/*******************************************************************************
 * Copyright (c) 2012 Rushan R. Gilmullin and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0 
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     Rushan R. Gilmullin - initial API and implementation
 *******************************************************************************/ package org.eclipse.osbp.vaadin.optiondialog;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import com.vaadin.data.util.ObjectProperty;
import com.vaadin.shared.ui.MarginInfo;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Component;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;

public class OptionDialog extends Window {

	public enum OptionsAlign {
		LEFT, RIGHT, CENTER
	}

	public static interface OptionListener {
		void optionSelected(OptionDialog optionDialog, int optionId);
	}

	public static interface ComponentProvider extends OptionListener {
		Component getComponent(OptionDialog optionDialog);

		void setMessage(String message);
	}

	private OptionListener optionListener;
	private String msg;
	private boolean modal = true;

	public static final OptionListener CLOSE_LISTENER = new OptionListener() {

		@Override
		public void optionSelected(OptionDialog optionDialog, int optionId) {
			optionDialog.close();
		}
	};

	private ComponentProvider componentProvider = new ComponentProvider() {

		Label label = new Label();

		@Override
		public void setMessage(String message) {
			label.setPropertyDataSource(new ObjectProperty<String>(message,
					String.class));
		}

		@Override
		public Component getComponent(OptionDialog optionDialog) {
			return label;
		}

		@Override
		public void optionSelected(OptionDialog optionDialog, int optionId) {

		}
	};

	private VerticalLayout content;
	private HorizontalLayout buttons = new HorizontalLayout();
	private Map<Button, Integer> button2option = new HashMap<Button, Integer>();
	private Map<Integer, Button> option2button = new HashMap<Integer, Button>();
	private Float optionButtonWidth;
	private Unit optionButtonWidthUnit;

	public OptionDialog() {
		// msgLabel.setWidth("100%");
		// buttons.setWidth("100%");

		buttons.setSpacing(true);
		buttons.setMargin(new MarginInfo(false, true, false, true));
		setOptionsPanelHeight(50, Unit.PIXELS);

		content = new VerticalLayout();
		content.setSizeFull();
		this.setContent(content);
		Component component = componentProvider.getComponent(this);
		content.addComponent(component);
		content.addComponent(buttons);
		content.setComponentAlignment(component, Alignment.TOP_CENTER);
		content.setComponentAlignment(buttons, Alignment.BOTTOM_CENTER);
		content.setExpandRatio(component, 1);

		this.center();
		this.setWidth("500px");
		this.setHeight("100px");
	}

	public String getMessage() {
		return msg;
	}

	public void setMessage(String msg) {
		this.msg = msg;
		componentProvider.setMessage(this.msg);
	}

	public ComponentProvider getComponentProvider() {
		return componentProvider;
	}

	public Component getComponent() {
		return this.componentProvider.getComponent(this);
	}

	public void setComponentProvider(ComponentProvider componentProvider) {
		if (componentProvider == null)
			return;
		Component newComponent = componentProvider.getComponent(this);
		if (newComponent != null) {
			Component oldComponent = this.componentProvider.getComponent(this);
			this.content.removeComponent(oldComponent);
			newComponent.setSizeFull();
			this.content.addComponent(newComponent, 0);
			this.content.setExpandRatio(newComponent, 1);
			this.content.setComponentAlignment(newComponent,
					Alignment.TOP_CENTER);
			this.componentProvider = componentProvider;
		}
	}

	public Alignment getOptionButtonsAlignment() {
		return content.getComponentAlignment(buttons);
	}

	public void setOptionButtonsAlignment(OptionsAlign align) {
		if (align == OptionsAlign.LEFT)
			content.setComponentAlignment(buttons, Alignment.MIDDLE_LEFT);
		else if (align == OptionsAlign.RIGHT)
			content.setComponentAlignment(buttons, Alignment.MIDDLE_RIGHT);
		else if (align == OptionsAlign.CENTER)
			content.setComponentAlignment(buttons, Alignment.MIDDLE_CENTER);
	}

	public void setOptionsPanelHeight(float height, Unit unit) {
		buttons.setHeight(height, unit);
	}

	public void setOptionButtonsWidth(float width, Unit unit) {
		this.optionButtonWidth = width;
		this.optionButtonWidthUnit = unit;
		Iterator<Component> it = buttons.iterator();
		while (it.hasNext()) {
			Component c = it.next();
			if (c instanceof Button) {
				c.setWidth(width, unit);
			}
		}
	}

	public void open(UI parentWindow) {
		parentWindow.addWindow(this);
	}

	public boolean isModal() {
		return this.modal;
	}

	public void setModal(boolean modality) {
		this.modal = modality;
	}

	public OptionListener getOptionListener() {
		return optionListener;
	}

	public void setOptionListener(OptionListener optionListener) {
		this.optionListener = optionListener;
	}

	public void addOption(int optionId, String optionText) {
		Button button = new Button();
		button.setCaption(optionText);
		if (optionButtonWidth != null)
			button.setWidth(optionButtonWidth, optionButtonWidthUnit);
		buttons.addComponent(button);
		buttons.setComponentAlignment(button, Alignment.MIDDLE_CENTER);
		button2option.put(button, optionId);
		option2button.put(optionId, button);
		button.addClickListener(new Button.ClickListener() {

			@Override
			public void buttonClick(ClickEvent event) {
				Integer optionId = button2option.get(event.getButton());

				if (optionListener != null)
					optionListener.optionSelected(OptionDialog.this, optionId);

				getComponentProvider().optionSelected(OptionDialog.this,
						optionId);
			}
		});
	}

	public void setOptionEnabled(int optionId, boolean enabled) {
		Button button = option2button.get(optionId);
		button.setEnabled(enabled);
	}

	public Button getOptionButton(int optionId) {
		return option2button.get(optionId);
	}

	public static void show(UI parentWindow, String caption, String message,
			String[] options, int w, int h, Unit units,
			OptionListener optionListener) {
		OptionDialog optionDialog = new OptionDialog();
		if (w > 0 && h > 0) {
			optionDialog.setWidth(w, units);
			optionDialog.setHeight(h, units);
		}

		optionDialog.setModal(optionDialog.modal);
		optionDialog.setCaption(caption);
		optionDialog.setMessage(message);
		optionDialog.setOptionListener(optionListener);

		for (int i = 0; i < options.length; i++) {
			optionDialog.addOption(i, options[i]);
		}

		parentWindow.addWindow(optionDialog);
	}

	public static void show(UI parentWindow, String caption, String message,
			String[] options, OptionListener optionListener) {
		show(parentWindow, caption, message, options, -1, -1, null,
				optionListener);
	}
}