import 'dart:convert';

import '../../domain/mission/terrain_math.dart';

/// JSON-(De-)Serialisierung fuer [TerrainProfile] - gemeinsam genutzt von
/// der Missions-Persistenz ([MissionRepository]) und dem Mission-Sharing
/// ([MissionShareCodec]), analog waypoint_json_codec.dart.
Map<String, dynamic> terrainProfileToJson(TerrainProfile profile) => {
      'routeKey': profile.routeKey,
      'points': [
        for (final p in profile.points)
          {'distanceM': p.distanceM, 'elevationRelM': p.elevationRelM},
      ],
    };

TerrainProfile terrainProfileFromJson(Map<String, dynamic> json) => TerrainProfile(
      routeKey: json['routeKey'] as String,
      points: [
        for (final entry in json['points'] as List)
          TerrainSamplePoint(
            distanceM: (entry['distanceM'] as num).toDouble(),
            elevationRelM: (entry['elevationRelM'] as num?)?.toDouble(),
          ),
      ],
    );

String encodeTerrainProfile(TerrainProfile profile) =>
    jsonEncode(terrainProfileToJson(profile));

TerrainProfile decodeTerrainProfile(String json) =>
    terrainProfileFromJson(jsonDecode(json) as Map<String, dynamic>);