/// Runtime config from `.env`, with optional `--dart-define` overrides.
library;

import 'package:flutter_dotenv/flutter_dotenv.dart';

/// Loads once at startup from the `.env` asset (see `.env.example`).
/// Pass `--dart-define=KEY=value` to override for CI / one-off builds.
abstract final class AppConfig {
  static var _loaded = false;

  static late String apiBaseUrl;
  static late String pocketBaseUrl;
  static late String pocketBaseUsersCollection;

  static Future<void> load() async {
    if (_loaded) return;
    try {
      await dotenv.load(fileName: '.env', isOptional: true);
      if (dotenv.env.isEmpty) {
        await dotenv.load(fileName: '.env.example', isOptional: true);
      }
    } catch (_) {
      // Missing asset in tests is fine — use fallbacks / loadForTest.
    }

    apiBaseUrl = _resolve(
      dartDefine: const String.fromEnvironment('API_BASE_URL'),
      envKey: 'API_BASE_URL',
      fallback: 'https://ingtrak.satoshinakamoto.win',
    );
    pocketBaseUrl = _resolve(
      dartDefine: const String.fromEnvironment('POCKETBASE_URL'),
      envKey: 'POCKETBASE_URL',
      fallback: 'http://127.0.0.1:8090',
    );
    pocketBaseUsersCollection = _resolve(
      dartDefine: const String.fromEnvironment('POCKETBASE_USERS_COLLECTION'),
      envKey: 'POCKETBASE_USERS_COLLECTION',
      fallback: 'usersapp',
    );
    _loaded = true;
  }

  /// For widget tests that don't go through [main].
  static void loadForTest({
    String apiBaseUrl = 'https://ingtrak.satoshinakamoto.win',
    String pocketBaseUrl = 'http://127.0.0.1:8090',
    String pocketBaseUsersCollection = 'usersapp',
  }) {
    AppConfig.apiBaseUrl = apiBaseUrl;
    AppConfig.pocketBaseUrl = pocketBaseUrl;
    AppConfig.pocketBaseUsersCollection = pocketBaseUsersCollection;
    _loaded = true;
  }

  static String _resolve({
    required String dartDefine,
    required String envKey,
    required String fallback,
  }) {
    if (dartDefine.isNotEmpty) return dartDefine;
    final fromEnv = dotenv.maybeGet(envKey)?.trim();
    if (fromEnv != null && fromEnv.isNotEmpty) return fromEnv;
    return fallback;
  }
}