<?php
session_start();
header('Content-Type: text/html; charset=utf-8');

// Initialize JSON files
function initStats() {
    if (!file_exists('stats.json')) {
        $initialData = [
            'settings' => [
                'site_name' => 'My Website',
                'admin_password' => hash('sha256', 'admin123'),
                'timezone' => 'UTC'
            ],
            'visitors' => [],
            'pages' => []
        ];
        file_put_contents('stats.json', json_encode($initialData, JSON_PRETTY_PRINT));
    }
}

// Log visitor
function logVisitor($page = 'Home') {
    $ip = $_SERVER['REMOTE_ADDR'];
    $userAgent = $_SERVER['HTTP_USER_AGENT'];
    $referrer = $_SERVER['HTTP_REFERER'] ?? 'Direct';
    $timestamp = date('Y-m-d H:i:s');
    
    // Get geolocation
    $geo = getGeolocation($ip);
    
    $visitorData = [
        'ip' => $ip,
        'user_agent' => $userAgent,
        'referrer' => $referrer,
        'timestamp' => $timestamp,
        'page' => $page,
        'country' => $geo['country'] ?? 'Unknown',
        'city' => $geo['city'] ?? 'Unknown',
        'region' => $geo['region'] ?? 'Unknown'
    ];
    
    $stats = json_decode(file_get_contents('stats.json'), true);
    array_unshift($stats['visitors'], $visitorData);
    
    // Keep only last 1000 visitors
    $stats['visitors'] = array_slice($stats['visitors'], 0, 1000);
    
    // Update page visits
    if (!isset($stats['pages'][$page])) {
        $stats['pages'][$page] = 0;
    }
    $stats['pages'][$page]++;
    
    file_put_contents('stats.json', json_encode($stats, JSON_PRETTY_PRINT));
}

// Get IP geolocation
function getGeolocation($ip) {
    if ($ip === '127.0.0.1' || $ip === '::1') {
        return ['country' => 'Local', 'city' => 'Local', 'region' => 'Local'];
    }
    
    $url = "http://ip-api.com/json/{$ip}";
    $response = @file_get_contents($url);
    
    if ($response) {
        $data = json_decode($response, true);
        if ($data['status'] === 'success') {
            return [
                'country' => $data['country'],
                'city' => $data['city'],
                'region' => $data['regionName']
            ];
        }
    }
    
    return ['country' => 'Unknown', 'city' => 'Unknown', 'region' => 'Unknown'];
}

// Initialize and log current visit
initStats();
logVisitor('Stats Page');
$stats = json_decode(file_get_contents('stats.json'), true);
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Website Statistics</title>
    <style>
        :root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --success: #4cc9f0;
            --danger: #f72585;
            --warning: #f8961e;
            --info: #4895ef;
            --dark: #2b2d42;
            --light: #f8f9fa;
            --gray: #6c757d;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
        }
        
        .header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .header h1 {
            color: var(--dark);
            font-size: 2.5rem;
            margin-bottom: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .stat-card {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 25px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary);
            margin-bottom: 10px;
        }
        
        .stat-label {
            color: var(--gray);
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .dashboard {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }
        
        @media (max-width: 1024px) {
            .dashboard {
                grid-template-columns: 1fr;
            }
        }
        
        .panel {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .panel h2 {
            color: var(--dark);
            margin-bottom: 20px;
            font-size: 1.5rem;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 10px;
        }
        
        .visitor-list, .pages-list {
            max-height: 400px;
            overflow-y: auto;
        }
        
        .visitor-item, .page-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
            transition: background-color 0.3s ease;
        }
        
        .visitor-item:hover, .page-item:hover {
            background-color: rgba(67, 97, 238, 0.05);
            border-radius: 10px;
        }
        
        .visitor-info {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }
        
        .visitor-ip {
            font-weight: bold;
            color: var(--dark);
        }
        
        .visitor-location {
            font-size: 0.85rem;
            color: var(--gray);
        }
        
        .visitor-time {
            font-size: 0.8rem;
            color: var(--gray);
        }
        
        .page-name {
            flex-grow: 1;
        }
        
        .page-count {
            background: var(--primary);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: bold;
        }
        
        .admin-link {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 12px 30px;
            border-radius: 25px;
            text-decoration: none;
            font-weight: bold;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
        }
        
        .admin-link:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(67, 97, 238, 0.4);
        }
        
        .flag {
            font-size: 1.2rem;
            margin-right: 8px;
        }
        
        /* Scrollbar styling */
        ::-webkit-scrollbar {
            width: 6px;
        }
        
        ::-webkit-scrollbar-track {
            background: rgba(0, 0, 0, 0.1);
            border-radius: 10px;
        }
        
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }
        
        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary);
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="header">
            <h1>📊 Website Analytics</h1>
            <p>Real-time statistics and visitor insights</p>
        </div>
        
        <?php
        // Calculate statistics
        $totalVisitors = count($stats['visitors']);
        $today = date('Y-m-d');
        $dailyVisitors = array_filter($stats['visitors'], function($visitor) use ($today) {
            return strpos($visitor['timestamp'], $today) === 0;
        });
        $dailyCount = count($dailyVisitors);
        
        // Get unique visitors (by IP)
        $uniqueIPs = array_unique(array_column($stats['visitors'], 'ip'));
        $uniqueVisitors = count($uniqueIPs);
        
        // Get countries
        $countries = array_count_values(array_column($stats['visitors'], 'country'));
        $countryCount = count($countries);
        ?>
        
        <div class="stats-grid">
            <div class="stat-card">
                <div class="stat-number"><?php echo $totalVisitors; ?></div>
                <div class="stat-label">Total Visitors</div>
            </div>
            <div class="stat-card">
                <div class="stat-number"><?php echo $dailyCount; ?></div>
                <div class="stat-label">Today's Visitors</div>
            </div>
            <div class="stat-card">
                <div class="stat-number"><?php echo $uniqueVisitors; ?></div>
                <div class="stat-label">Unique Visitors</div>
            </div>
            <div class="stat-card">
                <div class="stat-number"><?php echo $countryCount; ?></div>
                <div class="stat-label">Countries</div>
            </div>
        </div>
        
        <div class="dashboard">
            <div class="panel">
                <h2>🌍 Last 100 Visitors</h2>
                <div class="visitor-list">
                    <?php
                    $recentVisitors = array_slice($stats['visitors'], 0, 100);
                    foreach ($recentVisitors as $visitor):
                    ?>
                    <div class="visitor-item">
                        <div class="visitor-info">
                            <div class="visitor-ip">
                                <span class="flag">📍</span>
                                <?php echo htmlspecialchars($visitor['ip']); ?>
                            </div>
                            <div class="visitor-location">
                                <?php echo htmlspecialchars($visitor['city'] . ', ' . $visitor['country']); ?>
                            </div>
                            <div class="visitor-time">
                                <?php echo htmlspecialchars($visitor['timestamp']); ?>
                            </div>
                        </div>
                    </div>
                    <?php endforeach; ?>
                </div>
            </div>
            
            <div class="panel">
                <h2>📈 Top 25 Pages</h2>
                <div class="pages-list">
                    <?php
                    if (!empty($stats['pages'])) {
                        arsort($stats['pages']);
                        $topPages = array_slice($stats['pages'], 0, 25, true);
                        foreach ($topPages as $page => $count):
                    ?>
                    <div class="page-item">
                        <div class="page-name"><?php echo htmlspecialchars($page); ?></div>
                        <div class="page-count"><?php echo $count; ?></div>
                    </div>
                    <?php
                        endforeach;
                    } else {
                        echo '<div class="page-item">No page visits recorded yet.</div>';
                    }
                    ?>
                </div>
            </div>
        </div>
        
        <div style="text-align: center; margin-top: 30px;">
            <a href="admin.php" class="admin-link">🔒 Admin Panel</a>
        </div>
    </div>
</body>
</html>