<?php

namespace Modules\Webstatement\Jobs;

use Exception;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;
use Owenoj\PDFPasswordProtect\Facade\PDFPasswordProtect;
use Webklex\PDFMerger\Facades\PDFMergerFacade as PDFMerger;

class CombinePdfJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    protected $pdfFiles;
    protected $outputPath;
    protected $outputFilename;
    protected $password;

    /**
     * Create a new job instance.
     *
     * @param array $pdfFiles Array of PDF file paths to combine
     * @param string $outputPath Directory where the combined PDF will be saved
     * @param string $outputFilename Filename for the combined PDF
     * @param string $password Password to protect the PDF
     */
    public function __construct(array $pdfFiles, string $outputPath, string $outputFilename, string $password)
    {
        $this->pdfFiles = $pdfFiles;
        $this->outputPath = $outputPath;
        $this->outputFilename = $outputFilename;
        $this->password = $password;
    }

    /**
     * Execute the job.
     */
    public function handle(): void
    {
        try {
            // Initialize the PDF merger
            $merger = PDFMerger::init();

            // Add each PDF file to the merger
            foreach ($this->pdfFiles as $pdfFile) {
                if (file_exists($pdfFile)) {
                    $merger->addPDF($pdfFile, 'all');
                } else {
                    Log::warning("PDF file not found: {$pdfFile}");
                }
            }

            // Make sure the output directory exists
            if (!file_exists($this->outputPath)) {
                mkdir($this->outputPath, 0755, true);
            }

            // Merge the PDFs
            $merger->merge();

            // Save the merged PDF
            $fullPath = $this->outputPath . '/' . $this->outputFilename;
            $merger->save($fullPath);

            // Apply password protection if password is provided
            if (!empty($this->password)) {
                $tempPath = $this->outputPath . '/temp_' . $this->outputFilename;

                // Rename the original file to a temporary name
                rename($fullPath, $tempPath);

                // Apply password protection and save to the original filename
                PDFPasswordProtect::encrypt($tempPath, $fullPath, $this->password);

                // Remove the temporary file
                if (file_exists($tempPath)) {
                    unlink($tempPath);
                }

                Log::info("PDF password protection applied successfully.");
            }

            Log::info("PDFs combined successfully. Output file: {$fullPath}");
        } catch (Exception $e) {
            Log::error("Error combining PDFs: " . $e->getMessage());
            throw $e;
        }
    }
}