// MainActivity.kt
override fun onSaveInstanceState(outState: Bundle) {
    super.onSaveInstanceState(outState)
    binding.mapMain.onSaveInstanceState(outState)
}

override fun onLowMemory() {
    super.onLowMemory()
    binding.mapMain.onLowMemory()
}

private class MapViewLifecycleObserver(
    private val mapView: MapView,
    private val savedInstanceState: Bundle?
) : DefaultLifecycleObserver {
    override fun onCreate(owner: LifecycleOwner) {
        super.onCreate(owner)
        mapView.onCreate(savedInstanceState)
    }

    override fun onDestroy(owner: LifecycleOwner) {
        super.onDestroy(owner)
        mapView.onDestroy()
    }

    override fun onPause(owner: LifecycleOwner) {
        super.onPause(owner)
        mapView.onPause()
    }

    override fun onResume(owner: LifecycleOwner) {
        super.onResume(owner)
        mapView.onResume()
    }

    override fun onStart(owner: LifecycleOwner) {
        super.onStart(owner)
        mapView.onStart()
    }

    override fun onStop(owner: LifecycleOwner) {
        super.onStop(owner)
        mapView.onStop()
    }
}

// onCreate에서 LifecycleObserver 등록
lifecycle.addObserver(MapViewLifecycleObserver(binding.mapMain, savedInstanceState))

private class NaverMapProvider(
    private val trackingLocationSource: LocationSource,
    private var activityNaverMap: NaverMap? = null
) : OnMapReadyCallback {
    override fun onMapReady(naverMap: NaverMap) {
        activityNaverMap = naverMap.apply {
            mapType = NaverMap.MapType.Navi
            setLayerGroupEnabled(NaverMap.LAYER_GROUP_TRANSIT, false)
            setLayerGroupEnabled(NaverMap.LAYER_GROUP_BUILDING, true)
            isNightModeEnabled = true
            locationSource = trackingLocationSource
            locationTrackingMode = LocationTrackingMode.Follow
            addOnLocationChangeListener { location ->
                cameraPosition =
                    CameraPosition(LatLng(location.latitude, location.longitude), 16.0)
            }
            uiSettings.run {
                isCompassEnabled = false
                isScaleBarEnabled = false
                isZoomControlEnabled = false
                isLocationButtonEnabled = true
            }
        }
    }
}

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    binding = ActivityMainBinding.inflate(layoutInflater)
    setContentView(binding.root)
    // 여기에 NaverMapProvider 주입
    binding.mapMain.getMapAsync(NaverMapProvider(locationSource, naverMap))
}

// 내부 코드 보면 생성자에서 권한 요청함
locationSource = FusedLocationSource(this, LOCATION_PERMISSION_REQUEST_CODE)

// 권한 요청의 결과 받아오기
override fun onRequestPermissionsResult(
    requestCode: Int,
    permissions: Array<out String>,
    grantResults: IntArray
) {
    if (locationSource.onRequestPermissionsResult(requestCode, permissions, grantResults)) {
        // 권한 승인이 나오면 위치추적하고 아니면 일반지도모드
        naverMap?.locationTrackingMode =
            if (!locationSource.isActivated) LocationTrackingMode.None
            else LocationTrackingMode.Follow
    }
    super.onRequestPermissionsResult(requestCode, permissions, grantResults)
}

// NaverMap에서 실시간으로 위치를 받아와야하기에 NaverMap 객체에 locationSource 설정
activityNaverMap = naverMap.apply {
    /* etc */
    locationSource = trackingLocationSource
    /* etc */
}