElementById('systemPrompt').value.trim();
    State.settings.maxTokens = parseInt(document.getElementById('maxTokens').value) || 4096;
    State.settings.temperature = parseFloat(document.getElementById('temperature').value) || 0.7;
    State.settings.topP = parseFloat(document.getElementById('topP').value) || 1;
    State.settings.presencePenalty = parseFloat(document.getElementById('presencePenalty').value) || 0;
    
    saveSettings();
    updateQuickModelSelector();
    closeSettings();
    showToast('✅ Settings saved', 'success');
}

function newChat() {
    State.currentChatId = null;
    document.getElementById('chatMessages').innerHTML = `
        <div class="empty-state">
            <div class="empty-state-icon">
                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z"></path>
                </svg>
            </div>
            <h2>Start a Conversation</h2>
            <p>Type a message below to begin</p>
        </div>
    `;
    document.getElementById('regenerateBtn').style.display = 'none';
    renderChatHistory();
    document.getElementById('messageInput').focus();
}

function loadChat(chatId) {
    const chat = getChat(chatId);
    if (chat) {
        State.currentChatId = chatId;
        if (chat.model) {
            State.settings.model = chat.model;
            updateQuickModelSelector();
        }
        renderMessages(chat.messages);
        renderChatHistory();
        updateRegenerateButton(chat.messages);
    }
}

function handleDeleteChat(chatId, event) {
    event.stopPropagation();
    if (confirm('Delete this chat?')) {
        deleteChat(chatId);
        if (State.currentChatId === chatId) {
            newChat();
        }
        renderChatHistory();
        showToast('🗑️ Chat deleted', 'success');
    }
}

async function sendMessage() {
    const input = document.getElementById('messageInput');
    const message = input.value.trim();
    
    if (!message || State.isGenerating) return;
    
    if (!State.settings.apiEndpoint || !State.settings.apiKey) {
        showToast('⚠️ Configure API settings first', 'warning');
        openSettings();
        return;
    }

    input.value = '';
    input.style.height = 'auto';
    
    let messages = [];
    
    if (State.settings.systemPrompt) {
        messages.push({ role: 'system', content: State.settings.systemPrompt });
    }
    
    if (State.currentChatId) {
        const chat = getChat(State.currentChatId);
        if (chat) messages = [...chat.messages];
    }
    
    messages.push({ 
        role: 'user', 
        content: message,
        timestamp: new Date().toISOString()
    });
    
    if (!State.currentChatId) {
        const title = message.substring(0, 50) + (message.length > 50 ? '...' : '');
        const chat = createChat(title, messages);
        State.currentChatId = chat.id;
    } else {
        updateChat(State.currentChatId, { messages });
    }
    
    renderMessages(messages);
    renderChatHistory();
    
    await sendApiRequest(messages);
}

async function regenerateResponse() {
    if (State.isGenerating || !State.currentChatId) return;
    
    const chat = getChat(State.currentChatId);
    if (!chat || chat.messages.length === 0) return;
    
    // Remove last assistant message(s)
    while (chat.messages.length > 0 && chat.messages[chat.messages.length - 1].role === 'assistant') {
        chat.messages.pop();
    }
    
    if (chat.messages.length === 0) return;
    
    updateChat(State.currentChatId, { messages: chat.messages });
    renderMessages(chat.messages);
    
    await sendApiRequest(chat.messages);
}

// Initialize on DOM ready
document.addEventListener('DOMContentLoaded', init);