import 'dart:io';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:injectable/injectable.dart';
import 'package:package_info_plus/package_info_plus.dart';

@lazySingleton
class DeviceInfoService {
  DeviceInfoService(this._deviceInfo, this._packageInfo);

  final DeviceInfoPlugin _deviceInfo;
  final PackageInfo _packageInfo;

  String get appVersion => '${_packageInfo.version}+${_packageInfo.buildNumber}';

  Future<Map<String, String>> getDevicePayload() async {
    final info = await _getDeviceInfo();
    return {
      'device_id': info['device_id'] ?? '',
      'device_name': info['device_name'] ?? '',
      'device_type': info['device_type'] ?? 'mobile',
      'platform': _getPlatform(),
      'app_version': appVersion,
      'os_version': info['os_version'] ?? '',
    };
  }

  String _getPlatform() {
    if (Platform.isAndroid) return 'android';
    if (Platform.isIOS) return 'ios';
    return 'web';
  }

  Future<Map<String, String>> _getDeviceInfo() async {
    if (Platform.isAndroid) {
      final android = await _deviceInfo.androidInfo;
      return {
        'device_id': android.id,
        'device_name': '${android.manufacturer} ${android.model}',
        'device_type': _resolveDeviceType(android.model),
        'os_version': 'Android ${android.version.release} (SDK ${android.version.sdkInt})',
      };
    } else if (Platform.isIOS) {
      final ios = await _deviceInfo.iosInfo;
      return {
        'device_id': ios.identifierForVendor ?? '',
        'device_name': ios.name,
        'device_type': _resolveDeviceType(ios.model),
        'os_version': '${ios.systemName} ${ios.systemVersion}',
      };
    }
    return {'device_type': 'desktop'};
  }

  /// Deteksi device_type berdasarkan nama model
  /// Nilai valid: mobile | tablet | desktop
  String _resolveDeviceType(String model) {
    final lower = model.toLowerCase();
    if (lower.contains('tablet') || lower.contains('tab') || lower.contains('ipad')) {
      return 'tablet';
    }
    return 'mobile';
  }
}