/**
 * Hermes Hub — Client Application & Native Chat Engine
 */

document.addEventListener('DOMContentLoaded', () => {
  // Elements
  const sidebar = document.getElementById('hub-sidebar');
  const btnToggleSidebar = document.getElementById('btn-toggle-sidebar');
  const convSidebar = document.getElementById('hub-conv-sidebar');
  const btnToggleConvSidebar = document.getElementById('btn-toggle-conv-sidebar');
  const btnExpandConvSidebar = document.getElementById('btn-expand-conv-sidebar');
  const universeBtns = document.querySelectorAll('.hub-universe-btn');
  const activeTitle = document.getElementById('active-universe-name');
  const activeScope = document.getElementById('active-universe-scope');
  const activeTagline = document.getElementById('active-universe-tagline');
  const dshModeToggle = document.getElementById('dsh-mode-toggle');
  const tabSession = document.getElementById('tab-session');
  const tabFiles = document.getElementById('tab-files');
  
  // Containers
  const nativeChatLayout = document.getElementById('hub-native-chat');
  const iframeWrapper = document.getElementById('hub-iframe-wrapper');
  const iframe = document.getElementById('workspace-iframe');
  const loader = document.getElementById('hub-loader');
  
  // Native Chat Elements
  const btnNewChat = document.getElementById('btn-new-chat');
  const convSearch = document.getElementById('hub-conv-search');
  const convList = document.getElementById('hub-conv-list');
  const chatHeaderTitle = document.getElementById('current-chat-title');
  const chatHeaderStatus = document.getElementById('current-chat-status');
  const messagesContainer = document.getElementById('hub-messages-container');
  const chatForm = document.getElementById('hub-chat-form');
  const chatInput = document.getElementById('hub-chat-input');
  const btnSend = document.getElementById('btn-send-msg');
  const btnStop = document.getElementById('btn-stop-msg');
  const emptyStateName = document.getElementById('empty-state-name');
  
  const btnPinActive = document.getElementById('btn-pin-active');
  const btnRenameActive = document.getElementById('btn-rename-active');
  const btnDeleteActive = document.getElementById('btn-delete-active');
  
  // Modals
  const personaModal = document.getElementById('persona-modal');
  const cloneModal = document.getElementById('clone-modal');
  const btnEditPersona = document.getElementById('btn-edit-persona');
  const btnCloneUniverse = document.getElementById('btn-clone-universe');
  const btnSavePersona = document.getElementById('btn-save-persona');
  const btnSubmitClone = document.getElementById('btn-submit-clone');

  // Application State
  let currentUniverse = 'tt';
  let currentSessionKey = null;
  let currentConversations = [];
  let isStreaming = false;
  let currentAbortController = null;
  let currentMode = 'chat'; // 'chat' or 'files'

  // Sidebar Collapse Persistence
  const isCollapsed = localStorage.getItem('hermes_hub_sidebar_collapsed') === 'true';
  if (isCollapsed && sidebar) {
    sidebar.classList.add('collapsed');
  }

  if (btnToggleSidebar && sidebar) {
    btnToggleSidebar.addEventListener('click', (e) => {
      e.stopPropagation();
      sidebar.classList.toggle('collapsed');
      localStorage.setItem('hermes_hub_sidebar_collapsed', sidebar.classList.contains('collapsed'));
    });
  }

  // Conversation Sub-Sidebar Collapse Persistence
  const isConvCollapsed = localStorage.getItem('hermes_hub_conv_collapsed') === 'true';
  if (isConvCollapsed && convSidebar) {
    convSidebar.classList.add('collapsed');
    if (btnExpandConvSidebar) btnExpandConvSidebar.style.display = 'inline-flex';
  }

  if (btnToggleConvSidebar && convSidebar) {
    btnToggleConvSidebar.addEventListener('click', (e) => {
      e.stopPropagation();
      convSidebar.classList.add('collapsed');
      if (btnExpandConvSidebar) btnExpandConvSidebar.style.display = 'inline-flex';
      localStorage.setItem('hermes_hub_conv_collapsed', 'true');
    });
  }

  if (btnExpandConvSidebar && convSidebar) {
    btnExpandConvSidebar.addEventListener('click', (e) => {
      e.stopPropagation();
      convSidebar.classList.remove('collapsed');
      btnExpandConvSidebar.style.display = 'none';
      localStorage.setItem('hermes_hub_conv_collapsed', 'false');
    });
  }

  // Accent Mapping
  const ACCENT_MAP = {
    'tt': { accent: 'var(--accent-tt)', glow: 'var(--accent-tt-glow)' },
    'nyora': { accent: 'var(--accent-nyora)', glow: 'var(--accent-nyora-glow)' },
    'perso': { accent: 'var(--accent-perso)', glow: 'var(--accent-perso-glow)' },
    'nabil': { accent: 'var(--accent-nabil)', glow: 'var(--accent-nabil-glow)' },
    'dsh': { accent: 'var(--accent-dsh)', glow: 'var(--accent-dsh-glow)' }
  };

  function updateThemeAccent(universeId) {
    const config = ACCENT_MAP[universeId] || ACCENT_MAP['tt'];
    document.documentElement.style.setProperty('--hub-accent-current', config.accent);
    document.documentElement.style.setProperty('--hub-accent-glow-current', config.glow);
  }

  // Escape HTML helper
  function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text || '';
    return div.innerHTML;
  }

  // Basic Markdown Parser (Code blocks, bold, italic, line breaks)
  function renderMarkdown(text) {
    if (!text) return '';
    let html = escapeHtml(text);
    
    // Code blocks with syntax box
    html = html.replace(/```([a-zA-Z0-9_\-\.]*)\n([\s\S]*?)```/g, (match, lang, code) => {
      return `<pre><code class="language-${lang}">${code}</code></pre>`;
    });
    
    // Inline code
    html = html.replace(/`([^`]+)`/g, '<code>$1</code>');
    
    // Bold
    html = html.replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>');
    
    // Italic
    html = html.replace(/\*([^*]+)\*/g, '<em>$1</em>');
    
    // Line breaks
    html = html.replace(/\n/g, '<br>');
    
    return html;
  }

  // Switch Universe
  function switchUniverse(universeId) {
    currentUniverse = universeId;
    currentSessionKey = null;
    currentMode = 'chat';
    
    // Update active button
    universeBtns.forEach(btn => {
      const isTarget = btn.getAttribute('data-universe') === universeId;
      btn.classList.toggle('active', isTarget);
      if (isTarget) {
        activeTitle.textContent = btn.getAttribute('data-name');
        activeScope.textContent = `Scope: ${btn.getAttribute('data-scope')}`;
        activeTagline.textContent = btn.getAttribute('data-tagline');
        if (emptyStateName) emptyStateName.textContent = btn.getAttribute('data-name');
      }
    });

    updateThemeAccent(universeId);

    // Show/hide DSH Mode Toggle (Exclusif à l'univers DSH)
    if (universeId === 'dsh') {
      if (dshModeToggle) dshModeToggle.style.display = 'inline-flex';
      if (tabSession) tabSession.classList.add('active');
      if (tabFiles) tabFiles.classList.remove('active');
      showIframeView(`https://dsh-hub.yesminedor.tn/`);
    } else {
      if (dshModeToggle) dshModeToggle.style.display = 'none';
      showNativeChatView();
      loadConversations();
    }
  }

  // Iframe Recovery Elements
  const iframeExternalBtn = document.getElementById('btn-iframe-external');
  const iframeReloadBtn = document.getElementById('btn-iframe-reload');
  const iframeTargetLabel = document.getElementById('hub-iframe-target-label');
  const iframeAuthNotice = document.getElementById('hub-iframe-auth-notice');
  const btnAuthNoticeOpen = document.getElementById('btn-auth-notice-open');
  const btnAuthNoticeReload = document.getElementById('btn-auth-notice-reload');
  const btnAuthNoticeDismiss = document.getElementById('btn-auth-notice-dismiss');

  let currentIframeUrl = '';
  let iframeLoadTimeout = null;

  function showNativeChatView() {
    nativeChatLayout.style.display = 'flex';
    iframeWrapper.style.display = 'none';
    if (iframeLoadTimeout) clearTimeout(iframeLoadTimeout);
    if (iframeAuthNotice) iframeAuthNotice.style.display = 'none';
    if (iframe) iframe.src = 'about:blank';
  }

  function showIframeView(url) {
    nativeChatLayout.style.display = 'none';
    iframeWrapper.style.display = 'flex';
    currentIframeUrl = url;

    const isFiles = url.includes('files-hub');
    if (iframeTargetLabel) {
      iframeTargetLabel.textContent = isFiles 
        ? 'Explorateur de Fichiers (files-hub.yesminedor.tn)' 
        : 'Dialogue DeepSeek Harness (dsh-hub.yesminedor.tn)';
    }

    if (iframeExternalBtn) iframeExternalBtn.href = url;
    if (btnAuthNoticeOpen) btnAuthNoticeOpen.href = url;
    if (iframeAuthNotice) iframeAuthNotice.style.display = 'none';

    if (loader) loader.classList.remove('hidden');

    if (iframeLoadTimeout) clearTimeout(iframeLoadTimeout);
    iframeLoadTimeout = setTimeout(() => {
      if (loader) loader.classList.add('hidden');
      if (iframeAuthNotice) iframeAuthNotice.style.display = 'block';
    }, 4500);

    if (iframe) {
      iframe.src = url;
      iframe.onload = () => {
        if (iframeLoadTimeout) {
          clearTimeout(iframeLoadTimeout);
          iframeLoadTimeout = null;
        }
        if (loader) loader.classList.add('hidden');
        try {
          if (iframe.contentDocument && iframe.contentDocument.title.toLowerCase().includes('cloudflare')) {
            if (iframeAuthNotice) iframeAuthNotice.style.display = 'block';
          }
        } catch (e) {
          // Cross-origin restriction (expected under Access redirect)
        }
      };
    }
  }

  if (iframeReloadBtn) {
    iframeReloadBtn.addEventListener('click', () => {
      if (currentIframeUrl) showIframeView(currentIframeUrl);
    });
  }

  if (btnAuthNoticeReload) {
    btnAuthNoticeReload.addEventListener('click', () => {
      if (currentIframeUrl) showIframeView(currentIframeUrl);
    });
  }

  if (btnAuthNoticeDismiss) {
    btnAuthNoticeDismiss.addEventListener('click', () => {
      if (iframeAuthNotice) iframeAuthNotice.style.display = 'none';
    });
  }

  // Load Conversations List
  async function loadConversations() {
    convList.innerHTML = '<div class="hub-conv-loading" style="padding: 1rem; color: var(--hub-text-muted); font-size: 0.75rem; text-align: center;">Chargement...</div>';
    
    try {
      const res = await fetch(`/api/chat/${currentUniverse}/conversations`);
      const data = await res.json();
      currentConversations = data.conversations || [];
      renderConversationsList();
      
      if (currentConversations.length > 0 && !currentSessionKey) {
        selectConversation(currentConversations[0].session_key);
      } else if (!currentSessionKey) {
        startNewConversation(false);
      }
    } catch (err) {
      convList.innerHTML = '<div style="padding: 1rem; color: #ef4444; font-size: 0.75rem; text-align: center;">Erreur de chargement</div>';
    }
  }

  function renderConversationsList() {
    const filter = (convSearch ? convSearch.value.trim().toLowerCase() : '');
    const filtered = currentConversations.filter(c => !filter || (c.title && c.title.toLowerCase().includes(filter)));

    if (filtered.length === 0) {
      convList.innerHTML = '<div style="padding: 1rem; color: var(--hub-text-muted); font-size: 0.75rem; text-align: center;">Aucune discussion</div>';
      return;
    }

    const pinned = filtered.filter(c => c.pinned);
    const recents = filtered.filter(c => !c.pinned);

    let html = '';

    if (pinned.length > 0) {
      html += '<div class="hub-conv-group-title">📌 Épinglées</div>';
      pinned.forEach(c => {
        html += renderConvItem(c);
      });
    }

    if (recents.length > 0) {
      if (pinned.length > 0) html += '<div class="hub-conv-group-title" style="margin-top: 0.5rem;">Discussions récentes</div>';
      recents.forEach(c => {
        html += renderConvItem(c);
      });
    }

    convList.innerHTML = html;

    // Attach click events
    convList.querySelectorAll('.hub-conv-item').forEach(item => {
      item.addEventListener('click', (e) => {
        if (e.target.closest('.hub-conv-action-btn')) return;
        const key = item.getAttribute('data-session-key');
        selectConversation(key);
      });
    });

    // Attach actions
    convList.querySelectorAll('.btn-pin-conv').forEach(btn => {
      btn.addEventListener('click', async (e) => {
        e.stopPropagation();
        const key = btn.getAttribute('data-session-key');
        const isPinned = btn.getAttribute('data-pinned') === '1';
        await togglePin(key, !isPinned);
      });
    });

    convList.querySelectorAll('.btn-rename-conv').forEach(btn => {
      btn.addEventListener('click', async (e) => {
        e.stopPropagation();
        const key = btn.getAttribute('data-session-key');
        const currentT = btn.getAttribute('data-title');
        const newTitle = prompt('Nouveau titre de la discussion :', currentT);
        if (newTitle && newTitle.trim() && newTitle.trim() !== currentT) {
          await renameConv(key, newTitle.trim());
        }
      });
    });

    convList.querySelectorAll('.btn-delete-conv').forEach(btn => {
      btn.addEventListener('click', async (e) => {
        e.stopPropagation();
        const key = btn.getAttribute('data-session-key');
        if (confirm('Supprimer définitivement cette discussion ?')) {
          await deleteConv(key);
        }
      });
    });
  }

  function renderConvItem(c) {
    const isActive = c.session_key === currentSessionKey;
    const timeStr = c.updated_at ? new Date(c.updated_at).toLocaleDateString('fr-FR', { month: 'short', day: 'numeric' }) : '';
    
    return `
      <div class="hub-conv-item ${isActive ? 'active' : ''}" data-session-key="${escapeHtml(c.session_key)}">
        <div class="hub-conv-item-top">
          <span class="hub-conv-title" title="${escapeHtml(c.title)}">${c.pinned ? '📌 ' : ''}${escapeHtml(c.title || 'Discussion')}</span>
          <div class="hub-conv-actions">
            <button class="hub-conv-action-btn btn-pin-conv" data-session-key="${escapeHtml(c.session_key)}" data-pinned="${c.pinned ? '1' : '0'}" title="${c.pinned ? 'Désépingler' : 'Épingler'}">📌</button>
            <button class="hub-conv-action-btn btn-rename-conv" data-session-key="${escapeHtml(c.session_key)}" data-title="${escapeHtml(c.title)}" title="Renommer">✏️</button>
            <button class="hub-conv-action-btn btn-delete-conv" data-session-key="${escapeHtml(c.session_key)}" title="Supprimer">🗑️</button>
          </div>
        </div>
        <div class="hub-conv-meta">
          <span>${timeStr}</span>
        </div>
      </div>
    `;
  }

  // Select Conversation
  async function selectConversation(sessionKey) {
    currentSessionKey = sessionKey;
    renderConversationsList();

    const conv = currentConversations.find(c => c.session_key === sessionKey);
    if (conv) {
      chatHeaderTitle.textContent = conv.title || 'Discussion';
      if (btnPinActive) btnPinActive.textContent = conv.pinned ? '📍' : '📌';
    }

    messagesContainer.innerHTML = '<div style="margin:auto;text-align:center;color:var(--hub-text-muted);font-size:0.8rem;">Chargement des messages...</div>';

    try {
      const res = await fetch(`/api/chat/${currentUniverse}/conversations/${sessionKey}/messages`);
      const data = await res.json();
      renderMessages(data.messages || []);
    } catch (err) {
      messagesContainer.innerHTML = '<div style="margin:auto;text-align:center;color:#ef4444;font-size:0.8rem;">Erreur de chargement des messages</div>';
    }
  }

  // Start New Conversation
  async function startNewConversation(focus = true) {
    try {
      const res = await fetch(`/api/chat/${currentUniverse}/conversations`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ title: 'Nouvelle conversation' })
      });
      const data = await res.json();
      if (data.ok && data.conversation) {
        currentSessionKey = data.conversation.session_key;
        currentConversations.unshift(data.conversation);
        renderConversationsList();
        chatHeaderTitle.textContent = 'Nouvelle conversation';
        renderMessages([]);
        if (focus && chatInput) chatInput.focus();
      }
    } catch (err) {
      console.error('Failed to create new conversation:', err);
    }
  }

  // Render Messages
  function renderMessages(messages) {
    if (!messages || messages.length === 0) {
      messagesContainer.innerHTML = `
        <div class="hub-empty-state">
          <div class="hub-empty-icon">💬</div>
          <h3>Discussion avec ${escapeHtml(activeTitle.textContent)}</h3>
          <p>Posez une question ou donnez une instruction pour démarrer la session.</p>
        </div>
      `;
      return;
    }

    let html = '';
    messages.forEach(m => {
      const isUser = m.role === 'user';
      const avatarText = isUser ? 'VOUS' : currentUniverse.toUpperCase().slice(0, 2);
      
      let reasoningHtml = '';
      if (m.reasoning) {
        reasoningHtml = `
          <details class="hub-msg-reasoning">
            <summary>Raisonnement de l'agent</summary>
            <div style="margin-top: 0.4rem; white-space: pre-wrap;">${escapeHtml(m.reasoning)}</div>
          </details>
        `;
      }

      html += `
        <div class="hub-msg ${isUser ? 'hub-msg-user' : 'hub-msg-assistant'}">
          <div class="hub-msg-avatar">${avatarText}</div>
          <div class="hub-msg-bubble">
            ${reasoningHtml}
            <div class="hub-msg-content">${renderMarkdown(m.content)}</div>
          </div>
        </div>
      `;
    });

    messagesContainer.innerHTML = html;
    scrollToBottom();
  }

  function scrollToBottom() {
    messagesContainer.scrollTop = messagesContainer.scrollHeight;
  }

  // Send Message & Handle SSE Streaming
  async function sendMessage() {
    const text = chatInput.value.trim();
    if (!text || isStreaming) return;

    if (!currentSessionKey) {
      await startNewConversation(false);
    }

    // Append user message immediately
    const userMsgHtml = `
      <div class="hub-msg hub-msg-user">
        <div class="hub-msg-avatar">VOUS</div>
        <div class="hub-msg-bubble">
          <div class="hub-msg-content">${renderMarkdown(text)}</div>
        </div>
      </div>
    `;

    // Remove empty state if present
    const emptyState = messagesContainer.querySelector('.hub-empty-state');
    if (emptyState) emptyState.remove();

    messagesContainer.insertAdjacentHTML('beforeend', userMsgHtml);
    chatInput.value = '';
    chatInput.style.height = 'auto';
    scrollToBottom();

    // Prepare assistant message bubble with streaming cursor
    const assistantId = `msg-stream-${Date.now()}`;
    const assistantMsgHtml = `
      <div id="${assistantId}" class="hub-msg hub-msg-assistant">
        <div class="hub-msg-avatar">${currentUniverse.toUpperCase().slice(0, 2)}</div>
        <div class="hub-msg-bubble">
          <div class="hub-msg-content"><span class="stream-text"></span><span class="hub-streaming-cursor"></span></div>
        </div>
      </div>
    `;
    messagesContainer.insertAdjacentHTML('beforeend', assistantMsgHtml);
    scrollToBottom();

    const streamBubble = document.getElementById(assistantId);
    const streamTextEl = streamBubble.querySelector('.stream-text');
    const cursorEl = streamBubble.querySelector('.hub-streaming-cursor');

    // UI Streaming state
    setStreamingState(true);
    chatHeaderStatus.textContent = 'En train de répondre...';

    currentAbortController = new AbortController();

    try {
      const response = await fetch(`/api/chat/${currentUniverse}/conversations/${currentSessionKey}/send`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ message: text }),
        signal: currentAbortController.signal
      });

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

      const reader = response.body.getReader();
      const decoder = new TextDecoder();
      let buffer = '';
      let accumulatedText = '';

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

        buffer += decoder.decode(value, { stream: true });
        const lines = buffer.split('\n');
        buffer = lines.pop(); // Keep last partial line

        for (const line of lines) {
          if (line.startsWith('data: ')) {
            const rawData = line.slice(6).trim();
            if (!rawData) continue;
            try {
              const data = JSON.parse(rawData);
              
              if (data.fullReplace && data.text !== undefined) {
                // Workspace chunk with fullReplace: true
                accumulatedText = data.text;
                streamTextEl.innerHTML = renderMarkdown(accumulatedText);
              } else if (data.text) {
                accumulatedText = data.text;
                streamTextEl.innerHTML = renderMarkdown(accumulatedText);
              } else if (data.chunk) {
                accumulatedText += data.chunk;
                streamTextEl.innerHTML = renderMarkdown(accumulatedText);
              }
              scrollToBottom();
            } catch (e) {}
          }
        }
      }

      // Final rendering
      if (cursorEl) cursorEl.remove();
      streamTextEl.innerHTML = renderMarkdown(accumulatedText || 'Message reçu.');
      chatHeaderStatus.textContent = 'Prêt';
      
      // Refresh conversations list to update title / timestamp
      loadConversations();

    } catch (err) {
      if (err.name === 'AbortError') {
        if (cursorEl) cursorEl.remove();
        streamTextEl.innerHTML += '<br><em style="color:var(--hub-text-muted);font-size:0.75rem;">[Réponse interrompue]</em>';
      } else {
        if (cursorEl) cursorEl.remove();
        streamTextEl.innerHTML = `<span style="color:#ef4444;">Erreur lors de la réponse (${err.message}). Vérifiez l'instance.</span>`;
      }
      chatHeaderStatus.textContent = 'Prêt';
    } finally {
      setStreamingState(false);
      currentAbortController = null;
      scrollToBottom();
    }
  }

  function setStreamingState(streaming) {
    isStreaming = streaming;
    btnSend.style.display = streaming ? 'none' : 'flex';
    btnStop.style.display = streaming ? 'flex' : 'none';
  }

  function stopStreaming() {
    if (currentAbortController) {
      currentAbortController.abort();
    }
  }

  // Conversation Actions (Pin, Rename, Delete)
  async function togglePin(sessionKey, pinned) {
    try {
      await fetch(`/api/chat/${currentUniverse}/conversations/${sessionKey}`, {
        method: 'PATCH',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ pinned: pinned })
      });
      loadConversations();
    } catch (err) {
      console.error('Failed to toggle pin:', err);
    }
  }

  async function renameConv(sessionKey, title) {
    try {
      await fetch(`/api/chat/${currentUniverse}/conversations/${sessionKey}`, {
        method: 'PATCH',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ title: title })
      });
      if (sessionKey === currentSessionKey) {
        chatHeaderTitle.textContent = title;
      }
      loadConversations();
    } catch (err) {
      console.error('Failed to rename conversation:', err);
    }
  }

  async function deleteConv(sessionKey) {
    try {
      await fetch(`/api/chat/${currentUniverse}/conversations/${sessionKey}`, {
        method: 'DELETE'
      });
      if (sessionKey === currentSessionKey) {
        currentSessionKey = null;
      }
      loadConversations();
    } catch (err) {
      console.error('Failed to delete conversation:', err);
    }
  }

  // Event Listeners
  if (btnNewChat) {
    btnNewChat.addEventListener('click', () => startNewConversation(true));
  }

  if (convSearch) {
    convSearch.addEventListener('input', () => renderConversationsList());
  }

  if (chatForm) {
    chatForm.addEventListener('submit', (e) => {
      e.preventDefault();
      sendMessage();
    });
  }

  if (chatInput) {
    // Auto-resize textarea
    chatInput.addEventListener('input', () => {
      chatInput.style.height = 'auto';
      chatInput.style.height = Math.min(chatInput.scrollHeight, 160) + 'px';
    });

    // Enter to submit (Shift+Enter for newline)
    chatInput.addEventListener('keydown', (e) => {
      if (e.key === 'Enter' && !e.shiftKey) {
        e.preventDefault();
        sendMessage();
      }
    });
  }

  if (btnStop) {
    btnStop.addEventListener('click', () => stopStreaming());
  }

  if (btnPinActive) {
    btnPinActive.addEventListener('click', () => {
      if (!currentSessionKey) return;
      const conv = currentConversations.find(c => c.session_key === currentSessionKey);
      if (conv) togglePin(currentSessionKey, !conv.pinned);
    });
  }

  if (btnRenameActive) {
    btnRenameActive.addEventListener('click', () => {
      if (!currentSessionKey) return;
      const conv = currentConversations.find(c => c.session_key === currentSessionKey);
      const currentT = conv ? conv.title : 'Discussion';
      const newTitle = prompt('Nouveau titre de la discussion :', currentT);
      if (newTitle && newTitle.trim()) renameConv(currentSessionKey, newTitle.trim());
    });
  }

  if (btnDeleteActive) {
    btnDeleteActive.addEventListener('click', () => {
      if (!currentSessionKey) return;
      if (confirm('Supprimer définitivement cette discussion ?')) {
        deleteConv(currentSessionKey);
      }
    });
  }

  // DSH Mode Switcher (Dialogue DSH vs Explorateur de Fichiers)
  if (tabSession) {
    tabSession.addEventListener('click', () => {
      tabSession.classList.add('active');
      tabFiles.classList.remove('active');
      showIframeView(`https://dsh-hub.yesminedor.tn/`);
    });
  }

  if (tabFiles) {
    tabFiles.addEventListener('click', () => {
      tabFiles.classList.add('active');
      tabSession.classList.remove('active');
      showIframeView(`https://files-hub.yesminedor.tn/`);
    });
  }

  // Universe Switcher Buttons
  universeBtns.forEach(btn => {
    btn.addEventListener('click', () => {
      const uId = btn.getAttribute('data-universe');
      switchUniverse(uId);
    });
  });

  // Persona Modal Handlers
  if (btnEditPersona && personaModal) {
    btnEditPersona.addEventListener('click', async () => {
      try {
        const res = await fetch(`/api/personas/${currentUniverse}`);
        const data = await res.json();
        document.getElementById('persona-name').value = data.name || '';
        document.getElementById('persona-tagline').value = data.tagline || '';
        document.getElementById('persona-tone').value = data.tone || '';
        document.getElementById('persona-style').value = data.style || '';
        document.getElementById('persona-principles').value = (data.principles || []).join('\n');
        document.getElementById('persona-prompt').value = data.system_prompt || '';
        personaModal.classList.add('active');
      } catch (err) {
        alert('Impossible de charger le profil de cet univers.');
      }
    });
  }

  if (btnSavePersona && personaModal) {
    btnSavePersona.addEventListener('click', async () => {
      const payload = {
        name: document.getElementById('persona-name').value.trim(),
        tagline: document.getElementById('persona-tagline').value.trim(),
        tone: document.getElementById('persona-tone').value.trim(),
        style: document.getElementById('persona-style').value.trim(),
        principles: document.getElementById('persona-principles').value.split('\n').map(l => l.trim()).filter(Boolean),
        system_prompt: document.getElementById('persona-prompt').value.trim()
      };

      try {
        const res = await fetch(`/api/personas/${currentUniverse}`, {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(payload)
        });
        if (res.ok) {
          personaModal.classList.remove('active');
          alert('Personnalité mise à jour avec succès.');
        }
      } catch (err) {
        alert('Erreur lors de la sauvegarde.');
      }
    });
  }

  // Clone Modal Handlers
  if (btnCloneUniverse && cloneModal) {
    btnCloneUniverse.addEventListener('click', () => {
      document.getElementById('clone-source-name').textContent = activeTitle.textContent;
      document.getElementById('clone-name').value = '';
      cloneModal.classList.add('active');
    });
  }

  if (btnSubmitClone && cloneModal) {
    btnSubmitClone.addEventListener('click', async () => {
      const cloneName = document.getElementById('clone-name').value.trim();
      if (!cloneName) return;

      try {
        const res = await fetch(`/api/clones`, {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({
            source_universe_id: currentUniverse,
            clone_name: cloneName
          })
        });
        if (res.ok) {
          cloneModal.classList.remove('active');
          alert('Clone créé avec succès.');
        }
      } catch (err) {
        alert('Erreur lors du clonage.');
      }
    });
  }

  // Close modals
  document.querySelectorAll('.hub-modal-close').forEach(btn => {
    btn.addEventListener('click', () => {
      if (personaModal) personaModal.classList.remove('active');
      if (cloneModal) cloneModal.classList.remove('active');
    });
  });

  // Universe Health Monitoring Probe
  async function probeUniverseStatuses() {
    try {
      const res = await fetch('/api/universes');
      if (!res.ok) return;
      const data = await res.json();
      
      data.forEach(u => {
        const dot = document.getElementById(`status-dot-${u.id}`);
        if (dot) {
          dot.className = `hub-status-dot ${u.status}`;
          dot.title = `Statut: ${u.status} (${u.status_code || 'N/A'})`;
        }
      });
    } catch (e) {}
  }

  // Initialize
  probeUniverseStatuses();
  setInterval(probeUniverseStatuses, 15000);
  switchUniverse('tt');
});