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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>🇮🇳 TIRANGA - Advanced AI</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link href="https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@300;400;500;600;700&family=Geist+Mono:wght@400;500&display=swap" rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/marked/12.0.1/marked.min.js"></script>
<style>
/* --- BASE RESET & VARIABLES --- */
*{margin:0;padding:0;box-sizing:border-box;}
:root{
  --bg-color: #ffffff; --bg-secondary: #f9f9fb; --text-main: #1d1d1f; --text-muted: #86868b;
  --accent: #FF9933; --accent-green: #138808; --accent-hover: #e68a2e;
  --border-light: rgba(0, 0, 0, 0.08); --border-focus: rgba(255, 153, 51, 0.3);
  --glass-bg: rgba(255, 255, 255, 0.85); --glass-border: rgba(255, 255, 255, 0.4);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04); --shadow-md: 0 8px 32px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --font-serif: 'Instrument Serif', serif; --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'Geist Mono', monospace;
  --radius-lg: 24px; --radius-md: 16px; --radius-sm: 8px;
}
html,body{height:100%;overflow:hidden;background:var(--bg-color);color:var(--text-main);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;}

/* --- TIRANGA BACKGROUND --- */
.bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none;background: linear-gradient(135deg, rgba(255,153,51,0.05) 0%, rgba(255,255,255,1) 50%, rgba(19,136,8,0.05) 100%);}
.orb{position:absolute;border-radius:50%;filter:blur(100px);opacity:0.5;animation:drift 25s ease-in-out infinite alternate;}
.orb1{width:600px;height:600px;background:radial-gradient(circle,rgba(255,153,51,0.2),transparent 70%);top:-150px;left:-100px;}
.orb2{width:500px;height:500px;background:radial-gradient(circle,rgba(19,136,8,0.18),transparent 70%);bottom:-100px;right:-100px;animation-delay:-10s;}
@keyframes drift{0%{transform:translate(0,0) scale(1);}100%{transform:translate(60px,40px) scale(1.05);}}

/* --- MAIN LAYOUT (CHAT + WORKSPACE) --- */
.shell{position:relative;z-index:1;display:flex;height:100vh;width:100vw;overflow:hidden;}
.sidebar{width:280px;display:flex;flex-direction:column;background:var(--bg-secondary);border-right:1px solid var(--border-light);flex-shrink:0;}
.main-wrapper{flex:1;display:flex;position:relative;overflow:hidden;}
.chat-main{flex:1;display:flex;flex-direction:column;background:transparent;position:relative;min-width:300px;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);}
.workspace{width:0;background:#fafafa;border-left:1px solid var(--border-light);display:flex;flex-direction:column;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);overflow:hidden;box-shadow:-10px 0 30px rgba(0,0,0,0.02);}
.workspace.open{width:50%;}

/* --- SIDEBAR & BRANDING --- */
.logo-area{padding:24px 20px;border-bottom:1px solid var(--border-light);}
.logo-row{display:flex;align-items:center;gap:12px;}
.logo-img{width:44px;height:44px;border-radius:12px;object-fit:cover;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);background:#fff;}
.logo-text{line-height:1.2;}
.logo-name{font-family:var(--font-sans);font-weight:800;font-size:18px;color:var(--text-main);letter-spacing:-0.5px;}
.logo-sub{font-size:10px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--text-muted);}
.settings{padding:20px;flex:1;overflow-y:auto;display:flex;flex-direction:column;}
.settings::-webkit-scrollbar{width:4px;}
.settings::-webkit-scrollbar-thumb{background:rgba(0,0,0,0.1);border-radius:10px;}
.brand-box {background: #ffffff;border: 1px solid var(--border-light);border-radius: var(--radius-md);padding: 24px 16px;text-align: center;box-shadow: var(--shadow-sm);margin-top:20px;}
.brand-box img {width: 70px; height: 70px; border-radius: 16px; object-fit: cover; margin-bottom: 12px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);}
.brand-box h3 {font-family: var(--font-sans); font-size: 15px; font-weight: 700; color: var(--text-main); margin-bottom: 6px;}
.brand-box p {font-size: 10px; font-weight: 600; color: var(--accent-green); line-height: 1.4; letter-spacing: 0.5px;}
.clear-btn{width:100%;padding:12px;border-radius:var(--radius-sm);background:#ffffff;border:1px solid var(--border-light);color:var(--text-main);font-size:13px;font-weight:600;cursor:pointer;transition:all 0.2s;margin-top:auto;}
.clear-btn:hover{background:#fff0f0;color:#ff3b30;border-color:#ff3b30;}

/* --- CHAT AREA --- */
.chat-hdr{padding:14px 24px;border-bottom:1px solid var(--border-light);background:var(--glass-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);display:flex;align-items:center;justify-content:space-between;z-index:10;}
.model-badge{font-size:13px;font-weight:600;display:flex;align-items:center;gap:8px;}
.status-dot{width:8px;height:8px;border-radius:50%;background:#34c759;box-shadow:0 0 0 2px rgba(52,199,89,0.2);}
.messages{flex:1;overflow-y:auto;padding:30px 40px;display:flex;flex-direction:column;gap:24px;scroll-behavior:smooth;position:relative;}
.messages::-webkit-scrollbar{width:6px;}
.messages::-webkit-scrollbar-thumb{background:rgba(0,0,0,0.1);border-radius:10px;}

.welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px;margin:auto;animation:fadeIn 0.5s ease-out;width:100%;max-width:600px;}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}
.welcome-logo{width:80px;height:80px;border-radius:24px;object-fit:cover;box-shadow:var(--shadow-md);margin-bottom:24px;border:1px solid var(--border-light);}
.welcome-title{font-size:32px;font-weight:800;letter-spacing:-1px;margin-bottom:12px;}
.welcome-sub{font-size:15px;color:var(--text-muted);line-height:1.6;margin-bottom:32px;}

.msg{display:flex;gap:16px;animation:msgIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;max-width:85%;}
@keyframes msgIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}
.msg.user{flex-direction:row-reverse;align-self:flex-end;}
.msg.bot{align-self:flex-start;}
.avatar{width:36px;height:36px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;overflow:hidden;}
.msg.user .avatar{background:#f0f0f0;color:var(--text-main);border:1px solid var(--border-light);}
.msg.bot .avatar{border:1px solid var(--border-light);background:#fff;padding:2px;}
.msg.bot .avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover;}
.body{display:flex;flex-direction:column;gap:6px;max-width:100%;}
.msg.user .body{align-items:flex-end;}

.bubble{padding:16px 20px;font-size:15px;line-height:1.6;color:var(--text-main);position:relative;}
.msg.user .bubble{background:var(--text-main);color:#ffffff;border-radius:20px 20px 4px 20px;box-shadow:var(--shadow-sm);}
.msg.bot .bubble{background:#ffffff;border:1px solid var(--border-light);border-radius:4px 20px 20px 20px;box-shadow:var(--shadow-sm);width:100%;}

/* BOT ACTIONS (Copy Button below text) */
.msg-actions{display:flex;gap:8px;margin-top:4px;padding-left:12px;opacity:0;transition:opacity 0.2s;}
.msg.bot:hover .msg-actions{opacity:1;}
.action-btn{background:transparent;border:none;color:var(--text-muted);font-size:12px;cursor:pointer;display:flex;align-items:center;gap:4px;padding:4px 8px;border-radius:6px;transition:all 0.2s;}
.action-btn:hover{background:var(--bg-secondary);color:var(--text-main);}

/* Markdown inside bubble */
.bubble p{margin-bottom:12px;}
.bubble p:last-child{margin-bottom:0;}
.bubble code{font-family:var(--font-mono);background:rgba(0,0,0,0.05);padding:3px 6px;border-radius:6px;font-size:0.85em;color:#e83e8c;}
.msg.user .bubble code{background:rgba(255,255,255,0.2);color:#fff;}
.bubble img{max-width:100%;border-radius:12px;margin:10px 0;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);}

/* Generated Image Loader */
.img-loader {display:flex;align-items:center;gap:12px;padding:12px;background:rgba(255,153,51,0.1);border:1px solid rgba(255,153,51,0.3);border-radius:12px;color:var(--accent);font-weight:600;font-size:14px;margin-bottom:10px;}
.spinner {width:20px;height:20px;border:3px solid rgba(255,153,51,0.3);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* Workspace Trigger Card in Chat */
.ws-trigger-card {background: var(--bg-secondary);border: 1px solid var(--border-light);border-radius: 12px;padding: 16px;margin: 12px 0;display: flex;align-items: center;justify-content: space-between;}
.ws-trigger-info {display: flex;align-items: center;gap: 12px;}
.ws-trigger-icon {width: 40px;height: 40px;border-radius: 10px;background: #fff;display: flex;align-items: center;justify-content: center;font-size: 20px;box-shadow: var(--shadow-sm);border: 1px solid var(--border-light);}
.ws-trigger-text h4 {font-size: 14px;font-weight: 600;margin-bottom: 2px;}
.ws-trigger-text p {font-size: 12px;color: var(--text-muted);font-family: var(--font-mono);}
.ws-btn {padding: 8px 16px;background: var(--text-main);color: #fff;border: none;border-radius: 8px;font-size: 13px;font-weight: 500;cursor: pointer;transition: transform 0.2s;}
.ws-btn:hover {transform: scale(1.05);}

/* Typing indicator */
.typing{display:flex;align-items:center;gap:6px;padding:4px;}
.typing span{width:6px;height:6px;border-radius:50%;background:var(--text-muted);opacity:0.4;animation:bounce 1.4s infinite ease-in-out both;}
.typing span:nth-child(1){animation-delay:-0.32s;}.typing span:nth-child(2){animation-delay:-0.16s;}
@keyframes bounce{0%,80%,100%{transform:scale(0);}40%{transform:scale(1);}}

/* --- SCROLL TO BOTTOM BUTTON --- */
.scroll-bottom-btn {position:absolute;bottom:100px;right:40px;width:40px;height:40px;border-radius:50%;background:var(--glass-bg);backdrop-filter:blur(10px);border:1px solid var(--border-light);box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:18px;color:var(--text-main);opacity:0;pointer-events:none;transform:translateY(20px);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);z-index:20;}
.scroll-bottom-btn.show {opacity:1;pointer-events:auto;transform:translateY(0);}
.scroll-bottom-btn:hover {background:#fff;transform:translateY(-3px);}

/* --- INPUT AREA (WITH INTEGRATED ATTACHMENT) --- */
.input-container{padding:0 40px 30px;background:linear-gradient(to top, var(--bg-color) 70%, transparent);position:relative;z-index:20;}
.input-wrap{display:flex;flex-direction:column;background:var(--glass-bg);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:1px solid var(--border-light);border-radius:24px;box-shadow:var(--shadow-md);transition:box-shadow 0.3s, border-color 0.3s;}
.input-wrap:focus-within{border-color:var(--border-focus);box-shadow:0 12px 40px rgba(0,0,0,0.1), 0 0 0 3px rgba(255,153,51,0.1);}

/* Image Preview Inside Input */
.img-prev-inline{display:none;padding:12px 20px 0;align-items:center;gap:12px;}
.img-prev-inline.show{display:flex;animation:fadeIn 0.3s;}
.inline-th{width:40px;height:40px;object-fit:cover;border-radius:8px;border:1px solid var(--border-light);}
.inline-info{flex:1;}
.inline-nm{font-size:12px;font-weight:600;color:var(--text-main);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px;}
.inline-rm{background:rgba(0,0,0,0.05);border:none;width:24px;height:24px;border-radius:50%;cursor:pointer;font-size:10px;display:flex;align-items:center;justify-content:center;transition:background 0.2s;}
.inline-rm:hover{background:#ff3b30;color:#fff;}

.input-row{display:flex;align-items:flex-end;gap:12px;padding:10px 14px 10px 20px;}
.chat-ta{flex:1;border:none;outline:none;background:transparent;font-family:var(--font-sans);font-size:15px;color:var(--text-main);line-height:1.5;resize:none;max-height:200px;min-height:24px;padding:10px 0;}
.chat-ta::placeholder{color:var(--text-muted);}
.input-acts{display:flex;align-items:center;gap:8px;padding-bottom:6px;}

/* Modern Attachment Button */
.attach-btn{width:36px;height:36px;border-radius:12px;background:transparent;border:1px solid transparent;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-muted);transition:all 0.2s;position:relative;overflow:hidden;}
.attach-btn:hover{background:rgba(0,0,0,0.04);color:var(--text-main);}
.attach-btn input{position:absolute;inset:0;opacity:0;cursor:pointer;}
.attach-btn svg{width:20px;height:20px;}

/* Tiranga Gradient Send Button */
.send-btn{width:40px;height:40px;border-radius:14px;border:none;background:linear-gradient(135deg, #FF9933 0%, #ffffff 50%, #138808 100%);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.3s;box-shadow:0 4px 12px rgba(0,0,0,0.1);position:relative;}
.send-btn::before{content:'';position:absolute;inset:1px;background:#1d1d1f;border-radius:13px;transition:opacity 0.3s;} /* Dark inner to make icon pop, or keep gradient */
/* Let's make the arrow black on the gradient, no dark inner needed */
.send-btn::before{display:none;}
.send-btn svg{width:18px;height:18px;fill:#1d1d1f;z-index:1;transition:transform 0.2s;}
.send-btn:hover{box-shadow:0 6px 16px rgba(255,153,51,0.3);}
.send-btn:hover svg{transform:translate(2px, -2px);}
.send-btn:disabled{opacity:0.4;cursor:not-allowed;filter:grayscale(100%);}

.input-hint{text-align:center;font-size:11px;color:var(--text-muted);margin-top:12px;font-weight:500;}

/* --- WORKSPACE PANEL --- */
.ws-hdr{padding:14px 20px;border-bottom:1px solid var(--border-light);background:#fff;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;}
.ws-title{font-size:14px;font-weight:600;display:flex;align-items:center;gap:8px;}
.ws-actions{display:flex;gap:8px;}
.ws-icon-btn{width:32px;height:32px;border-radius:8px;background:#f5f5f7;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-main);transition:all 0.2s;font-size:13px;}
.ws-icon-btn:hover{background:#e5e5ea;}
.ws-close{background:transparent;color:var(--text-muted);}
.ws-close:hover{color:#ff3b30;}
.ws-content{flex:1;overflow-y:auto;background:#fafafa;padding:20px;}
.ws-content pre{margin:0;padding:20px;background:#fff;border:1px solid var(--border-light);border-radius:12px;font-family:var(--font-mono);font-size:14px;line-height:1.6;overflow-x:auto;box-shadow:var(--shadow-sm);}

/* --- RESPONSIVE MOBILE --- */
@media(max-width:850px){
  .sidebar{position:absolute;left:-280px;z-index:100;height:100%;transition:left 0.3s;}
  .sidebar.show{left:0;box-shadow:var(--shadow-lg);}
  .workspace.open{position:absolute;top:0;left:0;width:100%;height:100%;z-index:50;}
  .messages{padding:20px;}
  .input-container{padding:0 20px 20px;}
  .msg{max-width:95%;}
  .scroll-bottom-btn{right:20px;bottom:90px;}
}
</style>
</head>
<body>

<div class="bg">
  <div class="orb orb1"></div>
  <div class="orb orb2"></div>
</div>

<div class="shell">
  <!-- Sidebar -->
  <aside class="sidebar" id="sidebar">
    <div class="logo-area">
      <div class="logo-row">
        <img src="https://i.ibb.co/x8m7DbMk/TIRANGA-20260523-101648-0000.png" alt="Tiranga Logo" class="logo-img">
        <div class="logo-text">
          <div class="logo-name">TIRANGA</div>
          <div class="logo-sub">Workspace Edition</div>
        </div>
      </div>
    </div>
    <div class="settings">
      <div class="brand-box">
          <img src="https://i.ibb.co/x8m7DbMk/TIRANGA-20260523-101648-0000.png" alt="Tiranga Identity">
          <h3>TIRANGA</h3>
          <p>ALWAYS BE FORWARD NEVER BE BACKWARD!!</p>
      </div>
      <button class="clear-btn" onclick="clearMemory()">🗑️ Clear Chat Memory</button>
    </div>
  </aside>

  <!-- Main Chat Area -->
  <div class="main-wrapper">
    <main class="chat-main" id="chatMain">
      <header class="chat-hdr">
        <div class="model-badge">
          <div class="status-dot"></div>
          TIRANGA Intelligence
        </div>
      </header>

      <div class="messages" id="msgs" onscroll="checkScroll()">
        <!-- Welcome Screen -->
        <div class="welcome" id="welcome">
          <img src="https://i.ibb.co/x8m7DbMk/TIRANGA-20260523-101648-0000.png" alt="Tiranga Logo" class="welcome-logo">
          <div class="welcome-title">Hello There</div>
          <div class="welcome-sub"> I am TIRANGA. For your convenience, I have added new features like memory, workspace, and image generation. Tell me, what shall we create today?"</div>
        </div>
      </div>

      <!-- Scroll to bottom button -->
      <button class="scroll-bottom-btn" id="scrollBtn" onclick="forceScrollDown()">
        <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M12 5v14M19 12l-7 7-7-7"/></svg>
      </button>

      <!-- Input Area -->
      <div class="input-container">
        <div class="input-wrap">
          <!-- Inline Image Preview -->
          <div class="img-prev-inline" id="imgPrev">
            <img class="inline-th" id="imgThumb" src="">
            <div class="inline-info">
              <div class="inline-nm" id="imgName">image.png</div>
            </div>
            <button class="inline-rm" onclick="removeImg()">✕</button>
          </div>

          <div class="input-row">
            <button class="attach-btn" title="Upload Image">
              <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21.44 11.05l-9.19 9.19a6 6 0 0 1-8.49-8.49l9.19-9.19a4 4 0 0 1 5.66 5.66l-9.2 9.19a2 2 0 0 1-2.83-2.83l8.49-8.48"></path></svg>
              <input type="file" accept="image/*" onchange="handleFile(this)" id="fileInput">
            </button>
            <textarea class="chat-ta" id="chatInput" placeholder="Message TIRANGA..." rows="1" onkeydown="handleKey(event)" oninput="autoGrow(this)"></textarea>
            <button class="send-btn" id="sendBtn" onclick="sendMsg()">
              <svg viewBox="0 0 24 24"><path d="M2.01 21L23 12 2.01 3 2 10l15 2-15 2z"/></svg>
            </button>
          </div>
        </div>
        <div class="input-hint">TIRANGA is engineered for extreme performance. Verified by Divy Bhai.</div>
      </div>
    </main>

    <!-- Workspace Panel -->
    <aside class="workspace" id="workspace">
      <div class="ws-hdr">
        <div class="ws-title">
          <span id="wsLangIcon">💻</span>
          <span id="wsTitleText">Generated Code</span>
        </div>
        <div class="ws-actions">
          <button class="ws-icon-btn" onclick="copyWorkspaceCode()" title="Copy Code">📋</button>
          <button class="ws-icon-btn ws-close" onclick="closeWorkspace()" title="Close">✕</button>
        </div>
      </div>
      <div class="ws-content">
        <pre><code id="wsCodeBlock" class="hljs"></code></pre>
      </div>
    </aside>
  </div>
</div>

<script>
// --- STATE MANAGEMENT & MEMORY ---
const S = {
  history: [],
  pending: null,
  busy: false,
  isUserScrolling: false,
  currentCode: "" // Holds the code currently in workspace
};

// Load Memory on Boot
window.onload = () => {
  const saved = localStorage.getItem('tiranga_chat_memory');
  if(saved) {
    try {
      S.history = JSON.parse(saved);
      if(S.history.length > 0) {
        document.getElementById('welcome').style.display = 'none';
        S.history.forEach(msg => {
          if(msg.role === 'user') appendUserDOM(msg.content, msg.badge);
          else appendBotDOM(msg.content);
        });
      }
    } catch(e) { console.error("Memory load failed", e); }
  }
};

function saveMemory() {
  // Keep last 20 messages to prevent local storage overflow
  const memToSave = S.history.slice(-20);
  localStorage.setItem('tiranga_chat_memory', JSON.stringify(memToSave));
}

function clearMemory() {
  localStorage.removeItem('tiranga_chat_memory');
  S.history = [];
  document.getElementById('msgs').innerHTML = '';
  location.reload();
}

// --- FILE HANDLING ---
function handleFile(input){
  const f=input.files[0];if(!f)return;
  const r=new FileReader();
  r.onload=e=>{
    const base64Data = e.target.result.split(',')[1];
    S.pending={type: 'image', data: base64Data, name: f.name};
    document.getElementById('imgThumb').src = e.target.result;
    document.getElementById('imgName').textContent=f.name;
    document.getElementById('imgPrev').classList.add('show');
  };
  r.readAsDataURL(f);
}
function removeImg(){S.pending=null;document.getElementById('imgPrev').classList.remove('show');document.getElementById('fileInput').value='';}

// --- UI INTERACTIONS ---
function handleKey(e){if(e.key==='Enter'&&!e.shiftKey){e.preventDefault();sendMsg();}}
function autoGrow(el){el.style.height='auto';el.style.height=Math.min(el.scrollHeight,200)+'px';}

// Scroll Handling
function checkScroll() {
  const m = document.getElementById('msgs');
  // If user scrolls up more than 50px from bottom, show button
  const isAtBottom = Math.abs((m.scrollHeight - m.scrollTop) - m.clientHeight) < 50;
  S.isUserScrolling = !isAtBottom;
  
  const btn = document.getElementById('scrollBtn');
  if(S.isUserScrolling) btn.classList.add('show');
  else btn.classList.remove('show');
}
function forceScrollDown(){
  const m=document.getElementById('msgs');
  m.scrollTo({top: m.scrollHeight, behavior: 'smooth'});
  S.isUserScrolling = false;
}
function autoScroll() {
  if(!S.isUserScrolling) {
    const m=document.getElementById('msgs');
    m.scrollTop = m.scrollHeight;
  }
}

// --- COPY FUNCTIONALITY ---
function copyText(btn, text) {
  navigator.clipboard.writeText(text);
  const orig = btn.innerHTML;
  btn.innerHTML = "✓ Copied!";
  setTimeout(() => btn.innerHTML = orig, 2000);
}

// --- WORKSPACE LOGIC ---
function openWorkspace(encodedCode, lang) {
  const code = decodeURIComponent(encodedCode);
  S.currentCode = code;
  document.getElementById('wsTitleText').textContent = lang ? `Generated ${lang.toUpperCase()}` : "Generated Code";
  const codeBlock = document.getElementById('wsCodeBlock');
  codeBlock.className = `hljs language-${lang || 'plaintext'}`;
  codeBlock.textContent = code;
  hljs.highlightElement(codeBlock);
  
  document.getElementById('workspace').classList.add('open');
  // On mobile, close sidebar if open
  if(window.innerWidth <= 850) {
      document.getElementById('sidebar').classList.remove('show');
  }
}
function closeWorkspace() {
  document.getElementById('workspace').classList.remove('open');
}
function copyWorkspaceCode() {
  navigator.clipboard.writeText(S.currentCode);
  alert("Code Copied!"); // Native toast substitute
}

// --- IMAGE GENERATION INTERCEPTOR ---
function isImageRequest(text) {
  const t = text.toLowerCase();
  const keywords = ['image', 'photo', 'picture', 'draw', 'generate', 'create', 'तस्वीर', 'चित्र', 'फोटो', 'बनाओ', 'बना'];
  // Very basic intent check
  if((t.includes('create') || t.includes('generate') || t.includes('draw') || t.includes('बनाओ') || t.includes('बना')) && 
     (t.includes('image') || t.includes('photo') || t.includes('picture') || t.includes('तस्वीर') || t.includes('चित्र') || t.includes('फोटो'))) {
      return true;
  }
  return false;
}

async function handleImageGeneration(msg) {
  // Add User msg
  appendUserDOM(msg);
  S.history.push({role: 'user', content: msg});
  
  // Create Bot loader
  const botDiv = document.createElement('div');botDiv.className='msg bot';
  botDiv.innerHTML=`<div class="avatar"><img src="https://i.ibb.co/x8m7DbMk/TIRANGA-20260523-101648-0000.png"></div><div class="body"><div class="bubble"><div class="img-loader"><div class="spinner"></div> 🇮🇳 TIRANGA is creating your image...</div></div></div>`;
  document.getElementById('msgs').appendChild(botDiv);
  forceScrollDown();

  // Parse logic for Pollinations
  const models = ['flux', 'flux-realism', 'flux-anime', 'flux-3d'];
  let selectedModel = models[0]; // default
  const tl = msg.toLowerCase();
  if(tl.includes('real')) selectedModel = 'flux-realism';
  if(tl.includes('anime')) selectedModel = 'flux-anime';
  if(tl.includes('3d')) selectedModel = 'flux-3d';
  
  const seed = Math.floor(Math.random() * 100000);
  const prompt = encodeURIComponent(msg);
  const url = `https://image.pollinations.ai/prompt/${prompt}?seed=${seed}&model=${selectedModel}&width=1024&height=1024&nologo=true`;

  // Create Image element
  const img = new Image();
  img.src = url;
  img.onload = () => {
    // Replace loader with image
    botDiv.querySelector('.bubble').innerHTML = `<img src="${url}" alt="Generated Image"><p>Here is your image! (Model: ${selectedModel})</p>`;
    
    // Add to history
    const finalHTML = botDiv.querySelector('.bubble').innerHTML;
    S.history.push({role: 'bot', content: finalHTML, isRawHTML: true});
    saveMemory();
    forceScrollDown();
  };
  img.onerror = () => {
    botDiv.querySelector('.bubble').innerHTML = `<p>Sorry, I couldn't generate the image right now.</p>`;
    forceScrollDown();
  };
}

// --- MAIN CHAT LOGIC ---
async function sendMsg(){
  if(S.busy)return;
  const inp=document.getElementById('chatInput');
  const msg=inp.value.trim();if(!msg && !S.pending)return;
  inp.value='';inp.style.height='auto';
  
  // Image Generation Intercept
  if(!S.pending && isImageRequest(msg)) {
      handleImageGeneration(msg);
      return;
  }

  document.getElementById('sendBtn').disabled=true;
  S.busy=true;
  
  const w=document.getElementById('welcome');
  if(w)w.style.display='none';

  let attachments = [];
  let badge = null;
  if(S.pending) {
      attachments.push(S.pending);
      badge = '📎 '+S.pending.name;
      appendUserDOM(msg || '[Image Attached]', badge);
      S.history.push({role: 'user', content: msg || '[Image Attached]', badge: badge});
  } else {
      appendUserDOM(msg);
      S.history.push({role: 'user', content: msg});
  }
  removeImg();
  saveMemory();

  const botDiv = document.createElement('div');botDiv.className='msg bot';
  botDiv.innerHTML=`<div class="avatar"><img src="https://i.ibb.co/x8m7DbMk/TIRANGA-20260523-101648-0000.png"></div><div class="body"><div class="bubble"><div class="typing"><span></span><span></span><span></span></div></div></div>`;
  document.getElementById('msgs').appendChild(botDiv);
  forceScrollDown();

  const sysPrompt = "You are TIRANGA, a state-of-the-art AI assistant developed by Divy Patel at Vedika AI.  your default language is English. Be extremely respectful. Always show immense respect to India. Answer comprehensively.";
  
  const payload = {
      message: msg,
      attachments: attachments,
      system_prompt: sysPrompt,
      max_tokens: 4096,
      temperature: 0.6
  };

  try{
    const res = await fetch('/api/chat', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify(payload)
    });

    const reader = res.body.getReader();
    const decoder = new TextDecoder();
    let accumulatedText = "";

    while (true) {
        const { done, value } = await reader.read();
        if (done) break;
        
        const chunk = decoder.decode(value, {stream: true});
        const lines = chunk.split('\n');
        
        for (let line of lines) {
            if (line.startsWith('data: ')) {
                const dataStr = line.substring(6);
                if (dataStr.trim() === '[DONE]') continue;
                try {
                    const dataObj = JSON.parse(dataStr);
                    if (dataObj.choices && dataObj.choices[0].delta.content) {
                        accumulatedText += dataObj.choices[0].delta.content;
                        renderBotText(botDiv, accumulatedText);
                        autoScroll();
                    }
                } catch (e) { }
            }
        }
    }
    // Save to history after complete
    S.history.push({role: 'bot', content: accumulatedText});
    saveMemory();

  }catch(err){
    renderBotText(botDiv,`**Error:** सर्वर से संपर्क नहीं हो पाया। कृपया दोबारा प्रयास करें।`);
  }

  S.busy=false;
  document.getElementById('sendBtn').disabled=false;
  autoScroll();
}

// --- DOM INJECTION (For rendering history and live messages) ---
function appendUserDOM(text, badgeText){
  let bHtml = badgeText ? `<div style="font-size:11px;color:var(--accent);margin-bottom:4px;font-weight:600;">${esc(badgeText)}</div>` : '';
  const el=document.createElement('div');el.className='msg user';
  el.innerHTML=`<div class="avatar">U</div><div class="body">${bHtml}<div class="bubble">${esc(text)}</div></div>`;
  document.getElementById('msgs').appendChild(el);
}
function appendBotDOM(content) {
  const el=document.createElement('div');el.className='msg bot';
  // Check if content is raw HTML (from image generator)
  if(content.includes('<img src="https://image.pollinations')) {
      el.innerHTML=`<div class="avatar"><img src="https://i.ibb.co/x8m7DbMk/TIRANGA-20260523-101648-0000.png"></div><div class="body"><div class="bubble">${content}</div></div>`;
  } else {
      el.innerHTML=`<div class="avatar"><img src="https://i.ibb.co/x8m7DbMk/TIRANGA-20260523-101648-0000.png"></div><div class="body"><div class="bubble"></div></div>`;
      renderBotText(el, content);
  }
  document.getElementById('msgs').appendChild(el);
}

// Custom Markdown rendering to extract code for Workspace
function renderBotText(el, raw) {
  const b = el.querySelector('.bubble');
  
  // Custom parsing for code blocks to convert to Workspace Triggers
  let processText = raw;
  const codeBlockRegex = /```(\w*)\n([\s\S]*?)```/g;
  
  processText = processText.replace(codeBlockRegex, (match, lang, code) => {
      const encoded = encodeURIComponent(code).replace(/'/g, "%27");
      return `
      <div class="ws-trigger-card">
        <div class="ws-trigger-info">
          <div class="ws-trigger-icon">💻</div>
          <div class="ws-trigger-text">
            <h4>Code Generated</h4>
            <p>${lang || 'snippet'}</p>
          </div>
        </div>
        <button class="ws-btn" onclick="openWorkspace('${encoded}', '${lang}')">View in Workspace</button>
      </div>`;
  });

  const html = marked.parse(processText);
  
  // Adding the copy button below the bubble text
  const cleanRaw = raw.replace(/"/g, '&quot;').replace(/'/g, "\\'");
  const actionsHTML = `
    <div class="msg-actions">
      <button class="action-btn" onclick="copyText(this, \`${cleanRaw}\`)">
        <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path></svg>
        Copy
      </button>
    </div>
  `;
  
  b.innerHTML = html;
  
  // Append actions to the body (outside bubble)
  let actionsDiv = el.querySelector('.msg-actions');
  if(!actionsDiv) {
      const body = el.querySelector('.body');
      body.insertAdjacentHTML('beforeend', actionsHTML);
  }
}

function esc(t){return t.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');}
</script>
</body>
</html>