import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.ActionMenuView;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

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

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class JSONActivity extends AppCompatActivity {
    private static final String TAG ="JSONExample";
    private List<Person> persons;
    private RecyclerView mRecyclerView;
    private RVAdapter adapter;
    private ProgressBar progressBar;
    private String urlString =
            "http://mobiledev.ronaldramos.info/getallcontacts.php";

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

        mRecyclerView = (RecyclerView) findViewById(R.id.rv);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        progressBar = (ProgressBar) findViewById(R.id.progressBar);
        progressBar.setVisibility(View.VISIBLE);

       new GetData().execute(urlString);
    }

    public void goToAdd(View view){
        Intent intent = new Intent(getApplicationContext(),
                AddActivity.class);
        startActivity(intent);
    }

    //asynctask
    public class GetData extends AsyncTask<String, Void, Integer> {

        @Override
        protected void onPreExecute(){
            setProgressBarIndeterminateVisibility(true);
        }
        @Override
        protected void onPostExecute(Integer result){
            progressBar.setVisibility(View.GONE);
            if(result == 1) {
                adapter = new RVAdapter(getApplicationContext(), persons);
                mRecyclerView.setAdapter(adapter);
            }else{
                Toast.makeText(getApplicationContext(), "Failed to Fetch data!",
                        Toast.LENGTH_LONG).show();
            }

        }




        @Override
        protected Integer doInBackground(String... params){
            Integer result = 0;
            HttpURLConnection urlConnection;
            try {
                URL url = new URL(params[0]);
                urlConnection = (HttpURLConnection)url.openConnection();
                int statusCode = urlConnection.getResponseCode();

                //200 represents HTTP ok
                if (statusCode == 200) {
                    BufferedReader r = new BufferedReader(
                            new InputStreamReader(urlConnection.getInputStream()));
                    StringBuilder response = new StringBuilder();
                    String line;
                    while((line = r.readLine()) != null){
                        response.append(line);
                    }
                    parseResult(response.toString());
                    result =1; //success
                } else {
                    result = 0; //failed to fetch data
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }

    }//end of GetData asynctask class

    private void parseResult(String result){
        try{
            JSONArray personJSON = new JSONArray(result);
            persons = new ArrayList<>();

            for(int i =0; i<personJSON.length(); i++){
                JSONObject post = personJSON.optJSONObject(i);
                Person person = new Person(post.getString("name"),
                        post.getString("phone"), R.drawable.cat);
                persons.add(person);
            }

        }catch(Exception e){
            e.printStackTrace();
        }
    }//end of parseResults


}//end of Activity class