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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;z-index:30;}
.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);z-index:25;}
.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;gap: 20px;}
.settings::-webkit-scrollbar{width:4px;}
.settings::-webkit-scrollbar-thumb{background:rgba(0,0,0,0.1);border-radius:10px;}

/* Custom Toggle Switch for Thinking */
.toggle-wrapper {display: flex; align-items: center; justify-content: space-between; background: #fff; padding: 16px; border-radius: 12px; border: 1px solid var(--border-light); box-shadow: var(--shadow-sm);}
.toggle-label {font-size: 13px; font-weight: 600; color: var(--text-main); display: flex; align-items: center; gap: 8px;}
.toggle-label span {font-size: 11px; color: var(--text-muted); font-weight: 500; display: block; margin-top: 2px;}
.switch {position: relative; display: inline-block; width: 44px; height: 24px;}
.switch input {opacity: 0; width: 0; height: 0;}
.slider {position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #e5e5ea; transition: .4s; border-radius: 24px;}
.slider:before {position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background-color: white; transition: .4s; border-radius: 50%; box-shadow: 0 2px 4px rgba(0,0,0,0.2);}
input:checked + .slider {background-color: var(--accent-green);}
input:checked + .slider:before {transform: translateX(20px);}

.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:auto;}
.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;}
.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 Screen & Prompts */
.welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 20px;margin:auto;animation:fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;width:100%;max-width:650px;}
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px);}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;max-width: 500px;}
.ex-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;width:100%;}
.ex-card{background:var(--glass-bg);backdrop-filter:blur(10px);border:1px solid var(--border-light);border-radius:var(--radius-md);padding:16px;cursor:pointer;text-align:left;transition:all 0.2s;box-shadow:var(--shadow-sm);}
.ex-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--accent);}
.ex-title{font-size:13px;font-weight:600;color:var(--text-main);margin-bottom:4px;display:flex;align-items:center;gap:6px;}
.ex-desc{font-size:12px;color:var(--text-muted);line-height:1.4;}

/* Messages */
.msg{display:flex;gap:16px;animation:msgIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;max-width:85%;}
@keyframes msgIn{from{opacity:0;transform:translateY(15px) scale(0.96);}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%; 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;word-break:break-word;overflow-wrap:anywhere;}
.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:0.7;transition:opacity 0.2s;}
.msg.bot:hover .msg-actions{opacity:1;}
.action-btn{background:var(--bg-secondary);border:1px solid var(--border-light);color:var(--text-main);font-size:12px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:8px;transition:all 0.2s;}
.action-btn:hover{background:#e5e5ea;transform:translateY(-1px);}

/* Reasoning / Thinking Box */
.think-box {background: #fdfdfd;border: 1px solid var(--border-light);border-left: 4px solid var(--accent-green);border-radius: 8px;padding: 14px 16px;margin-bottom: 16px;font-family: var(--font-mono);font-size: 13.5px;color: var(--text-muted);line-height: 1.5;box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);}
.think-title {font-weight: 600; color: var(--text-main); margin-bottom: 8px; display: flex; align-items: center; gap: 6px; font-family: var(--font-sans);}
/* Controlled by body class */
body:not(.show-thinking) .think-box {display: none;}

/* 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);}
.bubble pre {display: none;} /* Native pre hidden since we override code blocks */

/* 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;box-shadow: inset 0 1px 2px rgba(255,255,255,0.5);}
.ws-trigger-info {display: flex;align-items: center;gap: 12px;}
.ws-trigger-icon {width: 44px;height: 44px;border-radius: 10px;background: #fff;display: flex;align-items: center;justify-content: center;font-size: 22px;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);text-transform: uppercase;}
.ws-btn {padding: 8px 16px;background: var(--text-main);color: #fff;border: none;border-radius: 8px;font-size: 13px;font-weight: 600;cursor: pointer;transition: all 0.2s;}
.ws-btn:hover {transform: scale(1.05); background: var(--accent);}

/* Typing & Cursor */
.blinking-cursor {display: inline-block; width: 8px; height: 16px; background: var(--accent); margin-left: 4px; animation: blink 1s step-end infinite; vertical-align: middle;}
@keyframes blink { 50% { opacity: 0; } }
.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 (Centered) --- */
.scroll-bottom-btn {position:absolute;bottom:120px;left:50%;width:44px;height:44px;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:translateX(-50%) 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:translateX(-50%) translateY(0);}
.scroll-bottom-btn:hover {background:#fff;transform:translateX(-50%) translateY(-3px);box-shadow:var(--shadow-lg);}

/* --- INPUT AREA --- */
.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);}

.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:12px 16px 12px 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:8px 0;}
.chat-ta::placeholder{color:var(--text-muted);}

/* Modern Attachment & Send */
.attach-btn{width:38px;height:38px;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;padding-bottom:4px;}
.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;}

.send-btn{width:42px;height:42px;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);}
.send-btn svg{width:18px;height:18px;fill:#1d1d1f;transition:transform 0.2s;}
.send-btn:hover{box-shadow:0 6px 16px rgba(255,153,51,0.3);transform:translateY(-1px);}
.send-btn:hover svg{transform:translate(2px, -2px);}
.send-btn:disabled{opacity:0.4;cursor:not-allowed;filter:grayscale(100%);transform:none;}

.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{padding:6px 12px;border-radius:8px;background:var(--bg-secondary);border:1px solid var(--border-light);cursor:pointer;display:flex;align-items:center;gap:6px;color:var(--text-main);transition:all 0.2s;font-size:12px;font-weight:600;}
.ws-icon-btn:hover{background:#e5e5ea;}
.ws-close{padding:6px;background:transparent;border-color:transparent;}
.ws-close:hover{color:#ff3b30;background:#fff0f0;}
.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{bottom:110px;}
}
</style>
</head>
<!-- Body controls the thinking visibility -->
<body class="show-thinking">

<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">Advanced Edition</div>
        </div>
      </div>
    </div>
    
    <div class="settings">
      <!-- Reasoning Toggle -->
      <div class="toggle-wrapper">
        <div class="toggle-label">
          🧠 Reasoning Mode
          <span>Show internal thinking</span>
        </div>
        <label class="switch">
          <input type="checkbox" id="thinkingToggle" checked onchange="toggleThinking(this)">
          <span class="slider"></span>
        </label>
      </div>

      <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">Welcome, Divy Patel!</div>
          <div class="welcome-sub">I am TIRANGA. I am equipped with advanced reasoning, workspace coding, and image generation. How can I assist you today?</div>
          
          <div class="ex-grid">
            <div class="ex-card" onclick="sendEx('Write a python script for a simple HTTP server. Provide the code.')">
              <div class="ex-title">💻 Code Generation</div>
              <div class="ex-desc">Generate secure, workspace-ready code</div>
            </div>
            <div class="ex-card" onclick="sendEx('Create an image of a futuristic Indian city with flying cars, highly detailed, 8k resolution.')">
              <div class="ex-title">🎨 Generate Images</div>
              <div class="ex-desc">Stunning visuals using Pollinations AI</div>
            </div>
          </div>
        </div>
      </div>

      <!-- Scroll to bottom button (Centered) -->
      <button class="scroll-bottom-btn" id="scrollBtn" onclick="forceScrollDown()">
        <svg width="22" height="22" 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">
          <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 Patel.</div>
      </div>
    </main>

    <!-- Workspace Panel -->
    <aside class="workspace" id="workspace">
      <div class="ws-hdr">
        <div class="ws-title">
          <span>💻</span>
          <span id="wsTitleText">Generated Code</span>
        </div>
        <div class="ws-actions">
          <button class="ws-icon-btn" onclick="copyWorkspaceCode()" id="wsCopyBtn">📋 Copy</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 ---
const S = {
  history: [],
  pending: null,
  busy: false,
  isUserScrolling: false,
  codeBlocks: [], // Securely stores raw code to prevent HTML escaping bugs
  currentWorkspaceId: null
};

function toggleThinking(el) {
  if(el.checked) document.body.classList.add('show-thinking');
  else document.body.classList.remove('show-thinking');
}

// Memory initialization
window.onload = () => {
  const saved = localStorage.getItem('tiranga_v3_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);
        });
        setTimeout(forceScrollDown, 100);
      }
    } catch(e) {}
  }
};

function saveMemory() {
  const memToSave = S.history.slice(-20);
  localStorage.setItem('tiranga_v3_memory', JSON.stringify(memToSave));
}
function clearMemory() {
  localStorage.removeItem('tiranga_v3_memory');
  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';}

function checkScroll() {
  const m = document.getElementById('msgs');
  // Show center button only if user scrolled UP more than 80px
  const isAtBottom = Math.abs((m.scrollHeight - m.scrollTop) - m.clientHeight) < 80;
  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;
  document.getElementById('scrollBtn').classList.remove('show');
}
function autoScroll() {
  if(!S.isUserScrolling) {
    const m=document.getElementById('msgs');
    m.scrollTop = m.scrollHeight;
  }
}

// --- COPY UTILS ---
function copyText(btn, text) {
  navigator.clipboard.writeText(text);
  const orig = btn.innerHTML;
  btn.innerHTML = "✓ Copied";
  setTimeout(() => btn.innerHTML = orig, 2000);
}
function copyWorkspaceCode() {
  if(S.currentWorkspaceId !== null) {
    navigator.clipboard.writeText(S.codeBlocks[S.currentWorkspaceId].code);
    const btn = document.getElementById('wsCopyBtn');
    const orig = btn.innerHTML;
    btn.innerHTML = "✓ Copied";
    setTimeout(() => btn.innerHTML = orig, 2000);
  }
}

// --- WORKSPACE LOGIC ---
function openWorkspace(id) {
  S.currentWorkspaceId = id;
  const block = S.codeBlocks[id];
  document.getElementById('wsTitleText').textContent = block.lang ? `Generated ${block.lang.toUpperCase()}` : "Generated Code";
  
  const codeBlock = document.getElementById('wsCodeBlock');
  codeBlock.className = `hljs language-${block.lang || 'plaintext'}`;
  codeBlock.textContent = block.code;
  hljs.highlightElement(codeBlock);
  
  document.getElementById('workspace').classList.add('open');
  if(window.innerWidth <= 850) { document.getElementById('sidebar').classList.remove('show'); }
}
function closeWorkspace() { document.getElementById('workspace').classList.remove('open'); }

// --- MARKED.JS CUSTOM RENDERER (Fixes the Workspace Bug Completely) ---
const renderer = new marked.Renderer();
renderer.code = function(token) {
  // Marked v12 might pass object or string based on usage. Safely extract.
  const codeText = typeof token === 'string' ? token : (token.text || '');
  const language = typeof token === 'string' ? arguments[1] : (token.lang || '');
  
  const id = S.codeBlocks.length;
  S.codeBlocks.push({ code: codeText, lang: language });
  
  // Return the Beautiful Trigger Card
  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>${language || 'Snippet'}</p>
        </div>
      </div>
      <button class="ws-btn" onclick="openWorkspace(${id})">View in Workspace</button>
    </div>
  `;
};
marked.use({ renderer });

// Custom Thinking Parser
function parseThinking(raw) {
    const thinkRegex = /<think>([\s\S]*?)(<\/think>|$)/gi;
    let text = raw;
    let thinkContent = '';
    text = text.replace(thinkRegex, (match, p1) => {
        thinkContent += p1;
        return ''; 
    });
    return { mainText: text.trim(), thinkText: thinkContent.trim() };
}

// --- 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';

  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();

  // Integrated Pollinations AI at Model Level (Using System Prompt constraints)
  const sysPrompt = `You are TIRANGA, a state-of-the-art AI assistant. Developed by Divy Patel.
  Always communicate respectfully.
  
  CRITICAL IMAGE GENERATION PROTOCOL:
  If the user asks to generate, create, or draw an image/photo, you MUST generate the image by responding with a markdown image tag using Pollinations AI.
  Format to use: ![TIRANGA is creating your image...](https://image.pollinations.ai/prompt/{URL_ENCODED_PROMPT}?width=1024&height=1024&nologo=true&model={MODEL})
  Available models for {MODEL}: flux, flux-realism, flux-anime, flux-3d.
  Choose the best model based on the prompt. Example: if user says anime, use flux-anime.
  Always include this markdown tag when image generation is requested.`;
  
  const payload = {
      message: msg,
      attachments: attachments,
      system_prompt: sysPrompt,
      max_tokens: 4096,
      temperature: 0.7
  };

  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, true);
                        autoScroll();
                    }
                } catch (e) { }
            }
        }
    }
    // Final Render without cursor
    renderBotText(botDiv, accumulatedText, false);
    
    // Save to history
    S.history.push({role: 'bot', content: accumulatedText});
    saveMemory();

  }catch(err){
    renderBotText(botDiv,`**Error:** Server communication failed.`, false);
  }

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

function sendEx(t){document.getElementById('chatInput').value=t;sendMsg();}

// --- DOM INJECTION ---
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';
  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>`;
  document.getElementById('msgs').appendChild(el);
  renderBotText(el, content, false);
}

// Render Markdown + Thinking Toggle + Actions
function renderBotText(el, raw, isStreaming) {
  const b = el.querySelector('.bubble');
  
  // 1. Separate Thinking and Main Text
  const { mainText, thinkText } = parseThinking(raw);
  
  // 2. Parse Markdown
  let html = '';
  
  // Attach Thinking block if exists
  if (thinkText) {
      html += `<div class="think-box"><div class="think-title">🧠 Reasoning Process</div>${esc(thinkText)}</div>`;
  }
  
  html += marked.parse(mainText);
  
  // Add Blinking Cursor if streaming
  if(isStreaming) {
      html += '<span class="blinking-cursor"></span>';
  }
  
  b.innerHTML = html;
  
  // 3. Add Copy Action Button below bubble (only once streaming is done or if it's history load)
  let actionsDiv = el.querySelector('.msg-actions');
  if(!isStreaming && !actionsDiv && mainText.trim().length > 0) {
      const cleanRaw = mainText.replace(/"/g, '&quot;').replace(/'/g, "\\'").replace(/\n/g, '\\n');
      const actionsHTML = `
        <div class="msg-actions">
          <button class="action-btn" onclick="copyText(this, \`${cleanRaw}\`)">
            <svg width="14" height="14" 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 Text
          </button>
        </div>
      `;
      el.querySelector('.body').insertAdjacentHTML('beforeend', actionsHTML);
  }
}

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