package jalviewfx.customcomponent;

import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class AlertDialog extends Stage{
	 private final int WIDTH_DEFAULT = 300;

	    public static final int ICON_INFO = 0;
	    public static final int ICON_ERROR = 1;    

	    @SuppressWarnings({ "unchecked", "rawtypes" })
		public AlertDialog(Stage owner, String msg, int type) {
	        setResizable(false);
	        initModality(Modality.APPLICATION_MODAL);
	        initStyle(StageStyle.TRANSPARENT);

	        Label label = new Label(msg);
	        label.setWrapText(true);
	        label.setGraphicTextGap(20);
	        label.setGraphic(new ImageView(getImage(type)));

	        Button button = new Button("OK");
	        button.setOnAction(new EventHandler(){
	            @Override
	            public void handle(Event arg0) {
	                AlertDialog.this.close();
	            }
	        });

	        BorderPane borderPane = new BorderPane();
	        borderPane.getStylesheets().add(getClass().getResource("alert.css").toExternalForm());        
	        borderPane.setTop(label);

	        HBox hbox2 = new HBox();
	        hbox2.setAlignment(Pos.CENTER);
	        hbox2.getChildren().add(button);
	        borderPane.setBottom(hbox2);

	        // calculate width of string
	        final Text text = new Text(msg);
	        text.snapshot(null, null);
	        // + 20 because there is padding 10 left and right
	        int width = (int) text.getLayoutBounds().getWidth() + 40;

	        if (width < WIDTH_DEFAULT)
	            width = WIDTH_DEFAULT;

	        int height = 100;

	        final Scene scene = new Scene(borderPane, width, height);
	        scene.setFill(Color.TRANSPARENT);
	        setScene(scene);

	        // make sure this stage is centered on top of its owner
	        setX(owner.getX() + (owner.getWidth() / 2 - width / 2));
	        setY(owner.getY() + (owner.getHeight() / 2 - height / 2));
	    }

	    private Image getImage(int type) {
	        if (type == ICON_ERROR)
	            return new Image(getClass().getResourceAsStream("/images/error.png"));
	        else
	            return new Image(getClass().getResourceAsStream("/images/info.png"));
	    }
}