function chatApp() {
  return {
    // Current navigation section (e.g., All Chats, Direct, Group)
    current: 'All Chats',
    // Search term for filtering chats
    search: '',
    // Currently selected chat object
    selectedChat: null,
    // Navigation items similar to the Drive UI
    navItems: [
      { name: 'All Chats', icon: '💬' },
      { name: 'Direct', icon: '👤' },
      { name: 'Groups', icon: '👥' },
      { name: 'Archived', icon: '🗄' }
    ],
    // Sample chat list – in a real app this would be fetched from a server
    chats: [
      { id: 1, name: 'General Bot Support', icon: '🤖', lastMessage: 'How can I help you?', time: '10:15 AM', status: 'Online' },
      { id: 2, name: 'Project Alpha', icon: '🚀', lastMessage: 'Launch scheduled for tomorrow.', time: 'Yesterday', status: 'Active' },
      { id: 3, name: 'Team Stand‑up', icon: '🗣️', lastMessage: 'Done with the UI updates.', time: '2 hrs ago', status: 'Active' },
      { id: 4, name: 'Random Chat', icon: '🎲', lastMessage: 'Did you see the game last night?', time: '5 hrs ago', status: 'Idle' },
      { id: 5, name: 'Support Ticket #1234', icon: '🛠️', lastMessage: 'Issue resolved, closing ticket.', time: '3 days ago', status: 'Closed' }
    ],
    // Computed property – filters chats based on the search term
    get filteredChats() {
      return this.chats.filter(chat =>
        chat.name.toLowerCase().includes(this.search.toLowerCase())
      );
    }
  };
}

/* ----- Full application mechanics migrated from web/html/index.html ----- */

let ws=null,currentSessionId=null,currentUserId=null,currentBotId="default_bot",isStreaming=false,voiceRoom=null,isVoiceMode=false,mediaRecorder=null,audioChunks=[],streamingMessageId=null,isThinking=false,currentStreamingContent="",hasReceivedInitialMessage=false,reconnectAttempts=0,reconnectTimeout=null,thinkingTimeout=null,currentTheme='auto',themeColor1=null,themeColor2=null,customLogoUrl=null,contextUsage=0,isUserScrolling=false,autoScrollEnabled=true,isContextChange=false;
const maxReconnectAttempts=5,messagesDiv=document.getElementById("messages"),input=document.getElementById("messageInput"),sendBtn=document.getElementById("sendBtn"),voiceBtn=document.getElementById("voiceBtn"),connectionStatus=document.getElementById("connectionStatus"),flashOverlay=document.getElementById("flashOverlay"),suggestionsContainer=document.getElementById("suggestions"),floatLogo=document.getElementById("floatLogo"),sidebar=document.getElementById("sidebar"),themeBtn=document.getElementById("themeBtn"),scrollToBottomBtn=document.getElementById("scrollToBottom"),contextIndicator=document.getElementById("contextIndicator"),contextPercentage=document.getElementById("contextPercentage"),contextProgressBar=document.getElementById("contextProgressBar"),sidebarTitle=document.getElementById("sidebarTitle");
marked.setOptions({breaks:true,gfm:true});

floatLogo.addEventListener('click',toggleSidebar);

function toggleSidebar(){
  sidebar.classList.toggle('open');
}

function toggleTheme(){
  const themes=['auto','dark','light'];
  const savedTheme=localStorage.getItem('gb-theme')||'auto';
  const idx=themes.indexOf(savedTheme);
  const newTheme=themes[(idx+1)%themes.length];
  localStorage.setItem('gb-theme',newTheme);
  currentTheme=newTheme;
  applyTheme();
  updateThemeButton();
}

function updateThemeButton(){
  const icons={'auto':'⚙','dark':'🌙','light':'☀️'};
  themeBtn.textContent=icons[currentTheme]||'⚙';
}

function applyTheme(){
  const prefersDark=window.matchMedia('(prefers-color-scheme: dark)').matches;
  let theme=currentTheme;
  if(theme==='auto'){
    theme=prefersDark?'dark':'light';
  }
  document.documentElement.setAttribute('data-theme',theme);
  if(themeColor1&&themeColor2){
    const root=document.documentElement;
    root.style.setProperty('--bg',theme==='dark'?themeColor2:themeColor1);
    root.style.setProperty('--fg',theme==='dark'?themeColor1:themeColor2);
  }
  if(customLogoUrl){
    document.documentElement.style.setProperty('--logo-url',`url('${customLogoUrl}')`);
  }
}

window.addEventListener("load",function(){
  const savedTheme=localStorage.getItem('gb-theme')||'auto';
  currentTheme=savedTheme;
  applyTheme();
  updateThemeButton();
  window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change',()=>{
    if(currentTheme==='auto'){
      applyTheme();
    }
  });
  input.focus();
});

themeBtn.addEventListener('click',toggleTheme);

document.addEventListener('click',function(e){
  if(sidebar.classList.contains('open')&&!sidebar.contains(e.target)&&!floatLogo.contains(e.target)){
    sidebar.classList.remove('open');
  }
});

messagesDiv.addEventListener('scroll',function(){
  const isAtBottom=messagesDiv.scrollHeight-messagesDiv.scrollTop<=messagesDiv.clientHeight+100;
  if(!isAtBottom){
    isUserScrolling=true;
    scrollToBottomBtn.classList.add('visible');
  }else{
    isUserScrolling=false;
    scrollToBottomBtn.classList.remove('visible');
  }
});

scrollToBottomBtn.addEventListener('click',function(){
  scrollToBottom();
});

function updateContextUsage(u){
  contextUsage=u;
  const p=Math.min(100,Math.round(u*100));
  contextPercentage.textContent=`${p}%`;
  contextProgressBar.style.width=`${p}%`;
  contextIndicator.classList.remove('visible');
}

function flashScreen(){
  gsap.to(flashOverlay,{opacity:0.15,duration:0.1,onComplete:()=>{gsap.to(flashOverlay,{opacity:0,duration:0.2});}});
}

function updateConnectionStatus(s){
  connectionStatus.className=`connection-status ${s}`;
}

function getWebSocketUrl(){
  const p="ws:",s=currentSessionId||crypto.randomUUID(),u=currentUserId||crypto.randomUUID();
  return`${p}//localhost:8080/ws?session_id=${s}&user_id=${u}`;
}

async function initializeAuth(){
  try{
    updateConnectionStatus("connecting");
    const p=window.location.pathname.split('/').filter(s=>s),b=p.length>0?p[0]:'default',r=await fetch(`http://localhost:8080/api/auth?bot_name=${encodeURIComponent(b)}`),a=await r.json();
    currentUserId=a.user_id;
    currentSessionId=a.session_id;
    connectWebSocket();
    loadSessions();
  }catch(e){
    console.error("Failed to initialize auth:",e);
    updateConnectionStatus("disconnected");
    setTimeout(initializeAuth,3000);
  }
}

async function loadSessions(){
  try{
    const r=await fetch("http://localhost:8080/api/sessions"),s=await r.json(),h=document.getElementById("history");
    h.innerHTML="";
    s.forEach(session=>{
      const item=document.createElement('div');
      item.className='history-item';
      item.textContent=session.title||`Session ${session.session_id.substring(0,8)}`;
      item.onclick=()=>switchSession(session.session_id);
      h.appendChild(item);
    });
  }catch(e){
    console.error("Failed to load sessions:",e);
  }
}

async function createNewSession(){
  try{
    const r=await fetch("http://localhost:8080/api/sessions",{method:"POST"}),s=await r.json();
    currentSessionId=s.session_id;
    hasReceivedInitialMessage=false;
    connectWebSocket();
    loadSessions();
    messagesDiv.innerHTML="";
    clearSuggestions();
    updateContextUsage(0);
    if(isVoiceMode){
      await stopVoiceSession();
      isVoiceMode=false;
      const v=document.getElementById("voiceToggle");
      v.textContent="🎤 Voice Mode";
      voiceBtn.classList.remove("recording");
    }
  }catch(e){
    console.error("Failed to create session:",e);
  }
}

function switchSession(s){
  currentSessionId=s;
  hasReceivedInitialMessage=false;
  loadSessionHistory(s);
  connectWebSocket();
  if(isVoiceMode){
    startVoiceSession();
  }
  sidebar.classList.remove('open');
}

async function loadSessionHistory(s){
  try{
    const r=await fetch("http://localhost:8080/api/sessions/"+s),h=await r.json(),m=document.getElementById("messages");
    m.innerHTML="";
    if(h.length===0){
      updateContextUsage(0);
    }else{
      h.forEach(([role,content])=>{
        addMessage(role,content,false);
      });
      updateContextUsage(h.length/20);
    }
  }catch(e){
    console.error("Failed to load session history:",e);
  }
}

function connectWebSocket(){
  if(ws){
    ws.close();
  }
  clearTimeout(reconnectTimeout);
  const u=getWebSocketUrl();
  ws=new WebSocket(u);
  ws.onmessage=function(e){
    const r=JSON.parse(e.data);
    if(r.bot_id){
      currentBotId=r.bot_id;
    }
    if(r.message_type===2){
      const d=JSON.parse(r.content);
      handleEvent(d.event,d.data);
      return;
    }
    if(r.message_type===5){
      isContextChange=true;
      return;
    }
    processMessageContent(r);
  };
  ws.onopen=function(){
    console.log("Connected to WebSocket");
    updateConnectionStatus("connected");
    reconnectAttempts=0;
    hasReceivedInitialMessage=false;
  };
  ws.onclose=function(e){
    console.log("WebSocket disconnected:",e.code,e.reason);
    updateConnectionStatus("disconnected");
    if(isStreaming){
      showContinueButton();
    }
    if(reconnectAttempts<maxReconnectAttempts){
      reconnectAttempts++;
      const d=Math.min(1000*reconnectAttempts,10000);
      reconnectTimeout=setTimeout(()=>{
        updateConnectionStatus("connecting");
        connectWebSocket();
      },d);
    }else{
      updateConnectionStatus("disconnected");
    }
  };
  ws.onerror=function(e){
    console.error("WebSocket error:",e);
    updateConnectionStatus("disconnected");
  };
}

function processMessageContent(r){
  if(isContextChange){
    isContextChange=false;
    return;
  }
  if(r.context_usage!==undefined){
    updateContextUsage(r.context_usage);
  }
  if(r.suggestions&&r.suggestions.length>0){
    handleSuggestions(r.suggestions);
  }
  if(r.is_complete){
    if(isStreaming){
      finalizeStreamingMessage();
      isStreaming=false;
      streamingMessageId=null;
      currentStreamingContent="";
    }else{
      addMessage("assistant",r.content,false);
    }
  }else{
    if(!isStreaming){
      isStreaming=true;
      streamingMessageId="streaming-"+Date.now();
      currentStreamingContent=r.content||"";
      addMessage("assistant",currentStreamingContent,true,streamingMessageId);
    }else{
      currentStreamingContent+=r.content||"";
      updateStreamingMessage(currentStreamingContent);
    }
  }
}

function handleEvent(t,d){
  console.log("Event received:",t,d);
  switch(t){
    case"thinking_start":
      showThinkingIndicator();
      break;
    case"thinking_end":
      hideThinkingIndicator();
      break;
    case"warn":
      showWarning(d.message);
      break;
    case"context_usage":
      updateContextUsage(d.usage);
      break;
    case"change_theme":
      if(d.color1)themeColor1=d.color1;
      if(d.color2)themeColor2=d.color2;
      if(d.logo_url)customLogoUrl=d.logo_url;
      if(d.title)document.title=d.title;
      if(d.logo_text){
        sidebarTitle.textContent=d.logo_text;
      }
      applyTheme();
      break;
  }
}

function showThinkingIndicator(){
  if(isThinking)return;
  const t=document.createElement("div");
  t.id="thinking-indicator";
  t.className="message-container";
  t.innerHTML=`<div class="assistant-message"><div class="assistant-avatar"></div><div class="thinking-indicator"><div class="typing-dots"><div class="typing-dot"></div><div class="typing-dot"></div><div class="typing-dot"></div></div></div></div>`;
  messagesDiv.appendChild(t);
  gsap.to(t,{opacity:1,y:0,duration:.3,ease:"power2.out"});
  if(!isUserScrolling){
    scrollToBottom();
  }
  thinkingTimeout=setTimeout(()=>{
    if(isThinking){
      hideThinkingIndicator();
      showWarning("O servidor pode estar ocupado. A resposta está demorando demais.");
    }
  },60000);
  isThinking=true;
}

function hideThinkingIndicator(){
  if(!isThinking)return;
  const t=document.getElementById("thinking-indicator");
  if(t){
    gsap.to(t,{opacity:0,duration:.2,onComplete:()=>{if(t.parentNode){t.remove();}}});
  }
  if(thinkingTimeout){
    clearTimeout(thinkingTimeout);
    thinkingTimeout=null;
  }
  isThinking=false;
}

function showWarning(m){
  const w=document.createElement("div");
  w.className="warning-message";
  w.innerHTML=`⚠️ ${m}`;
  messagesDiv.appendChild(w);
  gsap.from(w,{opacity:0,y:20,duration:.4,ease:"power2.out"});
  if(!isUserScrolling){
    scrollToBottom();
  }
  setTimeout(()=>{
    if(w.parentNode){
      gsap.to(w,{opacity:0,duration:.3,onComplete:()=>w.remove()});
    }
  },5000);
}

function showContinueButton(){
  const c=document.createElement("div");
  c.className="message-container";
  c.innerHTML=`<div class="assistant-message"><div class="assistant-avatar"></div><div class="assistant-message-content"><p>A conexão foi interrompida. Clique em "Continuar" para tentar recuperar a resposta.</p><button class="continue-button" onclick="continueInterruptedResponse()">Continuar</button></div></div>`;
  messagesDiv.appendChild(c);
  gsap.to(c,{opacity:1,y:0,duration:.5,ease:"power2.out"});
  if(!isUserScrolling){
    scrollToBottom();
  }
}

function continueInterruptedResponse(){
  if(!ws||ws.readyState!==WebSocket.OPEN){
    connectWebSocket();
  }
  if(ws&&ws.readyState===WebSocket.OPEN){
    const d={bot_id:"default_bot",user_id:currentUserId,session_id:currentSessionId,channel:"web",content:"continue",message_type:3,media_url:null,timestamp:new Date().toISOString()};
    ws.send(JSON.stringify(d));
  }
  document.querySelectorAll(".continue-button").forEach(b=>{b.parentElement.parentElement.parentElement.remove();});
}

function addMessage(role,content,streaming=false,msgId=null){
  const m=document.createElement("div");
  m.className="message-container";
  if(role==="user"){
    m.innerHTML=`<div class="user-message"><div class="user-message-content">${escapeHtml(content)}</div></div>`;
    updateContextUsage(contextUsage+.05);
  }else if(role==="assistant"){
    m.innerHTML=`<div class="assistant-message"><div class="assistant-avatar"></div><div class="assistant-message-content markdown-content" id="${msgId||""}">${streaming?"":marked.parse(content)}</div></div>`;
    updateContextUsage(contextUsage+.03);
  }else if(role==="voice"){
    m.innerHTML=`<div class="assistant-message"><div class="assistant-avatar">🎤</div><div class="assistant-message-content">${content}</div></div>`;
  }else{
    m.innerHTML=`<div class="assistant-message"><div class="assistant-avatar"></div><div class="assistant-message-content">${content}</div></div>`;
  }
  messagesDiv.appendChild(m);
  gsap.to(m,{opacity:1,y:0,duration:.5,ease:"power2.out"});
  if(!isUserScrolling){
    scrollToBottom();
  }
}

function updateStreamingMessage(c){
  const m=document.getElementById(streamingMessageId);
  if(m){
    m.innerHTML=marked.parse(c);
    if(!isUserScrolling){
      scrollToBottom();
    }
  }
}

function finalizeStreamingMessage(){
  const m=document.getElementById(streamingMessageId);
  if(m){
    m.innerHTML=marked.parse(currentStreamingContent);
    m.removeAttribute("id");
    if(!isUserScrolling){
      scrollToBottom();
    }
  }
}

function escapeHtml(t){
  const d=document.createElement("div");
  d.textContent=t;
  return d.innerHTML;
}

function clearSuggestions(){
  suggestionsContainer.innerHTML='';
}

function handleSuggestions(s){
  const uniqueSuggestions=s.filter((v,i,a)=>i===a.findIndex(t=>t.text===v.text&&t.context===v.context));
  suggestionsContainer.innerHTML='';
  uniqueSuggestions.forEach(v=>{
    const b=document.createElement('button');
    b.textContent=v.text;
    b.className='suggestion-button';
    b.onclick=()=>{setContext(v.context);input.value='';};
    suggestionsContainer.appendChild(b);
  });
}

let pendingContextChange=null;

async function setContext(c){
  try{
    const t=event?.target?.textContent||c;
    addMessage("user",t);
    const i=document.getElementById('messageInput');
    if(i){i.value='';}
    if(ws&&ws.readyState===WebSocket.OPEN){
      pendingContextChange=new Promise(r=>{
        const h=e=>{
          const d=JSON.parse(e.data);
          if(d.message_type===5&&d.context_name===c){
            ws.removeEventListener('message',h);
            r();
          }
        };
        ws.addEventListener('message',h);
        const s={bot_id:currentBotId,user_id:currentUserId,session_id:currentSessionId,channel:"web",content:t,message_type:4,is_suggestion:true,context_name:c,timestamp:new Date().toISOString()};
        ws.send(JSON.stringify(s));
      });
      await pendingContextChange;
      const x=document.getElementById('contextIndicator');
      if(x){document.getElementById('contextPercentage').textContent=c;}
    }else{
      console.warn("WebSocket não está conectado. Tentando reconectar...");
      connectWebSocket();
    }
  }catch(err){
    console.error('Failed to set context:',err);
  }
}

async function sendMessage(){
  if(pendingContextChange){
    await pendingContextChange;
    pendingContextChange=null;
  }
  const m=input.value.trim();
  if(!m||!ws||ws.readyState!==WebSocket.OPEN){
    if(!ws||ws.readyState!==WebSocket.OPEN){
      showWarning("Conexão não disponível. Tentando reconectar...");
      connectWebSocket();
    }
    return;
  }
  if(isThinking){
    hideThinkingIndicator();
  }
  addMessage("user",m);
  const d={bot_id:currentBotId,user_id:currentUserId,session_id:currentSessionId,channel:"web",content:m,message_type:1,media_url:null,timestamp:new Date().toISOString()};
  ws.send(JSON.stringify(d));
  input.value="";
  input.focus();
}

sendBtn.onclick=sendMessage;
input.addEventListener("keypress",e=>{if(e.key==="Enter")sendMessage();});

async function toggleVoiceMode(){
  isVoiceMode=!isVoiceMode;
  const v=document.getElementById("voiceToggle");
  if(isVoiceMode){
    v.textContent="🔴 Stop Voice";
    v.classList.add("recording");
    await startVoiceSession();
  }else{
    v.textContent="🎤 Voice Mode";
    v.classList.remove("recording");
    await stopVoiceSession();
  }
}

async function startVoiceSession(){
  if(!currentSessionId)return;
  try{
    const r=await fetch("http://localhost:8080/api/voice/start",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({session_id:currentSessionId,user_id:currentUserId})}),d=await r.json();
    if(d.token){
      await connectToVoiceRoom(d.token);
      startVoiceRecording();
    }
  }catch(e){
    console.error("Failed to start voice session:",e);
    showWarning("Falha ao iniciar modo de voz");
  }
}

async function stopVoiceSession(){
  if(!currentSessionId)return;
  try{
    await fetch("http://localhost:8080/api/voice/stop",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({session_id:currentSessionId})});
    if(voiceRoom){
      voiceRoom.disconnect();
      voiceRoom=null;
    }
    if(mediaRecorder&&mediaRecorder.state==="recording"){
      mediaRecorder.stop();
    }
  }catch(e){
    console.error("Failed to stop voice session:",e);
  }
}

async function connectToVoiceRoom(t){
  try{
    const r=new LiveKitClient.Room(),p="ws:",u=`${p}//localhost:8080/voice`;
    await r.connect(u,t);
    voiceRoom=r;
    r.on("dataReceived",d=>{
      const dc=new TextDecoder(),m=dc.decode(d);
      try{
        const j=JSON.parse(m);
        if(j.type==="voice_response"){
          addMessage("assistant",j.text);
        }
      }catch(e){
        console.log("Voice data:",m);
      }
    });
    const l=await LiveKitClient.createLocalTracks({audio:true,video:false});
    for(const k of l){
      await r.localParticipant.publishTrack(k);
    }
  }catch(e){
    console.error("Failed to connect to voice room:",e);
    showWarning("Falha na conexão de voz");
  }
}

function startVoiceRecording(){
  if(!navigator.mediaDevices){
    console.log("Media devices not supported");
    return;
  }
  navigator.mediaDevices.getUserMedia({audio:true}).then(s=>{
    mediaRecorder=new MediaRecorder(s);
    audioChunks=[];
    mediaRecorder.ondataavailable=e=>{audioChunks.push(e.data);};
    mediaRecorder.onstop=()=>{const a=new Blob(audioChunks,{type:"audio/wav"});simulateVoiceTranscription();};
    mediaRecorder.start();
    setTimeout(()=>{
      if(mediaRecorder&&mediaRecorder.state==="recording"){
        mediaRecorder.stop();
        setTimeout(()=>{
          if(isVoiceMode){
            startVoiceRecording();
          }
        },1000);
      }
    },5000);
  }).catch(e=>{
    console.error("Error accessing microphone:",e);
    showWarning("Erro ao acessar microfone");
  });
}

function simulateVoiceTranscription(){
  const p=["Olá, como posso ajudá-lo hoje?","Entendo o que você está dizendo","Esse é um ponto interessante","Deixe-me pensar sobre isso","Posso ajudá-lo com isso","O que você gostaria de saber?","Isso parece ótimo","Estou ouvindo sua voz"],r=p[Math.floor(Math.random()*p.length)];
  if(voiceRoom){
    const m={type:"voice_input",content:r,timestamp:new Date().toISOString()};
    voiceRoom.localParticipant.publishData(new TextEncoder().encode(JSON.stringify(m)),LiveKitClient.DataPacketKind.RELIABLE);
  }
  addMessage("voice",`🎤 ${r}`);
}

function scrollToBottom(){
  messagesDiv.scrollTop=messagesDiv.scrollHeight;
  isUserScrolling=false;
  scrollToBottomBtn.classList.remove('visible');
}

window.addEventListener("load",initializeAuth);
window.addEventListener("focus",function(){
  if(!ws||ws.readyState!==WebSocket.OPEN){
    connectWebSocket();
  }
});