<?php

namespace App;

use \DOMDocument;
use \DOMXPath;

class XmlReader
{
    private DOMDocument $xml;
    private DOMXPath $xpath;

    public function __construct(string $xml)
    {
        $this->xml = new DOMDocument();
        $this->xml->loadXML($xml);
        $this->xpath = new DOMXPath($this->xml);
    }

    public function incoming(): array
    {
        $incoming = [];

        $incoming['invoice_number'] = $this->xpath->query('cbc:ID', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['issue_date'] = $this->xpath->query('cbc:IssueDate', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['due_date'] = $this->xpath->query('cbc:DueDate', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['invoice_type_code'] = $this->xpath->query('cbc:InvoiceTypeCode', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['currency_code'] = $this->xpath->query('cbc:DocumentCurrencyCode', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['net'] = $this->xpath->query('cac:LegalMonetaryTotal/cbc:TaxExclusiveAmount', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['gross'] = $this->xpath->query('cac:LegalMonetaryTotal/cbc:TaxInclusiveAmount', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['tax'] = $this->xpath->query('cac:TaxTotal/cbc:TaxAmount', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['pay_name'] = $this->xpath->query('cac:PaymentMeans/cac:PayeeFinancialAccount/cbc:Name', $this->xml->documentElement)->item(0)->nodeValue;
        $incoming['pay_bic'] = ($this->xpath->query('cac:PaymentMeans/cac:PayeeFinancialAccount/cac:FinancialInstitutionBranch/cbc:ID', $this->xml->documentElement)->length > 0) ? $this->xpath->query('cac:PaymentMeans/cac:PayeeFinancialAccount/cac:FinancialInstitutionBranch/cbc:ID', $this->xml->documentElement)->item(0)->nodeValue : null;
        $incoming['pay_iban'] = $this->xpath->query('cac:PaymentMeans/cac:PayeeFinancialAccount/cbc:ID', $this->xml->documentElement)->item(0)->nodeValue;

        return $incoming;
    }

    public function supplier(): array
    {
        $supplier = [];
        $supplierNode = $this->xpath->query('cac:AccountingSupplierParty', $this->xml->documentElement)->item(0);

        $supplier['name'] = $this->xpath->query("cac:Party/cac:PartyName/cbc:Name", $supplierNode)->item(0)->nodeValue;
        $supplier['registration_name'] = $this->xpath->query("cac:Party/cac:PartyLegalEntity/cbc:RegistrationName", $supplierNode)->item(0)->nodeValue;
        $supplier['email'] = $this->xpath->query("cac:Party/cbc:EndpointID", $supplierNode)->item(0)->nodeValue;
        $supplier['address'] = $this->xpath->query("cac:Party/cac:PostalAddress/cbc:StreetName", $supplierNode)->item(0)->nodeValue;
        $supplier['city'] = $this->xpath->query("cac:Party/cac:PostalAddress/cbc:CityName", $supplierNode)->item(0)->nodeValue;
        $supplier['zip'] = $this->xpath->query("cac:Party/cac:PostalAddress/cbc:PostalZone", $supplierNode)->item(0)->nodeValue;
        $supplier['country_code'] = $this->xpath->query("cac:Party/cac:PostalAddress/cac:Country/cbc:IdentificationCode", $supplierNode)->item(0)->nodeValue;
        $supplier['tax_fc'] = ($this->xpath->query("cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID/text() = 'FC']", $supplierNode)->length === 0) ? null : $this->xpath->query("cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID/text() = 'FC']/cbc:CompanyID", $supplierNode)->item(0)->nodeValue;
        $supplier['tax_vat'] = ($this->xpath->query("cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID/text() = 'VAT']", $supplierNode)->length === 0) ? null : $this->xpath->query("cac:Party/cac:PartyTaxScheme[cac:TaxScheme/cbc:ID/text() = 'VAT']/cbc:CompanyID", $supplierNode)->item(0)->nodeValue;
        $supplier['contact_name'] = $this->xpath->query("cac:Party/cac:Contact/cbc:Name", $supplierNode)->item(0)->nodeValue;
        $supplier['contact_phone'] = $this->xpath->query("cac:Party/cac:Contact/cbc:Telephone", $supplierNode)->item(0)->nodeValue;
        $supplier['contact_email'] = $this->xpath->query("cac:Party/cac:Contact/cbc:ElectronicMail", $supplierNode)->item(0)->nodeValue;

        return $supplier;
    }

    public function items(): array
    {
        $items = [];
        $itemList = $this->xpath->query('cac:InvoiceLine', $this->xml->documentElement);

        foreach ($itemList as $itemNode) {
            $item = [];
            $item['name'] = $this->xpath->query("cac:Item/cbc:Name", $itemNode)->item(0)->nodeValue;
            $item['article_number'] = null;
            $item['description'] = ($this->xpath->query("cac:Item/cbc:Description", $itemNode)->length === 0) ? null : $this->xpath->query("cac:Item/cbc:Description", $itemNode)->item(0)->nodeValue;
            $item['amount'] = $this->xpath->query("cbc:InvoicedQuantity", $itemNode)->item(0)->nodeValue;
            $item['discount'] = null;
            $item['tax'] = $this->xpath->query("cac:Item/cac:ClassifiedTaxCategory/cbc:Percent", $itemNode)->item(0)->nodeValue;
            $item['price'] = $this->xpath->query("cac:Price/cbc:PriceAmount", $itemNode)->item(0)->nodeValue;
            $item['total'] = $this->xpath->query("cbc:LineExtensionAmount", $itemNode)->item(0)->nodeValue;

            $items[] = $item;
        }

        return $items;
    }

    public function taxes(): array
    {
        $taxes = [];
        $taxList = $this->xpath->query('cac:TaxTotal/cac:TaxSubtotal', $this->xml->documentElement);

        foreach ($taxList as $taxNode) {
            $tax = [];
            $tax['taxable_amount'] = $this->xpath->query("cbc:TaxableAmount", $taxNode)->item(0)->nodeValue;
            $tax['amount'] = $this->xpath->query("cbc:TaxAmount", $taxNode)->item(0)->nodeValue;
            $tax['percentage'] = $this->xpath->query("cac:TaxCategory/cbc:Percent", $taxNode)->item(0)->nodeValue;
            $tax['currency'] = $this->xpath->query("cbc:TaxableAmount", $taxNode)->item(0)->getAttribute("currencyID");

            $taxes[] = $tax;
        }

        return $taxes;
    }
}