Local.java

package Bean;

import com.google.gson.annotations.Expose;

/**
 * Created by foobar on 8/25/16.
 */
public class Local {
    @Expose
    public String id;
    @Expose
    public String name;
    @Expose
    public String pwd;
    @Expose
    public String email;
    @Expose
    public int age;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

LoginActivity.java

package com.example.foobar.heloeworldauth;

import android.app.ProgressDialog;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;
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.gson.Gson;
import com.google.gson.GsonBuilder;

import API.UserAuthentication;
import Bean.Local;
import Bean.User;
import butterknife.BindView;
import butterknife.ButterKnife;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;


/**
 * A login screen that offers login via email/password.
 */
public class LoginActivity extends AppCompatActivity implements Callback<User> {

    private static final String TAG = "LoginActivity";
    private static final int REQUEST_SIGNUP = 0;

    @BindView(R.id.input_email) EditText _emailText;
    @BindView(R.id.input_password) EditText _passwordText;
    @BindView(R.id.btn_login) Button _loginButton;
    @BindView(R.id.link_signup) TextView _signupLink;

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        ButterKnife.bind(this);

        _loginButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                login();
            }
        });

        _signupLink.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View v){
                Intent intent = new Intent(getApplicationContext(), SignupActivity.class);
                startActivityForResult(intent, REQUEST_SIGNUP);
            }
        });
    }

    public void login(){
        Log.d(TAG, "Login");

        if(!validate()){
            onLoginFailed();
            return;
        }

        _loginButton.setEnabled(false);

        final ProgressDialog progressDialog =
                new ProgressDialog(LoginActivity.this, R.style.AppTheme_Dark_Dialog);

        progressDialog.setIndeterminate(true);
        progressDialog.setMessage("Authenticating...");
        progressDialog.show();

        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();

        Local local = new Local();
        local.setEmail(email);
        local.setPwd(password);

        User user = new User();
        user.setLocal(local);
        // TODO: Implement auth call here

        // TODO: Testing auth call here
        Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd't'HH:mm:ssZ").create();
        Retrofit retrofit = new Retrofit.Builder().baseUrl(UserAuthentication.ENDPOINT)
                .addConverterFactory(GsonConverterFactory.create(gson)).build();

        UserAuthentication userAuthentication = retrofit.create(UserAuthentication.class);

        Call call = userAuthentication.createUser(user);
        call.enqueue(this);


//        new android.os.Handler().postDelayed(
//          new Runnable(){
//              public void run(){
//                  //TODO: on complete call either onLoginSuccess or onLoginFailed
//                  //TODO: just defaulting to onLoginSuccess right now.
//                  onLoginSuccess();
//
//                  progressDialog.dismiss();
//              }
//          }, 3000);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data){
        if(requestCode == REQUEST_SIGNUP){
            if(resultCode == RESULT_OK){
                // TODO: Implement successful signup logic here
                // TODO: by default we just finish the activity and log them in automagically

                this.finish();
            }
        }
    }

    @Override
    public void onBackPressed(){
        // Disable going back to MainActivity
        moveTaskToBack(true);
    }

    public void onLoginSuccess(){
        _loginButton.setEnabled(true);
        finish();
    }

    public void onLoginFailed(){
        Toast.makeText(getBaseContext(), "Login failed", Toast.LENGTH_LONG).show();
        _loginButton.setEnabled(true);
    }

    public boolean validate(){
        boolean valid = true;

        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();

        if(email.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()){
            _emailText.setError("Enter a valid email address");
            valid = false;
        }else{
            _emailText.setError(null);
        }

        if(password.isEmpty() || password.length()<4){
            _passwordText.setError("Password is too short");
            valid = false;
        }else{
            _passwordText.setError(null);
        }

        return valid;
    }

    // TODO: Testing auth here


    @Override
    public void onResponse(Call<User> call, Response<User> response) {
        int STATUS = response.code();
        if(STATUS == 200){
            User user = response.body();
            Local userInfo = user.getLocal();
            Toast.makeText(this, "Got the user: " + userInfo.name , Toast.LENGTH_LONG).show();
            onLoginSuccess();
        }else{
            Toast.makeText(this, "Did not work" + String.valueOf(STATUS), Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onFailure(Call<User> call, Throwable t) {
        Toast.makeText(this, "Nope", Toast.LENGTH_LONG).show();
    }
}

User.java

package Bean;

/**
 * Created by foobar on 8/25/16.
 */
public class User {


    public String _id;
    public Local local;

    public Local getLocal() {
        return local;
    }

    public void setLocal(Local local) {
        this.local = local;
    }

    public String get_id() {
        return _id;
    }

    public void set_id(String _id) {
        this._id = _id;
    }

}

UserAuthentication.java

package API;

import Bean.User;
import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.POST;

/**
 * Created by foobar on 8/25/16.
 */
public interface UserAuthentication {

    String ENDPOINT = "";

    @POST("/signup")
    Call<User> createUser(@Body User user);
}