package sas.kacper.itemsapp;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import javax.xml.bind.DatatypeConverter;

import javafx.application.Application;

import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.control.PasswordField;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.ButtonType;
import javafx.scene.layout.VBox;
import javafx.scene.layout.HBox;
import javafx.scene.Node;
import javafx.scene.text.Text;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

import javafx.stage.Stage;

import javafx.event.ActionEvent;
import javafx.event.EventHandler;

import javafx.geometry.Pos;

import sas.kacper.itemsapp.LoginAuthenticator;

public class MainWindow extends Application {

    @Override
    public void start(Stage primaryStage) {

        VBox mainPane = new VBox(10);

        Image iLogo = new Image("file:java.png", true);
        ImageView ivLogo = new ImageView();
        ivLogo.setImage(iLogo);

        Text lText = new Text("Nazwa użytkownika");
        Text pText = new Text("Hasło");
        TextField lField = new TextField();
        PasswordField pField = new PasswordField();
        Button bLogin = new Button("Log In!");

        bLogin.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent e) {
                String userLogin="", userHash="";
                userLogin = lField.getText();

                try {
                    MessageDigest crypt = MessageDigest.getInstance("MD5");
                    crypt.update((pField.getText()).getBytes());
                    userHash = (DatatypeConverter.printHexBinary(crypt.digest())).toLowerCase();
                } catch(NoSuchAlgorithmException exc) {
                    exc.printStackTrace();
                }

                Alert aAlert = new Alert(AlertType.INFORMATION);
                ((Stage)aAlert.getDialogPane().getScene().getWindow()).getIcons().add(new Image("file:java.png"));
                aAlert.setContentText("Wszystko ok!");
                aAlert.setTitle("Zalogowany!");

                if(!(LoginAuthenticator.checkLogin(userLogin, userHash))) {
                    aAlert.setAlertType(AlertType.ERROR);
                    aAlert.setContentText("Coś poszło nie tak!");
                    aAlert.setTitle("Błąd");
                }

                aAlert.setHeaderText(null);
                aAlert.showAndWait();

            }
        });

        lField.setMaxWidth(250);
        pField.setMaxWidth(250);
        lField.setAlignment(Pos.CENTER);
        pField.setAlignment(Pos.CENTER);

        mainPane.setAlignment(Pos.CENTER);
        mainPane.setStyle("-fx-background-color: #FFFFFF;");
        mainPane.getChildren().addAll(ivLogo, new Text(), new Text(), lText, lField, pText, pField, new Text(), bLogin);

        Scene mainScene = new Scene(mainPane, 450, 600);

        primaryStage.setTitle("Log In!");
        primaryStage.setResizable(false);
        primaryStage.setScene(mainScene);
        primaryStage.getIcons().add(new Image("file:java.png"));
        primaryStage.show();

    }

    public static void main(String ... args) {
        launch(args);
    }

}