import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import android.content.Intent;
import android.os.Bundle;
import android.app.Activity;
import android.support.annotation.NonNull;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
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.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class GetStartedActivity extends Activity {

    private EditText mEmailEditText;
    private EditText mPasswordEditText;
    private Button mLoginButton;
    private String mEmail;
    private String mPassword;
    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener mAuthListener;
    private TextView mCreateTextView;

    /*LIFE CYCLE methods */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_get_started);

        initializeViews();

        mAuth = FirebaseAuth.getInstance();
        setFirebaseAuthListener();

        setLoginButtonListener();
        setCreateTextViewListener();
    }

    @Override
    public void onStart() {
        super.onStart();
        mAuth.addAuthStateListener(mAuthListener);
    }

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

    //initialize all the views
    public void initializeViews(){

        mEmailEditText = (EditText)findViewById(R.id.get_started_email);
        mPasswordEditText = (EditText)findViewById(R.id.get_started_password);
        mLoginButton = (Button)findViewById(R.id.get_started_login);
        mCreateTextView = (TextView)findViewById(R.id.get_started_create);
    }

    //get text from edit text views
    public User getTextFromViews(){

        mEmail = mEmailEditText.getText().toString();
        mPassword = mPasswordEditText.getText().toString();

        User user = new User();

        user.setEmail(mEmail);
        user.setPassword(mPassword);

        return user;
    }

    //listener for login button
    public void setLoginButtonListener(){

        mLoginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                User user = getTextFromViews();

                //check for active network before attempting to authenticate user
                if(NetworkUtil.activeNetworkCheck(getApplication()) == true){

                    loginUserWithFirebase(user, mAuth);
                    Log.i("Network Status: ", "Active");
                }
                else{

                    Toast.makeText(getApplicationContext(), "No Active Network, This app requires a network connection"
                            , Toast.LENGTH_SHORT).show();

                    Log.i("Network Status: ", "Inactive");
                }
            }
        });
    }

    //firebase authentication listener
    public void setFirebaseAuthListener(){

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {

            }
        };
    }

    //login an existing user using firebase authentication
    public void loginUserWithFirebase(User user, FirebaseAuth auth){

        auth.signInWithEmailAndPassword(user.getEmail(), user.getPassword())
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {

                        if(task.isSuccessful()){

                            Log.i("Authentication", task.isSuccessful() + "");

                            Toast.makeText(getApplicationContext(),
                                    getResources().getString(R.string.authentication_success),
                                    Toast.LENGTH_LONG).show();
                        }

                        if(!task.isSuccessful()){

                            Log.i("Authentication", task.isSuccessful() + "");

                            Toast.makeText(getApplicationContext(),
                                    getResources().getString(R.string.authentication_failed),
                                    Toast.LENGTH_LONG).show();
                        }
                    }
                });
    }

    public void setCreateTextViewListener(){

        mCreateTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


            }
        });
    }
}