package com.example.dominik.logintest;

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.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.firestore.DocumentReference;
import com.google.firebase.firestore.DocumentSnapshot;
import com.google.firebase.firestore.FirebaseFirestore;

import java.util.HashMap;

public class MainActivity extends AppCompatActivity {

    FirebaseFirestore db;
    EditText username;
    EditText password;
    Button add;

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

        db= FirebaseFirestore.getInstance();
        username = findViewById(R.id.username);
        password = findViewById(R.id.password);
        add = findViewById(R.id.button);

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

    }

    public void addNewUser(){

        //Add new User to User book

        HashMap<String,Object> newUser = new HashMap<String,Object>();
        newUser.put("username", username.getText().toString().toLowerCase());
        newUser.put("password", password.getText().toString());

             db.collection("UserData").document(username.getText().toString().toLowerCase())
                    .set(newUser)
                    .addOnSuccessListener(new OnSuccessListener<Void>() {
                        @Override
                        public void onSuccess(Void aVoid) {
                            Toast.makeText(MainActivity.this, "Added new user", Toast.LENGTH_SHORT).show();
                        }
                    })

                    .addOnFailureListener(new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            Log.d("ERROR", e.getMessage());
                        }
                    });


    }

    public void checkForUsername() {

        DocumentReference docRef = db.collection("UserData").document(username.getText().toString().toLowerCase());
        docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                if (task.isSuccessful()) {
                    DocumentSnapshot document = task.getResult();
                    if (document.exists()) {
                        Toast.makeText(MainActivity.this, "User exists already!", Toast.LENGTH_SHORT).show();
                    } else {
                        addNewUser();
                    }
                } else {
                    Toast.makeText(MainActivity.this, "Error!", Toast.LENGTH_SHORT).show();
                }
            }
        });

    }
}