<?php
session_start();

// Configuration
$blockedNumbers = ['03281160852'];
$pakistaniPrefixes = ['0300','0301'];
$pakistaniNames = ['Ahmed','Ayesha'];

// Helper Functions
function isValidPakistaniNumber($number) {
    return preg_match('/^03\d{9}$/', $number);
}

function isBlocked($number, $blockedList) {
    return in_array($number, $blockedList);
}

function generateRandomNumber($prefixes, $exclude = '') {
    do {
        $prefix = $prefixes[array_rand($prefixes)];
        $number = $prefix . rand(1000000, 9999999);
    } while ($number === $exclude);
    return $number;
}

function generateCDR($number, $months, $names, $prefixes) {
    $records = [];
    $totalCalls = $months * 15;
    
    for ($i = 0; $i < $totalCalls; $i++) {
        $daysAgo = rand(1, $months * 30);
        $isCaller = rand(0, 1);
        $startTime = date('Y-m-d H:i:s', strtotime("-{$daysAgo} days"));
        
        $records[] = [
            'caller' => $isCaller ? $number : generateRandomNumber($prefixes, $number),
            'receiver' => $isCaller ? $names[array_rand($names)] : $number,
            'start_time' => $startTime,
            'duration' => rand(5, 300),
            'type' => $isCaller ? 'Outgoing' : 'Incoming'
        ];
    }
    
    usort($records, function($a, $b) {
        return strtotime($b['start_time']) - strtotime($a['start_time']);
    });
    
    return $records;
}

function formatDuration($seconds) {
    $mins = floor($seconds / 60);
    $secs = $seconds % 60;
    return sprintf('%d:%02d', $mins, $secs);
}

function calculateStats($records) {
    $incoming = count(array_filter($records, fn($r) => $r['type'] === 'Incoming'));
    $outgoing = count($records) - $incoming;
    $totalDuration = array_sum(array_column($records, 'duration'));
    $avgDuration = $totalDuration / count($records);
    
    return compact('incoming', 'outgoing', 'totalDuration', 'avgDuration');
}

// Process Form
$message = '';
$cdrData = [];
$showCDR = false;
$phoneNumber = '';
$availableMonths = 0;
$isBlocked = false;

if ($_POST) {
    $phoneNumber = trim($_POST['phone_number'] ?? '');
    $selectedMonths = (int)($_POST['months'] ?? 0);
    
    if (!isValidPakistaniNumber($phoneNumber)) {
        $message = ['text' => '❌ Invalid number format. Please enter a valid Pakistani mobile number (03XXXXXXXXX)', 'type' => 'error'];
    } elseif (isBlocked($phoneNumber, $blockedNumbers)) {
        $message = ['text' => '🛡️ Protected Number - CDR access restricted', 'type' => 'blocked'];
        $isBlocked = true;
    } else {
        if (!isset($_SESSION['checked_numbers'][$phoneNumber])) {
            // First time checking - set available months
            $availableMonths = [1, 6, 12][rand(0, 2)];
            $_SESSION['checked_numbers'][$phoneNumber] = $availableMonths;
            $message = ['text' => "✅ CDR available for {$availableMonths} month" . ($availableMonths > 1 ? 's' : '') . " for this number.", 'type' => 'success'];
        } else {
            // Number already checked - get available months
            $availableMonths = $_SESSION['checked_numbers'][$phoneNumber];
            
            if ($selectedMonths > 0) {
                // Generate CDR request
                if ($selectedMonths <= $availableMonths) {
                    $cdrData = generateCDR($phoneNumber, $selectedMonths, $pakistaniNames, $pakistaniPrefixes);
                    $showCDR = true;
                    $message = ['text' => "✅ CDR generated successfully for {$selectedMonths} month" . ($selectedMonths > 1 ? 's' : '') . ".", 'type' => 'success'];
                } else {
                    $message = ['text' => "❌ Only {$availableMonths} month" . ($availableMonths > 1 ? 's' : '') . " of CDR available for this number.", 'type' => 'error'];
                }
            }
        }
    }
}

// Get available months for display
if (!isset($_SESSION['checked_numbers'][$phoneNumber]) && $phoneNumber) {
    $availableMonths = 0;
} else if (isset($_SESSION['checked_numbers'][$phoneNumber])) {
    $availableMonths = $_SESSION['checked_numbers'][$phoneNumber];
}
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CDR - Call Data Record</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf-autotable/3.5.28/jspdf.plugin.autotable.min.js"></script>
    
    <style>
        * {
            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;
            overflow-x: hidden;
        }

        .background-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

        .background-animation::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"><animate attributeName="opacity" values="0;1;0" dur="3s" repeatCount="indefinite"/></circle><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.1)"><animate attributeName="opacity" values="0;1;0" dur="4s" repeatCount="indefinite" begin="1s"/></circle><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.1)"><animate attributeName="opacity" values="0;1;0" dur="2s" repeatCount="indefinite" begin="2s"/></circle></svg>');
            animation: float 20s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            animation: slideUp 0.8s ease-out;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .header {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            color: white;
            padding: 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
        }

        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .header p {
            font-size: 1.1rem;
            opacity: 0.9;
            position: relative;
            z-index: 1;
        }

        .main-content {
            padding: 40px;
        }

        .form-section {
            background: white;
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .form-section:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            color: #374151;
            margin-bottom: 8px;
            font-size: 1rem;
        }

        .input-wrapper {
            position: relative;
        }

        .form-control {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: #f9fafb;
        }

        .form-control:focus {
            outline: none;
            border-color: #4f46e5;
            background: white;
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
            transform: scale(1.02);
        }

        .btn {
            padding: 15px 30px;
            border: none;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            color: white;
        }

        .btn-success {
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            color: white;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }

        .btn:active {
            transform: translateY(0);
        }

        .status-message {
            padding: 20px;
            border-radius: 12px;
            margin: 20px 0;
            font-weight: 500;
            animation: fadeIn 0.5s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .status-success {
            background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
            color: #065f46;
            border: 1px solid #10b981;
        }

        .status-error {
            background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
            color: #991b1b;
            border: 1px solid #ef4444;
        }

        .status-blocked {
            background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
            color: #92400e;
            border: 2px solid #f59e0b;
            position: relative;
            overflow: hidden;
        }

        .status-blocked::before {
            content: '🛡️';
            position: absolute;
            top: 50%;
            left: -30px;
            transform: translateY(-50%);
            font-size: 3rem;
            opacity: 0.1;
            animation: slideIn 1s ease-out;
        }

        @keyframes slideIn {
            from { left: -50px; opacity: 0; }
            to { left: -30px; opacity: 0.1; }
        }

        .blocked-info {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            text-align: center;
            animation: slideUp 0.6s ease-out;
        }

        .blocked-icon {
            font-size: 4rem;
            color: #f59e0b;
            margin-bottom: 20px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }

        .blocked-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: #92400e;
            margin-bottom: 15px;
        }

        .blocked-message {
            font-size: 1.1rem;
            color: #78350f;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .blocked-contact {
            background: #fef3c7;
            padding: 20px;
            border-radius: 10px;
            border: 1px solid #f59e0b;
        }

        .cdr-section {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            animation: slideUp 0.6s ease-out;
        }

        .cdr-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 15px;
        }

        .cdr-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: #1f2937;
        }

        .table-container {
            overflow-x: auto;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .cdr-table {
            width: 100%;
            border-collapse: collapse;
            background: white;
        }

        .cdr-table th {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            color: white;
            padding: 15px;
            text-align: left;
            font-weight: 600;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .cdr-table td {
            padding: 15px;
            border-bottom: 1px solid #f3f4f6;
            transition: background-color 0.2s ease;
        }

        .cdr-table tr:hover td {
            background-color: #f8fafc;
        }

        .cdr-table tr:nth-child(even) {
            background-color: #f9fafb;
        }

        .type-badge {
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .type-incoming {
            background: #dbeafe;
            color: #1e40af;
        }

        .type-outgoing {
            background: #fef3c7;
            color: #92400e;
        }

        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255,255,255,.3);
            border-radius: 50%;
            border-top-color: #fff;
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .stat-card {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid #0284c7;
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: #0369a1;
        }

        .stat-label {
            color: #075985;
            font-weight: 500;
            margin-top: 5px;
        }

        @media (max-width: 768px) {
            .container {
                margin: 10px;
                border-radius: 15px;
            }
            
            .header {
                padding: 30px 20px;
            }
            
            .header h1 {
                font-size: 2rem;
            }
            
            .main-content {
                padding: 20px;
            }
            
            .cdr-header {
                flex-direction: column;
                align-items: stretch;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
    </style>
</head>
<body>
    <div class="background-animation"></div>
    
    <div class="container">
        <div class="header">
            <h1>📞 Get CDR</h1>
            <p>Get Call Data Records (CDRs) for All Numbers in the System</p>
        </div>

        <div class="main-content">
            <div class="form-section">
                <form method="POST" id="cdrForm">
                    <div class="form-group">
                        <label for="phone_number">Mobile Number</label>
                        <div class="input-wrapper">
                            <input type="text" name="phone_number" id="phone_number" class="form-control" 
                                   placeholder="Enter 11-digit number (03XXXXXXXXX)" 
                                   value="<?= htmlspecialchars($phoneNumber) ?>"
                                   pattern="03[0-9]{9}" maxlength="11" required>
                        </div>
                    </div>

                    <?php if ($availableMonths > 0 && !$isBlocked): ?>
                    <div class="form-group">
                        <label for="months">Select Time Range</label>
                        <select name="months" id="months" class="form-control" required>
                            <option value="">Select months</option>
                            <?php 
                            $monthOptions = [1, 6, 12];
                            foreach ($monthOptions as $month):
                                if ($month <= $availableMonths):
                            ?>
                                <option value="<?= $month ?>">Last <?= $month ?> Month<?= $month > 1 ? 's' : '' ?></option>
                            <?php 
                                endif;
                            endforeach; 
                            ?>
                        </select>
                    </div>
                    <?php endif; ?>

                    <button type="submit" class="btn btn-primary" id="submitBtn">
                        <span id="btnText">
                            <?= ($availableMonths > 0 && !$isBlocked) ? 'Generate CDR' : 'Check CDR Availability' ?>
                        </span>
                        <span id="btnLoading" class="loading" style="display: none;"></span>
                    </button>
                </form>

                <?php if ($message): ?>
                <div class="status-message status-<?= $message['type'] ?>">
                    <?= $message['text'] ?>
                </div>
                <?php endif; ?>
            </div>

            <?php if ($isBlocked): ?>
            <div class="blocked-info">
                <div class="blocked-icon">🛡️</div>
                <h2 class="blocked-title">Access Restricted</h2>
                <p class="blocked-message">
                    CDR records for the number <strong><?= htmlspecialchars($phoneNumber) ?></strong> cannot be accessed due to privacy restrictions or security policies.
                </p>
                <div class="blocked-contact">
                    <strong>📞 Contact Support:</strong><br>
                    For authorized access to restricted numbers, please contact our support team with proper documentation and legal authorization.
                </div>
            </div>
            <?php endif; ?>

            <?php if ($showCDR): ?>
                <?php $stats = calculateStats($cdrData); ?>
                
                <div class="cdr-section">
                    <div class="cdr-header">
                        <h2 class="cdr-title">CDR Records for <?= htmlspecialchars($phoneNumber) ?></h2>
                        <button class="btn btn-success" onclick="exportToPDF()">
                            📄 Export PDF
                        </button>
                    </div>
                    
                    <div class="stats-grid">
                        <div class="stat-card">
                            <div class="stat-value"><?= count($cdrData) ?></div>
                            <div class="stat-label">Total Calls</div>
                        </div>
                        <div class="stat-card">
                            <div class="stat-value"><?= $stats['incoming'] ?></div>
                            <div class="stat-label">Incoming</div>
                        </div>
                        <div class="stat-card">
                            <div class="stat-value"><?= $stats['outgoing'] ?></div>
                            <div class="stat-label">Outgoing</div>
                        </div>
                        <div class="stat-card">
                            <div class="stat-value"><?= formatDuration($stats['avgDuration']) ?></div>
                            <div class="stat-label">Avg Duration</div>
                        </div>
                    </div>

                    <div class="table-container">
                        <table class="cdr-table">
                            <thead>
                                <tr>
                                    <th>Caller</th>
                                    <th>Receiver</th>
                                    <th>Start Time</th>
                                    <th>Duration</th>
                                    <th>Type</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php foreach ($cdrData as $record): ?>
                                <tr>
                                    <td><?= htmlspecialchars($record['caller']) ?></td>
                                    <td><?= htmlspecialchars($record['receiver']) ?></td>
                                    <td><?= date('M j, Y g:i A', strtotime($record['start_time'])) ?></td>
                                    <td><?= formatDuration($record['duration']) ?></td>
                                    <td>
                                        <span class="type-badge type-<?= strtolower($record['type']) ?>">
                                            <?= $record['type'] ?>
                                        </span>
                                    </td>
                                </tr>
                                <?php endforeach; ?>
                            </tbody>
                        </table>
                    </div>
                </div>

                <script>
                    // Store CDR data for PDF export
                    const currentCDRData = <?= json_encode($cdrData) ?>;
                    const currentNumber = '<?= htmlspecialchars($phoneNumber) ?>';

                    function formatDuration(seconds) {
                        const mins = Math.floor(seconds / 60);
                        const secs = seconds % 60;
                        return `${mins}:${secs.toString().padStart(2, '0')}`;
                    }

                    function calculateStats(data) {
                        const incoming = data.filter(call => call.type === 'Incoming').length;
                        const outgoing = data.filter(call => call.type === 'Outgoing').length;
                        const totalDuration = data.reduce((sum, call) => sum + call.duration, 0);
                        const avgDuration = Math.round(totalDuration / data.length);

                        return { incoming, outgoing, totalDuration, avgDuration };
                    }

                    function exportToPDF() {
                        const { jsPDF } = window.jspdf;
                        const doc = new jsPDF();

                        // Add watermark background
                        doc.setTextColor(220, 220, 220);
                        doc.setFontSize(60);
                        doc.text('lwaportal.xyz', 105, 150, { 
                            angle: 45, 
                            align: 'center',
                            opacity: 0.1 
                        });

                        // Header
                        doc.setFontSize(20);
                        doc.setTextColor(79, 70, 229);
                        doc.text('Call Detail Records (CDR)', 14, 22);
                        
                        // Website branding
                        doc.setFontSize(10);
                        doc.setTextColor(100, 100, 100);
                        doc.text('Generated by: lwaportal.xyz', 14, 30);
                        
                        doc.setFontSize(12);
                        doc.setTextColor(0, 0, 0);
                        doc.text(`Mobile Number: ${currentNumber}`, 14, 40);
                        doc.text(`Generated on: ${new Date().toLocaleDateString()}`, 14, 48);

                        // Statistics
                        const stats = calculateStats(currentCDRData);
                        doc.text(`Total Calls: ${currentCDRData.length} | Incoming: ${stats.incoming} | Outgoing: ${stats.outgoing}`, 14, 58);

                        // Table
                        const tableData = currentCDRData.map(call => [
                            call.caller,
                            call.receiver,
                            call.start_time,
                            formatDuration(call.duration),
                            call.type
                        ]);

                        doc.autoTable({
                            head: [['Caller', 'Receiver', 'Start Time', 'Duration', 'Type']],
                            body: tableData,
                            startY: 68,
                            theme: 'grid',
                            headStyles: {
                                fillColor: [79, 70, 229],
                                textColor: 255,
                                fontSize: 10
                            },
                            bodyStyles: {
                                fontSize: 9
                            },
                            columnStyles: {
                                0: { cellWidth: 35 },
                                1: { cellWidth: 25 },
                                2: { cellWidth: 35 },
                                3: { cellWidth: 20 },
                                4: { cellWidth: 20 }
                            }
                        });

                        // Footer watermark
                        const pageHeight = doc.internal.pageSize.height;
                        doc.setFontSize(8);
                        doc.setTextColor(150, 150, 150);
                        doc.text('Report generated by lwaportal.xyz - Professional CDR Analysis', 14, pageHeight - 10);

                        // Add watermark on each page if multiple pages
                        const pageCount = doc.internal.getNumberOfPages();
                        for (let i = 1; i <= pageCount; i++) {
                            doc.setPage(i);
                            doc.setTextColor(220, 220, 220);
                            doc.setFontSize(60);
                            doc.text('lwaportal.xyz', 105, 150, { 
                                angle: 45, 
                                align: 'center' 
                            });
                        }

                        doc.save(`cdr_lwaportal.xyz_${currentNumber}_${new Date().toISOString().slice(0, 10)}.pdf`);
                    }
                </script>
            <?php endif; ?>
        </div>
    </div>

    <script>
        // Phone number formatting
        document.getElementById('phone_number').addEventListener('input', function(e) {
            let value = e.target.value.replace(/\D/g, '');
            if (value.length > 11) value = value.slice(0, 11);
            e.target.value = value;
        });

        // Form submission with loading state
        document.getElementById('cdrForm').addEventListener('submit', function(e) {
            const submitBtn = document.getElementById('submitBtn');
            const btnText = document.getElementById('btnText');
            const btnLoading = document.getElementById('btnLoading');
            
            btnText.style.display = 'none';
            btnLoading.style.display = 'inline-block';
            submitBtn.disabled = true;
            <?php
// Add this to your existing PHP code

// Initialize variables
$showMonthSelection = false;
$selectedMonths = 0;

// Handle form submission
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_POST['phone_number']) && !empty($_POST['phone_number'])) {
        $phoneNumber = trim($_POST['phone_number']);
        
        // Validate phone number
        if (preg_match('/^03\d{9}$/', $phoneNumber)) {
            
            // Check if this is month selection step
            if (isset($_POST['check_availability'])) {
                // Show month selection
                $showMonthSelection = true;
            }
            // Check if months are selected
            elseif (isset($_POST['months']) && !empty($_POST['months'])) {
                $selectedMonths = (int)$_POST['months'];
                // Generate CDR with selected months
                $showCDR = true;
                // Your existing CDR generation code here
            }
        }
    }
}
?>

<!-- Add this HTML where your form is -->

<script>
        // Updated JavaScript - Remove print functionality and update form handling
        document.getElementById('cdrForm').addEventListener('submit', function(e) {
            const submitBtn = document.getElementById('submitBtn');
            const btnText = document.getElementById('btnText');
            const btnLoading = document.getElementById('btnLoading');
            
            btnText.style.display = 'none';
            btnLoading.style.display = 'inline-block';
            submitBtn.disabled = true;
            
            // Re-enable after 3 seconds if no redirect happens
            setTimeout(() => {
                btnText.style.display = 'inline-block';
                btnLoading.style.display = 'none';
                submitBtn.disabled = false;
            }, 3000);
        });

        // Smooth scrolling for generated CDR
        <?php if ($showCDR): ?>
        document.addEventListener('DOMContentLoaded', function() {
            const cdrSection = document.querySelector('.cdr-section');
            if (cdrSection) {
                setTimeout(() => {
                    cdrSection.scrollIntoView({ 
                        behavior: 'smooth', 
                        block: 'start' 
                    });
                }, 500);
            }
        });
        <?php endif; ?>

        // Enhanced phone number validation
        document.getElementById('phone_number').addEventListener('blur', function(e) {
            const value = e.target.value;
            const isValid = /^03\d{9}$/.test(value);
            
            if (value && !isValid) {
                e.target.style.borderColor = '#ef4444';
                e.target.style.backgroundColor = '#fef2f2';
            } else {
                e.target.style.borderColor = '#e5e7eb';
                e.target.style.backgroundColor = '#f9fafb';
            }
        });

        // Auto-focus on phone number input
        document.addEventListener('DOMContentLoaded', function() {
            const phoneInput = document.getElementById('phone_number');
            if (phoneInput && !phoneInput.value) {
                phoneInput.focus();
            }
        });

        // Keyboard shortcuts
        document.addEventListener('keydown', function(e) {
            // Ctrl/Cmd + Enter to submit form
            if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') {
                e.preventDefault();
                document.getElementById('cdrForm').submit();
            }
            
            // Escape to clear form
            if (e.key === 'Escape') {
                const phoneInput = document.getElementById('phone_number');
                if (phoneInput.value) {
                    phoneInput.value = '';
                    phoneInput.focus();
                }
            }
        });

        // Table row click highlighting
        document.addEventListener('DOMContentLoaded', function() {
            const tableRows = document.querySelectorAll('.cdr-table tbody tr');
            tableRows.forEach(row => {
                row.addEventListener('click', function() {
                    // Remove previous highlights
                    tableRows.forEach(r => r.style.backgroundColor = '');
                    
                    // Highlight clicked row
                    this.style.backgroundColor = '#e0f2fe';
                    
                    // Remove highlight after 2 seconds
                    setTimeout(() => {
                        this.style.backgroundColor = '';
                    }, 2000);
                });
            });
        });

        // Loading animation for better UX
        function showLoading() {
            const overlay = document.createElement('div');
            overlay.id = 'loadingOverlay';
            overlay.style.cssText = `
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0,0,0,0.5);
                display: flex;
                justify-content: center;
                align-items: center;
                z-index: 9999;
            `;
            
            const spinner = document.createElement('div');
            spinner.style.cssText = `
                width: 50px;
                height: 50px;
                border: 5px solid #f3f3f3;
                border-top: 5px solid #4f46e5;
                border-radius: 50%;
                animation: spin 1s linear infinite;
            `;
            
            overlay.appendChild(spinner);
            document.body.appendChild(overlay);
        }

        function hideLoading() {
            const overlay = document.getElementById('loadingOverlay');
            if (overlay) {
                overlay.remove();
            }
        }

        // Enhanced form validation
        function validateForm() {
            const phoneNumber = document.getElementById('phone_number').value.trim();
            const phoneRegex = /^03\d{9}$/;
            
            if (!phoneNumber) {
                alert('Please enter a mobile number');
                return false;
            }
            
            if (!phoneRegex.test(phoneNumber)) {
                alert('Please enter a valid Pakistani mobile number (03XXXXXXXXX)');
                return false;
            }
            
            return true;
        }

        // Update form submission handler
        document.getElementById('cdrForm').addEventListener('submit', function(e) {
            if (!validateForm()) {
                e.preventDefault();
                return false;
            }
            
            const submitBtn = document.getElementById('submitBtn');
            const btnText = document.getElementById('btnText');
            const btnLoading = document.getElementById('btnLoading');
            
            btnText.style.display = 'none';
            btnLoading.style.display = 'inline-block';
            submitBtn.disabled = true;
            
            // Show loading overlay for better UX
            showLoading();
            
            // Re-enable after 3 seconds if no redirect happens
            setTimeout(() => {
                btnText.style.display = 'inline-block';
                btnLoading.style.display = 'none';
                submitBtn.disabled = false;
                hideLoading();
            }, 3000);
        });

        // Copy number to clipboard functionality
        function copyToClipboard(text) {
            if (navigator.clipboard) {
                navigator.clipboard.writeText(text).then(() => {
                    showNotification('Number copied to clipboard!');
                });
            } else {
                // Fallback for older browsers
                const textArea = document.createElement('textarea');
                textArea.value = text;
                document.body.appendChild(textArea);
                textArea.select();
                document.execCommand('copy');
                document.body.removeChild(textArea);
                showNotification('Number copied to clipboard!');
            }
        }

        function showNotification(message) {
            const notification = document.createElement('div');
            notification.style.cssText = `
                position: fixed;
                top: 20px;
                right: 20px;
                background: #10b981;
                color: white;
                padding: 15px 20px;
                border-radius: 8px;
                z-index: 10000;
                animation: slideIn 0.3s ease;
            `;
            notification.textContent = message;
            
            document.body.appendChild(notification);
            
            setTimeout(() => {
                notification.remove();
            }, 3000);
        }

        // Add click-to-copy functionality to phone numbers in table
        document.addEventListener('DOMContentLoaded', function() {
            const phoneNumbers = document.querySelectorAll('.cdr-table td:first-child, .cdr-table td:nth-child(2)');
            phoneNumbers.forEach(cell => {
                if (/^03\d{9}$/.test(cell.textContent.trim())) {
                    cell.style.cursor = 'pointer';
                    cell.title = 'Click to copy number';
                    cell.addEventListener('click', function() {
                        copyToClipboard(this.textContent.trim());
                    });
                }
            });
        });

        // Add hover effects for month selection buttons
        document.addEventListener('DOMContentLoaded', function() {
            const monthButtons = document.querySelectorAll('button[name="months"]');
            monthButtons.forEach(btn => {
                btn.addEventListener('mouseenter', function() {
                    this.style.background = '#3730a3';
                    this.style.transform = 'translateY(-2px)';
                });
                btn.addEventListener('mouseleave', function() {
                    this.style.background = '#4f46e5';
                    this.style.transform = 'translateY(0)';
                });
            });
        });
    </script>
           

           <?php if ($showMonthSelection): ?>
<div class="month-selection-section" style="background: #f8fafc; padding: 30px; text-align: center; border-top: 1px solid #e5e7eb;">
    <h3 style="color: #4f46e5; margin-bottom: 15px;">Select CDR Duration</h3>
    <p style="margin-bottom: 25px; color: #666;">How many months of CDR do you want for <strong><?php echo htmlspecialchars($phoneNumber); ?></strong>?</p>
    
    <form method="POST" style="display: inline-block;">
        <input type="hidden" name="phone_number" value="<?php echo htmlspecialchars($phoneNumber); ?>">
        
        <div style="display: flex; gap: 15px; justify-content: center; margin-bottom: 20px; flex-wrap: wrap;">
            <button type="submit" name="months" value="1" style="
                padding: 12px 24px;
                background: #4f46e5;
                color: white;
                border: none;
                border-radius: 8px;
                cursor: pointer;
                font-size: 16px;
                transition: all 0.3s;
                min-width: 100px;
            ">1 Month</button>
            
            <button type="submit" name="months" value="6" style="
                padding: 12px 24px;
                background: #4f46e5;
                color: white;
                border: none;
                border-radius: 8px;
                cursor: pointer;
                font-size: 16px;
                transition: all 0.3s;
                min-width: 100px;
            ">6 Months</button>
            
            <button type="submit" name="months" value="12" style="
                padding: 12px 24px;
                background: #4f46e5;
                color: white;
                border: none;
                border-radius: 8px;
                cursor: pointer;
                font-size: 16px;
                transition: all 0.3s;
                min-width: 100px;
            ">12 Months</button>
        </div>
        
        <button type="submit" name="cancel" style="
            padding: 8px 16px;
            background: #6b7280;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 14px;
        ">Cancel</button>
    </form>
</div>
<?php endif; ?>