rog_app/lib/screens/home/home_screen.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:flutter_map_location_marker/flutter_map_location_marker.dart';
import 'package:get/get.dart';
import 'package:latlong2/latlong.dart';
import 'package:rogapp/common/ui/widgets/uis.dart';
import 'package:rogapp/model/location_response.dart';
import 'package:rogapp/screens/home/home_controller.dart';
import 'package:rogapp/screens/home/location_controller.dart';
import 'package:rogapp/theme/theme.dart';
import 'package:rogapp/utils/db_helper.dart';
import 'package:rogapp/utils/text_util.dart';
import 'package:rogapp/widgets/base_layer_widget.dart';
import 'package:rogapp/widgets/bottom_sheet_new.dart';
import 'package:sqflite/sqflite.dart';

class HomeScreen extends StatelessWidget {
  HomeScreen({super.key});
  StreamSubscription? subscription;
  final HomeController homeController = Get.find<HomeController>();
  final LocationController locationController = Get.find<LocationController>();

  final double zoomThreshold = 0.08;
  final double boundsThreshold = 0.0005;

  LatLngBounds? lastBounds;
  double? lastZoom;


  Widget getMarkerShape(Feature i, BuildContext context){
    
    //print("lat is ${p.geoSerie!.geoPoints[0].latitude} and lon is ${p.geoSerie!.geoPoints[0].longitude}");
    RegExp regex = RegExp(r'([.]*0)(?!.*\d)');
    return Row(
                                      mainAxisAlignment: MainAxisAlignment.start,
                                      children: [
                                        InkWell(
                                          onTap: () {    
                                                  homeController.currentFeature.assign(i);                                        
                                                  if(homeController.currentFeature != null) {
                                                    showModalBottomSheet(
                                                      context: context, 
                                                      isScrollControlled: true, 
                                                      isDismissible: true,
                                                      builder:((context) => BottomSheetNew())
                                                      //builder:((context) => BottomSheetWidget())
                                                    ).whenComplete((){
                                                      locationController.skip_gps = false;
                                                    });
                                                  }




                                          },
                                          child: Container(
                                            height: 32,
                                            width: 32,
                                              decoration: BoxDecoration(
                                                shape: BoxShape.circle,
                                                color: Colors.transparent,
                                                border: Border.all(
                                                  color: i.properties!.buy_point! > 0 ? Colors.blue : Colors.red,
                                                  width: 3,
                                                  style: BorderStyle.solid
                                                )
                                              ),
                                              child: Stack(
                                                alignment: Alignment.center,
                                                children: [
                                                  Icon(Icons.circle,size: 6.0,),
                                                  i.properties!.cp == -1 ?
                                                    Transform.rotate(
                                                      alignment: Alignment.centerLeft,
                                                      origin: Offset.fromDirection(1, 26),
                                                      angle: 270 * pi / 180,
                                                      child: Icon(Icons.play_arrow_outlined, color: Colors.red, size: 70,)):
                                                    Container(color: Colors.transparent,),
                                                ],
                                              )
                                            ),
                                        ),
                                          Container(color: Colors.white, child: Text(TextUtils.getDisplayTextForFeature(i), style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color:Colors.red,))),
                                      ],
                                    );
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        actions: [
          TextButton(onPressed: () async {
            DatabaseHelper dbaseHelper = DatabaseHelper.instance;
              final res = await dbaseHelper.getFeatureByLatLon(35.807369, 137.240684);
              print(res[0].toString());
          }, 
          child: const Text("Click", style: TextStyle(color: Colors.white),))
        ],
      ),
      body: Obx(() => 
        FlutterMap(
            mapController: homeController.mapController,
          options: MapOptions(
            onMapReady: (){
                  homeController.mapController!.mapEventStream.listen((MapEvent mapEvent) {
                  if (mapEvent is MapEventMoveStart) {
                  }
                  if (mapEvent is MapEventMoveEnd) {
                    LatLngBounds bounds = homeController.mapController!.bounds!;
                    homeController.currentBound.assign(bounds);
                    final _cz = homeController.mapController.zoom;
                  }
                });
            } ,
            onPositionChanged: (position, hasGesture){
              if (hasGesture) { 
                LatLngBounds currentBounds = position.bounds!;

                if (lastBounds != null && lastZoom != null) {
                  // Compute difference between last bounds and current bounds
                  double boundsDifference = lastBounds!.north - currentBounds.north +
                                            lastBounds!.south - currentBounds.south +
                                            lastBounds!.east - currentBounds.east +
                                            lastBounds!.west - currentBounds.west;

                  // Compute difference between last zoom and current zoom
                  double zoomDifference = lastZoom! - position.zoom!;

                  if (boundsDifference.abs() > boundsThreshold || zoomDifference.abs() > zoomThreshold) {
                    LatLngBounds bounds = homeController.mapController!.bounds!;
                    homeController.currentBound.assign(bounds);
                    print('----threshold reached ---');
                    homeController.fetchLocalLocationForBound(bounds);
                    //loadData(position.bounds); // Load new data when either threshold is exceeded
                  }
                } else {
                  LatLngBounds bounds = homeController.mapController!.bounds!;
                  homeController.currentBound.assign(bounds);
                  homeController.fetchLocalLocationForBound(bounds);
                  //loadData(position.bounds); // Load new data if this is the first time
                }

                lastBounds = currentBounds; // Update the last bounds
                lastZoom = position.zoom; // Update the last zoom

              }
            },
            bounds: homeController.currentBound.isNotEmpty ? homeController.currentBound[0]: LatLngBounds.fromPoints([LatLng(35.03999881162295, 136.40587119778962), LatLng(36.642756778706904, 137.95226720406063)]),
            zoom: 14,
            maxZoom:18.4,
            interactiveFlags: InteractiveFlag.pinchZoom | InteractiveFlag.drag,
          ),
          children: [
            const BaseLayer(),
            CurrentLocationLayer(), 
            homeController.currentFeaturesforBound.isNotEmpty ?
            MarkerLayer(
              markers:homeController.currentFeaturesforBound.map((i) {
                RegExp regex = RegExp(r'([.]*0)(?!.*\d)');
                    return Marker(
                      anchorPos: AnchorPos.exactly(Anchor(108.0, 18.0)),
                      height: 32.0,
                      width: 120.0,
                      point: LatLng(i.latitude!, i.longitude!),
                      builder: (ctx){
                        return getMarkerShape(i, context);
                      },
                    );
              }).toList(),
              )
              :
              Center(child: CircularProgressIndicator()),
          ],
          
        )
      ),
    );
  }
}