package com.example.mahers.railnaksha;

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

import static android.text.TextUtils.isEmpty;

public class MainActivity extends AppCompatActivity {
    Button signin,Signup;
    EditText etemailid,password;
    private ProgressBar mProgressBar;
    final String TAG ="MainActivity";

    private FirebaseAuth.AuthStateListener mAuthListener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_main );
        signin=(Button)findViewById( R.id.signin );
        Signup=(Button)findViewById( R.id.Signup );
        etemailid=(EditText)findViewById( R.id.etemailid );
        password=(EditText)findViewById( R.id.password );
        mProgressBar=(ProgressBar) findViewById( R.id.progressBar );

        initProgressBar();
        setupFirebaseAuth();


        signin.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                 if (!isEmpty( etemailid.getText().toString() )
                        && !isEmpty( password.getText().toString() )) {
                    Log.d( TAG, "onClick: attempting to authenticate." );

                    showProgressBar();

                    FirebaseAuth.getInstance().signInWithEmailAndPassword( etemailid.getText().toString(),
                            password.getText().toString() )
                            .addOnCompleteListener( new OnCompleteListener<AuthResult>() {
                                @Override
                                public void onComplete(@NonNull Task<AuthResult> task) {

                                    hideProgressBar();

                                }
                            } ).addOnFailureListener( new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            Toast.makeText( MainActivity.this, "Authentication Failed", Toast.LENGTH_SHORT ).show();
                            hideProgressBar();
                        }
                    } );
                } else {
                    Toast.makeText( MainActivity.this, "You didn't fill in all the fields.", Toast.LENGTH_SHORT ).show();
                }


            }
        } );
        Signup.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i= new Intent( MainActivity.this,Register.class );
                startActivity( i );

            }
        } );
    }
    private void showProgressBar(){
        mProgressBar.setVisibility(View.VISIBLE);

    }

    private void hideProgressBar(){
        if(mProgressBar.getVisibility() == View.VISIBLE){
            mProgressBar.setVisibility(View.INVISIBLE);
        }
    }




    private void initProgressBar(){
        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
        mProgressBar.setVisibility(View.INVISIBLE);
    }


    private void hideSoftKeyboard(){
        this.getWindow().setSoftInputMode( WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
    }
    public void setupFirebaseAuth(){
        Log.d(TAG, "setupFirebaseAuth: started");

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser user = firebaseAuth.getCurrentUser();
                if (user != null) {


                    //check if email is verified
                     if(user!=null){
                        Log.d(TAG, "onAuthStateChanged: signed_in: " + user.getUid());
                        Toast.makeText(MainActivity.this, "Authenticated with: " + user.getEmail(), Toast.LENGTH_SHORT).show();

                        Intent intent = new Intent(MainActivity.this,MapsActivity.class);
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                        startActivity(intent);
                        finish();

                    }else{
                        Toast.makeText(MainActivity.this, "Email is not Verified\nCheck your Inbox", Toast.LENGTH_SHORT).show();
                        FirebaseAuth.getInstance().signOut();
                    }

                } else {
                    // User is signed out
                    Log.d(TAG, "onAuthStateChanged: signed_out");
                }
                // ...
            }
        };
    }
    @Override
    public void onStart() {
        super.onStart();
        FirebaseAuth.getInstance().addAuthStateListener(mAuthListener);
    }

    @Override
    public void onStop() {
        super.onStop();
        if (mAuthListener != null) {
            FirebaseAuth.getInstance().removeAuthStateListener(mAuthListener);
        }
    }
}