import 'dart:typed_data';

import 'package:flutter_test/flutter_test.dart';

import 'package:dmc_app/transport/link_transport.dart';
import 'package:dmc_app/transport/loopback/loopback_transport.dart';

void main() {
  test('connect() durchlaeuft connecting -> connected', () async {
    final transport = LoopbackTransport();
    final states = <LinkState>[];
    transport.state.listen(states.add);

    await transport.connect();
    await Future<void>.delayed(Duration.zero);

    expect(states, [LinkState.connecting, LinkState.connected]);
    transport.dispose();
  });

  test('feed() eingespeiste Bytes kommen ueber incoming an', () async {
    final transport = LoopbackTransport();
    await transport.connect();

    final received = <Uint8List>[];
    transport.incoming.listen(received.add);

    transport.feed(Uint8List.fromList([1, 2, 3]));
    await Future<void>.delayed(Duration.zero);

    expect(received, [
      Uint8List.fromList([1, 2, 3]),
    ]);
    transport.dispose();
  });

  test('send() sammelt gesendete Bytes in sentData', () async {
    final transport = LoopbackTransport();
    await transport.connect();

    await transport.send(Uint8List.fromList([9, 9]));

    expect(transport.sentData, [
      Uint8List.fromList([9, 9]),
    ]);
    transport.dispose();
  });

  test('simulateError() meldet Grund/Nachricht und LinkState.error', () async {
    final transport = LoopbackTransport();
    await transport.connect();

    transport.simulateError(LinkErrorReason.connectionFailed, 'Testfehler');

    expect(transport.lastErrorReason, LinkErrorReason.connectionFailed);
    expect(transport.lastErrorMessage, 'Testfehler');
    expect(transport.currentState, LinkState.error);
    transport.dispose();
  });

  test('disconnect() setzt LinkState.disconnected', () async {
    final transport = LoopbackTransport();
    await transport.connect();

    await transport.disconnect();

    expect(transport.currentState, LinkState.disconnected);
    transport.dispose();
  });
}