import 'package:analytics_sdk/utils/platform_storage.dart';
import 'package:analytics_sdk/utils/uuid_util.dart';
import 'package:flutter/services.dart';

const _kDeviceIdStorageKey = 'analytics_device_id.txt';
const _kNativeChannel = MethodChannel('analytics_sdk');

Future<String> generateOrLoadDeviceId() async {
  try {
    final nativeDeviceId =
        (await _kNativeChannel.invokeMethod<String>('getDeviceId'))?.trim() ??
            '';
    if (nativeDeviceId.isNotEmpty) return nativeDeviceId;
  } on MissingPluginException {
    // Desktop platforms may not implement this method; fall back to storage.
  } catch (_) {}

  try {
    final existing =
        (await PlatformStorage.read(_kDeviceIdStorageKey))?.trim() ?? '';
    if (existing.isNotEmpty) return existing;

    final generated = generateUuidV4();
    await PlatformStorage.write(_kDeviceIdStorageKey, generated);
    return generated;
  } catch (_) {
    return '';
  }
}