package com.mapbox.mapboxsdk.testapp.activity.geocoding;

import android.graphics.PointF;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Gravity;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;

import com.mapbox.mapboxsdk.annotations.MarkerOptions;
import com.mapbox.mapboxsdk.constants.Style;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Projection;
import com.mapbox.mapboxsdk.testapp.R;
import com.mapbox.services.commons.ServicesException;
import com.mapbox.services.commons.models.Position;
import com.mapbox.services.geocoding.v5.GeocodingCriteria;
import com.mapbox.services.geocoding.v5.MapboxGeocoding;
import com.mapbox.services.geocoding.v5.models.CarmenFeature;
import com.mapbox.services.geocoding.v5.models.GeocodingResponse;

import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class GeocoderActivity extends AppCompatActivity implements OnMapReadyCallback {

    private static final String LOG_TAG = "GeocoderActivity";

    private MapboxMap mapboxMap;
    private MapView mapView;
    private ImageView dropPinView;
    private TextView textView;

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

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
            actionBar.setDisplayShowHomeEnabled(true);
        }

        textView = (TextView) findViewById(R.id.message);
        setMessage(getString(R.string.geocoder_instructions));

        mapView = (MapView) findViewById(R.id.mapView);
        mapView.setStyleUrl(Style.MAPBOX_STREETS);
        mapView.onCreate(savedInstanceState);

        dropPinView = new ImageView(this);
        dropPinView.setImageResource(R.drawable.ic_droppin_24dp);
        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER);
        dropPinView.setLayoutParams(params);
        mapView.addView(dropPinView);
        mapView.getMapAsync(this);
    }

    @Override
    public void onMapReady(MapboxMap map) {
        mapboxMap = map;
        final Projection projection = mapboxMap.getProjection();
        final int width = mapView.getMeasuredWidth();
        final int height = mapView.getMeasuredHeight();

        // Click listener
        mapboxMap.setOnMapClickListener(new MapboxMap.OnMapClickListener() {
            @Override
            public void onMapClick(@NonNull LatLng point) {
                PointF centerPoint = new PointF(width / 2, (height + dropPinView.getHeight()) / 2);
                LatLng centerLatLng = new LatLng(projection.fromScreenLocation(centerPoint));

                setMessage("Geocoding...");

                mapboxMap.removeAnnotations();
                mapboxMap.addMarker(new MarkerOptions().position(centerLatLng));

                geocode(centerLatLng);
            }
        });
    }

    @Override
    public void onPause() {
        super.onPause();
        mapView.onPause();
    }

    @Override
    public void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mapView.onDestroy();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }

    /*
     * Forward geocoding
     */

    private void geocode(final LatLng point) {

        try {
            MapboxGeocoding client = new MapboxGeocoding.Builder()
                    .setAccessToken(getString(R.string.mapbox_access_token))
                    .setCoordinates(Position.fromCoordinates(point.getLongitude(), point.getLatitude()))
                    .setGeocodingType(GeocodingCriteria.TYPE_POI)
                    .build();

            client.enqueueCall(new Callback<GeocodingResponse>() {
                @Override
                public void onResponse(Call<GeocodingResponse> call, Response<GeocodingResponse> response) {

                    List<CarmenFeature> results = response.body().getFeatures();
                    if (results.size() > 0) {
                        String placeName = results.get(0).getPlaceName();
                        setSuccess(placeName);
                    } else {
                        setMessage("No results.");
                    }

                }

                @Override
                public void onFailure(Call<GeocodingResponse> call, Throwable t) {
                    setError(t.getMessage());
                }
            });
        } catch (ServicesException e) {
            Log.e(LOG_TAG, "Error geocoding: " + e.toString());
            e.printStackTrace();
            setError(e.getMessage());
        }
    }

    /*
     * Update text view
     */

    private void setMessage(String message) {
        Log.d(LOG_TAG, "Message: " + message);
        textView.setText(message);
    }

    private void setSuccess(String placeName) {
        Log.d(LOG_TAG, "Place name: " + placeName);
        textView.setText(placeName);
    }

    private void setError(String message) {
        Log.e(LOG_TAG, "Error: " + message);
        textView.setText("Error: " + message);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                onBackPressed();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
}