package com.example.foodhygiene;

import android.Manifest;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.Spinner;
import android.widget.TextView;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity {
    private ListView listView;
    private ArrayList names;
    private ArrayList names1;

    private ArrayAdapter namesAdapter;
    private ArrayAdapter namesAdapter1;

    private String searchParam;
    private LocationManager locationManager;
    private LocationListener locationListener;
    private final int FINE_LOCATION_PERMISSION = 1;

    final String url = "http://api.ratings.food.gov.uk/Establishments/?pageNumber=1&pageSize=10&";

    private String nameExtra = "";
    private String locationExtra = "";
    ProgressBar pb;

    private Location currentLocation;
    private TextView textView;
    ArrayList<String> RegionName;


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        pb = (ProgressBar) findViewById(R.id.progressBarSearch);
        pb.setMax(100);


        names1 = new ArrayList<Region>();
        regionSpinner();
        namesAdapter1 = new ArrayAdapter(this, android.R.layout.simple_selectable_list_item, names1);

        names = new ArrayList<Establishment>();
        namesAdapter = new ArrayAdapter(this, android.R.layout.simple_selectable_list_item, names);
        listView = findViewById(R.id.display_list);
        listView.setAdapter(namesAdapter);
        Spinner spinner = findViewById(R.id.regionSpinner1);
        spinner.setAdapter(namesAdapter1);


        final AdapterView.OnItemClickListener itemClickListener = new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Establishment clickedItem = (Establishment) namesAdapter.getItem(position);
                Intent intent = new Intent(MainActivity.this, RestaurantDetailsActivity.class);
                intent.putExtra("apiID", clickedItem.getApiID());
                startActivity(intent);
            }
        };

        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        locationListener = new LocationListener() {

            @Override
            public void onLocationChanged(Location location) {
                currentLocation = location;
            }

            @Override
            public void onStatusChanged(String provider, int status, Bundle extras) {

            }

            @Override
            public void onProviderEnabled(String provider) {


            }

            @Override
            public void onProviderDisabled(String provider) {

            }


        };
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_DENIED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
                new AlertDialog.Builder(this)
                        .setMessage("The application is about to request access to your location.")
                        .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                requestLocPerms();
                            }
                        })
                        .create()
                        .show();
            } else {
                requestLocPerms();
            }
        } else {
            attachLocManager();
        }


        listView.setOnItemClickListener(itemClickListener);
        currentLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        locationListener.onLocationChanged(currentLocation);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case FINE_LOCATION_PERMISSION: {
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    attachLocManager();
                } else {
                }
                return;
            }
        }
    }

    public void attachLocManager() {
        try {
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0, locationListener);
        } catch (SecurityException err) {
        }
    }

    public void requestLocPerms() {
        ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, FINE_LOCATION_PERMISSION);
    }

    public void queryAPI(View view) {
        RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());


        textView = findViewById(R.id.search_text);
        searchParam = textView.getText().toString().toLowerCase().trim();
        if (searchParam == null) {
            //print a dialogue
        }

        String urlExtra = url;

        String filterChoice = checkSpinner();
        nameExtra = filterChoice + searchParam;
        urlExtra += nameExtra;
        urlExtra += locationExtra;


        // Request a string response from the provided URL.
        JsonObjectRequest objectRequest = new JsonObjectRequest(Request.Method.GET, urlExtra, null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        try {
                           pb.setVisibility(View.VISIBLE);
                            pb.setProgress(0);
                            JSONArray data = response.getJSONArray("establishments");
                            if (data != null) {
                                populateList(data);
                                System.out.println(response.toString());

                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        } finally {
                           // pb.setProgress(100);
                        }

                    }


                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                textView.setText("That didn't work!");
                System.err.println(error.toString());
            }

        }) {
            @Override
            public Map<String, String> getHeaders() {
                Map<String, String> params = new HashMap<String, String>();
                params.put("x-api-version", "2");
                params.put("Accept-Language", "cy-GB");
                params.put("Content-Type", "application/json");

                return params;
            }

        };

// Add the request to the RequestQueue.
        requestQueue.add(objectRequest);
    }


    public void populateList(JSONArray data) throws JSONException {


        for (int i = 0; i < data.length(); i++) {
            JSONObject jo = data.getJSONObject(i);
            names.add(new Establishment(jo.getInt("FHRSID"), jo.getString("BusinessName"), jo.getString("FHRSID"), jo.getString("AddressLine1"), jo.getString("RatingValue")));
        }
        namesAdapter.notifyDataSetChanged();

    }

    public void populateList2(JSONArray data) throws JSONException {


        for (int i = 0; i < data.length(); i++) {
            JSONObject jo = data.getJSONObject(i);
            Region region = new Region(jo.getInt("id"), jo.getString("name"), jo.getString("nameKey"), jo.getString("code"));
            names1.add(region);
        }
        namesAdapter1.notifyDataSetChanged();

    }


    public void useLocation(View view) {
        CheckBox checkBox = findViewById(R.id.location_checkbox);
        if (checkBox.isChecked()) {
            String longitude = String.format("%.2f", currentLocation.getLongitude());
            String latitude = String.format("%.2f", currentLocation.getLatitude());

            locationExtra = "&longitude=" + longitude + "&latitude=" + latitude + "&maxDistanceLimit=2";

        } else {
            locationExtra = "";
        }
    }

    public String checkSpinner() {
        String choice = "name=";
        Spinner spinner = findViewById(R.id.filterSpinner);
        switch (spinner.getSelectedItem().toString()) {
            case "name":
                choice = "name=";
                break;
            case "type of business":
                choice = "BusinessType=";
                break;
            case "rating":
                choice = "ratingKey=";
                break;
            case "region and local authority":
                choice = "LocalAuthorityName=";
                break;


        }
        return choice;
    }

    public void regionSpinner() {
        RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());

        String urlExtra1 = "http://api.ratings.food.gov.uk/Regions/?";


        // Request a string response from the provided URL.
        JsonObjectRequest objectRequest = new JsonObjectRequest(Request.Method.GET, urlExtra1, null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        try {
                            // pb.setVisibility(View.VISIBLE);
                            //  pb.setProgress(0);
                            JSONArray data = response.getJSONArray("regions");
                            if (data != null) {
                                populateList2(data);
                                System.out.println(response.toString());

                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        } finally {
                            // pb.setProgress(100);
                        }

                    }


                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
//                textView.setText("That didn't work!");
                System.err.println(error.toString());
            }


        }){
            @Override
            public Map<String, String> getHeaders() {
                Map<String, String> params = new HashMap<String, String>();
                params.put("x-api-version", "2");
                params.put("Accept-Language", "cy-GB");
                params.put("Content-Type", "application/json");

                return params;
            }

        };

        requestQueue.add(objectRequest);

        }
}