import 'dart:io';

import 'package:flutter/services.dart';

/// Platform OCR backend. Uses Windows built-in OCR on desktop Windows.
class OcrEngine {
  static const _channel = MethodChannel('badnote/ocr');

  /// Recognize text from a PNG image. Returns null when unavailable or empty.
  static Future<String?> recognizeImage(Uint8List pngBytes) async {
    if (!Platform.isWindows) return null;
    try {
      final result = await _channel.invokeMethod<String>('recognize', pngBytes);
      final text = result?.trim();
      if (text == null || text.isEmpty) return null;
      return text;
    } catch (_) {
      return null;
    }
  }
}