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

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.content.res.ResourcesCompat;
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.MenuItem;

import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
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.style.layers.CircleLayer;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.testapp.R;

import java.net.MalformedURLException;
import java.net.URL;

import static com.mapbox.mapboxsdk.style.layers.Filter.all;
import static com.mapbox.mapboxsdk.style.layers.Filter.gte;
import static com.mapbox.mapboxsdk.style.layers.Filter.lt;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textField;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textSize;

/**
 * Sample Activity to show off geojson source clustering and filter usage
 */
public class GeoJsonClusteringActivity extends AppCompatActivity {
    private static final String TAG = GeoJsonClusteringActivity.class.getSimpleName();

    private MapView mapView;
    private MapboxMap mapboxMap;

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

        setupActionBar();

        //Initialize map as normal
        mapView = (MapView) findViewById(R.id.mapView);
        //noinspection ConstantConditions
        mapView.onCreate(savedInstanceState);

        mapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(MapboxMap map) {
                mapboxMap = map;
                mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(37.7749, 122.4194), 0));

                //Add a clustered source with some layers
                addClusteredGeoJsonSource();
            }
        });
    }

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

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

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

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

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

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

    private void addClusteredGeoJsonSource() {
        //Add a clustered source
        try {
            mapboxMap.addSource(
                    new GeoJsonSource("earthquakes", new URL("https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson"))
                            .withCluster(true)
                            .withClusterMaxZoom(14)
                            .withClusterRadius(50)
            );
        } catch (MalformedURLException e) {
            Log.e(TAG, "That's not an url... " + e.getMessage());
        }

        //Add unclustered layer
        int[][] layers = new int[][]{
                new int[]{150, ResourcesCompat.getColor(getResources(), R.color.red_accent, getTheme())},
                new int[]{20, ResourcesCompat.getColor(getResources(), R.color.green_accent, getTheme())},
                new int[]{0, ResourcesCompat.getColor(getResources(), R.color.blue_accent, getTheme())}
        };

        SymbolLayer unclustered = new SymbolLayer("unclustered-points", "earthquakes");
        unclustered.setProperties(iconImage("marker-15"));
        mapboxMap.addLayer(unclustered);

        for (int i = 0; i < layers.length; i++) {
            //Add some nice circles
            CircleLayer circles = new CircleLayer("cluster-" + i, "earthquakes");
            circles.setProperties(
                    circleColor(layers[i][1]),
                    circleRadius(18f)
            );
            circles.setFilter(
                    i == 0 ?
                            gte("point_count", layers[i][0]) :
                            all(gte("point_count", layers[i][0]), lt("point_count", layers[i - 1][0]))
            );
            mapboxMap.addLayer(circles);
        }

        //Add the count labels
        SymbolLayer count = new SymbolLayer("count", "earthquakes");
        count.setProperties(
                textField("{point_count}"),
                textSize(12f),
                textColor(Color.WHITE)
        );
        mapboxMap.addLayer(count);


        //Zoom out to start
        mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(1));
    }

    private void setupActionBar() {
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

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