dmc/app/lib/ui/providers/current_mission_provider.dart

import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../domain/waypoint/flat_waypoint_list.dart';

/// Haelt die Wegpunktliste der aktuell in Bearbeitung befindlichen Mission
/// (Architektur-Doku 3.2/3.6). Reaktiver Einzelwert im Sinne von 4.16 -
/// daher Riverpod statt Bloc; die App-Mode State Machine bleibt in
/// AppModeCubit.
class CurrentMissionNotifier extends Notifier<List<Waypoint>> {
  @override
  List<Waypoint> build() => [];

  void addWaypoint(Waypoint waypoint) {
    state = [...state, waypoint];
  }

  /// Aktualisiert die Position eines Wegpunkts (Drag-to-Reposition im
  /// Editier-Modus: Kartenverschieben bewegt den Zielpunkt live mit).
  void moveWaypoint(int index, double lat, double lon) {
    state = [
      for (var i = 0; i < state.length; i++)
        if (i == index) state[i].copyWith(lat: lat, lon: lon) else state[i],
    ];
  }

  /// Schaltet die Execute-Aktion eines Wegpunkts um (Halo-Radialmenue:
  /// erneutes Antippen derselben Aktion setzt sie zurueck auf "none").
  void toggleAction(int index, WaypointAction action) {
    state = [
      for (var i = 0; i < state.length; i++)
        if (i == index)
          state[i].copyWith(
            action:
                state[i].action == action ? WaypointAction.none : action,
          )
        else
          state[i],
    ];
  }

  void removeAt(int index) {
    state = [
      for (var i = 0; i < state.length; i++)
        if (i != index) state[i],
    ];
  }
}

final currentMissionProvider =
    NotifierProvider<CurrentMissionNotifier, List<Waypoint>>(
  CurrentMissionNotifier.new,
);