import 'dart:io';

import 'package:dotenv/dotenv.dart';

class ServerEnv {
  ServerEnv._(this.databaseUrl, this.port, this.firebaseWebApiKey);

  final String databaseUrl;
  final int port;
  final String firebaseWebApiKey;

  static ServerEnv load() {
    final DotEnv env = DotEnv(includePlatformEnvironment: true)
      ..load(['.env']);

    final String? databaseUrl = env['DATABASE_URL'];
    if (databaseUrl == null || databaseUrl.isEmpty) {
      stderr.writeln('DATABASE_URL is required in server/.env');
      exit(1);
    }

    final String? apiKey = env['FIREBASE_WEB_API_KEY'];
    if (apiKey == null || apiKey.isEmpty) {
      stderr.writeln('FIREBASE_WEB_API_KEY is required in server/.env');
      exit(1);
    }

    final int port = int.tryParse(env['PORT'] ?? '3000') ?? 3000;

    return ServerEnv._(databaseUrl, port, apiKey);
  }
}