// ===== Server Management Functions =====

async function loadServers() {
  try {
    console.log('🎭 Loading servers...');
    const data = await apiCall('/servers');
    console.log('🎭 Servers response:', data);
    
    if (data.servers) {
      servers = data.servers;
      console.log(`🎭 Loaded ${servers.length} servers:`, servers);
      
      // Debug: Log each server's guild_id
      servers.forEach((server, index) => {
        console.log(`🎭 Server ${index}: guild_id = ${server.guild_id}, name = ${server.guild_name}`);
      });
      
      // Debug: Show raw response data
      console.log('🎭 Raw API response data:', JSON.stringify(data, null, 2));
      
      // Display servers
    displayServers();
      populateServerDropdowns();
      populateMoodDropdowns(); // Populate mood dropdowns after servers are loaded
    } else {
      console.warn('🎭 No servers found in response');
      servers = [];
    }
  } catch (error) {
    console.error('🎭 Failed to load servers:', error);
    servers = [];
  }
}

function displayServers() {
  const container = document.getElementById('servers-list');
  
  if (servers.length === 0) {
    container.innerHTML = '<p>No servers configured</p>';
    return;
  }
  
  container.innerHTML = servers.map(server => `
    <div class="server-card">
      <div class="server-header">
        <div class="server-name">${server.guild_name}</div>
        <div class="server-actions">
          <button onclick="editServer('${String(server.guild_id)}')">Edit</button>
          <button onclick="removeServer('${String(server.guild_id)}')" style="background: #d32f2f;">Remove</button>
        </div>
      </div>
      <div><strong>Guild ID:</strong> ${server.guild_id}</div>
      <div><strong>Autonomous Channel:</strong> #${server.autonomous_channel_name} (${server.autonomous_channel_id})</div>
      <div><strong>Bedtime Channels:</strong> ${server.bedtime_channel_ids.join(', ')}</div>
      <div><strong>Features:</strong> 
        ${server.enabled_features.map(feature => `<span class="feature-tag">${feature}</span>`).join('')}
      </div>
      <div><strong>Autonomous Interval:</strong> ${server.autonomous_interval_minutes} minutes</div>
      <div><strong>Conversation Detection:</strong> ${server.conversation_detection_interval_minutes} minutes</div>
      <div><strong>Bedtime Range:</strong> ${String(server.bedtime_hour || 21).padStart(2, '0')}:${String(server.bedtime_minute || 0).padStart(2, '0')} - ${String(server.bedtime_hour_end || 23).padStart(2, '0')}:${String(server.bedtime_minute_end || 59).padStart(2, '0')}</div>
      
      <!-- Bedtime Configuration -->
      <div style="margin-top: 1rem; padding: 1rem; background: #2a2a2a; border-radius: 4px;">
        <h4 style="margin: 0 0 0.5rem 0; color: #61dafb;">Bedtime Settings</h4>
        <div style="display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-bottom: 0.5rem;">
          <div>
            <label style="display: block; font-size: 0.9rem; margin-bottom: 0.2rem;">Start Time:</label>
            <input type="time" id="bedtime-start-${String(server.guild_id)}" value="${String(server.bedtime_hour || 21).padStart(2, '0')}:${String(server.bedtime_minute || 0).padStart(2, '0')}" style="padding: 0.3rem; background: #333; color: white; border: 1px solid #555; border-radius: 3px; width: 100%;">
          </div>
          <div>
            <label style="display: block; font-size: 0.9rem; margin-bottom: 0.2rem;">End Time:</label>
            <input type="time" id="bedtime-end-${String(server.guild_id)}" value="${String(server.bedtime_hour_end || 23).padStart(2, '0')}:${String(server.bedtime_minute_end || 59).padStart(2, '0')}" style="padding: 0.3rem; background: #333; color: white; border: 1px solid #555; border-radius: 3px; width: 100%;">
          </div>
        </div>
        <button onclick="updateBedtimeRange('${String(server.guild_id)}')" style="background: #4caf50;">Update Bedtime Range</button>
      </div>
      
      <!-- Per-Server Mood Display -->
      <div style="margin-top: 1rem; padding: 1rem; background: #2a2a2a; border-radius: 4px;">
        <h4 style="margin: 0 0 0.5rem 0; color: #61dafb;">Server Mood</h4>
        <div><strong>Current Mood:</strong> ${server.current_mood_name || 'neutral'} ${MOOD_EMOJIS[server.current_mood_name] || ''}</div>
        <div><strong>Sleeping:</strong> ${server.is_sleeping ? 'Yes' : 'No'}</div>
        <div style="margin-top: 0.5rem;">
          <select id="mood-select-${String(server.guild_id)}" style="margin-right: 0.5rem; padding: 0.3rem; background: #333; color: white; border: 1px solid #555; border-radius: 3px;">
            <option value="">Select Mood...</option>
          </select>
          <button onclick="setServerMood('${String(server.guild_id)}')" style="margin-right: 0.5rem;">Change Mood</button>
          <button onclick="resetServerMood('${String(server.guild_id)}')" style="background: #ff9800;">Reset Mood</button>
        </div>
      </div>
    </div>
  `).join('');
  
  // Debug: Log what element IDs were created
  console.log('🎭 Server cards rendered. Checking for mood-select elements:');
  document.querySelectorAll('[id^="mood-select-"]').forEach(el => {
    console.log(`🎭 Found mood-select element: ${el.id}`);
  });
  
  // Populate mood dropdowns after server cards are created
  populateMoodDropdowns();
}

async function populateServerDropdowns() {
  const serverSelect = document.getElementById('server-select');
  const manualServerSelect = document.getElementById('manual-server-select');
  const customPromptServerSelect = document.getElementById('custom-prompt-server-select');
  
  // Clear existing options except "All Servers"
  serverSelect.innerHTML = '<option value="all">All Servers</option>';
  manualServerSelect.innerHTML = '<option value="all">All Servers</option>';
  customPromptServerSelect.innerHTML = '<option value="all">All Servers</option>';
  
  console.log('🎭 Populating server dropdowns with', servers.length, 'servers');
  
  // Add server options
  servers.forEach(server => {
    console.log(`🎭 Adding server to dropdown: ${server.guild_name} (guild_id: ${server.guild_id}, type: ${typeof server.guild_id})`);
    
    const option = document.createElement('option');
    option.value = server.guild_id;
    option.textContent = server.guild_name;
    
    serverSelect.appendChild(option.cloneNode(true));
    manualServerSelect.appendChild(option);
    customPromptServerSelect.appendChild(option.cloneNode(true));
  });
  
  // Debug: Check what's actually in the manual-server-select dropdown
  console.log('🎭 manual-server-select options:');
  Array.from(manualServerSelect.options).forEach((opt, idx) => {
    console.log(`  [${idx}] value="${opt.value}" text="${opt.textContent}"`);
  });
  
  // Populate autonomous stats dropdown
  populateAutonomousServerDropdown();
}

// Figurine subscribers UI functions (must be global for onclick handlers)
async function refreshFigurineSubscribers() {
  try {
    console.log('🔄 Figurines: Fetching subscribers...');
    const data = await apiCall('/figurines/subscribers');
    console.log('📋 Figurines: Received subscribers:', data);
    displayFigurineSubscribers(data.subscribers || []);
    showNotification('Subscribers refreshed');
  } catch (e) {
    console.error('❌ Figurines: Failed to fetch subscribers:', e);
  }
}

function displayFigurineSubscribers(subscribers) {
  const container = document.getElementById('figurine-subscribers-list');
  if (!container) return;
  if (!subscribers.length) {
    container.innerHTML = '<p>No subscribers yet.</p>';
    return;
  }
  let html = '<ul>';
  subscribers.forEach(uid => {
    const uidStr = String(uid);
    html += `<li><code>${uidStr}</code> <button onclick="removeFigurineSubscriber('${uidStr}')">Remove</button></li>`;
  });
  html += '</ul>';
  container.innerHTML = html;
}

async function addFigurineSubscriber() {
  try {
    console.log('➕ Figurines: Adding subscriber...');
    const uid = document.getElementById('figurine-user-id').value.trim();
    if (!uid) { 
      showNotification('Enter a user ID', 'error'); 
      return; 
    }
    const form = new FormData();
    form.append('user_id', uid);
    const res = await fetch('/figurines/subscribers', { method: 'POST', body: form });
    const data = await res.json();
    console.log('➕ Figurines: Add subscriber response:', data);
    if (data.status === 'ok') {
      showNotification('Subscriber added');
      document.getElementById('figurine-user-id').value = '';
      refreshFigurineSubscribers();
    } else {
      showNotification(data.message || 'Failed to add subscriber', 'error');
    }
  } catch (e) {
    console.error('❌ Figurines: Failed to add subscriber:', e);
    showNotification('Failed to add subscriber', 'error');
  }
}

async function removeFigurineSubscriber(uid) {
  try {
    console.log(`🗑️ Figurines: Removing subscriber ${uid}...`);
    const data = await apiCall(`/figurines/subscribers/${uid}`, 'DELETE');
    console.log('🗑️ Figurines: Remove subscriber response:', data);
    if (data.status === 'ok') {
      showNotification('Subscriber removed');
      refreshFigurineSubscribers();
    } else {
      showNotification(data.message || 'Failed to remove subscriber', 'error');
    }
  } catch (e) {
    console.error('❌ Figurines: Failed to remove subscriber:', e);
  }
}

async function sendFigurineNowToAll() {
  try {
    console.log('📨 Figurines: Triggering send to all subscribers...');
    const tweetUrl = document.getElementById('figurine-tweet-url-all').value.trim();
    const statusDiv = document.getElementById('figurine-all-status');
    
    statusDiv.textContent = 'Sending...';
    statusDiv.style.color = evilMode ? '#ff4444' : '#007bff';
    
    const formData = new FormData();
    if (tweetUrl) {
      formData.append('tweet_url', tweetUrl);
    }
    
    const res = await fetch('/figurines/send_now', { 
      method: 'POST', 
      body: formData 
    });
    const data = await res.json();
    
    console.log('📨 Figurines: Send to all response:', data);
    if (data.status === 'ok') {
      showNotification('Figurine DMs queued for all subscribers');
      statusDiv.textContent = 'Queued successfully';
      statusDiv.style.color = '#28a745';
      document.getElementById('figurine-tweet-url-all').value = ''; // Clear input
    } else {
      showNotification(data.message || 'Bot not ready', 'error');
      statusDiv.textContent = 'Failed: ' + (data.message || 'Unknown error');
      statusDiv.style.color = '#dc3545';
    }
  } catch (e) {
    console.error('❌ Figurines: Failed to queue figurine DMs for all:', e);
    showNotification('Failed to queue figurine DMs', 'error');
    document.getElementById('figurine-all-status').textContent = 'Error: ' + e.message;
    document.getElementById('figurine-all-status').style.color = '#dc3545';
  }
}

async function sendFigurineToSingleUser() {
  try {
    const userId = document.getElementById('figurine-single-user-id').value.trim();
    const tweetUrl = document.getElementById('figurine-tweet-url-single').value.trim();
    const statusDiv = document.getElementById('figurine-single-status');
    
    if (!userId) {
      showNotification('Enter a user ID', 'error');
      return;
    }
    
    console.log(`📨 Figurines: Sending to single user ${userId}, tweet: ${tweetUrl || 'random'}`);
    
    statusDiv.textContent = 'Sending...';
    statusDiv.style.color = evilMode ? '#ff4444' : '#007bff';
    
    const formData = new FormData();
    formData.append('user_id', userId);
    if (tweetUrl) {
      formData.append('tweet_url', tweetUrl);
    }
    
    const res = await fetch('/figurines/send_to_user', { 
      method: 'POST', 
      body: formData 
    });
    const data = await res.json();
    
    console.log('📨 Figurines: Send to single user response:', data);
    if (data.status === 'ok') {
      showNotification(`Figurine DM queued for user ${userId}`);
      statusDiv.textContent = 'Queued successfully';
      statusDiv.style.color = '#28a745';
      document.getElementById('figurine-single-user-id').value = ''; // Clear inputs
      document.getElementById('figurine-tweet-url-single').value = '';
    } else {
      showNotification(data.message || 'Failed to queue DM', 'error');
      statusDiv.textContent = 'Failed: ' + (data.message || 'Unknown error');
      statusDiv.style.color = '#dc3545';
    }
  } catch (e) {
    console.error('❌ Figurines: Failed to queue figurine DM for single user:', e);
    showNotification('Failed to queue figurine DM', 'error');
    document.getElementById('figurine-single-status').textContent = 'Error: ' + e.message;
    document.getElementById('figurine-single-status').style.color = '#dc3545';
  }
}

// Keep the old function for backward compatibility
async function sendFigurineNow() {
  return sendFigurineNowToAll();
}

async function addServer() {
  // Don't use parseInt() for Discord IDs - they're too large for JS integers
  const guildId = document.getElementById('new-guild-id').value.trim();
  const guildName = document.getElementById('new-guild-name').value;
  const autonomousChannelId = document.getElementById('new-autonomous-channel-id').value.trim();
  const autonomousChannelName = document.getElementById('new-autonomous-channel-name').value;
  const bedtimeChannelIds = document.getElementById('new-bedtime-channel-ids').value
    .split(',').map(id => id.trim()).filter(id => id.length > 0);
  
  const enabledFeatures = [];
  if (document.getElementById('feature-autonomous').checked) enabledFeatures.push('autonomous');
  if (document.getElementById('feature-bedtime').checked) enabledFeatures.push('bedtime');
  if (document.getElementById('feature-monday-video').checked) enabledFeatures.push('monday_video');
  
  if (!guildId || !guildName || !autonomousChannelId || !autonomousChannelName) {
    showNotification('Please fill in all required fields', 'error');
    return;
  }
  
  try {
    await apiCall('/servers', 'POST', {
      guild_id: guildId,
      guild_name: guildName,
      autonomous_channel_id: autonomousChannelId,
      autonomous_channel_name: autonomousChannelName,
      bedtime_channel_ids: bedtimeChannelIds.length > 0 ? bedtimeChannelIds : [autonomousChannelId],
      enabled_features: enabledFeatures
    });
    
    showNotification('Server added successfully');
    loadServers();
    
    // Clear form
    document.getElementById('new-guild-id').value = '';
    document.getElementById('new-guild-name').value = '';
    document.getElementById('new-autonomous-channel-id').value = '';
    document.getElementById('new-autonomous-channel-name').value = '';
    document.getElementById('new-bedtime-channel-ids').value = '';
  } catch (error) {
    console.error('Failed to add server:', error);
  }
}

async function removeServer(guildId) {
  if (!confirm('Are you sure you want to remove this server?')) {
    return;
  }
  
  try {
    await apiCall(`/servers/${guildId}`, 'DELETE');
    showNotification('Server removed successfully');
    loadServers();
  } catch (error) {
    console.error('Failed to remove server:', error);
  }
}

async function editServer(guildId) {
  // For now, just show a notification - you can implement a full edit form later
  showNotification('Edit functionality coming soon!');
}

async function repairConfig() {
  if (!confirm('This will attempt to repair corrupted server configurations. Are you sure?')) {
    return;
  }
  try {
    await apiCall('/servers/repair', 'POST');
    showNotification('Configuration repair initiated. Please refresh the page to see updated server list.');
    loadServers(); // Reload servers to reflect potential changes
  } catch (error) {
    console.error('Failed to repair config:', error);
    showNotification(error.message || 'Failed to repair configuration', 'error');
  }
}

// Populate mood dropdowns with available moods
async function populateMoodDropdowns() {
  try {
    console.log('🎭 Loading available moods...');
    const data = await apiCall('/moods/available');
    console.log('🎭 Available moods response:', data);
    
    if (data.moods) {
      console.log(`🎭 Found ${data.moods.length} moods:`, data.moods);
      const emojiMap = evilMode ? EVIL_MOOD_EMOJIS : MOOD_EMOJIS;
      
      // Populate the DM mood dropdown (#mood on tab1)
      const dmMoodSelect = document.getElementById('mood');
      if (dmMoodSelect) {
        dmMoodSelect.innerHTML = '';
        data.moods.forEach(mood => {
          const opt = document.createElement('option');
          opt.value = mood;
          opt.textContent = `${emojiMap[mood] || ''} ${mood}`.trim();
          if (mood === 'neutral') opt.selected = true;
          dmMoodSelect.appendChild(opt);
        });
      }

      // Populate the chat mood dropdown (#chat-mood-select on tab7)
      const chatMoodSelect = document.getElementById('chat-mood-select');
      if (chatMoodSelect) {
        chatMoodSelect.innerHTML = '';
        data.moods.forEach(mood => {
          const opt = document.createElement('option');
          opt.value = mood;
          opt.textContent = `${emojiMap[mood] || ''} ${mood}`.trim();
          if (mood === 'neutral') opt.selected = true;
          chatMoodSelect.appendChild(opt);
        });
      }

      // Populate per-server mood dropdowns (mood-select-{guildId})
      document.querySelectorAll('[id^="mood-select-"]').forEach(select => {
        // Keep only the first option ("Select Mood...")
        while (select.children.length > 1) {
          select.removeChild(select.lastChild);
        }
      });
      
      data.moods.forEach(mood => {
        const moodOption = document.createElement('option');
        moodOption.value = mood;
        moodOption.textContent = `${mood} ${emojiMap[mood] || ''}`;
        
        document.querySelectorAll('[id^="mood-select-"]').forEach(select => {
          select.appendChild(moodOption.cloneNode(true));
        });
      });
      
      console.log('🎭 All mood dropdowns populated successfully');
    } else {
      console.warn('🎭 No moods found in response');
    }
  } catch (error) {
    console.error('🎭 Failed to load available moods:', error);
  }
}

// Per-Server Mood Management
async function setServerMood(guildId) {
  console.log(`🎭 setServerMood called with guildId: ${guildId} (type: ${typeof guildId})`);
  
  // Ensure guildId is a string for consistency
  const guildIdStr = String(guildId);
  console.log(`🎭 Using guildId as string: ${guildIdStr}`);
  
  // Debug: Check what elements exist
  const elementId = `mood-select-${guildIdStr}`;
  console.log(`🎭 Looking for element with ID: ${elementId}`);
  
  const moodSelect = document.getElementById(elementId);
  console.log(`🎭 Found element:`, moodSelect);
  
  if (!moodSelect) {
    console.error(`🎭 ERROR: Element with ID '${elementId}' not found!`);
    console.log(`🎭 Available mood-select elements:`, document.querySelectorAll('[id^="mood-select-"]'));
    showNotification(`Error: Mood selector not found for server ${guildIdStr}`, 'error');
    return;
  }
  
  const selectedMood = moodSelect.value;
  
  console.log(`🎭 Setting mood for server ${guildIdStr} to ${selectedMood}`);
  
  if (!selectedMood) {
    showNotification('Please select a mood', 'error');
    return;
  }
  
  // Get the button and store original text before any changes
  const button = moodSelect.nextElementSibling;
  const originalText = button.textContent;
  
  try {
    // Show loading state
    button.textContent = 'Changing...';
    button.disabled = true;
    
    console.log(`🎭 Making API call to /servers/${guildIdStr}/mood with mood: ${selectedMood}`);
    const response = await apiCall(`/servers/${guildIdStr}/mood`, 'POST', { mood: selectedMood });
    console.log(`🎭 API response:`, response);
    
    if (response.status === 'ok') {
      showNotification(`Server mood changed to ${selectedMood} ${MOOD_EMOJIS[selectedMood] || ''}`);
      
      // Reset dropdown selection
      moodSelect.value = '';
      
      // Reload servers to show updated mood
      loadServers();
    } else {
      showNotification(`Failed to change mood: ${response.message}`, 'error');
    }
  } catch (error) {
    console.error(`🎭 Error setting mood:`, error);
    showNotification(`Failed to change mood: ${error}`, 'error');
  } finally {
    // Restore button state
    button.textContent = originalText;
    button.disabled = false;
  }
}

async function resetServerMood(guildId) {
  console.log(`🎭 resetServerMood called with guildId: ${guildId} (type: ${typeof guildId})`);
  
  // Ensure guildId is a string for consistency
  const guildIdStr = String(guildId);
  console.log(`🎭 Using guildId as string: ${guildIdStr}`);
  
  const button = document.querySelector(`button[onclick="resetServerMood('${guildIdStr}')"]`);
  const originalText = button ? button.textContent : 'Reset';
  
  try {
    // Show loading state
    if (button) {
      button.textContent = 'Resetting...';
      button.disabled = true;
    }
    
    await apiCall(`/servers/${guildIdStr}/mood/reset`, 'POST');
    showNotification(`Server mood reset to neutral`);
    
    // Reload servers to show updated mood
    loadServers();
  } catch (error) {
    showNotification(`Failed to reset mood: ${error}`, 'error');
  } finally {
    // Restore button state
    if (button) {
      button.textContent = originalText;
      button.disabled = false;
    }
  }
}

async function updateBedtimeRange(guildId) {
  console.log(`⏰ updateBedtimeRange called with guildId: ${guildId}`);
  
  // Ensure guildId is a string for consistency
  const guildIdStr = String(guildId);
  
  // Get the time values from the inputs
  const startTimeInput = document.getElementById(`bedtime-start-${guildIdStr}`);
  const endTimeInput = document.getElementById(`bedtime-end-${guildIdStr}`);
  
  if (!startTimeInput || !endTimeInput) {
    showNotification('Could not find bedtime time inputs', 'error');
    return;
  }
  
  const startTime = startTimeInput.value; // Format: "HH:MM"
  const endTime = endTimeInput.value; // Format: "HH:MM"
  
  if (!startTime || !endTime) {
    showNotification('Please enter both start and end times', 'error');
    return;
  }
  
  // Parse the times
  const [startHour, startMinute] = startTime.split(':').map(Number);
  const [endHour, endMinute] = endTime.split(':').map(Number);
  
  const button = document.querySelector(`button[onclick="updateBedtimeRange('${guildIdStr}')"]`);
  const originalText = button ? button.textContent : 'Update Bedtime Range';
  
  try {
    // Show loading state
    if (button) {
      button.textContent = 'Updating...';
      button.disabled = true;
    }
    
    // Send the update request
    await apiCall(`/servers/${guildIdStr}/bedtime-range`, 'POST', {
      bedtime_hour: startHour,
      bedtime_minute: startMinute,
      bedtime_hour_end: endHour,
      bedtime_minute_end: endMinute
    });
    
    showNotification(`Bedtime range updated: ${startTime} - ${endTime}`);
    
    // Reload servers to show updated configuration
    loadServers();
    
  } catch (error) {
    console.error('Failed to update bedtime range:', error);
  } finally {
    // Restore button state
    if (button) {
      button.textContent = originalText;
      button.disabled = false;
    }
  }
}

// Mood Management
async function setMood() {
  const mood = document.getElementById('mood').value;
  try {
    // Use different endpoint for evil mode
    const endpoint = evilMode ? '/evil-mode/mood' : '/mood';
    await apiCall(endpoint, 'POST', { mood: mood });
    showNotification(`Mood set to ${mood}`);
    currentMood = mood;
  } catch (error) {
    console.error('Failed to set mood:', error);
  }
}

async function resetMood() {
  try {
    if (evilMode) {
      await apiCall('/evil-mode/mood', 'POST', { mood: 'evil_neutral' });
      showNotification('Evil mood reset to evil_neutral');
      currentMood = 'evil_neutral';
      document.getElementById('mood').value = 'evil_neutral';
    } else {
      await apiCall('/mood/reset', 'POST');
      showNotification('Mood reset to neutral');
      currentMood = 'neutral';
      document.getElementById('mood').value = 'neutral';
    }
  } catch (error) {
    console.error('Failed to reset mood:', error);
  }
}

async function calmMiku() {
  try {
    if (evilMode) {
      await apiCall('/evil-mode/mood', 'POST', { mood: 'evil_neutral' });
      showNotification('Evil Miku has been calmed down');
      currentMood = 'evil_neutral';
      document.getElementById('mood').value = 'evil_neutral';
    } else {
      await apiCall('/mood/calm', 'POST');
      showNotification('Miku has been calmed down');
    }
  } catch (error) {
    console.error('Failed to calm Miku:', error);
  }
}

// ===== Language Mode Functions =====
async function refreshLanguageStatus() {
  try {
    const result = await apiCall('/language');
    document.getElementById('current-language-display').textContent = 
      result.language_mode === 'japanese' ? '日本語 (Japanese)' : 'English';
    document.getElementById('status-language').textContent = 
      result.language_mode === 'japanese' ? '日本語 (Japanese)' : 'English';
    document.getElementById('status-model').textContent = result.current_model;
    
    console.log('Language status:', result);
  } catch (error) {
    console.error('Failed to get language status:', error);
    showNotification('Failed to load language status', 'error');
  }
}

async function toggleLanguageMode() {
  try {
    const result = await apiCall('/language/toggle', 'POST');
    
    // Update UI
    document.getElementById('current-language-display').textContent = 
      result.language_mode === 'japanese' ? '日本語 (Japanese)' : 'English';
    document.getElementById('status-language').textContent = 
      result.language_mode === 'japanese' ? '日本語 (Japanese)' : 'English';
    document.getElementById('status-model').textContent = result.model_now_using;
    
    // Show notification
    showNotification(result.message, 'success');
    console.log('Language toggled:', result);
  } catch (error) {
    console.error('Failed to toggle language mode:', error);
    showNotification('Failed to toggle language mode', 'error');
  }
}