package com.example.nofar.myapplication; //Targil 2 misevaha ribohit

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



public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    EditText etA;
    EditText etB;
    EditText etC;

    Button btnFindRoots;
    TextView tvMessage;
    TextView tvX1;
    TextView tvX2;


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

        etA= (EditText) findViewById(R.id.editTextA);
        etB= (EditText) findViewById(R.id.editTextB);
        etC= (EditText) findViewById(R.id.editTextC);

        tvMessage= (TextView) findViewById(R.id.textViewMessage);
        tvX1= (TextView) findViewById(R.id.textViewX1);
        tvX2= (TextView) findViewById(R.id.textViewX2);
        btnFindRoots= (Button) findViewById(R.id.buttonFindRoots);
        btnFindRoots.setOnClickListener(this);

    }

    @Override
    public void onClick(View view) {

        try {
            double a=Double.parseDouble(etA.getText().toString());
            double b=Double.parseDouble(etB.getText().toString());
            double c=Double.parseDouble(etC.getText().toString());

            double d=Math.pow(b,2)-4*a*c;
            if(d<0){
                tvMessage.setText("No roots");
                tvX1.setText("");
                tvX2.setText("");
            }else{
                if(d==0){
                    tvMessage.setText("One Root");
                    double x =(double) -b/2*a;
                    tvX1.setText(x+"");
                    tvX2.setText(x+"");
                }

                if(d>0){
                    tvMessage.setText("Two Root");
                    double x1 =(double) (-b+Math.sqrt(d))/2*a;
                    double x2 =(double) (-b-Math.sqrt(d))/2*a;
                    tvX1.setText(x1+"");
                    tvX2.setText(x2+"");

                }
            }

        } catch (NumberFormatException e) {
            //Error message
            Toast.makeText(this,"Error input values!. Please try again.",Toast.LENGTH_LONG).show();
            tvX1.setText("");
            tvX2.setText("");
            tvMessage.setText("");

        }

    }
}