enum UnitSystem { metric, imperial }

extension UnitSystemValue on UnitSystem {
  String get value {
    switch (this) {
      case UnitSystem.imperial:
        return 'imperial';
      case UnitSystem.metric:
        return 'metric';
    }
  }
}

class AppSettings {
  static const Object _unset = Object();

  final bool clearPathOnMaxRetry;
  final bool mapShowRepeaters;
  final bool mapShowChatNodes;
  final bool mapShowOtherNodes;
  final double mapTimeFilterHours; // 0 = all time
  final bool mapKeyPrefixEnabled;
  final String mapKeyPrefix;
  final bool mapShowMarkers;
  final bool mapShowGuessedLocations;
  final bool enableMessageTracing;
  final Map<String, double>? mapCacheBounds;
  final int mapCacheMinZoom;
  final int mapCacheMaxZoom;
  final bool notificationsEnabled;
  final bool notifyOnNewMessage;
  final bool notifyOnNewChannelMessage;
  final bool notifyOnNewAdvert;
  final bool autoRouteRotationEnabled;
  final String themeMode;
  final String? languageOverride; // null = system default
  final bool appDebugLogEnabled;
  final Map<String, String> batteryChemistryByDeviceId;
  final Map<String, String> batteryChemistryByRepeaterId;
  final UnitSystem unitSystem;
  final Set<String> mutedChannels;

  AppSettings({
    this.clearPathOnMaxRetry = false,
    this.mapShowRepeaters = true,
    this.mapShowChatNodes = true,
    this.mapShowOtherNodes = true,
    this.mapTimeFilterHours = 0, // Default to all time
    this.mapKeyPrefixEnabled = false,
    this.mapKeyPrefix = '',
    this.mapShowMarkers = true,
    this.mapShowGuessedLocations = true,
    this.enableMessageTracing = false,
    this.mapCacheBounds,
    this.mapCacheMinZoom = 10,
    this.mapCacheMaxZoom = 15,
    this.notificationsEnabled = true,
    this.notifyOnNewMessage = true,
    this.notifyOnNewChannelMessage = true,
    this.notifyOnNewAdvert = true,
    this.autoRouteRotationEnabled = false,
    this.themeMode = 'system',
    this.languageOverride,
    this.appDebugLogEnabled = false,
    Map<String, String>? batteryChemistryByDeviceId,
    Map<String, String>? batteryChemistryByRepeaterId,
    this.unitSystem = UnitSystem.metric,
    Set<String>? mutedChannels,
  }) : batteryChemistryByDeviceId = batteryChemistryByDeviceId ?? {},
       batteryChemistryByRepeaterId = batteryChemistryByRepeaterId ?? {},
       mutedChannels = mutedChannels ?? {};

  Map<String, dynamic> toJson() {
    return {
      'clear_path_on_max_retry': clearPathOnMaxRetry,
      'map_show_repeaters': mapShowRepeaters,
      'map_show_chat_nodes': mapShowChatNodes,
      'map_show_other_nodes': mapShowOtherNodes,
      'map_time_filter_hours': mapTimeFilterHours,
      'map_key_prefix_enabled': mapKeyPrefixEnabled,
      'map_key_prefix': mapKeyPrefix,
      'map_show_markers': mapShowMarkers,
      'map_show_guessed_locations': mapShowGuessedLocations,
      'enable_message_tracing': enableMessageTracing,
      'map_cache_bounds': mapCacheBounds,
      'map_cache_min_zoom': mapCacheMinZoom,
      'map_cache_max_zoom': mapCacheMaxZoom,
      'notifications_enabled': notificationsEnabled,
      'notify_on_new_message': notifyOnNewMessage,
      'notify_on_new_channel_message': notifyOnNewChannelMessage,
      'notify_on_new_advert': notifyOnNewAdvert,
      'auto_route_rotation_enabled': autoRouteRotationEnabled,
      'theme_mode': themeMode,
      'language_override': languageOverride,
      'app_debug_log_enabled': appDebugLogEnabled,
      'battery_chemistry_by_device_id': batteryChemistryByDeviceId,
      'battery_chemistry_by_repeater_id': batteryChemistryByRepeaterId,
      'unit_system': unitSystem.value,
      'muted_channels': mutedChannels.toList(),
    };
  }

  factory AppSettings.fromJson(Map<String, dynamic> json) {
    UnitSystem parseUnitSystem(dynamic value) {
      if (value is String && value.toLowerCase() == 'imperial') {
        return UnitSystem.imperial;
      }
      return UnitSystem.metric;
    }

    return AppSettings(
      clearPathOnMaxRetry: json['clear_path_on_max_retry'] as bool? ?? false,
      mapShowRepeaters: json['map_show_repeaters'] as bool? ?? true,
      mapShowChatNodes: json['map_show_chat_nodes'] as bool? ?? true,
      mapShowOtherNodes: json['map_show_other_nodes'] as bool? ?? true,
      mapTimeFilterHours:
          (json['map_time_filter_hours'] as num?)?.toDouble() ?? 0,
      mapKeyPrefixEnabled: json['map_key_prefix_enabled'] as bool? ?? false,
      mapKeyPrefix: json['map_key_prefix'] as String? ?? '',
      mapShowMarkers: json['map_show_markers'] as bool? ?? true,
      mapShowGuessedLocations:
          json['map_show_guessed_locations'] as bool? ?? true,
      enableMessageTracing: json['enable_message_tracing'] as bool? ?? false,
      mapCacheBounds: (json['map_cache_bounds'] as Map?)?.map(
        (key, value) => MapEntry(key.toString(), (value as num).toDouble()),
      ),
      mapCacheMinZoom: json['map_cache_min_zoom'] as int? ?? 10,
      mapCacheMaxZoom: json['map_cache_max_zoom'] as int? ?? 15,
      notificationsEnabled: json['notifications_enabled'] as bool? ?? true,
      notifyOnNewMessage: json['notify_on_new_message'] as bool? ?? true,
      notifyOnNewChannelMessage:
          json['notify_on_new_channel_message'] as bool? ?? true,
      notifyOnNewAdvert: json['notify_on_new_advert'] as bool? ?? true,
      autoRouteRotationEnabled:
          json['auto_route_rotation_enabled'] as bool? ?? false,
      themeMode: json['theme_mode'] as String? ?? 'system',
      languageOverride: json['language_override'] as String?,
      appDebugLogEnabled: json['app_debug_log_enabled'] as bool? ?? false,
      batteryChemistryByDeviceId:
          (json['battery_chemistry_by_device_id'] as Map?)?.map(
            (key, value) => MapEntry(key.toString(), value.toString()),
          ) ??
          {},
      batteryChemistryByRepeaterId:
          (json['battery_chemistry_by_repeater_id'] as Map?)?.map(
            (key, value) => MapEntry(key.toString(), value.toString()),
          ) ??
          {},
      unitSystem: parseUnitSystem(json['unit_system']),
      mutedChannels:
          ((json['muted_channels'] as List?)
              ?.map((e) => e.toString())
              .toSet()) ??
          {},
    );
  }

  AppSettings copyWith({
    bool? clearPathOnMaxRetry,
    bool? mapShowRepeaters,
    bool? mapShowChatNodes,
    bool? mapShowOtherNodes,
    double? mapTimeFilterHours,
    bool? mapKeyPrefixEnabled,
    String? mapKeyPrefix,
    bool? mapShowMarkers,
    bool? mapShowGuessedLocations,
    bool? enableMessageTracing,
    Object? mapCacheBounds = _unset,
    int? mapCacheMinZoom,
    int? mapCacheMaxZoom,
    bool? notificationsEnabled,
    bool? notifyOnNewMessage,
    bool? notifyOnNewChannelMessage,
    bool? notifyOnNewAdvert,
    bool? autoRouteRotationEnabled,
    String? themeMode,
    Object? languageOverride = _unset,
    bool? appDebugLogEnabled,
    Map<String, String>? batteryChemistryByDeviceId,
    Map<String, String>? batteryChemistryByRepeaterId,
    UnitSystem? unitSystem,
    Set<String>? mutedChannels,
  }) {
    return AppSettings(
      clearPathOnMaxRetry: clearPathOnMaxRetry ?? this.clearPathOnMaxRetry,
      mapShowRepeaters: mapShowRepeaters ?? this.mapShowRepeaters,
      mapShowChatNodes: mapShowChatNodes ?? this.mapShowChatNodes,
      mapShowOtherNodes: mapShowOtherNodes ?? this.mapShowOtherNodes,
      mapTimeFilterHours: mapTimeFilterHours ?? this.mapTimeFilterHours,
      mapKeyPrefixEnabled: mapKeyPrefixEnabled ?? this.mapKeyPrefixEnabled,
      mapKeyPrefix: mapKeyPrefix ?? this.mapKeyPrefix,
      mapShowMarkers: mapShowMarkers ?? this.mapShowMarkers,
      mapShowGuessedLocations:
          mapShowGuessedLocations ?? this.mapShowGuessedLocations,
      enableMessageTracing: enableMessageTracing ?? this.enableMessageTracing,
      mapCacheBounds: mapCacheBounds == _unset
          ? this.mapCacheBounds
          : mapCacheBounds as Map<String, double>?,
      mapCacheMinZoom: mapCacheMinZoom ?? this.mapCacheMinZoom,
      mapCacheMaxZoom: mapCacheMaxZoom ?? this.mapCacheMaxZoom,
      notificationsEnabled: notificationsEnabled ?? this.notificationsEnabled,
      notifyOnNewMessage: notifyOnNewMessage ?? this.notifyOnNewMessage,
      notifyOnNewChannelMessage:
          notifyOnNewChannelMessage ?? this.notifyOnNewChannelMessage,
      notifyOnNewAdvert: notifyOnNewAdvert ?? this.notifyOnNewAdvert,
      autoRouteRotationEnabled:
          autoRouteRotationEnabled ?? this.autoRouteRotationEnabled,
      themeMode: themeMode ?? this.themeMode,
      languageOverride: languageOverride == _unset
          ? this.languageOverride
          : languageOverride as String?,
      appDebugLogEnabled: appDebugLogEnabled ?? this.appDebugLogEnabled,
      batteryChemistryByDeviceId:
          batteryChemistryByDeviceId ?? this.batteryChemistryByDeviceId,
      batteryChemistryByRepeaterId:
          batteryChemistryByRepeaterId ?? this.batteryChemistryByRepeaterId,
      unitSystem: unitSystem ?? this.unitSystem,
      mutedChannels: mutedChannels ?? this.mutedChannels,
    );
  }
}