<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2023. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Helpers\SwissQr;

use App\Models\Client;
use App\Models\Company;
use App\Models\Invoice;
use Sprain\SwissQrBill as QrBill;

/**
 * SwissQrGenerator.
 */
class SwissQrGenerator
{
    protected Company $company;

    protected $invoice;

    protected Client $client;

    public function __construct($invoice, Company $company)
    {
        $this->company = $company;

        $this->invoice = $invoice;

        $this->client = $invoice->client;
    }

    private function calcDueAmount()
    {
        if ($this->invoice->partial > 0) {
            return $this->invoice->partial;
        }

        if ($this->invoice->status_id == Invoice::STATUS_DRAFT) {
            return $this->invoice->amount;
        }

        return $this->invoice->balance;
    }

    public function run()
    {
        // This is an example how to create a typical qr bill:
        // - with reference number
        // - with known debtor
        // - with specified amount
        // - with human-readable additional information
        // - using your QR-IBAN
        //
        // Likely the most common use-case in the business world.

        // Create a new instance of QrBill, containing default headers with fixed values
        $qrBill = QrBill\QrBill::create();


        // Add creditor information
        // Who will receive the payment and to which bank account?
        $qrBill->setCreditor(
            QrBill\DataGroup\Element\CombinedAddress::create(
                $this->company->present()->name(),
                $this->company->present()->address1(),
                $this->company->present()->getCompanyCityState(),
                'CH'
            )
        );

        $qrBill->setCreditorInformation(
            QrBill\DataGroup\Element\CreditorInformation::create(
                $this->company->present()->qr_iban() ?: '' // This is a special QR-IBAN. Classic IBANs will not be valid here.
            )
        );

        // Add debtor information
        // Who has to pay the invoice? This part is optional.
        //
        // Notice how you can use two different styles of addresses: CombinedAddress or StructuredAddress
        // They are interchangeable for creditor as well as debtor.
        $qrBill->setUltimateDebtor(
            QrBill\DataGroup\Element\StructuredAddress::createWithStreet(
                substr($this->client->present()->name(), 0, 70),
                $this->client->address1 ? substr($this->client->address1, 0, 70) : ' ',
                $this->client->address2 ? substr($this->client->address2, 0, 16) : ' ',
                $this->client->postal_code ? substr($this->client->postal_code, 0, 16) : ' ',
                $this->client->city ? substr($this->client->city, 0, 35) : ' ',
                'CH'
            )
        );

        // Add payment amount information
        // What amount is to be paid?
        $qrBill->setPaymentAmountInformation(
            QrBill\DataGroup\Element\PaymentAmountInformation::create(
                'CHF',
                $this->calcDueAmount()
            )
        );

        // Add payment reference
        // This is what you will need to identify incoming payments.

        if (stripos($this->invoice->number, "Live") === 0) {
            // we're currently in preview status. Let's give a dummy reference for now
            $invoice_number = "123456789";
        } else {
            $tempInvoiceNumber = $this->invoice->number;
            $tempInvoiceNumber = preg_replace('/[^A-Za-z0-9]/', '', $tempInvoiceNumber);
            // $tempInvoiceNumber = substr($tempInvoiceNumber, 1);

            $calcInvoiceNumber = "";
            $array = str_split($tempInvoiceNumber);
            foreach ($array as $char) {
                if (is_numeric($char)) {
                    //
                } else {
                    if ($char) {
                        $char = strtolower($char);
                        $char = ord($char) - 96;
                    } else {
                        return 0;
                    }
                }
                $calcInvoiceNumber .= $char;
            }

            $invoice_number = $calcInvoiceNumber;
        }

        if (strlen($this->company->present()->besr_id()) > 1) {
            $referenceNumber = QrBill\Reference\QrPaymentReferenceGenerator::generate(
                $this->company->present()->besr_id() ?: '',  // You receive this number from your bank (BESR-ID). Unless your bank is PostFinance, in that case use NULL.
                $invoice_number// A number to match the payment with your internal data, e.g. an invoice number
            );

            $qrBill->setPaymentReference(
                QrBill\DataGroup\Element\PaymentReference::create(
                    QrBill\DataGroup\Element\PaymentReference::TYPE_QR,
                    $referenceNumber
                )
            );
        } else {
            $qrBill->setPaymentReference(
                QrBill\DataGroup\Element\PaymentReference::create(
                    QrBill\DataGroup\Element\PaymentReference::TYPE_NON
                )
            );
        }

        // Optionally, add some human-readable information about what the bill is for.
        $qrBill->setAdditionalInformation(
            QrBill\DataGroup\Element\AdditionalInformation::create(
                $this->invoice->public_notes ? substr($this->invoice->public_notes, 0, 139) : ctrans('texts.invoice_number_placeholder', ['invoice' => $this->invoice->number])
            )
        );


        // Now get the QR code image and save it as a file.
        try {
            $output = new QrBill\PaymentPart\Output\HtmlOutput\HtmlOutput($qrBill, $this->resolveLanguage());

            $html = $output
                ->setPrintable(false)
                ->getPaymentPart();

            return $html;
        } catch (\Exception $e) {

            if(is_iterable($qrBill->getViolations())) {

                foreach ($qrBill->getViolations() as $key => $violation) {
                    nlog("qr");
                    nlog($violation);
                }

            }

            nlog($e->getMessage());

            return '';
            // return $e->getMessage();
        }
    }

    private function resolveLanguage(): string
    {
        $language = $this->client->locale() ?: 'en';

        switch ($language) {
            case 'de':
                return 'de';
            case 'en':
            case 'en_GB':
                return 'en';
            case 'it':
                return 'it';
            case 'fr':
            case 'fr_CA':
            case 'fr_CH':
                return 'fr';

            default:
                return 'en';
        }

    }

}