import 'package:dmc_app/domain/mission/route_geometry.dart';
import 'package:dmc_app/domain/waypoint/flat_waypoint_list.dart';
import 'package:flutter_test/flutter_test.dart';

Waypoint _wp(double lat, double lon, {double alt = 60, double speed = 15}) =>
    Waypoint(lat: lat, lon: lon, altitudeM: alt, speedMs: speed, catchRadiusM: 60);

void main() {
  group('buildRouteGeometry', () {
    const params = (minTurnRadius: 35.0, maxClimbRate: 5.0, maxDescentRate: 6.0);

    test('leere Wegpunktliste liefert leere Geometrie', () {
      final geometry = buildRouteGeometry(
        const [],
        minTurnRadius: params.minTurnRadius,
        maxClimbRate: params.maxClimbRate,
        maxDescentRate: params.maxDescentRate,
      );

      expect(geometry.segments, isEmpty);
      expect(geometry.vertexBad, isEmpty);
    });

    test('zwei Wegpunkte ergeben eine einzelne Geradenverbindung', () {
      final geometry = buildRouteGeometry(
        [_wp(0, 0), _wp(0, 0.01)],
        minTurnRadius: params.minTurnRadius,
        maxClimbRate: params.maxClimbRate,
        maxDescentRate: params.maxDescentRate,
      );

      expect(geometry.segments, hasLength(1));
      expect(geometry.segments.single.bad, isFalse);
      expect(geometry.vertexBad, [false, false]);
    });

    test('sanfte 90-Grad-Kurve mit ausreichend Platz ist fliegbar', () {
      final geometry = buildRouteGeometry(
        [_wp(0, 0), _wp(0, 0.01), _wp(0.01, 0.01)],
        minTurnRadius: params.minTurnRadius,
        maxClimbRate: params.maxClimbRate,
        maxDescentRate: params.maxDescentRate,
      );

      expect(geometry.vertexBad[1], isFalse);
      // Gerade -> Bogen -> Gerade.
      expect(geometry.segments, hasLength(3));
      expect(geometry.segments[1].points.length, greaterThan(2));
    });

    test('scharfe Kehrtwende ueberschreitet den maximalen Kurswinkel', () {
      final geometry = buildRouteGeometry(
        [_wp(0, 0), _wp(0, 0.01), _wp(0, 0.001)],
        minTurnRadius: params.minTurnRadius,
        maxClimbRate: params.maxClimbRate,
        maxDescentRate: params.maxDescentRate,
      );

      expect(geometry.vertexBad[1], isTrue);
    });

    test('zu steiler Sinkflug markiert das Geradenstueck als bad', () {
      // ~1113 m horizontal bei 15 m/s ~ 74s Flugzeit; 500 m Sinken darin
      // ergibt eine Sinkrate weit ueber der maxDescentRate von 6 m/s.
      final geometry = buildRouteGeometry(
        [_wp(0, 0, alt: 500), _wp(0, 0.01, alt: 0)],
        minTurnRadius: params.minTurnRadius,
        maxClimbRate: params.maxClimbRate,
        maxDescentRate: params.maxDescentRate,
      );

      expect(geometry.segments.single.bad, isTrue);
    });
  });
}