<?php
class invoiceEdiXML
{

    private $xml;
    private $id;
    private $i; 

    private $ediInvoicesPath = '/var/edi/twinpol/invoices/';
    
    function invoiceEdiXML ($id)
    {
        $this->id = $id;
        $this->i = new EcmInvoiceOut();
        $this->i->retrieve($this->id);
    }

    public function getXML () {
        $i = $this->i;
        if ($i->type == 'normal')
            $this->xml = $this->createInvoiceXML();
        elseif ($i->type == 'correct')
            $this->xml = $this->createCorrectInvoiceXML();

        $this->xml->flush();
    }

    private function createInvoiceXML () {
        global $timedate;
        $db = $GLOBALS['db'];
        $i = $this->i;
        // get data
        // get WZ && Sale info
        $wz = $db->fetchByAssoc($db->query(
            "SELECT 
                parent_id, document_no, register_date, so_id 
            FROM ecmstockdocouts WHERE id ='$i->wz_id'"));
        $sale = $db->fetchByAssoc(
                $db->query(
                        "SELECT document_no, register_date, parent_document_no FROM ecmsales WHERE id = '" .
                                 $i->so_id . "'"));
        // get ILNs
        $xml = new XMLWriter();
        $name = str_replace('/', '_', $i->document_no);
        $name = str_replace(' ', '', $name);
        $name = str_replace('FV', '', $name);
        $xml->openURI($this->ediInvoicesPath . $name . '.xml');
        $xml->startDocument('1.0', 'UTF-8');
        $xml->startElement('Document-Invoice');
        $xml->startElement('Invoice-Header');
        $xml->writeElement('InvoiceNumber', $i->document_no);
        $xml->writeElement('InvoiceDate', 
                $timedate->to_db_date($i->register_date));
        $xml->writeElement('SalesDate', $timedate->to_db_date($i->sell_date));
        $c = new Currency();
        $c->retrieve($i->currency_id);
        $xml->writeElement('InvoiceCurrency', $c->iso4217);
        unset($c);
        $xml->writeElement('InvoicePaymentDueDate', 
                $timedate->to_db_date($i->payment_date));
        $xml->writeElement('InvoicePaymentTerms', $i->payment_date_days);
        $xml->writeElement('InvoicePostDate', 
                $timedate->to_db_date($i->register_date));
        $xml->writeElement('DocumentFunctionCode', 'O');
        $xml->startElement('Order');
        $xml->writeElement('BuyerOrderNumber', $sale['parent_document_no']);
        $xml->writeElement('BuyerOrderDate', $sale['register_date']);
        $xml->endElement(); // </Line-Order>
        $xml->startElement('Delivery');
        $xml->writeElement('DeliveryLocationNumber', $i->parent_shipping_iln);
        $xml->writeElement('DespatchNumber', $wz['document_no']);
        $xml->writeElement('DeliveryDate', $wz['register_date']);
        $xml->endElement(); // </Line-Delivery>
        $xml->endElement(); // </Invoice-Header>
        $xml->startElement('Invoice-Parties');
        $xml->startElement('Buyer');
        $a = new Account();
        $a->retrieve($i->parent_id);
        if (! $i->parent_iln || $i->parent_iln == '')
            $i->parent_iln = $a->iln;
        unset($a);
        $xml->writeElement('ILN', $i->parent_iln);
        $xml->writeElement('TaxID', $i->parent_nip);
        $xml->writeElement('Name', $i->parent_name);
        $xml->writeElement('StreetAndNumber', $i->parent_address_street);
        $xml->writeElement('CityName', $i->parent_address_city);
        $xml->writeElement('PostalCode', $i->parent_address_postalcode);
        $xml->writeElement('Country', 'PL');
        $xml->endElement(); // </Buyer>
        $xml->startElement('Invoicee');
        $a = new Account();
        $a->retrieve($i->parent_id);
        if (! $i->parent_iln || $i->parent_iln == '')
            $i->parent_iln = $a->iln;
        unset($a);
        $xml->writeElement('ILN', $i->parent_iln);
        $xml->writeElement('TaxID', $i->parent_nip);
        $xml->writeElement('Name', $i->parent_name);
        $xml->writeElement('StreetAndNumber', $i->parent_address_street);
        $xml->writeElement('CityName', $i->parent_address_city);
        $xml->writeElement('PostalCode', $i->parent_address_postalcode);
        $xml->writeElement('Country', 'PL');
        $xml->endElement(); // </Invoicee>
        $xml->startElement('Payer');
        if ($i->parent_payer_address_name && $i->parent_payer_address_name != "") {
            $iln = $db->fetchByAssoc(
                    $db->query(
                            "SELECT iln, to_vatid FROM accounts WHERE name = '" .
                                     $i->parent_payer_address_name . "'"));
            $xml->writeElement('ILN', $iln['iln']);
            $xml->writeElement('TaxID', $iln['to_vatid']);
            $xml->writeElement('Name', $i->parent_name);
            $xml->writeElement('StreetAndNumber', 
                    $i->parent_payer_address_street);
            $xml->writeElement('CityName', $i->parent_payer_address_city);
            $xml->writeElement('PostalCode', 
                    $i->parent_payer_address_postalcode);
            $xml->writeElement('Country', 'PL');
        } else {
            $a = new Account();
            $a->retrieve($i->parent_id);
            if (! $i->parent_iln || $i->parent_iln == '') {
                $i->parent_iln = $a->iln;
            }
            unset($a);
            $xml->writeElement('ILN', $i->parent_iln);
            $xml->writeElement('TaxID', $i->parent_nip);
            $xml->writeElement('Name', $i->parent_name);
            $xml->writeElement('StreetAndNumber', $i->parent_address_street);
            $xml->writeElement('CityName', $i->parent_address_city);
            $xml->writeElement('PostalCode', $i->parent_address_postalcode);
            $xml->writeElement('Country', 'PL');
        }
        $xml->endElement(); // </Payer>
        $seller_info = array(
                'Seller',
                'Payee',
                'SellerHeadquarters'
        );
        foreach ($seller_info as $val) {
            $xml->startElement($val);
            $xml->writeElement('ILN', '5909000896239'); // 5909000837119
            if ($val != 'SellerHeadquarters')
                $xml->writeElement('TaxID', '8792676609');
            $xml->writeElement('Name', 'Twinpol Sp. z o.o.');
            $xml->writeElement('StreetAndNumber', 'Al. Lipowa 48');
            $xml->writeElement('CityName', 'Obrowo');
            $xml->writeElement('PostalCode', '87-126');
            $xml->writeElement('Country', 'PL');
            if ($val == 'Seller') {
                if ($i->parent_id == '682d24c0-0f28-83c5-a840-64d9bbb03632') {
                    $xml->writeElement('CodeByBuyer', '017776'); // Carefour
                } else { // Auchan
                    if ($i->parent_shipping_iln == '5900014200012') {
                        $xml->writeElement('CodeByBuyer', '845');
                    } else {
                        $xml->writeElement('CodeByBuyer', '843');
                    }
                }
            }
            $xml->endElement();
        }
        $xml->endElement(); // </Invoice-Parties>
        $xml->startElement('Invoice-Lines');
        $pl = $i->getPositionList(true);
        foreach ($pl as $p) {
            if ($i->parent_id == '682d24c0-0f28-83c5-a840-64d9bbb03632') { // Carrefour - EAN2
                $ean = $db->fetchByAssoc($db->query("SELECT ean2 as ean FROM ecmproducts WHERE id = '" . $p['product_id'] . "'"));
            } else { // Others - EAN
                $ean = $db->fetchByAssoc($db->query("SELECT ean as ean FROM ecmproducts WHERE id = '" . $p['product_id'] . "'"));
            }
            $unitPrecision = isset($p['unit_precision']) ? $p['unit_precision']: 2;
            $p['quantity'] = round($p['quantity'], $unitPrecision);
            $xml->startElement('Line');
            $xml->startElement('Line-Item');
            $xml->writeElement('LineNumber', $p['position'] + 1);
            $xml->writeElement('BuyerItemCode', $p['recipient_code']);
            $xml->writeElement('EAN', $ean['ean']);
            $xml->writeElement('SupplierItemCode', $p['product_code']);
            // prepare name
            if (strlen($p['name']) > 70){
            	mb_internal_encoding("UTF-8");

            	$p['name'] = mb_substr($p['name'], 0, 67, "utf-8") . '...';
         
            }   
            $xml->writeElement('ItemDescription', $p['name']);
            $xml->writeElement('ItemType', 'CU');
            $xml->writeElement('InvoiceQuantity', $p['quantity']);
            $xml->writeElement('UnitOfMeasure', 'PCE');
            $xml->writeElement('InvoiceUnitPacksize', '1');
            $xml->writeElement('PackItemUnitOfMeasure', 'PCE');
            $xml->writeElement('InvoiceUnitNetPrice', $p['price_netto']);
            $xml->writeElement('TaxRate', $p['ecmvat_value']);
            $xml->writeElement('TaxCategoryCode', 'S');
            $xml->writeElement('TaxAmount', $p['total_vat']);
            $xml->writeElement('NetAmount', $p['total_netto']);
            $xml->endElement(); // </Line>
            $xml->endElement(); // </Line-Item>
        }
        $xml->endElement(); // </Invoice-Lines>
        $xml->startElement('Invoice-Summary');
        $xml->writeElement('TotalLines', sizeof($pl));
        $xml->writeElement('TotalNetAmount', $i->total_netto);
        $xml->writeElement('TotalTaxableBasis', $i->total_netto);
        $xml->writeElement('TotalTaxAmount', $i->total_vat);
        $xml->writeElement('TotalGrossAmount', $i->total_brutto);
        $xml->startElement('Tax-Summary');

        $vats = explode(',', $i->vats_summary);
        array_pop($vats);
        foreach ($vats as $v) {
            $vat = explode(':',$v);
            $xml->startElement('Tax-Summary-Line');
            $xml->writeElement('TaxRate', explode('%', $vat[0])[0]);
            $xml->writeElement('TaxCategoryCode', 'S');
            $xml->writeElement('TaxAmount', $vat[2]);
            $xml->writeElement('TaxableBasis', $vat[1]);
            $xml->writeElement('TaxableAmount', $vat[1]);
            $xml->writeElement('GrossAmount', $vat[3]);
            $xml->endElement(); // </Tax-Summary-Line>
        }
        $xml->endElement(); // </Tax-Summary>
        $xml->endElement(); // </Invoice-Summary>
        $xml->endElement(); // </Document-Invoice>
        
        return $xml;
    }

    private function createCorrectInvoiceXML () {
        global $timedate;
        $db = $GLOBALS['db'];
        $i = $this->i;

        $xml = new XMLWriter();
        $name = str_replace('/', '_', $i->document_no);
        $name = str_replace(' ', '', $name);
        $name = str_replace('FV', '', $name);
        $xml->openURI($this->ediInvoicesPath . 'KOR_' . $name . '.xml');

        $oldInvoice = $db->fetchByAssoc($db->query("
        SELECT i.total_netto, i.total_brutto, i.total_vat, i.vats_summary, i.document_no, i.register_date,
            s.shipping_iln
            FROM ecminvoiceouts AS i
            INNER JOIN ecmsales AS s ON s.id = i.so_id
            WHERE i.id='".$i->ecminvoiceout_id."'"));

        $xml->startDocument('1.0', 'UTF-8');
        $xml->startElement('Document-Invoice');
        $xml->startElement('Invoice-Header');
        $xml->writeElement('InvoiceNumber', $i->document_no);
        $xml->writeElement('InvoiceDate', 
                $timedate->to_db_date($i->register_date));
        $xml->writeElement('SalesDate', $timedate->to_db_date($i->sell_date));
        $c = new Currency();
        $c->retrieve($i->currency_id);
        $xml->writeElement('InvoiceCurrency', $c->iso4217);
        unset($c);
        $xml->writeElement('InvoicePaymentDueDate', 
                $timedate->to_db_date($i->payment_date));
        $xml->writeElement('InvoicePaymentTerms', $i->payment_date_days);
        $xml->writeElement('InvoicePostDate', 
                $timedate->to_db_date($i->register_date));
        $xml->writeElement('DocumentFunctionCode', 'C');
        // TODO: FIX
        //$xml->writeElement('CorrectionReason', 'zgł. rekl.030/19/P320');
        $xml->startElement('Order');
        $xml->writeElement('BuyerOrderNumber', end(explode(' ', $i->order_no)));
        // FIX $xml->writeElement('BuyerOrderDate', $timedate->to_db_date($i->register_date));
        $xml->writeElement('BuyerOrderDate', '2023-08-01');
        $xml->endElement(); // </Line-Order>
        $xml->startElement('Reference');
        $xml->writeElement('InvoiceReferenceNumber', $oldInvoice['document_no']);
        $xml->writeElement('InvoiceReferenceDate', $timedate->to_db_date($oldInvoice['register_date']));
        $xml->endElement(); // </Reference>
        $xml->startElement('Delivery');
        $xml->writeElement('DeliveryLocationNumber', $oldInvoice['shipping_iln']);
        $xml->writeElement('DespatchNumber', $i->document_no);
        $xml->writeElement('DeliveryDate', $timedate->to_db_date($i->register_date));
        $xml->endElement(); // </Line-Delivery>
        $xml->endElement(); // </Invoice-Header>
        $xml->startElement('Invoice-Parties');
        $xml->startElement('Buyer');
        $a = new Account();
        $a->retrieve($i->parent_id);
        if (! $i->parent_iln || $i->parent_iln == '')
            $i->parent_iln = $a->iln;
        unset($a);
        $xml->writeElement('ILN', $i->parent_iln);
        $xml->writeElement('TaxID', $i->parent_nip);
        $xml->writeElement('Name', $i->parent_name);
        $xml->writeElement('StreetAndNumber', $i->parent_address_street);
        $xml->writeElement('CityName', $i->parent_address_city);
        $xml->writeElement('PostalCode', $i->parent_address_postalcode);
        $xml->writeElement('Country', 'PL');
        $xml->endElement(); // </Buyer>
        $xml->startElement('Invoicee');
        $a = new Account();
        $a->retrieve($i->parent_id);
        if (! $i->parent_iln || $i->parent_iln == '')
            $i->parent_iln = $a->iln;
        unset($a);
        $xml->writeElement('ILN', $i->parent_iln);
        $xml->writeElement('TaxID', $i->parent_nip);
        $xml->writeElement('Name', $i->parent_name);
        $xml->writeElement('StreetAndNumber', $i->parent_address_street);
        $xml->writeElement('CityName', $i->parent_address_city);
        $xml->writeElement('PostalCode', $i->parent_address_postalcode);
        $xml->writeElement('Country', 'PL');
        $xml->endElement(); // </Invoicee>
        $xml->startElement('Payer');
        if ($i->parent_payer_address_name && $i->parent_payer_address_name != "") {
            $iln = $db->fetchByAssoc(
                    $db->query(
                            "SELECT iln, to_vatid FROM accounts WHERE name = '" .
                                     $i->parent_payer_address_name . "'"));
            $xml->writeElement('ILN', $iln['iln']);
            $xml->writeElement('TaxID', $iln['to_vatid']);
            $xml->writeElement('Name', $i->parent_name);
            $xml->writeElement('StreetAndNumber', 
                    $i->parent_payer_address_street);
            $xml->writeElement('CityName', $i->parent_payer_address_city);
            $xml->writeElement('PostalCode', 
                    $i->parent_payer_address_postalcode);
            $xml->writeElement('Country', 'PL');
        } else {
            $a = new Account();
            $a->retrieve($i->parent_id);
            if (! $i->parent_iln || $i->parent_iln == '')
                $i->parent_iln = $a->iln;
            unset($a);
            $xml->writeElement('ILN', $i->parent_iln);
            $xml->writeElement('TaxID', $i->parent_nip);
            $xml->writeElement('Name', $i->parent_name);
            $xml->writeElement('StreetAndNumber', $i->parent_address_street);
            $xml->writeElement('CityName', $i->parent_address_city);
            $xml->writeElement('PostalCode', $i->parent_address_postalcode);
            $xml->writeElement('Country', 'PL');
        }
        $xml->endElement(); // </Payer>
        $e5_info = array(
                'Seller',
                'Payee',
                'SellerHeadquarters'
        );
        foreach ($e5_info as $val) {
            $xml->startElement($val);
            $xml->writeElement('ILN', '5909000896239');
            if ($val != 'SellerHeadquarters')
                $xml->writeElement('TaxID', '8792676609');
            $xml->writeElement('Name', 'Twinpol Sp. z o.o.');
            $xml->writeElement('StreetAndNumber', 'Al. Lipowa 48');
            $xml->writeElement('CityName', 'Obrowo');
            $xml->writeElement('PostalCode', '87-126');
            $xml->writeElement('Country', 'PL');
            if ($val == 'Seller') {
                if ($i->parent_id == '682d24c0-0f28-83c5-a840-64d9bbb03632') {
                    $xml->writeElement('CodeByBuyer', '017776'); // Carefour
                } else { //Auchan
                    if ($oldInvoice['shipping_iln'] == '5900014200012') {
                        $xml->writeElement('CodeByBuyer', '845');
                    } else {
                        $xml->writeElement('CodeByBuyer', '843');
                    }
                }
            }
            $xml->endElement();
        }
        $xml->endElement(); // </Invoice-Parties>
        $xml->startElement('Invoice-Lines');
        
        $products =  $db->query("
            SELECT i.id, i.code, i.position, i.recipient_code, p.ean, i.name,
            i.quantity, i.price_netto, i.total_netto, i.total_vat, i.total_brutto, i.ecmvat_value,
            c.quantity as c_quantity, c.price_netto as c_price_netto, 
            c.total_netto as c_total_netto, c.total_vat as c_total_vat, 
            c.total_brutto as c_total_brutto, c.ecmvat_value as c_ecmvat_value
            FROM ecminvoiceoutitems as i
            LEFT JOIN ecminvoiceoutitems as c ON i.id = c.old_ecminvoiceoutitem_id
            INNER JOIN ecmproducts as p ON i.ecmproduct_id = p.id
            WHERE c.ecminvoiceout_id = '".$i->id."'
            GROUP BY i.position
        ");

        $sum = Array();
        $sum['total_netto'] = 0;
        $sum['total_vat'] = 0;
        $sum['total_brutto'] = 0;
        $sum['c_total_netto'] = 0;
        $sum['c_total_vat'] = 0;
        $sum['c_total_brutto'] = 0;
        $sum['vats'] = array();
        while ($p = $db->fetchByAssoc($products)) {
            $unitPrecision = isset($p['unit_precision']) ? $p['unit_precision']: 2;
            $p['quantity'] = round($p['quantity'], $unitPrecision);
            $p['c_quantity'] = round($p['c_quantity'], $unitPrecision);

            $xml->startElement('Line');
            $xml->startElement('Line-Item');
            $xml->writeElement('LineNumber', $p['position'] + 1);
            $xml->writeElement('BuyerItemCode', $p['recipient_code']);
            $xml->writeElement('EAN', $p['ean']);
            $xml->writeElement('SupplierItemCode', $p['code']);
            // prepare name
            if (strlen($p['name']) > 70){
            	mb_internal_encoding("UTF-8");

            	$p['name'] = mb_substr($p['name'], 0, 67, "utf-8") . '...';
         
            }    
            $xml->writeElement('ItemDescription', $p['name']);
            $xml->writeElement('ItemType', 'CU');
            $xml->writeElement('UnitOfMeasure', 'PCE');
            $xml->writeElement('InvoiceUnitPacksize', '1');
            $xml->writeElement('PackItemUnitOfMeasure', 'PCE');


            if (!is_numeric($p['c_quantity'])) {
                $p['c_quantity'] = $p['quantity'];
                $p['c_price_netto'] = $p['price_netto'];
                $p['c_total_netto'] = $p['total_netto'];
                $p['c_total_vat'] = $p['total_vat'];
                $p['c_total_brutto'] = $p['total_brutto'];
                $p['c_ecmvat_value'] = $p['ecmvat_value'];
            }
            
            $xml->writeElement('InvoiceQuantity', $p['c_quantity']);
            $xml->writeElement('InvoiceUnitNetPrice', $p['c_price_netto']);
            $xml->writeElement('TaxRate', $p['c_ecmvat_value']);
            $xml->writeElement('TaxCategoryCode', 'S');
            $xml->writeElement('TaxAmount', $p['c_total_vat']);
            $xml->writeElement('NetAmount', $p['c_total_netto']);

            $xml->writeElement('PreviousInvoiceQuantity', $p['quantity']);
            $xml->writeElement('PreviousInvoiceUnitNetPrice', $p['price_netto']);
          //  $xml->writeElement('PreviousTaxRate', $p['total_vat']);
            $xml->writeElement('PreviousTaxCategoryCode', 'S');
            $xml->writeElement('PreviousTaxRate', $p['ecmvat_value']);
            $xml->writeElement('PreviousTaxAmount', $p['total_vat']);
            $xml->writeElement('PreviousNetAmount', $p['total_netto']);

            $xml->writeElement('CorrectionInvoiceQuantity', round($p['c_quantity'] - $p['quantity'],2));
            $xml->writeElement('CorrectionInvoiceUnitNetPrice', round($p['c_price_netto'] - $p['price_netto'],2));
            $xml->writeElement('CorrectionTaxAmount', round($p['c_total_vat'] - $p['total_vat'],2));
            $xml->writeElement('CorrectionNetAmount', round($p['c_total_netto'] - $p['total_netto'],2));

            $xml->endElement(); // </Line>
            $xml->endElement(); // </Line-Item>

            $sum['total_netto'] += $p['total_netto'];
            $sum['c_total_netto'] += $p['c_total_netto'];
            $sum['total_vat'] += $p['total_vat'];
            $sum['c_total_vat'] += $p['c_total_vat'];
            $sum['total_brutto'] += $p['total_brutto'];
            $sum['c_total_brutto'] += $p['c_total_brutto'];

            if ($sum['vats'][$p['ecmvat_value']] == null) {
                $sum['vats'][$p['ecmvat_value']]['netto'] = $p['total_netto'];
                $sum['vats'][$p['ecmvat_value']]['vat'] = $p['total_vat'];
                $sum['vats'][$p['ecmvat_value']]['brutto'] = $p['total_brutto'];
                $sum['vats'][$p['ecmvat_value']]['c_netto'] = 0;
                $sum['vats'][$p['ecmvat_value']]['c_vat'] = 0;
                $sum['vats'][$p['ecmvat_value']]['c_brutto'] = 0;
            } else {
                $sum['vats'][$p['ecmvat_value']]['netto'] += $p['total_netto'];
                $sum['vats'][$p['ecmvat_value']]['vat'] += $p['total_vat'];
                $sum['vats'][$p['ecmvat_value']]['brutto'] += $p['total_brutto'];
            }

            if ($sum['vats'][$p['c_ecmvat_value']] == null) {
                $sum['vats'][$p['c_ecmvat_value']]['c_netto'] = $p['c_total_netto'];
                $sum['vats'][$p['c_ecmvat_value']]['c_vat'] = $p['c_total_vat'];
                $sum['vats'][$p['c_ecmvat_value']]['c_brutto'] = $p['c_total_brutto'];
                $sum['vats'][$p['c_ecmvat_value']]['netto'] = 0;
                $sum['vats'][$p['c_ecmvat_value']]['vat'] = 0;
                $sum['vats'][$p['c_ecmvat_value']]['brutto'] = 0;
            } else {
                $sum['vats'][$p['c_ecmvat_value']]['c_netto'] += $p['c_total_netto'];
                $sum['vats'][$p['c_ecmvat_value']]['c_vat'] += $p['c_total_vat'];
                $sum['vats'][$p['c_ecmvat_value']]['c_brutto'] += $p['c_total_brutto'];
            }
        }
        $xml->endElement(); // </Invoice-Lines>
        $xml->startElement('Invoice-Summary');
        $xml->writeElement('TotalLines', $products->num_rows);
        $xml->writeElement('TotalNetAmount', $sum['c_total_netto']);
        $xml->writeElement('TotalTaxableBasis', $sum['c_total_netto']);
        $xml->writeElement('TotalTaxAmount', $sum['c_total_vat']);
        $xml->writeElement('TotalGrossAmount', $sum['c_total_brutto']);

        $xml->writeElement('PreviousTotalNetAmount', $sum['total_netto']);
        $xml->writeElement('PreviousTotalTaxableBasis', $sum['total_netto']);
        $xml->writeElement('PreviousTotalTaxAmount', $sum['total_vat']);
        $xml->writeElement('PreviousTotalGrossAmount', $sum['total_brutto']);
        
        $xml->writeElement('CorrectionTotalNetAmount', round($sum['c_total_netto'] - $sum['total_netto'],2));
        $xml->writeElement('CorrectionTotalTaxableBasis', round($sum['c_total_netto'] - $sum['total_netto'],2));
        $xml->writeElement('CorrectionTotalTaxAmount', round($sum['c_total_vat'] - $sum['total_vat'],2));
        $xml->writeElement('CorrectionTotalGrossAmount', round($sum['c_total_brutto'] - $sum['total_brutto'],2));
        
        $xml->startElement('Tax-Summary');

        if ($i->total_netto != round($sum['c_total_netto'] - $sum['total_netto'],2)) {
            die("Błąd sumy podczas generowania pliku XML. Skontaktuj się z administratorem.");
        }

        foreach ($sum['vats'] as $k=>$v) {
            $xml->startElement('Tax-Summary-Line');
            $xml->writeElement('TaxRate', $k);
            $xml->writeElement('TaxCategoryCode', 'S');
            $xml->writeElement('TaxAmount', $v['c_vat']);
            $xml->writeElement('TaxableAmount', $v['c_netto']);

            $xml->writeElement('PreviousTaxRate', $k);
            $xml->writeElement('PreviousTaxCategoryCode', 'S');
            $xml->writeElement('PreviousTaxAmount', $v['vat']);
            $xml->writeElement('PreviousTaxableAmount', $v['netto']);

            $xml->writeElement('CorrectionTaxAmount', round($v['c_vat'] - $v['vat'],2));
            $xml->writeElement('CorrectionTaxableAmount', round($v['c_netto'] - $v['netto'],2));
            $xml->endElement(); // </Tax-Summary-Line>
        }

        $xml->endElement(); // </Tax-Summary>
        $xml->endElement(); // </Invoice-Summary>
        $xml->endElement(); // </Document-Invoice>
        
        return $xml;
    }
}

function brecho() {
    echo '<pre>';
    foreach (func_get_args() as $arg) {
        print_r($arg);
        echo "<br>";
    }
    echo '</pre>';
}