<?php

declare(strict_types=1);

namespace App\Services;

use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;
use Smalot\PdfParser\Parser;

/**
 * Service for extracting text content from PDF files.
 */
class PdfExtractionService
{
    /**
     * Extract text from a PDF file.
     *
     * @param string $filePath The path to the PDF file
     * @return array{success: bool, content: string|null, error: string|null}
     */
    public function extract(string $filePath): array
    {
        if (!file_exists($filePath)) {
            return [
                'success' => false,
                'content' => null,
                'error' => 'PDF file not found.',
            ];
        }

        try {
            $parser = new Parser();
            $pdf = $parser->parseFile($filePath);
            $text = $pdf->getText();

            $text = trim($text);

            if (empty($text)) {
                return [
                    'success' => false,
                    'content' => null,
                    'error' => 'The PDF appears to be empty or contains no extractable text.',
                ];
            }

            return [
                'success' => true,
                'content' => $text,
                'error' => null,
            ];
        } catch (\Exception $e) {
            Log::error('PDF extraction error: ' . $e->getMessage(), [
                'file' => $filePath,
            ]);

            return [
                'success' => false,
                'content' => null,
                'error' => 'Failed to extract text from PDF: ' . $e->getMessage(),
            ];
        }
    }
}