/*******************************************************************************
 * Copyright (c) 2002 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.xml.ui.internal.catalog;

import java.io.ByteArrayInputStream;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.window.Window;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.SaveAsDialog;
import org.eclipse.wst.common.ui.internal.dialogs.SelectSingleFileDialog;
import org.eclipse.wst.xml.core.internal.catalog.CatalogSet;
import org.eclipse.wst.xml.core.internal.catalog.provisional.ICatalog;
import org.eclipse.wst.xml.ui.internal.XMLUIPlugin;

public class AdvancedOptionsDialog extends Dialog {
	protected ICatalog workingUserCatalog;

	public AdvancedOptionsDialog(Shell parentShell, ICatalog workingUserCatalog) {
		super(parentShell);
		setShellStyle(getShellStyle() | SWT.RESIZE);
		this.workingUserCatalog = workingUserCatalog;
	}


	protected void createButtonsForButtonBar(Composite parent) {
		createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
	}


	protected Control createDialogArea(Composite parent) {
		Composite dialogArea = (Composite) super.createDialogArea(parent);
		// WorkbenchHelp.setHelp(dialogArea, new
		// ControlContextComputer(dialogArea,
		// XMLBuilderContextIds.XMLP_PROJECT_DIALOG));

		Composite composite = new Composite(dialogArea, SWT.NONE);
		composite.setLayout(new GridLayout());
		composite.setLayoutData(new GridData(GridData.FILL_BOTH));

		Label label = new Label(composite, SWT.NONE);
		label.setText(XMLCatalogMessages.UI_LABEL_DIALOG_DESCRIPTION);

		Composite buttonComposite = new Composite(composite, SWT.NONE);
		GridLayout gridLayout = new GridLayout();
		gridLayout.numColumns = 3;
		buttonComposite.setLayout(gridLayout);
		buttonComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		Composite placeHolder = new Composite(buttonComposite, SWT.NONE);
		placeHolder.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		Composite buttonGroup = new Composite(buttonComposite, SWT.NONE);
		gridLayout = new GridLayout();
		gridLayout.numColumns = 2;
		gridLayout.makeColumnsEqualWidth = true;
		buttonGroup.setLayout(gridLayout);
		buttonGroup.setLayoutData(createGridData());

		Button importButton = new Button(buttonGroup, SWT.PUSH | SWT.CENTER);
		importButton.setText("  " + XMLCatalogMessages.UI_BUTTON_IMPORT + "  "); //$NON-NLS-1$ //$NON-NLS-2$

		Button exportButton = new Button(buttonGroup, SWT.PUSH | SWT.CENTER);
		exportButton.setText("  " + XMLCatalogMessages.UI_BUTTON_EXPORT + "  "); //$NON-NLS-1$ //$NON-NLS-2$

		placeHolder = new Composite(buttonComposite, SWT.NONE);
		placeHolder.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		// add importButton listener
		SelectionListener importButtonSelectionListener = new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				invokeImportDialog();
			}
		};
		importButton.addSelectionListener(importButtonSelectionListener);

		// add exportButton listener
		SelectionListener exportButtonSelectionListener = new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				invokeExportDialog();
			}
		};
		exportButton.addSelectionListener(exportButtonSelectionListener);

		return dialogArea;
	}

	protected GridData createGridData() {
		GridData gd = new GridData(GridData.CENTER);
		gd.horizontalAlignment = GridData.HORIZONTAL_ALIGN_CENTER;
		gd.verticalAlignment = GridData.VERTICAL_ALIGN_CENTER;
		return gd;
	}


	protected void invokeImportDialog() {
		SelectSingleFileDialog dialog = new SelectSingleFileDialog(getShell(), null, true);
		String[] extensions = {".xmlcatalog", ".xml"}; //$NON-NLS-1$ //$NON-NLS-2$
		dialog.addFilterExtensions(extensions);
		dialog.create();
		dialog.getShell().setText(XMLCatalogMessages.UI_LABEL_IMPORT_DIALOG_TITLE);
		dialog.setTitle(XMLCatalogMessages.UI_LABEL_IMPORT_DIALOG_HEADING);
		dialog.setMessage(XMLCatalogMessages.UI_LABEL_IMPORT_DIALOG_MESSAGE);
		dialog.setBlockOnOpen(true);
		int rc = dialog.open();
		if (rc == Window.OK) {
			IFile file = dialog.getFile();
			if (file != null) {
				String fileName = file.getLocation().toFile().toURI().toString();
				try {
					CatalogSet tempResourceSet = new CatalogSet();
					ICatalog newCatalog = tempResourceSet.lookupOrCreateCatalog("temp", fileName); //$NON-NLS-1$
					workingUserCatalog.addEntriesFromCatalog(newCatalog);
				}
				catch (Exception e) {
					// TODO... give error message
				}
			}
			close();
		}
	}


	protected void invokeExportDialog() {
		IPath originalFilePath = null;
		IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
		if (projects.length > 0) {
			originalFilePath = projects[0].getFullPath().append(".xmlcatalog"); //$NON-NLS-1$
		}

		SaveAsDialog dialog = new SaveAsDialog(getShell());
		if (originalFilePath != null) {
			IFile originalFile = ResourcesPlugin.getWorkspace().getRoot().getFile(originalFilePath);
			dialog.setOriginalFile(originalFile);
		}
		dialog.create();

		dialog.getShell().setText(XMLCatalogMessages.UI_LABEL_EXPORT_DIALOG_TITLE);
		dialog.setTitle(XMLCatalogMessages.UI_LABEL_EXPORT_DIALOG_HEADING);
		dialog.setMessage(XMLCatalogMessages.UI_LABEL_EXPORT_DIALOG_MESSAGE);

		dialog.setBlockOnOpen(true);
		int rc = dialog.open();
		if (rc == Window.OK) {
			IPath path = dialog.getResult();
			if (path != null) {
				IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
				String fileName = file.getLocation().toFile().toURI().toString();

				// here we save the catalog entries to the selected file
				try {
					createFileIfRequired(file);
					workingUserCatalog.setLocation(fileName);
					workingUserCatalog.save();
				}
				catch (Exception ex) {
					try {
						String title = XMLCatalogMessages.UI_LABEL_CATALOG_SAVE_ERROR;
						String briefMessage = XMLCatalogMessages.UI_LABEL_CATALOG_COULD_NOT_BE_SAVED;
						String reason = file.isReadOnly() ? NLS.bind(XMLCatalogMessages.UI_LABEL_FILE_IS_READ_ONLY, fileName) : NLS.bind(XMLCatalogMessages.ERROR_SAVING_FILE, fileName);
						String details = NLS.bind(XMLCatalogMessages.ERROR_SAVING_FILE, fileName);

						ErrorDialog.openError(Display.getCurrent().getActiveShell(), title, briefMessage, createStatus(reason, details));
					}
					catch (Exception ex2) {
					}
				}
				close();
			}
		}
	}

	// TODO... This was copied from WindowUtility. Is there an easier way to
	// create a status object?
	// If not, we should open an eclipse bug or add a similar utility to
	// baseExtensionsUI.
	//
	private static IStatus createStatus(String reason, String msg) {
		String pluginId = XMLUIPlugin.getDefault().getBundle().getSymbolicName();
		MultiStatus multiStatus = new MultiStatus(pluginId, 0, reason, null);
		Status status = new Status(IStatus.ERROR, pluginId, 0, msg, null);
		multiStatus.add(status);
		return multiStatus;
	}


	protected void createFileIfRequired(IFile file) {
		try {
			if ((file != null) && !file.exists()) {
				ByteArrayInputStream inputStream = new ByteArrayInputStream(new byte[0]);
				file.create(inputStream, true, null);
				// createEmptyXMLCatalog(file);
			}
		}
		catch (Exception e) {
		}
	}
}