<?php

namespace App\Classes;

use App\Classes\Pdf\ContentPdfWrapper;
use App\Classes\Pdf\FilePdfWrapper;
use App\Events\Invoice\GeneratePdf;
use App\Models\Invoice;
use Barryvdh\DomPDF\Facade\Pdf as DomPDF;

class PDF
{
    public static function generateInvoice(Invoice $invoice)
    {
        // Dispatch event to see if any extension wants to handle PDF generation
        $event = new GeneratePdf($invoice);
        event($event);

        // If an extension provided a PDF in any format, handle it
        if ($event->hasPdf()) {
            return self::processPdfFromEvent($event);
        }

        // Fall back to default PDF generation
        return DomPDF::loadView('pdf.invoice', ['invoice' => $invoice]);
    }

    private static function processPdfFromEvent(GeneratePdf $event)
    {
        // If it's already a DomPDF instance, return it
        if ($event->pdf) {
            return $event->pdf;
        }

        // If it's a file path, create a wrapper
        if ($event->pdfPath) {
            return new FilePdfWrapper($event->pdfPath, $event->fileName);
        }

        // If it's content (base64, binary, etc.), create a wrapper
        if ($event->pdfContent) {
            return new ContentPdfWrapper($event->pdfContent, $event->fileName);
        }

        // This shouldn't happen, but fallback just in case
        return DomPDF::loadView('pdf.invoice', ['invoice' => $event->invoice]);
    }
}