rog_app/lib/pages/home/home_controller.dart

import 'package:flutter_map/plugin_api.dart';
import 'package:geojson/geojson.dart';
import 'package:get/get.dart';
import 'package:latlong2/latlong.dart';
import 'package:rogapp/pages/map/map_page.dart';
import 'package:rogapp/services/location_service.dart';
import 'package:rogapp/services/perfecture_service.dart';

class HomeController extends GetxController {

  List<GeoJsonFeatureCollection> locations = <GeoJsonFeatureCollection>[].obs;
  List<GeoJsonFeature> currentFeature = <GeoJsonFeature>[].obs;
  List<dynamic> perfectures = <dynamic>[].obs;
  List<LatLngBounds> currentBound = <LatLngBounds>[].obs;
  List<dynamic> subPerfs = <dynamic>[].obs;


  @override
  void onInit() {
    LocationService.loadLocations().then((value){
      locations.add(value!);
    });

    PerfectureService.loadPerfectures().then((value){
      perfectures.add(value);
    });
    
    super.onInit();

  }

   void getBoundFromLatLng(List<LatLng> list) {
    double? x0, x1, y0, y1;
    for (LatLng latLng in list) {
      if (x0 == null) {
        x0 = x1 = latLng.latitude;
        y0 = y1 = latLng.longitude;
      } else {
        if (latLng.latitude > x1!) x1 = latLng.latitude;
        if (latLng.latitude < x0) x0 = latLng.latitude;
        if (latLng.longitude > y1!) y1 = latLng.longitude;
        if (latLng.longitude < y0!) y0 = latLng.longitude;
      }
    }
    currentBound.clear();
    currentBound.add(LatLngBounds(LatLng(x1!, y1!), LatLng(x0!, y0!)));
  }

  void setBounds(){
    List<LatLng> lts = [];
    if(locations.length > 0){
          for(GeoJsonFeature i in locations[0].collection){
            GeoJsonMultiPoint p = i.geometry as GeoJsonMultiPoint;
            LatLng lt = LatLng(p.geoSerie!.geoPoints[0].latitude , p.geoSerie!.geoPoints[0].longitude) ;
            lts.add(lt);
        }
      }
      else{
        LatLng lt = LatLng(37.15319600454702, 139.58765950528198);
        lts.add(lt);
      }
      getBoundFromLatLng(lts);
  }

  void loadLocationforPerf(String perf){
    locations.clear();
    LocationService.loadLocationsFor(perf).then((value){
      locations.add(value!);
       setBounds();
       MapPage.mapController.fitBounds(currentBound[0]);
    });
  }

  String getSubInitialVal(){
    int min = 0;
    if(subPerfs.length > 0){
      min = subPerfs[0][0]['id'] as int;
      for(var sub in subPerfs[0]){
        int x = sub['id'] as int;
        if(x < min){
          min = x;
        }
      }
    }
    return min.toString();
  }

  void loadSubPerfFor(String perf){
    subPerfs.clear();
    PerfectureService.loadSubPerfectures(perf).then((value){
      subPerfs.add(value);
      print(subPerfs);
    });
  }

    GeoJsonFeature? getFeatureForLatLong(double lat, double long){
      if(locations.length > 0){
          for(GeoJsonFeature i in locations[0].collection){
            GeoJsonMultiPoint p = i.geometry as GeoJsonMultiPoint;
            if(p.geoSerie!.geoPoints[0].latitude == lat && p.geoSerie!.geoPoints[0].longitude  == long){
              return i;
          }
        }
      }
  }

  void makeNext(GeoJsonFeature fs){
    GeoJsonFeature<GeoJsonMultiPoint> pt = fs  as GeoJsonFeature<GeoJsonMultiPoint>;

    for(int i=0; i<= locations[0].collection.length - 1; i++){
      GeoJsonMultiPoint p = locations[0].collection[i].geometry as GeoJsonMultiPoint;

      if(p.geoSerie!.geoPoints[0].latitude == pt.geometry!.geoSerie!.geoPoints[0].latitude && p.geoSerie!.geoPoints[0].longitude  == pt.geometry!.geoSerie!.geoPoints[0].longitude ){
          
          if(currentFeature.length > 0){
            currentFeature.clear();
          }
          if(i >= locations[0].collection.length - 1 ){
            currentFeature.add(locations[0].collection[0] as GeoJsonFeature);
          }
          else{
            currentFeature.add(locations[0].collection[i + 1] as GeoJsonFeature);
          }
      }
    }

  }

  void makePrevious(GeoJsonFeature fs){
    GeoJsonFeature<GeoJsonMultiPoint> pt = fs  as GeoJsonFeature<GeoJsonMultiPoint>;

    for(int i=0; i<= locations[0].collection.length - 1; i++){
      GeoJsonMultiPoint p = locations[0].collection[i].geometry as GeoJsonMultiPoint;

      if(p.geoSerie!.geoPoints[0].latitude == pt.geometry!.geoSerie!.geoPoints[0].latitude && p.geoSerie!.geoPoints[0].longitude  == pt.geometry!.geoSerie!.geoPoints[0].longitude ){
          
          if(currentFeature.length > 0){
            currentFeature.clear();
          }
          if(i == 0 ){
            currentFeature.add(locations[0].collection[locations[0].collection.length -1] as GeoJsonFeature);
          }
          else{
            currentFeature.add(locations[0].collection[i - 1] as GeoJsonFeature);
          }
      }
    }

  }


  
}