(function() {


    // Initialize Firebase
    const config = {
        apiKey: "AIzaSyDBRXLeYwNvNisdtcOOhN0VM4SSoCZD80g",
        authDomain: "btc-arena.firebaseapp.com",
        databaseURL: "https://btc-arena.firebaseio.com",
        projectId: "btc-arena",
        storageBucket: "btc-arena.appspot.com",
        messagingSenderId: "453622577544"
      };

      firebase.initializeApp(config);
      var database = firebase.database();
      var db = firebase.firestore();
      var user;


      //Get Elements
      const txtEmail = document.getElementById('emailinput');
      const txtPassword = document.getElementById('passwordinput');
      const btnLogin = document.getElementById('loginbutton');
      const btnSignUp = document.getElementById('signupbutton');
      const btnLogout = document.getElementById('logoutbutton');
      const userStatus = document.getElementById('status');
      const btnOpenClient = document.getElementById('openclientbutton');


      function writeUserData(userId, name, email, imageUrl) {

      }

    //Sign in
     btnLogin.addEventListener('click', e => {
        const email = txtEmail.value;
        const pass=  txtPassword.value;
        const auth = firebase.auth();
        auth.signInWithEmailAndPassword(email, pass).then(function() {

          //User successfully logged-in , do something with him.

        }).catch(function(error) {
          // An error happened.
          console.log(e.message);
        });

      });

        btnSignUp.addEventListener('click', e =>{
        const email = txtEmail.value;
        const pass=  txtPassword.value;
        const auth = firebase.auth();
        const promise = auth.createUserWithEmailAndPassword(email, pass).then(function() {
                    //User successfully signed-up , we logging he im immediatly to set up his account with realtime-database.
                    auth.signInWithEmailAndPassword(email, pass).then(function() {
                                //This is first users log-in to the platform, add some information about him to realtime-databse.
                                db.collection("users").add({
                                  email: user.email,

                              })
                              .then(function(docRef) {
                                  console.log("Document written with ID: ", docRef.id);
                              })
                              .catch(function(error) {
                                  console.error("Error adding document: ", error);
                              });

                               // firebase.database().ref('users/' + user.uid).set({
                               //   email: user.email,
                               //   client: false
                              //  });
                              }).catch(function(error) {
                                // An error happened.
                                console.log(e.message);
                              });

                  }).catch(function(error) {
                    // An error happened.
                    console.log(e.message);
                  });
      });


           //Sign out
           btnLogout.addEventListener('click', e =>{
            firebase.auth().signOut().then(function() {
                // Sign-out successful.
                console.log("user signed out");
              }).catch(function(error) {
                // An error happened.
                console.log(e.message);
              });
          });

      //Open Client Button
      btnOpenClient.addEventListener('click', e =>{
        window.open('./btc-arena webGL/index.html','_blank');
      });






      //Realtime listener
      firebase.auth().onAuthStateChanged(firebaseUser => {
        if(firebaseUser){
            user = firebase.auth().currentUser;
            console.log("logged in as " + user.email);
            userStatus.value = "Logged in.";
        }else{
            console.log("not logged in");
            userStatus.value = "Logged Out.";
        }

      });
//




}());