@php
    if (!function_exists('format_rs_custom')) {
        function format_rs_custom($amount) {
            if (empty($amount)) {
                return 'Rs.0.00';
            }
            if (strpos($amount, 'Rs.') !== false) {
                return $amount;
            }
            $clean = preg_replace('/[^0-9.]/', '', $amount);
            if (!is_numeric($clean)) {
                return 'Rs.0.00';
            }
            return 'Rs.' . number_format(floatval($clean), 2);
        }
    }

    $transaction = null;
    if (!empty($receipt_details->transaction_id)) {
        $transaction = \App\Transaction::with('contact')->find($receipt_details->transaction_id);
    } elseif (!empty($receipt_details->invoice_no)) {
        $transaction = \App\Transaction::with('contact')->where('invoice_no', $receipt_details->invoice_no)->first();
    }

    $customer_code = '';
    $customer_id_padded = '00000000';
    if ($transaction && $transaction->contact) {
        $customer_code = $transaction->contact->contact_id;
        $customer_id_padded = sprintf("%08d", $transaction->contact->id);
    }
    if (empty($customer_code)) {
        $customer_code = $receipt_details->customer_id ?? '';
    }

    $display_mobile = !empty($receipt_details->customer_mobile) ? $receipt_details->customer_mobile : '';
    $display_address = '';
    if ($transaction && $transaction->contact) {
        $contact = $transaction->contact;
        if (empty($display_mobile) && !empty($contact->mobile)) {
            $display_mobile = $contact->mobile;
        }
        
        $address_parts = [];
        if (!empty($contact->address_line_1)) $address_parts[] = $contact->address_line_1;
        if (!empty($contact->address_line_2)) $address_parts[] = $contact->address_line_2;
        if (!empty($contact->city)) $address_parts[] = $contact->city;
        
        if (!empty($address_parts)) {
            $display_address = implode(', ', array_filter($address_parts));
        }
    }
    if (empty($display_address) && !empty($receipt_details->customer_address)) {
        $display_address = strip_tags($receipt_details->customer_address);
    }

    // Header strings
    $business_name = 'Lewis Engineering';
    $business_address = !empty($receipt_details->address) ? strip_tags($receipt_details->address) : 'No.56, HEMAPALA MUNIDASA MAWATHA, WELIMADA. [T] 0572245974 [F] 0572245333';
    $business_tagline = !empty($receipt_details->sub_heading_line1) ? $receipt_details->sub_heading_line1 : 'QUILTY FURNITURES , LAMINATED, MDF, STEEL SHEET AND STEEL TUBE PRODUCTS';

    // Lines / chunking
    $raw_lines = $receipt_details->lines ?? [];
    $lines_array = is_array($raw_lines) ? $raw_lines : (is_object($raw_lines) && method_exists($raw_lines, 'toArray') ? $raw_lines->toArray() : (array)$raw_lines);
    $chunks = array_chunk($lines_array, 9);
    $total_pages = count($chunks);
    if ($total_pages == 0) {
        $chunks = [[]];
        $total_pages = 1;
    }

    // Calculations
    $total_qty = 0;
    $current_total = 0;
    $total_discount = 0;
    foreach ($lines_array as $line) {
        $qty_val = floatval(preg_replace('/[^0-9.]/', '', $line['quantity'] ?? '0'));
        $total_qty += $qty_val;

        $line_tot = floatval(preg_replace('/[^0-9.]/', '', $line['line_total'] ?? '0.00'));
        $current_total += $line_tot;

        $line_disc = floatval(preg_replace('/[^0-9.]/', '', $line['line_discount'] ?? $line['total_line_discount'] ?? '0.00'));
        $total_discount += $line_disc;
    }

    $bill_discount = floatval(preg_replace('/[^0-9.]/', '', $receipt_details->discount ?? '0.00'));
    $other_charges = floatval(preg_replace('/[^0-9.]/', '', $receipt_details->shipping_charges ?? '0.00'));
    $return_amount = 0;
    $f_balance = floatval(preg_replace('/[^0-9.]/', '', $receipt_details->previous_due ?? '0.00'));
    $final_balance = $current_total + $f_balance - $bill_discount + $other_charges - $return_amount;

    $credit_days = 0;
    $credit_limit_status = '';
    if ($transaction && $transaction->contact) {
        if ($transaction->contact->pay_term_type == 'days') {
            $credit_days = $transaction->contact->pay_term_number;
        }
        $credit_limit = $transaction->contact->credit_limit;
        if (!is_null($credit_limit) && $final_balance > $credit_limit) {
            $credit_limit_status = 'CREDI LIMTE EXCED';
        }
    }

    $invoice_time = '';
    if (!empty($receipt_details->invoice_date)) {
        try {
            $invoice_time = \Carbon\Carbon::parse($receipt_details->invoice_date)->format('H:i:s');
        } catch (\Exception $e) {
            $invoice_time = '';
        }
    }

    // Commission agent name — always fetch directly regardless of layout setting
    $commission_agent_name = '';
    if (!empty($receipt_details->commission_agent)) {
        $commission_agent_name = strtoupper($receipt_details->commission_agent);
    } elseif ($transaction && !empty($transaction->sale_commission_agent)) {
        $commission_agent_name = strtoupper($transaction->sale_commission_agent->user_full_name ?? '');
    }

    // Amount in words - always generate from final_balance
    $amount_in_words = '';
    if (!empty($receipt_details->total_in_words)) {
        $amount_in_words = strtoupper($receipt_details->total_in_words);
    } elseif (extension_loaded('intl')) {
        try {
            $fmt = new \NumberFormatter('en', \NumberFormatter::SPELLOUT);
            $amount_in_words = strtoupper($fmt->format($final_balance)) . ' ONLY';
        } catch (\Exception $e) {
            $amount_in_words = '';
        }
    }
@endphp

<style>
    @media print {
        @page {
            size: 216mm 276mm;
            margin: 0;
        }
        
        body, html { 
            margin: 0 !important; 
            padding: 0 !important; 
            width: 216mm;
            height: 276mm;
            overflow: hidden !important;
        }

        .print_section, #receipt_section, .invoice, .wrapper, .modal, .modal-dialog, .modal-content, .modal-body {
            position: static !important;
            height: auto !important;
            max-height: none !important;
            overflow: visible !important;
            margin: 0 !important;
            padding: 0 !important;
            border: none !important;
        }
        
        .print_section, #receipt_section {
            display: block !important;
        }
    }

    .canvas {
        width: 216mm;
        height: 276mm;
        box-sizing: border-box;
        position: relative;
        page-break-after: always;
        page-break-inside: avoid;
        display: block;
        background-color: #fff;
        font-family: 'Courier New', Courier, monospace;
        font-size: 13px;
        color: #000;
        line-height: 1.35;
    }

    .canvas:last-child {
        page-break-after: auto;
    }

    .canvas-inner {
        position: absolute;
        top: 10mm;
        left: 10mm;
        right: 10mm;
        bottom: 10mm;
        box-sizing: border-box;
    }

    .business-header {
        text-align: center;
        margin-bottom: 10px;
    }
    .business-name {
        font-size: 18px;
        font-weight: bold;
        letter-spacing: 0.5px;
    }
    .business-address {
        font-size: 11px;
        margin-top: 1px;
    }
    .business-tagline {
        font-size: 10px;
        margin-top: 1px;
        font-weight: bold;
    }

    .meta-grid {
        display: flex;
        justify-content: space-between;
        margin-top: 5px;
        margin-bottom: 5px;
    }
    .meta-col-left {
        width: 45%;
        text-align: left;
    }
    .meta-col-center {
        width: 25%;
        text-align: center;
    }
    .meta-col-right {
        width: 30%;
        text-align: right;
    }
    .invoice-heading {
        font-size: 16px;
        font-weight: bold;
    }
    .customer-id-padded {
        font-size: 13px;
        margin-top: 1px;
    }

    table.items-table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 5px;
    }
    table.items-table th, table.items-table td {
        padding: 4px 2px;
        vertical-align: top;
    }
    table.items-table th {
        font-weight: bold;
        text-align: left;
    }

    .dashed-border-top {
        border-top: 1px dashed #000;
    }
    .dashed-border-bottom {
        border-bottom: 1px dashed #000;
    }

    .col-code { width: 15%; text-align: left; }
    .col-desc { width: 45%; text-align: left; }
    .col-qty { width: 8%; text-align: center; }
    .col-price { width: 11%; text-align: right; }
    .col-discount { width: 10%; text-align: right; }
    .col-amount { width: 11%; text-align: right; }

    .totals-section {
        display: flex;
        justify-content: space-between;
        margin-top: 10px;
    }
    .totals-left {
        width: 50%;
        text-align: left;
    }
    .totals-right {
        width: 45%;
    }
    table.totals-table {
        width: 100%;
        border-collapse: collapse;
    }
    table.totals-table td {
        padding: 2px 0;
    }
    .tot-label {
        width: 45%;
        text-align: left;
    }
    .tot-val-mid {
        width: 25%;
        text-align: right;
        padding-right: 10px;
    }
    .tot-val-end {
        width: 30%;
        text-align: right;
    }

    .boxed-pay-text {
        border: 1px solid #000;
        padding: 2px 8px;
        font-weight: bold;
        display: inline-block;
        font-size: 12px;
        margin-top: 5px;
    }

    .signatures-bottom {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
    }

    .sig-row-4 {
        display: flex;
        justify-content: space-between;
        text-align: center;
        margin-bottom: 25px;
    }
    .sig-row-4 > div {
        width: 22%;
    }
    .sig-line-dotted {
        border-top: 1px dotted #000;
        margin-bottom: 5px;
        width: 100%;
    }

    .confirm-text {
        text-align: center;
        font-size: 13px;
        font-weight: bold;
        margin-bottom: 25px;
    }

    .sig-row-2 {
        display: flex;
        justify-content: space-between;
        text-align: center;
    }
    .sig-row-2 > div {
        width: 30%;
    }
</style>

@foreach($chunks as $page_index => $chunk)
<div class="canvas">
    <div class="canvas-inner">
        <!-- Business Header -->
        <div class="business-header">
            <div class="business-name">{{ $business_name }}</div>
            <div class="business-address">{{ $business_address }}</div>
            <div class="business-tagline">{{ $business_tagline }}</div>
        </div>

        <!-- Meta Section (Dashed top/bottom) -->
        <div class="dashed-border-top"></div>
        <div class="meta-grid">
            <div class="meta-col-left">
                <div><strong>CUSTOMER CODE :-</strong> {{ $customer_code }}</div>
                <div style="font-weight: bold; margin-top: 2px;">{{ strtoupper($receipt_details->customer_name ?? '') }}</div>
                <div style="margin-top: 2px;">{{ strtoupper($display_address) }}</div>
            </div>
            <div class="meta-col-center">
                <div class="invoice-heading">SALES INVOICE</div>
                <div class="customer-id-padded">{{ $customer_id_padded }}</div>
            </div>
            <div class="meta-col-right">
                <div><strong>Invoice No</strong> {{ $receipt_details->invoice_no }}</div>
                <div style="margin-top: 2px;"><strong>Date</strong> {{ !empty($receipt_details->invoice_date) ? explode(' ', $receipt_details->invoice_date)[0] : '' }}</div>
                @if(!empty($commission_agent_name))
                    <div style="margin-top: 2px; font-weight: bold;">{{ $commission_agent_name }}</div>
                @elseif(!empty($receipt_details->sales_person))
                    <div style="margin-top: 2px;">{{ strtoupper($receipt_details->sales_person) }}</div>
                @endif
            </div>
        </div>
        <div class="dashed-border-bottom"></div>

        <!-- Items Table -->
        <table class="items-table">
            <thead>
                <tr class="dashed-border-bottom">
                    <th class="col-code">Code</th>
                    <th class="col-desc">Description</th>
                    <th class="col-qty">Qty</th>
                    <th class="col-price">Unit Price</th>
                    <th class="col-discount">Discount</th>
                    <th class="col-amount">Amount</th>
                </tr>
            </thead>
            <tbody>
                @foreach($chunk as $line)
                <tr>
                    <td class="col-code">{{ $line['sub_sku'] ?? '' }}</td>
                    <td class="col-desc">
                        {{ $line['name'] }}
                        @if(!empty($line['variation']) && $line['variation'] != 'Default')
                            {{ $line['variation'] }}
                        @endif
                        @if(!empty($line['is_free_promo_item']) || (isset($line['unit_price_uf']) && $line['unit_price_uf'] == 0))
                            <span class="label label-success" style="font-size: 10px; padding: 1px 4px; vertical-align: middle; background-color: #5cb85c; color: white; border-radius: 2px; font-weight: bold; margin-left: 4px;">🎁 FREE</span>
                        @endif
                    </td>
                    <td class="col-qty">{{ number_format(floatval(preg_replace('/[^0-9.]/', '', $line['quantity'] ?? '0')), 0) }}</td>
                    <td class="col-price">{{ format_rs_custom($line['unit_price_before_discount'] ?? $line['unit_price'] ?? 0) }}</td>
                    <td class="col-discount">{{ format_rs_custom($line['line_discount'] ?? $line['total_line_discount'] ?? 0) }}</td>
                    <td class="col-amount">{{ format_rs_custom($line['line_total'] ?? 0) }}</td>
                </tr>
                @endforeach
            </tbody>
        </table>
        <div class="dashed-border-top" style="margin-top: 5px;"></div>

        <!-- Summary & Bottom Sections (Only on last page) -->
        @if($page_index == $total_pages - 1)
            <div class="totals-section">
                <!-- Left totals side -->
                <div class="totals-left">
                    <div style="display: flex; gap: 20px;">
                        <div><strong>CREDIT DAYS</strong> {{ $credit_days }}</div>
                        <div style="font-weight: bold; color: #000;">{{ $credit_limit_status }}</div>
                    </div>
                    
                    <div style="margin-top: 20px;">
                        Authorized by_______________________
                    </div>
                    
                    <div style="margin-top: 15px;">
                        Customer Signature__________________
                    </div>
                    
                    <div style="margin-top: 10px;">
                        <span class="boxed-pay-text">* PLEASE PAY THIS AMOUNT</span>
                    </div>
                </div>

                <!-- Right totals side -->
                <div class="totals-right">
                    <table class="totals-table">
                        <tr>
                            <td class="tot-label"><strong>Current Total</strong></td>
                            <td class="tot-val-mid">{{ format_rs_custom($total_discount) }}</td>
                            <td class="tot-val-end">{{ format_rs_custom($current_total) }}</td>
                        </tr>
                        <tr>
                            <td class="tot-label">Bill Di. (-)</td>
                            <td class="tot-val-mid"></td>
                            <td class="tot-val-end">{{ format_rs_custom($bill_discount) }}</td>
                        </tr>
                        <tr>
                            <td class="tot-label">Other Ch. (+)</td>
                            <td class="tot-val-mid"></td>
                            <td class="tot-val-end">{{ format_rs_custom($other_charges) }}</td>
                        </tr>
                        <tr>
                            <td class="tot-label">Return (-)</td>
                            <td class="tot-val-mid"></td>
                            <td class="tot-val-end">{{ format_rs_custom($return_amount) }}</td>
                        </tr>
                        <tr>
                            <td class="tot-label"><strong>F/Balance</strong></td>
                            <td class="tot-val-mid"></td>
                            <td class="tot-val-end"><strong>{{ number_format($f_balance, 2) }}</strong></td>
                        </tr>
                        <tr class="dashed-border-top">
                            <td class="tot-label"><strong>Final Balance</strong></td>
                            <td class="tot-val-mid"></td>
                            <td class="tot-val-end"><strong>{{ number_format($final_balance, 2) }}</strong></td>
                        </tr>
                    </table>
                </div>
            </div>

            <!-- Number of Items & Words Section -->
            <div class="dashed-border-top" style="margin-top: 10px; padding-top: 5px;">
                <div style="display: flex; justify-content: space-between;">
                    <div><strong>Number of Items</strong> &nbsp;&nbsp;&nbsp;&nbsp; {{ count($lines_array) }}</div>
                    <div style="margin-right: 20%;"><strong>Number of Qty</strong> &nbsp;&nbsp;&nbsp;&nbsp; {{ number_format($total_qty, 0) }}</div>
                </div>
                <div style="margin-top: 5px;">
                    <strong>Amount In Words</strong> &nbsp;&nbsp;&nbsp;&nbsp; {{ $amount_in_words }}
                </div>
            </div>

            <!-- Disclaimer Declaration -->
            <div class="dashed-border-bottom" style="margin-top: 8px; padding-bottom: 8px; font-size: 11px; text-align: center;">
                We declare that this Invoice shows the actual price of the goods described and that all particulars are true and correct
            </div>

            <!-- Signature block from handwriting guide -->
            <div class="signatures-bottom">
                <!-- Prepared, Checked, Supervisor, Security -->
                <div class="sig-row-4">
                    <div>
                        <div class="sig-line-dotted"></div>
                        Prepared
                    </div>
                    <div>
                        <div class="sig-line-dotted"></div>
                        Checked
                    </div>
                    <div>
                        <div class="sig-line-dotted"></div>
                        Supervisor
                    </div>
                    <div>
                        <div class="sig-line-dotted"></div>
                        Security
                    </div>
                </div>

                <!-- Confirmation Text -->
                <div class="confirm-text">
                    Please check and confirm that all Items on this Invoice have been Received
                </div>

                <!-- Customer, Date -->
                <div class="sig-row-2">
                    <div style="text-align: left;">
                        <div class="sig-line-dotted"></div>
                        &nbsp;&nbsp;&nbsp;&nbsp;Customer
                    </div>
                    <div style="text-align: right;">
                        <div class="sig-line-dotted"></div>
                        Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    </div>
                </div>
            </div>
        @else
            <!-- Non-last page placeholder -->
            <div style="margin-top: 20px; font-weight: bold; text-align: right;">
                Continued...
            </div>
        @endif
    </div>
</div>
@endforeach