Alvaro2112/Money_run

package sdp.moneyrun.ui.authentication;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

import java.util.Objects;

import sdp.moneyrun.R;
import sdp.moneyrun.database.DatabaseProxy;

public class SignUpActivity extends AppCompatActivity {
    private final String TAG = SignUpActivity.class.getSimpleName();
    private FirebaseAuth mAuth;
    private Button submitButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sign_up_interface);
        // Initialize Firebase Auth
        Objects.requireNonNull(getSupportActionBar()).hide();
        mAuth = FirebaseAuth.getInstance();

        submitButton = findViewById(R.id.signUpSubmitButton);
        submitButton.setOnClickListener(clicked -> {
            EditText emailView = findViewById(R.id.signUpEmailText);
            EditText passwordView = findViewById(R.id.signUpPassword);
            String email = emailView.getText().toString().trim();
            String password = passwordView.getText().toString().trim();
            submitButton.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), R.color.colorPrimary));
            if (checkInput(emailView, passwordView)) {
                submitSignUp(email, password);
            }
        });
        DatabaseProxy.addOfflineListener(this, TAG);
    }


    @Override
    public void onStart() {
        super.onStart();
        //Check if user is signed in (non-null) and update UI accordingly
        FirebaseUser currentUser = mAuth.getCurrentUser();
        if (currentUser != null) {
            updateUI(currentUser);
        }
    }

    /**
     * This is needed for testing
     * Also, since it's one of the first activity created, it's reasonable to assume that when it's
     * destroyed the user should be signed out
     */
    @Override
    public void onDestroy() {
        super.onDestroy();
        mAuth.signOut();
        DatabaseProxy.removeOfflineListener();
    }

    private void submitSignUp(@NonNull String email, @NonNull String password) {
        mAuth.createUserWithEmailAndPassword(email, password)
                .addOnCompleteListener(SignUpActivity.this, task -> {
                    if (task.isSuccessful()) {
                        //Sign-In success
                        Log.d(TAG, "createUserWithEmail:success");
                        FirebaseUser user = mAuth.getCurrentUser();
                        updateUI(user);
                    } else {
                        Log.w(TAG, "CreateUserWithEmail:failure", task.getException());
                        String errorMessage = task.getException().getMessage() == null
                                ? "Reason unknown"
                                : task.getException().getMessage();
                        Toast.makeText(
                                SignUpActivity.this,
                                "Authentication failed : " + errorMessage,
                                Toast.LENGTH_SHORT).show();
                        submitButton.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), R.color.design_default_color_background));
                    }
                });
    }

    /**
     * @param user
     */
    private void updateUI(@Nullable FirebaseUser user) {
        if (user != null) {
            Intent intent = new Intent(this, RegisterUserActivity.class);
            intent.putExtra("userId", user.getUid());
            startActivity(intent);
            finish();
        }
    }

    /**
     * Ensures password is at least 7 characters long
     *
     * @param password
     * @return
     */
    private boolean isPasswordValid(@NonNull CharSequence password) {
        return password.length() > 6;
    }

    /**
     * Ensure email has basic email format
     *
     * @param email
     * @return
     */
    private boolean isEmailValid(@NonNull CharSequence email) {
        return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
    }

    /**
     * Check that text fields are valid i.e non empty and correct format
     *
     * @param emailView
     * @param passwordView
     * @return
     */
    private boolean checkInput(@NonNull EditText emailView, @NonNull EditText passwordView) {
        boolean retValue = true;
        String email = emailView.getText().toString().trim();
        String password = passwordView.getText().toString().trim();
        if (email.isEmpty()) {
            emailView.setError("Email is required");
            emailView.requestFocus();
            retValue = false;
        } else if (password.isEmpty()) {
            passwordView.setError("Password is required");
            passwordView.requestFocus();
            retValue = false;
        } else if (!isEmailValid(email)) {
            emailView.setError("Please enter a valid email address");
            emailView.requestFocus();
            retValue = false;
        } else if (!isPasswordValid(password)) {
            passwordView.setError("The password should be at least seven characters");
            passwordView.requestFocus();
            retValue = false;
        }
        return retValue;
    }

    @Override
    public void onBackPressed() {
    }
}