import 'package:http/http.dart' as http;

/// Platform-neutral HTTP client wrapping the internal API base URL.
/// Base URL is read from the FLUTTER_API_URL_INTERNAL environment variable
/// (set by Docker) or falls back to localhost for local development.
class ApiClient {
  final String baseUrl;
  final http.Client _client;

  ApiClient({http.Client? client})
      : baseUrl = const String.fromEnvironment(
          'API_BASE_URL',
          defaultValue: 'http://localhost:8080',
        ),
        _client = client ?? http.Client();

  Map<String, String> _headers({String? token}) => {
        'Content-Type': 'application/json',
        if (token != null) 'Authorization': 'Bearer $token',
      };

  Future<http.Response> get(String path, {String? token}) =>
      _client.get(Uri.parse('$baseUrl$path'), headers: _headers(token: token));

  Future<http.Response> post(String path, String body, {String? token}) =>
      _client.post(Uri.parse('$baseUrl$path'),
          headers: _headers(token: token), body: body);

  Future<http.Response> put(String path, String body, {String? token}) =>
      _client.put(Uri.parse('$baseUrl$path'),
          headers: _headers(token: token), body: body);

  Future<http.Response> delete(String path, {String? token}) =>
      _client.delete(Uri.parse('$baseUrl$path'),
          headers: _headers(token: token));
}