<?php

class ManualInvoiceController extends TTCrud
{
    protected string $headerTitle = 'Manuelle Rechnungen';
    protected bool $createText = false;

    protected array $additionalJS = ["js/pages/ManualInvoice/ManualInvoice.js"];
    protected array $additionalHead = ["<link rel='stylesheet' href='/js/pages/ManualInvoice/ManualInvoice.css'>"];

    //@formatter:off
    protected array $columns = [
        ['key' => 'id', 'text' => 'ID', 'table' => ['visible' => false], 'modal' => false],
        ['key' => 'invoice_number', 'text' => 'Rechnungsnr.', 'table' => ['sortable' => true, 'filter' => 'search']],
        ['key' => 'invoice_date', 'text' => 'Datum', 'type' => 'timestamp', 'table' => ['sortable' => true, 'filter' => 'date', 'formatter' => 'formatDate']],
        ['key' => 'company', 'text' => 'Firma', 'table' => ['sortable' => true, 'filter' => 'search']],
        ['key' => 'firstname', 'text' => 'Vorname', 'table' => ['visible' => false], 'modal' => false],
        ['key' => 'lastname', 'text' => 'Nachname', 'table' => ['visible' => false], 'modal' => false],
        ['key' => 'customer_number', 'text' => 'Kundennr.', 'table' => ['sortable' => true, 'filter' => 'search']],
        ['key' => 'total', 'text' => 'Netto', 'table' => ['sortable' => true, 'formatter' => 'formatPrice']],
        ['key' => 'total_gross', 'text' => 'Brutto', 'table' => ['sortable' => true, 'formatter' => 'formatPrice']],
        ['key' => 'billing_type', 'text' => 'Zahlungsart', 'table' => ['filter' => 'select', 'filterOptions' => [
            ['value' => 'invoice', 'text' => 'Rechnung'],
            ['value' => 'sepa', 'text' => 'SEPA'],
        ]]],
        ['key' => 'actions', 'text' => 'Aktionen', 'modal' => false, 'table' => ['filter' => false, 'sortable' => false]],
    ];
    //@formatter:on

    protected function createPDFAction($returnFilename = false) {
        // Get data from POST for preview or from database for saved invoice
        $post = json_decode(file_get_contents('php://input'), true);

        if (isset($post['preview']) && $post['preview'] === true) {
            // Create temporary invoice object from POST data for preview
            $invoice = (object)[];
            $invoice->id = 0;
            $invoice->invoice_number = $post['invoice_number'] ?? null;
            $invoice->invoice_date = $post['invoice_date'] ?? time();
            $invoice->customer_number = $post['customer_number'] ?? 0;
            $invoice->fibu_account_number = $post['fibu_account_number'] ?? 0;
            $invoice->company = $post['company'] ?? '';
            $invoice->firstname = $post['firstname'] ?? '';
            $invoice->lastname = $post['lastname'] ?? '';
            $invoice->street = $post['street'] ?? '';
            $invoice->zip = $post['zip'] ?? '';
            $invoice->city = $post['city'] ?? '';
            $invoice->country = $post['country'] ?? 'Österreich';
            $invoice->email = $post['email'] ?? '';
            $invoice->uid = $post['uid'] ?? '';
            $invoice->tax_text = $post['tax_text'] ?? '';
            $invoice->billing_type = $post['billing_type'] ?? 'invoice';
            $invoice->total = $post['total'] ?? 0;
            $invoice->total_gross = $post['total_gross'] ?? 0;

            $positions = [];
            foreach ($post['positions'] ?? [] as $pos) {
                $positions[] = (object)$pos;
            }
        } else {
            // Load from database
            $id = $this->request->id ?? $post['id'] ?? null;
            if (!$id) {
                http_response_code(500);
                self::returnJson(['success' => false, 'message' => 'Rechnung wurde nicht gefunden']);
                return;
            }

            $invoice = new ManualInvoice($id);
            if (!$invoice->id) {
                http_response_code(500);
                self::returnJson(['success' => false, 'message' => 'Rechnung wurde nicht gefunden']);
                return;
            }

            $positions = $invoice->getProperty('positions');
        }

        // Calculate VAT totals
        $vat = [];
        foreach ($positions as $p) {
            $vatrate = is_object($p) ? $p->vatrate : $p['vatrate'];
            $price_gross = is_object($p) ? $p->price_gross : ($p['price_gross'] ?? 0);
            $price_total = is_object($p) ? $p->price_total : ($p['price_total'] ?? 0);

            if (!array_key_exists($vatrate, $vat)) {
                $vat[$vatrate] = 0;
            }
            $vat[$vatrate] += $price_gross - $price_total;
        }

        // Convert positions array to objects if needed
        $invoice->positions = $positions;

        $pdf_vars = [
            "invoice" => $invoice,
            "vat" => $vat,
            "bank_iban" => TT_INVOICE_BANK_IBAN,
            "bank_bic" => TT_INVOICE_BANK_BIC,
            "bank_bank" => TT_INVOICE_BANK_BANK,
            "bank_owner" => TT_INVOICE_BANK_OWNER
        ];

        // Replace placeholders in header
        $headerHtml = file_get_contents(BASEDIR . "/Layout/default/ManualInvoice/PDF_HEADER.html");
        $headerHtml = str_replace("{{ basedir }}", BASEDIR, $headerHtml);
        $headerHtml = str_replace("{{ addressLine_1 }}", $invoice->company ? $invoice->company : "", $headerHtml);
        $headerHtml = str_replace("{{ addressLine_2 }}", trim($invoice->firstname . " " . $invoice->lastname), $headerHtml);
        $headerHtml = str_replace("{{ addressLine_3 }}", $invoice->street ?? '', $headerHtml);
        $headerHtml = str_replace("{{ addressLine_4 }}", ($invoice->zip ?? '') . " " . ($invoice->city ?? ''), $headerHtml);
        $headerHtml = str_replace("{{ addressLine_5 }}", ($invoice->country ?? '') != "Österreich" ? ($invoice->country ?? '') : "", $headerHtml);
        $headerHtml = str_replace("{{ customerNumber }}", $invoice->customer_number ?? '', $headerHtml);
        $headerHtml = str_replace("{{ billingAccount }}", $invoice->fibu_account_number ?? '', $headerHtml);
        $headerHtml = str_replace("{{ invoiceNumber }}", $invoice->invoice_number ?? "VORSCHAU", $headerHtml);
        $headerHtml = str_replace("{{ invoiceDate }}", date("d.m.Y", $invoice->invoice_date ?? time()), $headerHtml);
        $headerHtml = str_replace("{{ vatHtml }}", ($invoice->uid ?? '') ? "<tr><td>Ihre UID:</td><td>" . $invoice->uid . "</td></tr>" : "", $headerHtml);

        // Generate QR code for SEPA payment
        $qrCode = $this->generateSepaQRCode($invoice->invoice_number ?? "VORSCHAU", round($invoice->total_gross ?? 0, 2));
        $headerHtml = str_replace("{{ qrCodeSrc }}", $qrCode, $headerHtml);

        $headerFile = BASEDIR . "/var/temp/manualinvoice_header-" . date("U") . "-" . rand(1000, 9999) . ".html";
        file_put_contents($headerFile, $headerHtml);

        // Replace placeholders in footer
        $footerHtml = file_get_contents(BASEDIR . "/Layout/default/ManualInvoice/PDF_FOOTER.html");
        $footerHtml = str_replace("{{ bank_iban }}", TT_INVOICE_BANK_IBAN_FORMATTED, $footerHtml);
        $footerHtml = str_replace("{{ bank_bic }}", TT_INVOICE_BANK_BIC, $footerHtml);
        $footerHtml = str_replace("{{ bank_bank }}", TT_INVOICE_BANK_BANK, $footerHtml);
        $footerHtml = str_replace("{{ bank_owner }}", TT_INVOICE_BANK_OWNER, $footerHtml);

        $footerFile = BASEDIR . "/var/temp/manualinvoice_footer-" . date("U") . "-" . rand(1000, 9999) . ".html";
        file_put_contents($footerFile, $footerHtml);

        $pdf = new PdfForm("ManualInvoice/PDF_MAIN", $pdf_vars);
        $wkhtmltopdfArgs = "--header-html $headerFile --footer-html $footerFile";
        $filename = $pdf->render($wkhtmltopdfArgs);

        if ($returnFilename === true) return $filename;

        // Return the PDF inline for preview
        header('Content-Type: application/pdf');
        header('Content-Disposition: inline; filename="' . ($invoice->invoice_number ?? 'preview') . '.pdf"');
        readfile($filename);
        die();
    }

    protected function downloadInvoicePdfAction() {
        $id = $this->request->id;
        if (!is_numeric($id) || !$id) {
            $this->layout()->setFlash("Rechnung nicht gefunden", "error");
            $this->redirect("ManualInvoice");
        }

        $invoice = new ManualInvoice($id);
        if (!$invoice->id) {
            $this->layout()->setFlash("Rechnung nicht gefunden", "error");
            $this->redirect("ManualInvoice");
        }

        // Use createPDFAction to get filename
        $pdf_filename = $this->createPDFAction(true);

        if(!$pdf_filename || !file_exists($pdf_filename)) {
            $this->layout()->setFlash("PDF-Datei konnte nicht erstellt werden");
            $this->redirect("ManualInvoice");
        }

        header('Content-Type: application/octet-stream');
        header('Content-disposition: attachment; filename="'.$invoice->invoice_number.'.pdf"');
        header('Content-Transfer-Encoding: binary');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Content-Type: application/pdf');
        header("Content-Length: " . filesize($pdf_filename));

        readfile($pdf_filename);
        exit;
    }

    protected function beforeCreate(&$data): bool {
        // Generate invoice number if not provided
        if (empty($data['invoice_number'])) {
            $data['invoice_number'] = ManualInvoiceModel::getNextInvoiceNumber();
        }

        // Set default values
        if (empty($data['invoice_date'])) {
            $data['invoice_date'] = time();
        }

        return true;
    }

    protected function afterCreate($data) {
        $invoiceId = $data['id'];

        // Save positions
        if (isset($data['positions']) && is_array($data['positions'])) {
            foreach ($data['positions'] as $position) {
                $position['manualinvoice_id'] = $invoiceId;
                $posModel = ManualInvoicepositionModel::create($position);
                $posModel->save();
            }
        }

        // Recalculate totals
        $this->recalculateTotals($invoiceId);
    }

    protected function beforeUpdate(&$data): bool {
        return true;
    }

    protected function afterUpdate($data) {
        $invoiceId = $data['id'];

        // Delete existing positions
        $existingPositions = ManualInvoicepositionModel::search(['manualinvoice_id' => $invoiceId]);
        foreach ($existingPositions as $pos) {
            $pos->delete();
        }

        // Save new positions
        if (isset($data['positions']) && is_array($data['positions'])) {
            foreach ($data['positions'] as $position) {
                $position['manualinvoice_id'] = $invoiceId;
                $posModel = ManualInvoicepositionModel::create($position);
                $posModel->save();
            }
        }

        // Recalculate totals
        $this->recalculateTotals($invoiceId);
    }

    protected function recalculateTotals($invoiceId) {
        $invoice = new ManualInvoice($invoiceId);
        $positions = ManualInvoicepositionModel::search(['manualinvoice_id' => $invoiceId]);

        $total = 0;
        $total_gross = 0;

        foreach ($positions as $pos) {
            $total += $pos->price_total;
            $total_gross += $pos->price_gross;
        }

        $invoice->total = $total;
        $invoice->total_gross = $total_gross;
        $invoice->save();
    }

    protected function customRowsHandler($rows) {
        foreach ($rows as &$row) {
            // Add customer name
            $row->customerName = trim(($row->company ? $row->company : '') . ' ' . $row->firstname . ' ' . $row->lastname);
        }
        return $rows;
    }

    protected function generateSepaQRCode($paymentReference, $amount) {
        $xinonIBAN = TT_INVOICE_BANK_IBAN;
        $xinonBIC = TT_INVOICE_BANK_BIC;
        $xinonOwner = TT_INVOICE_BANK_OWNER;

        $epc = "BCD
001
1
SCT
$xinonBIC
$xinonOwner
$xinonIBAN
EUR$amount
XINO
$paymentReference

XINON GmbH";

        return (new \chillerlan\QRCode\QRCode)->render($epc);
    }
}