import 'dart:convert';

import 'package:flutter_test/flutter_test.dart';

import 'package:dmc_app/domain/waypoint/flat_waypoint_list.dart';
import 'package:dmc_app/services/sharing/mission_share_codec.dart';

void main() {
  const waypoints = [
    Waypoint(
      lat: 48.1351,
      lon: 11.5820,
      altitudeM: 60,
      speedMs: 15,
      catchRadiusM: 60,
      windSpeedMs: 4,
      windDirFromDeg: 270,
      windElevationM: 520,
    ),
    Waypoint(
      lat: 48.1360,
      lon: 11.5830,
      altitudeM: 120,
      speedMs: 20,
      catchRadiusM: 60,
      action: WaypointAction.loiter,
    ),
  ];

  group('buildMissionExportJson / parseMissionImportJson', () {
    test('round-trip erhaelt Name, Ort und alle Wegpunktfelder', () {
      final json = buildMissionExportJson(MissionExportData(
        name: 'Munich Loop',
        placeName: 'Munich',
        createdAt: DateTime.utc(2026, 1, 1),
        waypoints: waypoints,
      ));

      final parsed = parseMissionImportJson(json);

      expect(parsed.name, 'Munich Loop');
      expect(parsed.placeName, 'Munich');
      expect(parsed.versionMismatch, isNull);
      expect(parsed.waypoints, hasLength(2));
      expect(parsed.waypoints[0].lat, waypoints[0].lat);
      expect(parsed.waypoints[0].windSpeedMs, 4);
      expect(parsed.waypoints[1].action, WaypointAction.loiter);
    });

    test('fehlende appVersion-Uebereinstimmung wird als Mismatch erkannt', () {
      final json = buildMissionExportJson(MissionExportData(
        name: 'Old export',
        placeName: null,
        createdAt: DateTime.utc(2020, 1, 1),
        waypoints: waypoints,
      )).replaceFirst('"1.0.0"', '"2.4.1"');

      final parsed = parseMissionImportJson(json);

      expect(parsed.versionMismatch, '2.4.1');
    });

    test('Datei ohne "appVersion"-Umschlag (nur das rohe mission-Objekt) wird akzeptiert', () {
      final rawMission = {
        'name': 'Bare mission',
        'waypoints': [
          {
            'lat': 1.0,
            'lon': 2.0,
            'altitudeM': 60.0,
            'speedMs': 15.0,
            'catchRadiusM': 60.0,
            'action': 'none',
          },
        ],
      };
      final parsed = parseMissionImportJson(jsonEncode(rawMission));
      expect(parsed.name, 'Bare mission');
      expect(parsed.waypoints, hasLength(1));
    });

    test('wirft FormatException bei ungueltigem JSON', () {
      expect(() => parseMissionImportJson('not json'), throwsFormatException);
    });

    test('wirft FormatException wenn Wegpunkte fehlen', () {
      expect(
        () => parseMissionImportJson('{"mission": {"name": "Empty"}}'),
        throwsFormatException,
      );
    });

    test('fehlender Name faellt auf placeName, dann auf Standardtext zurueck', () {
      final withPlaceOnly = parseMissionImportJson(
        '{"mission": {"placeName": "Somewhere", "waypoints": [{"lat":1,"lon":1,'
        '"altitudeM":60,"speedMs":15,"catchRadiusM":60,"action":"none"}]}}',
      );
      expect(withPlaceOnly.name, 'Somewhere');

      final withNeither = parseMissionImportJson(
        '{"mission": {"waypoints": [{"lat":1,"lon":1,'
        '"altitudeM":60,"speedMs":15,"catchRadiusM":60,"action":"none"}]}}',
      );
      expect(withNeither.name, 'Imported mission');
    });
  });

  group('missionExportFilename', () {
    test('ersetzt Sonderzeichen durch Unterstriche', () {
      expect(missionExportFilename('Sankt Pölten / Nord'),
          'mission-Sankt_P_lten___Nord.json');
    });
  });
}