package com.example.root.profile;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.RatingBar;
import android.widget.TextView;
import android.widget.Toast;

import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;

import static android.R.attr.key;
import static android.R.attr.value;
import static com.example.root.profile.R.id.view;

public class MainActivity extends AppCompatActivity {

    private TextView txtRatingValue;
    private RatingBar ratingBar;
    private static final String TAG = "Rating";
    private Button btnSubmit;
    int i = 0;
    float total = 0;
    float average;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        FirebaseDatabase database = FirebaseDatabase.getInstance();
        final DatabaseReference rateRes = database.getReference("rating").child("Ahmed");
//        final Query name = rateRes.equalTo("Ahmed");
        // Read from the database

        rateRes.addValueEventListener(new ValueEventListener() {
            // On Data Change
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                // This method is called once with the initial value and again
                // whenever data at this location is updated.
//                if(name != null){
//                    //Object rate = dataSnapshot.getValue();
//                    Object rate = 3.5f;
//                    ratingBar.setRating((Float) rate);
//                }

                addListenerOnRatingBar();
                Float value = dataSnapshot.getValue(Float.class);
                if(value == null){
                    value = Float.valueOf(0);
                }
                txtRatingValue.setText(String.valueOf(value));
                final Float finalValue = value;
                findViewById(R.id.ratebtn).setOnClickListener(new View.OnClickListener(){
                    @Override
                    public void onClick(View view) {

                        addListenerOnButton();
                        total += finalValue;
                        average = total/++i;
                        rateRes.setValue(String.valueOf(average));
                    }
                });


                Log.d(TAG, "Value is: " + value);

            }

            @Override
            public void onCancelled(DatabaseError error) {
                // Failed to read value
                Log.w(TAG, "Failed to read value.", error.toException());
            }
        });
    }


    public void addListenerOnRatingBar() {

        ratingBar = (RatingBar) findViewById(R.id.ratingBar);
        txtRatingValue = (TextView) findViewById(R.id.txtRatingValue);

        //if rating value is changed,
        //display the current rating value in the result (textview) automatically
        ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
            public void onRatingChanged(RatingBar ratingBar, float rating,
                                        boolean fromUser) {

                txtRatingValue.setText(String.valueOf(rating));

            }
        });
    }
    public void addListenerOnButton() {

        ratingBar = (RatingBar) findViewById(R.id.ratingBar);
        btnSubmit = (Button) findViewById(R.id.ratebtn);

        //if click on me, then display the current rating value.
        btnSubmit.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                Toast.makeText(MainActivity.this,
                        String.valueOf(ratingBar.getRating()),
                        Toast.LENGTH_SHORT).show();

            }

        });

    }
}