/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 *
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.team.internal.ccvs.ui.tags;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableContext;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.*;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.internal.ccvs.core.CVSTag;
import org.eclipse.team.internal.ccvs.ui.*;
import org.eclipse.team.internal.ui.PixelConverter;
import org.eclipse.team.internal.ui.SWTUtils;
import org.eclipse.team.internal.ui.dialogs.DialogArea;
import org.eclipse.ui.PlatformUI;

/**
 * An area that displays the Refresh and Configure Tags buttons
 */
public class TagRefreshButtonArea extends DialogArea {
	
	private TagSource tagSource;
	private final Shell shell;
	private Button refreshButton;
	private IRunnableContext context;
	private Label fMessageLabel;
	private final Listener addDateTagListener;

	public TagRefreshButtonArea(Shell shell, TagSource tagSource, Listener addDateTagListener) {
		this.addDateTagListener = addDateTagListener;
		Assert.isNotNull(shell);
		Assert.isNotNull(tagSource);
		this.shell = shell;
		this.tagSource = tagSource;
	}
	
	@Override
	public void createArea(Composite parent) {
		
		final PixelConverter converter= SWTUtils.createDialogPixelConverter(parent);
		
		final Composite buttonComp = new Composite(parent, SWT.NONE);
		buttonComp.setLayoutData(SWTUtils.createHFillGridData());//SWT.DEFAULT, SWT.DEFAULT, SWT.END, SWT.TOP, false, false));
		buttonComp.setLayout(SWTUtils.createGridLayout(4, converter, SWTUtils.MARGINS_NONE));
		
		fMessageLabel= SWTUtils.createLabel(buttonComp, null);
		refreshButton = new Button(buttonComp, SWT.PUSH);
		refreshButton.setText (CVSUIMessages.TagConfigurationDialog_20);
		
		final Button configureTagsButton = new Button(buttonComp, SWT.PUSH);
		configureTagsButton.setText (CVSUIMessages.TagConfigurationDialog_21);
		
		Button addDateTagButton = null;
		int buttonWidth;
		if (addDateTagListener != null) {
			addDateTagButton = new Button(buttonComp, SWT.PUSH);
			addDateTagButton.setText (CVSUIMessages.TagConfigurationDialog_AddDateTag);
			Dialog.applyDialogFont(buttonComp);
			buttonWidth= SWTUtils.calculateControlSize(converter, new Button [] { addDateTagButton, configureTagsButton, refreshButton });
			addDateTagButton.setLayoutData(SWTUtils.createGridData(buttonWidth, SWT.DEFAULT, SWT.END, SWT.CENTER, false, false));
			addDateTagButton.addListener(SWT.Selection, addDateTagListener);   
		} else {
			Dialog.applyDialogFont(buttonComp);
			buttonWidth= SWTUtils.calculateControlSize(converter, new Button [] { configureTagsButton, refreshButton });
		}
		
		refreshButton.setLayoutData(SWTUtils.createGridData(buttonWidth, SWT.DEFAULT, SWT.END, SWT.CENTER, false, false));
		configureTagsButton.setLayoutData(SWTUtils.createGridData(buttonWidth, SWT.DEFAULT, SWT.END, SWT.CENTER, false, false));
		
		refreshButton.addListener(SWT.Selection, event -> refresh(false));
		
		configureTagsButton.addListener(SWT.Selection, event -> {
			TagConfigurationDialog d = new TagConfigurationDialog(shell, tagSource);
			d.open();
		});
		
		PlatformUI.getWorkbench().getHelpSystem().setHelp(refreshButton, IHelpContextIds.TAG_CONFIGURATION_REFRESHACTION);
		PlatformUI.getWorkbench().getHelpSystem().setHelp(configureTagsButton, IHelpContextIds.TAG_CONFIGURATION_OVERVIEW);		
		Dialog.applyDialogFont(buttonComp);
	}
	
	
	public void refresh(final boolean background) {
		try {
			getRunnableContext().run(true, true, monitor -> {
				try {
					setBusy(true);
					Display.getDefault().asyncExec(() -> {
						if (!fMessageLabel.isDisposed())
							fMessageLabel.setText(CVSUIMessages.TagRefreshButtonArea_6);
					});
					monitor.beginTask(CVSUIMessages.TagRefreshButtonArea_5, 100);
					final CVSTag[] tags = tagSource.refresh(false, Policy.subMonitorFor(monitor, 70));
					Display.getDefault().asyncExec(() -> {
						if (!fMessageLabel.isDisposed())
							fMessageLabel.setText(
									background && tags.length == 0 ? CVSUIMessages.TagRefreshButtonArea_7 : ""); //$NON-NLS-1$
					});
					if (!background && tags.length == 0 && promptForBestEffort()) {
						tagSource.refresh(true, Policy.subMonitorFor(monitor, 30));
					}
				} catch (TeamException e) {
					throw new InvocationTargetException(e);
				} finally {
					setBusy(false);
					monitor.done();
				}
			});
		} catch (InterruptedException e) {
			// operation cancelled
		} catch (InvocationTargetException e) {
			CVSUIPlugin.openError(shell, CVSUIMessages.TagConfigurationDialog_14, null, e); 
		}
	}
	
	private void setBusy(final boolean busy) {
		if (shell != null && !shell.isDisposed())
			shell.getDisplay().asyncExec(() -> {
				if (!refreshButton.isDisposed())
					refreshButton.setEnabled(!busy);
			});
	}
	
	private boolean promptForBestEffort() {
		final boolean[] prompt = new boolean[] { false };
		shell.getDisplay().syncExec(() -> {
			MessageDialog dialog = new MessageDialog(shell, CVSUIMessages.TagRefreshButtonArea_0, null,
					getNoTagsFoundMessage(), MessageDialog.INFORMATION,
					new String[] { CVSUIMessages.TagRefreshButtonArea_1, CVSUIMessages.TagRefreshButtonArea_2,
							CVSUIMessages.TagRefreshButtonArea_3 },
					1);
			int code = dialog.open();
			if (code == 0) {
				prompt[0] = true;
			} else if (code == 1) {
				TagConfigurationDialog d = new TagConfigurationDialog(shell, tagSource);
				d.open();
			}

		});
		return prompt[0];
	}
	
	private String getNoTagsFoundMessage() {
		return NLS.bind(CVSUIMessages.TagRefreshButtonArea_4, new String[] { tagSource.getShortDescription() }); 
	}
	
	public void setTagSource(TagSource tagSource) {
		Assert.isNotNull(tagSource);
		this.tagSource = tagSource;
	}

	public IRunnableContext getRunnableContext() {
		if (context == null)
			return PlatformUI.getWorkbench().getProgressService();
		return context;
	}
	
	public void setRunnableContext(IRunnableContext context) {
		this.context = context;
	}
}