import 'dart:io';

import 'package:package_info_plus/package_info_plus.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';

class Env {
  static String get apiUrl {
    final backendUrl = const String.fromEnvironment('BACKEND_URL');
    if (backendUrl.isNotEmpty && backendUrl != 'false') {
      return backendUrl;
    }
    if (Platform.isAndroid) {
      return 'http://10.0.2.2:5775';
    }
    return 'http://localhost:5775';
  }

  static String get analyticsEndpoint => '$apiUrl/api/v1/analytics/events';

  static String version = '0.1.0';
  static int build = 1;
  static String deviceId = '';

  static Future<void> init() async {
    final info = await PackageInfo.fromPlatform();
    version = info.version;
    final buildStr = info.buildNumber.isEmpty ? '1' : info.buildNumber;
    build = int.tryParse(buildStr) ?? 1;

    deviceId = await _getOrCreateDeviceId();
  }

  static Future<String> _getOrCreateDeviceId() async {
    const storage = FlutterSecureStorage();
    var deviceId = await storage.read(key: 'device_id');
    if (deviceId == null || deviceId.isEmpty) {
      final prefs = await SharedPreferences.getInstance();
      deviceId = prefs.getString('device_id') ?? '';
      if (deviceId.isEmpty) {
        deviceId = 'install_${DateTime.now().millisecondsSinceEpoch}';
        await prefs.setString('device_id', deviceId);
      }
      await storage.write(key: 'device_id', value: deviceId);
    }
    return deviceId;
  }
}