package com.melonfeed.melonfeed;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.android.material.textfield.TextInputEditText;
import com.google.firebase.FirebaseException;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.PhoneAuthCredential;
import com.google.firebase.auth.PhoneAuthOptions;
import com.google.firebase.auth.PhoneAuthProvider;

import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.TimeUnit;

public class otpVerification extends AppCompatActivity {
    Button confirm;
    String phoneNumber, verificationCode;
    long timeoutSeconds = 60L;
    PhoneAuthProvider.ForceResendingToken resendingToken;
    TextView resend;
    FirebaseAuth mAuth = FirebaseAuth.getInstance();
    TextInputEditText otp;
    String verificationID;

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

        confirm = findViewById(R.id.confirmBTN);
        otp = findViewById(R.id.editTextOTP);
        resend = findViewById(R.id.resendOTP);
        phoneNumber = getIntent().getStringExtra("phone");
        mAuth.getFirebaseAuthSettings().setAppVerificationDisabledForTesting(true);
        sendOtp(phoneNumber, false);

        confirm.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String enteredOtp = otp.getText().toString();
                PhoneAuthCredential credential = PhoneAuthProvider.getCredential(verificationCode, enteredOtp);
                signIn(credential);
            }
        });

        resend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sendOtp(phoneNumber, true);
            }
        });
    }

    void sendOtp(String phoneNumber, boolean isResend) {
        startResendTimer();
        PhoneAuthOptions.Builder builder =
                PhoneAuthOptions.newBuilder(mAuth)
                        .setPhoneNumber(phoneNumber)
                        .setTimeout(timeoutSeconds, TimeUnit.SECONDS)
                        .setActivity(this)
                        .setCallbacks(new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
                            @Override
                            public void onVerificationCompleted(@NonNull PhoneAuthCredential phoneAuthCredential) {
                                signIn(phoneAuthCredential);
                            }

                            @Override
                            public void onVerificationFailed(@NonNull FirebaseException e) {
                                Toast.makeText(otpVerification.this, "OTP verification failed", Toast.LENGTH_SHORT).show();
                            }

                            @Override
                            public void onCodeSent(@NonNull String s, @NonNull PhoneAuthProvider.ForceResendingToken forceResendingToken) {
                                super.onCodeSent(s, forceResendingToken);
                                verificationCode = s;
                                resendingToken = forceResendingToken;
                                Toast.makeText(otpVerification.this, "OTP sent successfully", Toast.LENGTH_SHORT).show();

                            }
                        });
        if(isResend){
            PhoneAuthProvider.verifyPhoneNumber(builder.setForceResendingToken(resendingToken).build());
        }else{
            PhoneAuthProvider.verifyPhoneNumber(builder.build());
        }
    }

    void signIn(PhoneAuthCredential phoneAuthCredential){
        //login and go to next activity
        mAuth.signInWithCredential(phoneAuthCredential).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if(task.isSuccessful()){
                    Intent intent = new Intent(otpVerification.this,Settings.class);
                    intent.putExtra("phone", phoneNumber);
                    startActivity(intent);
                }else{
                    Toast.makeText(otpVerification.this, "OTP verification failed", Toast.LENGTH_SHORT).show();
                }
            }
        });


    }

    void startResendTimer() {
        resend.setEnabled(false);
        Timer timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                timeoutSeconds--;
                resend.setText("Resend OTP in " + timeoutSeconds + " seconds");
                if (timeoutSeconds <= 0) {
                    timeoutSeconds = 60L;
                    timer.cancel();
                    runOnUiThread(() -> {
                        resend.setEnabled(true);
                    });
                }
            }
        }, 0, 1000);
    }
}