package com.example.strongpassword;

import androidx.appcompat.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 {

    Button submitBtn;
    EditText passwordLengthField;
    TextView generatedPassword;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        submitBtn = findViewById(R.id.SubmitBtn);
        passwordLengthField = findViewById(R.id.PasswordLengthField);
        generatedPassword = findViewById(R.id.ResultView);

        submitBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String randomGeneratedPassword = null;

                boolean isTrue = true;
                while(isTrue) {
                    String pwLengthString = passwordLengthField.getText().toString().trim();
                    int pwLengthInt = Integer.parseInt(pwLengthString);

                    if (pwLengthInt > 8 && pwLengthInt < 16) {
                        randomGeneratedPassword = randomPassword(pwLengthInt);
                        isTrue = false;
                    }
                    else {
                        Toast.makeText(MainActivity.this, "Error in password length", Toast.LENGTH_LONG).show();
                    }
                }
                generatedPassword.setText(randomGeneratedPassword);
            }
        });
    }
    public static String randomPassword(int passwordLength){

        String numbers = "1234567890";
        String smallCharacter = "abcdefghijklmnopqrstuwxyz";
        String capCharacter  = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        String symbols = "!@#$%^&*()_-+=[]{}:;'\"|/?.><,";

        String wholeArr = numbers + smallCharacter + capCharacter+ symbols;
        char wholeArray[] = wholeArr.toCharArray();//converting combined string to char array

        char[] randPasswordStore = new char[passwordLength];

        for(int a =0; a<passwordLength; a++){
            randPasswordStore[a]= wholeArr.charAt((int)(Math.random() * wholeArray.length));
        }
        String result = String.valueOf(randPasswordStore);
        return result;
    }

}