package com.lucas_chen.locationautogooglemapv2;

import android.content.Intent;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptor;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

public class MapsActivity extends FragmentActivity implements GoogleApiClient.ConnectionCallbacks
        ,GoogleApiClient.OnConnectionFailedListener,LocationListener{


    private GoogleMap mMap;
    // Google API用戶端物件
    private GoogleApiClient googleApiClient;
    // Location請求物件
    private LocationRequest locationRequest;
    // 記錄目前最新的位置
    private Location currentLocation;
    // 顯示目前與儲存位置的標記物件
    private Marker currentMarker;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);


        setUpMapIfNeeded();
        // 建立Google API用戶端物件
        configGoogleApiClient();
        // 建立Location請求物件
        configLocationRequest();
        // 讀取記事儲存的座標
        Intent intent = getIntent();
        double lat = intent.getDoubleExtra("lat", 0.0);
        double lng = intent.getDoubleExtra("lng",0.0);
        // 如果記事已經儲存座標
        if(lat != 0.0 & lng != 0.0) {
            // 建立座標物件
            LatLng itemPlace = new LatLng(lat, lng);
            // 加入地圖標記
            addMarker(itemPlace, intent.getStringExtra("title"),
                    intent.getStringExtra("datetime"));
            // 移動地圖
            moveMap(itemPlace);
        }
        else {
            // 連線到Google API用戶端
            if(!googleApiClient.isConnected()) {
                googleApiClient.connect();
            }
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        setUpMapIfNeeded();
        // 連線到Google API用戶端
        if(!googleApiClient.isConnected() && currentMarker != null ){
            googleApiClient.connect();
        }
    }
    // 建立Google API用戶端物件
    private synchronized void configGoogleApiClient() {
        googleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }
    // 建立Location請求物件
    private void configLocationRequest() {
        locationRequest = new LocationRequest();
        // 設定讀取位置資訊的間隔時間為一秒（1000ms）
        locationRequest.setInterval(1000);
        // 設定讀取位置資訊最快的間隔時間為一秒（1000ms）
        locationRequest.setFastestInterval(1000);
        // 設定優先讀取高精確度的位置資訊（GPS）
        locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
    }
    // 移動地圖到參數指定的位置
    private void moveMap(LatLng place){
        // 建立地圖攝影機的位置物件
        CameraPosition cameraPosition = new CameraPosition.Builder()
                .target(place)
                .zoom(17)
                .build();

        // 使用動畫的效果移動地圖
        mMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
    }
    // 在地圖加入指定位置與標題的標記
    private  void addMarker(LatLng place ,String title,String snippet){
        BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher);

        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(place)
                .title(title)
                .snippet(snippet)
                .icon(icon);

        mMap.addMarker(markerOptions);
    }
    // ConnectionCallbacks
    @Override
    public void onConnected(Bundle bundle) {
        // 已經連線到Google Services
        // 啟動位置更新服務
        // 位置資訊更新的時候，應用程式會自動呼叫LocationListener.onLocationChanged
        LocationServices.FusedLocationApi.requestLocationUpdates(
                googleApiClient, locationRequest, MapsActivity.this);
    }
    // ConnectionCallbacks
    @Override
    public void onConnectionSuspended(int i) {
        // Google Services連線中斷
        // int參數是連線中斷的代號
    }
    // OnConnectionFailedListener
    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        // Google Services連線失敗
        // ConnectionResult參數是連線失敗的資訊
        int errorCode = connectionResult.getErrorCode();

        // 裝置沒有安裝Google Play服務
        if(errorCode == connectionResult.SERVICE_MISSING){
            Toast.makeText(this, R.string.google_play_service_missing,
                    Toast.LENGTH_LONG).show();
        }
    }
    // LocationListener
    @Override
    public void onLocationChanged(Location location) {
        // 位置改變
        // Location參數是目前的位置
        currentLocation = location;
        LatLng latLng = new LatLng(currentLocation.getLatitude(),currentLocation.getLongitude());

        // 設定目前位置的標記
        if (currentMarker == null ){
            currentMarker = mMap.addMarker(new MarkerOptions().position(latLng));
        }

        else {
            currentMarker.setPosition(latLng);
        }
        // 移動地圖到目前的位置
        moveMap(latLng);
    }
    //提升效能
    @Override
    protected void onPause() {
        super.onPause();

        // 移除位置請求服務
        if (googleApiClient.isConnected()){
            LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, this);
        }
    }
    @Override
    protected void onStop() {
        super.onStop();

        // 移除Google API用戶端連線
        if(googleApiClient.isConnected()){
            googleApiClient.disconnect();
        }
    }
    //這是原本的
    private void setUpMapIfNeeded() {
        // Do a null check to confirm that we have not already instantiated the map.
        if (mMap == null) {
            // Try to obtain the map from the SupportMapFragment.
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();
            // Check if we were successful in obtaining the map.
            if (mMap != null) {
                setUpMap();
            }
        }
    }
    private void setUpMap() {
        //原本的--
        //mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
        // 建立位置的座標物件
        LatLng place = new LatLng(25.033408, 121.564099);
        moveMap(place);
    }


}