✏ EDIT: invoice_view.php

<?php
// Admin invoice view page
session_start();
require_once __DIR__ . '/../includes/config.php';
require_once __DIR__ . '/../includes/functions.php';
check_admin();

// Fetch invoice by ID
$id = isset($_GET['id']) ? intval($_GET['id']) : 0;
if ($id <= 0) {
    redirect('manage_invoices.php');
}
$stmt = $conn->prepare("SELECT * FROM invoices WHERE id = ? LIMIT 1");
$stmt->bind_param('i', $id);
$stmt->execute();
$res = $stmt->get_result();
$invoice = $res ? $res->fetch_assoc() : null;
if (!$invoice) {
    redirect('manage_invoices.php');
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>View Invoice #<?php echo e($invoice['invoice_number']); ?> - Admin</title>
    <link rel="stylesheet" href="../assets/css/style.css">
    
    <link rel="stylesheet" href="../assets/fontawesome/fontawesome-all.min.css">
    <style>
    /* Style invoice view for printing */
    .invoice-details {
        background: #fff;
        border: 1px solid #e5eef7;
        padding: 20px;
        border-radius: 8px;
    }
    .invoice-details h2 {
        margin-top: 0;
        color: #1c5a8a;
    }
    .invoice-details p {
        margin: 6px 0;
        font-size: 16px;
    }
    @media print {
        /* Hide sidebar and buttons when printing */
        .admin-sidebar, .btn-print { display: none !important; }
        .admin-content { margin: 0; width: 100%; }
    }
    </style>
</head>
<body>
<div class="admin-wrapper">
    <div class="admin-sidebar">
        <h2>Admin Panel</h2>
        <span class="toggle-btn" onclick="toggleSidebar()"><i class="fas fa-bars"></i></span>
        <a href="dashboard.php"><i class="fas fa-tachometer-alt"></i><span class="label">Dashboard</span></a>
        <a href="manage_sliders.php"><i class="fas fa-sliders-h"></i><span class="label">Manage Sliders</span></a>
        <a href="manage_services.php"><i class="fas fa-cogs"></i><span class="label">Manage Services</span></a>
        <a href="manage_products.php"><i class="fas fa-box-open"></i><span class="label">Manage Products</span></a>
        <a href="manage_blogs.php"><i class="fas fa-blog"></i><span class="label">Manage Blogs</span></a>
        <a href="manage_gallery.php"><i class="fas fa-images"></i><span class="label">Manage Gallery</span></a>
        <a href="manage_clients.php"><i class="fas fa-users"></i><span class="label">Manage Clients</span></a>
        <a href="manage_appointments.php"><i class="fas fa-calendar-check"></i><span class="label">Appointments</span></a>
        <a href="manage_service_bookings.php"><i class="fas fa-tools"></i><span class="label">Service Bookings</span></a>
        <a href="manage_parts_bookings.php"><i class="fas fa-cubes"></i><span class="label">Parts Bookings</span></a>
        <a href="manage_enquiries.php"><i class="fas fa-envelope"></i><span class="label">Enquiries</span></a>
        <a href="manage_invoices.php" class="active"><i class="fas fa-file-invoice-dollar"></i><span class="label">Invoices</span></a>
        <a href="logout.php"><i class="fas fa-sign-out-alt"></i><span class="label">Logout</span></a>
    </div>
    <div class="admin-content">
        <h1>Invoice #<?php echo e($invoice['invoice_number']); ?></h1>
        <div class="invoice-details">
            <h2>Client: <?php echo e($invoice['client_name']); ?></h2>
            <p><strong>Date:</strong> <?php echo date('Y-m-d', strtotime($invoice['date'])); ?></p>
            <p><strong>Amount:</strong> ₹<?php echo number_format($invoice['amount'], 2); ?></p>
            <p><strong>Status:</strong> <?php echo e(ucfirst($invoice['status'])); ?></p>
            <?php if (!empty($invoice['details'])): ?>
            <p><strong>Details:</strong><br><?php echo nl2br(e($invoice['details'])); ?></p>
            <?php endif; ?>
        </div>
        <button class="btn-primary btn-print" onclick="window.print()" style="margin-top:20px;">Download PDF</button>
        <footer class="admin-footer">
            &copy; 2026 Blueswirlz Engineers & Consultants. All rights reserved.
        </footer>
    </div>
    </div>
<script>
// Sidebar toggle copied from dashboard for consistency
function toggleSidebar() {
    var sidebar = document.querySelector('.admin-sidebar');
    if (!sidebar) return;
    sidebar.classList.toggle('collapsed');
    if (sidebar.classList.contains('collapsed')) {
        localStorage.setItem('sidebarCollapsed', '1');
    } else {
        localStorage.removeItem('sidebarCollapsed');
    }
}
document.addEventListener('DOMContentLoaded', function() {
    var sidebar = document.querySelector('.admin-sidebar');
    if (sidebar && localStorage.getItem('sidebarCollapsed')) {
        sidebar.classList.add('collapsed');
    }
});
</script>
</body>
</html>

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