import 'package:please_pay_me/core/config/env_file.dart';

/// Runtime configuration.
///
/// Values are resolved in this order:
/// 1. `--dart-define=PPM_*` / `--dart-define-from-file=.env` (CI and `run.ps1`)
/// 2. key/value map parsed from `mobile/.env` (tests and explicit loaders)
/// 3. production cabinet if nothing is set
class AppConfig {
  static const productionOrigin = 'https://please-pay-me.ru';

  const AppConfig({
    required this.apiBaseUrl,
    required this.webCabinetUrl,
    this.demoMode = false,
  });

  factory AppConfig.fromEnvironment({Map<String, String> file = const {}}) {
    const definedApi = String.fromEnvironment('PPM_API_BASE_URL');
    const definedWeb = String.fromEnvironment('PPM_WEB_URL');
    const definedDemo = String.fromEnvironment('PPM_DEMO');

    return AppConfig.fromMap({
      ...file,
      if (definedApi.isNotEmpty) 'PPM_API_BASE_URL': definedApi,
      if (definedWeb.isNotEmpty) 'PPM_WEB_URL': definedWeb,
      if (definedDemo.isNotEmpty) 'PPM_DEMO': definedDemo,
    });
  }

  factory AppConfig.fromMap(Map<String, String> values) {
    final apiBase = normalizeUrl(values['PPM_API_BASE_URL'] ?? '');
    final webUrl = normalizeUrl(values['PPM_WEB_URL'] ?? '');
    final demoForced = parseEnvFlag(values['PPM_DEMO']);
    final resolvedApi = apiBase.isEmpty ? productionOrigin : apiBase;
    final resolvedWeb = webUrl.isEmpty ? resolvedApi : webUrl;

    return AppConfig(
      apiBaseUrl: resolvedApi,
      webCabinetUrl: resolvedWeb,
      demoMode: demoForced,
    );
  }

  static const demo = AppConfig(apiBaseUrl: '', webCabinetUrl: '', demoMode: true);

  final String apiBaseUrl;
  final String webCabinetUrl;
  final bool demoMode;

  AppConfig copyWith({String? apiBaseUrl, String? webCabinetUrl, bool? demoMode}) {
    return AppConfig(
      apiBaseUrl: apiBaseUrl ?? this.apiBaseUrl,
      webCabinetUrl: webCabinetUrl ?? this.webCabinetUrl,
      demoMode: demoMode ?? this.demoMode,
    );
  }
}