import 'package:flutter_test/flutter_test.dart';

import 'package:dmc_app/domain/telemetry/drone_status.dart';

void main() {
  group('computeDroneStatus - connectionQuality', () {
    test('gruen bei LQ >=70% und SNR >=0dB', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 70,
        snrDb: 0,
        navMode: 0,
      );
      expect(status.connectionQuality, SignalLevel.green);
    });

    test('gelb bei LQ >=70% aber SNR <0dB (Rauschen trotz guter LQ)', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 90,
        snrDb: -1,
        navMode: 0,
      );
      expect(status.connectionQuality, SignalLevel.yellow);
    });

    test('gelb bei LQ zwischen 50% und 70%', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 60,
        snrDb: 5,
        navMode: 0,
      );
      expect(status.connectionQuality, SignalLevel.yellow);
    });

    test('rot bei LQ <50%', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 20,
        snrDb: 10,
        navMode: 0,
      );
      expect(status.connectionQuality, SignalLevel.red);
    });
  });

  group('computeDroneStatus - positionQuality', () {
    test('gruen bei >=8 Satelliten und HDOP <2.0', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 9,
        hdop: 1.5,
        linkQuality: 80,
        snrDb: 5,
        navMode: 0,
      );
      expect(status.positionQuality, SignalLevel.green);
    });

    test('gelb bei >=6 Satelliten und HDOP <5.0, aber nicht gruen-Schwelle', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 6,
        hdop: 3.0,
        linkQuality: 80,
        snrDb: 5,
        navMode: 0,
      );
      expect(status.positionQuality, SignalLevel.yellow);
    });

    test('rot ohne GPS-Fix, unabhaengig von Satelliten/HDOP', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: false,
        numSat: 12,
        hdop: 0.5,
        linkQuality: 80,
        snrDb: 5,
        navMode: 0,
      );
      expect(status.positionQuality, SignalLevel.red);
    });

    test('rot bei wenigen Satelliten trotz Fix', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 3,
        hdop: 8.0,
        linkQuality: 80,
        snrDb: 5,
        navMode: 0,
      );
      expect(status.positionQuality, SignalLevel.red);
    });
  });

  group('computeDroneStatus - state', () {
    test('error hat Vorrang, sobald navMode Emergency (15) ist', () {
      final status = computeDroneStatus(
        connected: true,
        armed: true,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 80,
        snrDb: 5,
        navMode: 15,
      );
      expect(status.state, DroneState.error);
    });

    test('waypoint, wenn armed und navMode Waypoint mission (3)', () {
      final status = computeDroneStatus(
        connected: true,
        armed: true,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 80,
        snrDb: 5,
        navMode: 3,
      );
      expect(status.state, DroneState.waypoint);
    });

    test('armed, wenn armed aber kein Waypoint-Modus (z.B. Hold)', () {
      final status = computeDroneStatus(
        connected: true,
        armed: true,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 80,
        snrDb: 5,
        navMode: 1,
      );
      expect(status.state, DroneState.armed);
    });

    test('ready, wenn nicht armed aber GPS-Fix vorhanden', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 80,
        snrDb: 5,
        navMode: 0,
      );
      expect(status.state, DroneState.ready);
    });

    test('idle, wenn nicht armed und kein GPS-Fix', () {
      final status = computeDroneStatus(
        connected: true,
        armed: false,
        hasFix: false,
        numSat: 0,
        hdop: 99.99,
        linkQuality: 80,
        snrDb: 5,
        navMode: 0,
      );
      expect(status.state, DroneState.idle);
    });
  });

  group('computeDroneStatus - connected: false (Doku: "Statuspille ... muss '
      'eine rote Drohne, eine rote Verbindungsqualität und den Status text '
      'in rot disconnected anzeigen")', () {
    test('state ist disconnected, unabhaengig von allen anderen Werten', () {
      final status = computeDroneStatus(
        connected: false,
        armed: true,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 80,
        snrDb: 5,
        // Emergency-navMode haette ohne den connected-Vorrang "error"
        // ergeben statt "disconnected".
        navMode: 15,
      );
      expect(status.state, DroneState.disconnected);
    });

    test('connectionQuality ist rot, unabhaengig von linkQuality/snrDb', () {
      final status = computeDroneStatus(
        connected: false,
        armed: false,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        // Waeren an sich beste Werte (gruen) - werden von connected:false
        // trotzdem uebersteuert.
        linkQuality: 100,
        snrDb: 20,
        navMode: 0,
      );
      expect(status.connectionQuality, SignalLevel.red);
    });

    test('positionQuality folgt weiterhin den (eingefrorenen) Telemetriewerten '
        '- nur Drohne/Verbindungsqualitaet werden per Doku explizit rot '
        'gefordert', () {
      final status = computeDroneStatus(
        connected: false,
        armed: false,
        hasFix: true,
        numSat: 10,
        hdop: 1.0,
        linkQuality: 0,
        snrDb: -99,
        navMode: 0,
      );
      expect(status.positionQuality, SignalLevel.green);
    });
  });
}