<?php
session_start();
include_once('../includes/config.php');
if (!isset($_SESSION['uid'])) {
    header('location:../logout.php');
    exit();
}

$startDate = isset($_GET['startDate']) && $_GET['startDate'] ? $_GET['startDate'] : date('Y-m-01');
$endDate = isset($_GET['endDate']) && $_GET['endDate'] ? $_GET['endDate'] : date('Y-m-t');
$customerId = isset($_GET['customerId']) ? trim($_GET['customerId']) : '';
$salesType = isset($_GET['salesType']) ? trim($_GET['salesType']) : '';
$hsnCode = isset($_GET['hsnCode']) ? trim($_GET['hsnCode']) : '';

// Get store settings
$storeSettingsQuery = "SELECT * FROM tblstore_settings WHERE StoreCode = 'ST0002' LIMIT 1";
$storeSettingsResult = mysqli_query($con, $storeSettingsQuery);
$storeSettings = null;

if ($storeSettingsResult && mysqli_num_rows($storeSettingsResult) > 0) {
    $storeSettings = mysqli_fetch_assoc($storeSettingsResult);
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Print | HSN Wise Sales Report</title>
    <style>
        :root {
            --primary-color: #1a1a1a;
            --success-color: #0d6e5f;
            --danger-color: #991b1b;
            --accent-color: #6f42c1;
            --border-color: #cbd5e0;
            --muted-text: #64748b;
            --background-color: #f8fafc;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Arial', 'Helvetica Neue', sans-serif;
            font-size: 10px;
            color: #1a1a1a;
            line-height: 1.3;
            background: #e2e8f0;
        }

        .print-container {
            max-width: 297mm;
            margin: 10px auto;
            padding: 15px;
            background: white;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        .print-controls {
            display: flex;
            justify-content: flex-end;
            gap: 6px;
            margin-bottom: 10px;
        }

        .print-controls button {
            padding: 5px 10px;
            border: 1px solid var(--border-color);
            background: white;
            color: var(--accent-color);
            border-radius: 3px;
            font-size: 11px;
            cursor: pointer;
            transition: all 0.2s;
        }

        .print-controls button:hover {
            background: var(--background-color);
        }

        .print-controls button.print {
            background: var(--accent-color);
            color: white;
            border-color: var(--accent-color);
        }

        .print-controls button.print:hover {
            background: #5a32a3;
        }

        .print-header {
            border-bottom: 2px solid var(--accent-color);
            padding-bottom: 8px;
            margin-bottom: 12px;
        }

        .header-layout {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
        }

        .company-section {
            flex: 1;
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .logo-container {
            flex-shrink: 0;
        }

        .logo-container img {
            width: 60px;
            height: 60px;
            object-fit: contain;
        }

        .company-info {
            flex: 1;
        }

        .company-name {
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--primary-color);
            text-transform: uppercase;
        }

        .company-details {
            font-size: 9px;
            color: var(--muted-text);
            margin-top: 2px;
            line-height: 1.5;
        }

        .report-info {
            text-align: right;
            flex: 0 0 auto;
        }

        .report-title {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-color);
            margin-bottom: 4px;
            text-transform: uppercase;
            letter-spacing: 0.3px;
        }

        .report-meta {
            font-size: 9px;
            color: var(--muted-text);
            line-height: 1.4;
        }

        .report-meta strong {
            color: var(--accent-color);
            font-weight: 600;
        }

        .summary-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 8px;
            margin-bottom: 10px;
        }

        .summary-card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 8px;
            -webkit-print-color-adjust: exact;
            print-color-adjust: exact;
        }

        .summary-card h3 {
            font-size: 8px;
            text-transform: uppercase;
            color: var(--muted-text);
            letter-spacing: 0.3px;
            margin-bottom: 4px;
            font-weight: 600;
        }

        .summary-card .amount {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary-color);
        }

        .summary-card.highlight {
            background: linear-gradient(135deg, #f3e8ff 0%, #e9d5ff 100%);
            border-color: var(--accent-color);
        }

        .summary-card.highlight .amount {
            color: var(--accent-color);
        }

        .hsn-info {
            font-size: 9px;
            color: var(--muted-text);
            margin-bottom: 6px;
            padding: 4px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .table-wrapper {
            page-break-inside: auto;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            font-size: 9px;
            border: 1px solid var(--primary-color);
        }

        thead {
            -webkit-print-color-adjust: exact;
            print-color-adjust: exact;
        }

        thead th {
            padding: 5px 6px;
            text-align: left;
            font-size: 8px;
            font-weight: 700;
            letter-spacing: 0.3px;
            text-transform: uppercase;
            background: var(--accent-color);
            color: white;
            border-right: 1px solid rgba(255,255,255,0.1);
        }

        thead th:last-child {
            border-right: none;
        }

        tbody td {
            padding: 4px 6px;
            border-bottom: 1px solid #e5e7eb;
            vertical-align: top;
        }

        tbody tr:nth-child(even) {
            background: #f9fafb;
        }

        tbody tr {
            page-break-inside: avoid;
        }

        .totals-section {
            page-break-inside: avoid;
            margin-top: 0;
        }

        tfoot {
            -webkit-print-color-adjust: exact;
            print-color-adjust: exact;
        }

        tfoot td {
            padding: 6px 8px;
            font-weight: 700;
            background: #e5e7eb;
            border-top: 2px solid var(--accent-color);
            font-size: 10px;
        }

        tfoot tr:last-child td {
            background: var(--accent-color);
            color: white;
            font-size: 11px;
            padding: 8px;
        }

        .text-right {
            text-align: right;
        }

        .text-center {
            text-align: center;
        }

        .hsn-code-cell {
            font-weight: 700;
            color: var(--accent-color);
        }

        .item-names-cell {
            font-size: 8px;
            color: var(--muted-text);
            max-width: 200px;
        }

        .amount-positive {
            color: var(--success-color);
            font-weight: 600;
        }

        .status-message {
            text-align: center;
            padding: 30px 0;
            color: var(--muted-text);
            font-size: 12px;
        }

        .no-print {
            display: block;
        }

        @media print {
            @page {
                size: A4 landscape;
                margin: 8mm;
            }

            * {
                -webkit-print-color-adjust: exact !important;
                print-color-adjust: exact !important;
                color-adjust: exact !important;
            }

            body {
                background: white;
                font-size: 9px;
            }

            .print-container {
                margin: 0;
                padding: 0;
                box-shadow: none;
                max-width: 100%;
            }

            .no-print {
                display: none !important;
            }

            .print-header {
                margin-bottom: 10px;
                padding-bottom: 6px;
            }

            .summary-grid {
                margin-bottom: 8px;
            }

            table {
                font-size: 8px;
            }

            thead th {
                font-size: 7px;
                padding: 4px 5px;
            }

            tbody td {
                padding: 3px 5px;
            }

            tfoot td {
                padding: 5px 6px;
                font-size: 9px;
            }

            tfoot tr:last-child td {
                font-size: 10px;
                padding: 6px;
            }

            .table-wrapper {
                display: block;
            }

            .totals-section {
                page-break-before: auto;
                page-break-inside: avoid;
                page-break-after: avoid;
            }

            tbody tr {
                page-break-inside: avoid;
            }
        }

        @media (max-width: 768px) {
            .summary-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
    </style>
</head>
<body>
    <div class="print-container">
        <div class="print-controls no-print">
            <button type="button" class="print" onclick="window.print()">🖨️ Print Report</button>
            <button type="button" onclick="window.close()">✕ Close</button>
        </div>

        <div id="loadingState" class="status-message">
            ⏳ Loading report data...
        </div>

        <div id="errorState" class="status-message" style="display: none; color: var(--danger-color);">
            ⚠️ Unable to load report. Please close this tab and try again.
        </div>

        <div id="reportContent" style="display: none;">
            <div class="print-header">
                <div class="header-layout">
                    <div class="company-section">
                        <?php if ($storeSettings && !empty($storeSettings['LogoPath'])): ?>
                        <div class="logo-container">
                            <img src="../<?php echo htmlspecialchars($storeSettings['LogoPath']); ?>" alt="Logo">
                        </div>
                        <?php endif; ?>
                        <div class="company-info">
                            <div class="company-name"><?php echo $storeSettings ? htmlspecialchars($storeSettings['StoreName']) : 'UZRS Inventory System'; ?></div>
                            <div class="company-details">
                                <?php if ($storeSettings): ?>
                                    <?php echo htmlspecialchars($storeSettings['Address']); ?><br>
                                    <?php if ($storeSettings['GSTNumber']): ?>GSTIN: <?php echo htmlspecialchars($storeSettings['GSTNumber']); ?><br><?php endif; ?>
                                    <?php if ($storeSettings['Mobile']): ?>Mobile: <?php echo htmlspecialchars($storeSettings['Mobile']); ?><?php endif; ?>
                                    <?php if ($storeSettings['Email']): ?> | Email: <?php echo htmlspecialchars($storeSettings['Email']); ?><?php endif; ?>
                                <?php endif; ?>
                            </div>
                        </div>
                    </div>
                    <div class="report-info">
                        <div class="report-title">HSN/SAC Wise Sales Report</div>
                        <div class="report-meta">
                            <strong>Period:</strong> <span id="reportPeriod">-</span><br>
                            <strong>Customer:</strong> <span id="reportCustomer">All Customers</span><br>
                            <strong>Sales Type:</strong> <span id="reportSalesType">All Types</span><br>
                            <strong>HSN Code:</strong> <span id="reportHSN">All Codes</span><br>
                            <strong>Generated:</strong> <span id="generatedDate">-</span>
                        </div>
                    </div>
                </div>
            </div>

            <div class="summary-grid">
                <div class="summary-card highlight">
                    <h3>Total Sales</h3>
                    <div class="amount" id="totalSales">₹0.00</div>
                </div>
                <div class="summary-card">
                    <h3>Taxable Amount</h3>
                    <div class="amount" id="taxableAmount">₹0.00</div>
                </div>
                <div class="summary-card">
                    <h3>Total CGST</h3>
                    <div class="amount" id="cgstAmount">₹0.00</div>
                </div>
                <div class="summary-card">
                    <h3>Total SGST</h3>
                    <div class="amount" id="sgstAmount">₹0.00</div>
                </div>
                <div class="summary-card">
                    <h3>Total IGST</h3>
                    <div class="amount" id="igstAmount">₹0.00</div>
                </div>
                <div class="summary-card highlight">
                    <h3>Total Tax</h3>
                    <div class="amount" id="totalTax">₹0.00</div>
                </div>
                <div class="summary-card">
                    <h3>Total Quantity</h3>
                    <div class="amount" id="totalQuantity">0</div>
                </div>
                <div class="summary-card">
                    <h3>HSN Codes</h3>
                    <div class="amount" id="hsnCount">0</div>
                </div>
            </div>

            <div class="hsn-info">
                <strong>HSN Code Count:</strong> <span id="hsnCodeCount">0</span> codes
            </div>

            <div class="table-wrapper">
                <table>
                    <thead>
                        <tr>
                            <th style="width: 4%;">S.No</th>
                            <th style="width: 10%;">HSN/SAC</th>
                            <th style="width: 22%;">Item Names</th>
                            <th style="width: 6%;" class="text-right">Trans.</th>
                            <th style="width: 8%;" class="text-right">Total Qty</th>
                            <th style="width: 10%;" class="text-right">Taxable</th>
                            <th style="width: 8%;" class="text-right">CGST</th>
                            <th style="width: 8%;" class="text-right">SGST</th>
                            <th style="width: 8%;" class="text-right">IGST</th>
                            <th style="width: 8%;" class="text-right">Tax</th>
                            <th style="width: 10%;" class="text-right">Total</th>
                        </tr>
                    </thead>
                    <tbody id="hsnBody">
                        <tr>
                            <td colspan="11" class="text-center" style="padding: 20px;">Loading...</td>
                        </tr>
                    </tbody>
                    <tfoot class="totals-section">
                        <tr>
                            <td colspan="4" class="text-right"><strong>TOTALS:</strong></td>
                            <td class="text-right" id="totalQtyFooter">0</td>
                            <td class="text-right" id="totalTaxableFooter">₹0.00</td>
                            <td class="text-right" id="totalCGSTFooter">₹0.00</td>
                            <td class="text-right" id="totalSGSTFooter">₹0.00</td>
                            <td class="text-right" id="totalIGSTFooter">₹0.00</td>
                            <td class="text-right" id="totalTaxFooter">₹0.00</td>
                            <td class="text-right" id="totalFinalFooter">₹0.00</td>
                        </tr>
                    </tfoot>
                </table>
            </div>
        </div>
    </div>

    <script>
        const PRINT_PARAMS = <?php echo json_encode([
            'startDate' => $startDate,
            'endDate' => $endDate,
            'customerId' => $customerId,
            'salesType' => $salesType,
            'hsnCode' => $hsnCode,
        ]); ?>;

        function formatCurrency(amount) {
            return '₹' + Number(amount || 0).toLocaleString('en-IN', {
                minimumFractionDigits: 2,
                maximumFractionDigits: 2
            });
        }

        function formatNumber(num) {
            return Number(num || 0).toLocaleString('en-IN', {
                minimumFractionDigits: 2,
                maximumFractionDigits: 2
            });
        }

        function formatDate(dateStr) {
            if (!dateStr) return '-';
            const date = new Date(dateStr);
            const day = String(date.getDate()).padStart(2, '0');
            const month = String(date.getMonth() + 1).padStart(2, '0');
            const year = String(date.getFullYear()).substr(2);
            return `${day}/${month}/${year}`;
        }

        function formatDateTime(date) {
            return date.toLocaleString('en-IN', {
                day: '2-digit',
                month: 'short',
                year: 'numeric',
                hour: '2-digit',
                minute: '2-digit'
            });
        }

        function loadPrintReport() {
            const { startDate, endDate, customerId, salesType, hsnCode } = PRINT_PARAMS;
            let apiUrl = `api/get-hsn-wise-sales.php?startDate=${startDate}&endDate=${endDate}`;
            
            if (customerId) {
                apiUrl += `&customerId=${encodeURIComponent(customerId)}`;
            }
            if (salesType) {
                apiUrl += `&salesType=${encodeURIComponent(salesType)}`;
            }
            if (hsnCode) {
                apiUrl += `&hsnCode=${encodeURIComponent(hsnCode)}`;
            }

            fetch(apiUrl)
                .then(response => response.json())
                .then(data => {
                    if (data.success) {
                        renderPrintReport(data);
                    } else {
                        document.getElementById('loadingState').style.display = 'none';
                        document.getElementById('errorState').style.display = 'block';
                    }
                })
                .catch(error => {
                    console.error('Error:', error);
                    document.getElementById('loadingState').style.display = 'none';
                    document.getElementById('errorState').style.display = 'block';
                });
        }

        function renderPrintReport(data) {
            const { summary, hsnData, startDate, endDate, customerInfo, salesTypeInfo } = data;

            document.getElementById('loadingState').style.display = 'none';
            document.getElementById('reportContent').style.display = 'block';

            const periodText = `${formatDate(startDate)} to ${formatDate(endDate)}`;
            document.getElementById('reportPeriod').textContent = periodText;
            
            if (customerInfo) {
                const customerLabel = customerInfo.City ? `${customerInfo.CustomerName} (${customerInfo.City})` : customerInfo.CustomerName;
                document.getElementById('reportCustomer').textContent = customerLabel;
            } else {
                document.getElementById('reportCustomer').textContent = 'All Customers';
            }
            
            if (salesTypeInfo) {
                document.getElementById('reportSalesType').textContent = salesTypeInfo;
            } else {
                document.getElementById('reportSalesType').textContent = 'All Types';
            }
            
            if (PRINT_PARAMS.hsnCode) {
                document.getElementById('reportHSN').textContent = PRINT_PARAMS.hsnCode;
            } else {
                document.getElementById('reportHSN').textContent = 'All Codes';
            }
            
            document.getElementById('generatedDate').textContent = formatDateTime(new Date());

            document.getElementById('totalSales').textContent = formatCurrency(summary.totalSales);
            document.getElementById('taxableAmount').textContent = formatCurrency(summary.taxableAmount);
            document.getElementById('cgstAmount').textContent = formatCurrency(summary.cgstAmount);
            document.getElementById('sgstAmount').textContent = formatCurrency(summary.sgstAmount);
            document.getElementById('igstAmount').textContent = formatCurrency(summary.igstAmount);
            document.getElementById('totalTax').textContent = formatCurrency(summary.totalTax);
            document.getElementById('totalQuantity').textContent = formatNumber(summary.totalQuantity);
            document.getElementById('hsnCount').textContent = summary.hsnCount;

            renderHSNTable(hsnData, summary);
        }

        function renderHSNTable(hsnData, summary) {
            const tbody = document.getElementById('hsnBody');

            document.getElementById('hsnCodeCount').textContent = hsnData.length;

            if (!hsnData.length) {
                tbody.innerHTML = '<tr><td colspan="11" class="text-center" style="padding: 20px;">No HSN data found for the selected period.</td></tr>';
            } else {
                let html = '';
                hsnData.forEach((row, index) => {
                    const itemNames = row.ItemNames || 'N/A';
                    const displayNames = itemNames.length > 80 ? itemNames.substring(0, 80) + '...' : itemNames;
                    
                    html += `
                        <tr>
                            <td class="text-center">${index + 1}</td>
                            <td class="hsn-code-cell">${row.HSNCode || 'NOT SPECIFIED'}</td>
                            <td class="item-names-cell">${displayNames}</td>
                            <td class="text-right">${row.TransactionCount || 0}</td>
                            <td class="text-right">${formatNumber(row.TotalQuantity)}</td>
                            <td class="text-right">${formatCurrency(row.TaxableAmount)}</td>
                            <td class="text-right">${formatCurrency(row.CGSTAmount)}</td>
                            <td class="text-right">${formatCurrency(row.SGSTAmount)}</td>
                            <td class="text-right">${formatCurrency(row.IGSTAmount)}</td>
                            <td class="text-right amount-positive">${formatCurrency(row.TotalTax)}</td>
                            <td class="text-right amount-positive"><strong>${formatCurrency(row.TotalAmount)}</strong></td>
                        </tr>
                    `;
                });
                tbody.innerHTML = html;
            }

            document.getElementById('totalQtyFooter').textContent = formatNumber(summary.totalQuantity);
            document.getElementById('totalTaxableFooter').textContent = formatCurrency(summary.taxableAmount);
            document.getElementById('totalCGSTFooter').textContent = formatCurrency(summary.cgstAmount);
            document.getElementById('totalSGSTFooter').textContent = formatCurrency(summary.sgstAmount);
            document.getElementById('totalIGSTFooter').textContent = formatCurrency(summary.igstAmount);
            document.getElementById('totalTaxFooter').textContent = formatCurrency(summary.totalTax);
            document.getElementById('totalFinalFooter').textContent = formatCurrency(summary.totalSales);
        }

        document.addEventListener('DOMContentLoaded', loadPrintReport);
    </script>
</body>
</html>
