package envoy.client.ui.chatscene;

import java.util.function.Consumer;

import javafx.event.*;
import javafx.scene.control.*;
import javafx.scene.input.Clipboard;

/**
 * Displays a context menu that offers an additional option when one of
 * its menu items has been clicked.
 * <p>
 * Current options are:
 * <ul>
 * <li>undo</li>
 * <li>redo</li>
 * <li>cut</li>
 * <li>copy</li>
 * <li>paste</li>
 * <li>delete</li>
 * <li>clear</li>
 * <li>Select all</li>
 * </ul>
 *
 * @author Leon Hofmeister
 * @since Envoy Client v0.2-beta
 * @apiNote please refrain from using
 *          {@link ContextMenu#setOnShowing(EventHandler)} as this is already
 *          used by this component
 */
public class TextInputContextMenu extends ContextMenu {

	private final MenuItem	undoMI		= new MenuItem("Undo");
	private final MenuItem	redoMI		= new MenuItem("Redo");
	private final MenuItem	cutMI		= new MenuItem("Cut");
	private final MenuItem	copyMI		= new MenuItem("Copy");
	private final MenuItem	pasteMI		= new MenuItem("Paste");
	private final MenuItem	deleteMI	= new MenuItem("Delete selection");
	private final MenuItem	clearMI		= new MenuItem("Clear");
	private final MenuItem	selectAllMI	= new MenuItem("Select all");

	/**
	 * Creates a new {@code TextInputContextMenu} with an optional action when
	 * this menu was clicked. Currently shows:
	 * <ul>
	 * <li>undo</li>
	 * <li>redo</li>
	 * <li>cut</li>
	 * <li>copy</li>
	 * <li>paste</li>
	 * <li>delete</li>
	 * <li>clear</li>
	 * <li>Select all</li>
	 * </ul>
	 *
	 * @param control         the text input component to display this
	 *                        {@code ContextMenu}
	 * @param menuItemClicked the second action to perform when a menu item of this
	 *                        context menu has been clicked
	 * @since Envoy Client v0.2-beta
	 * @apiNote please refrain from using
	 *          {@link ContextMenu#setOnShowing(EventHandler)} as this is already
	 *          used by this component
	 */
	public TextInputContextMenu(TextInputControl control, Consumer<ActionEvent> menuItemClicked) {

		// Define the actions when clicked
		undoMI.setOnAction(addAction(e -> control.undo(), menuItemClicked));
		redoMI.setOnAction(addAction(e -> control.redo(), menuItemClicked));
		cutMI.setOnAction(addAction(e -> control.cut(), menuItemClicked));
		copyMI.setOnAction(addAction(e -> control.copy(), menuItemClicked));
		pasteMI.setOnAction(addAction(e -> control.paste(), menuItemClicked));
		deleteMI.setOnAction(addAction(e -> control.replaceSelection(""), menuItemClicked));
		clearMI.setOnAction(addAction(e -> control.setText(""), menuItemClicked));
		selectAllMI.setOnAction(addAction(e -> control.selectAll(), menuItemClicked));

		// Define the times it will be disabled
		undoMI.disableProperty().bind(control.undoableProperty().not());
		redoMI.disableProperty().bind(control.redoableProperty().not());
		cutMI.disableProperty().bind(control.selectedTextProperty().isEmpty());
		copyMI.disableProperty().bind(control.selectedTextProperty().isEmpty());
		deleteMI.disableProperty().bind(control.selectedTextProperty().isEmpty());
		clearMI.disableProperty().bind(control.textProperty().isEmpty());
		selectAllMI.disableProperty().bind(control.textProperty().isEmpty());
		setOnShowing(e -> pasteMI.setDisable(!Clipboard.getSystemClipboard().hasString()));

		selectAllMI.getProperties().put("refreshMenu", Boolean.TRUE);

		// Add all items to the ContextMenu
		getItems().add(undoMI);
		getItems().add(redoMI);
		getItems().add(new SeparatorMenuItem());
		getItems().add(cutMI);
		getItems().add(copyMI);
		getItems().add(pasteMI);
		getItems().add(new SeparatorMenuItem());
		getItems().add(deleteMI);
		getItems().add(clearMI);
		getItems().add(new SeparatorMenuItem());
		getItems().add(selectAllMI);
	}

	private EventHandler<ActionEvent> addAction(Consumer<ActionEvent> originalAction, Consumer<ActionEvent> additionalAction) {
		return e -> { originalAction.accept(e); additionalAction.accept(e); };
	}
}