<?php

namespace App\Services\Ocr;

use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Process;

class TesseractOcrDriver implements OcrDriver
{
    public function recognize(string $imagePath): string
    {
        if (! is_file($imagePath)) {
            return '';
        }

        $bin = (string) config('coruna.ocr.tesseract', 'tesseract');
        $oem = max(0, (int) config('coruna.ocr.oem', 1));
        $psm = max(0, (int) config('coruna.ocr.psm', 6));
        $result = Process::timeout(90)->run([
            $bin,
            $imagePath,
            'stdout',
            '-l', 'eng',
            '--oem', (string) $oem,
            '--psm', (string) $psm,
        ]);

        if (! $result->successful()) {
            Log::channel('stack')->warning('tesseract ocr failed', [
                'path' => $imagePath,
                'error' => mb_substr($result->errorOutput() ?: $result->output(), 0, 500),
            ]);

            return '';
        }

        return trim($result->output());
    }
}