/*******************************************************************************
 * Copyright (c) 2000, 2006 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
 *******************************************************************************/
package org.eclipse.pde.internal.ui.wizards;

import java.util.ArrayList;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.pde.internal.ui.PDEPlugin;
import org.eclipse.pde.internal.ui.PDEUIMessages;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.dialogs.SelectionStatusDialog;

public class RenameDialog extends SelectionStatusDialog {
	private ArrayList oldNames;
	private String oldName;
	private String newName;
	private Text text;
	private IStatus status;
	private boolean isCaseSensitive;
	private IInputValidator fValidator;

	/**
	 * Create a new rename dialog instance for the given window.
	 * @param shell The parent of the dialog
	 * @param oldName Current name of the item being renamed
	 */
	public RenameDialog(Shell shell, String oldName) {
		super(shell);
		this.isCaseSensitive = false;
		initialize();
		setOldName(oldName);
	}

	/**
	 * Create a new rename dialog instance for the given window.
	 * @param shell The parent of the dialog
	 * @param isCaseSensitive Flags whether dialog will perform case sensitive checks against old names
	 * @param names Set of names which the user should not be allowed to rename to
	 * @param oldName Current name of the item being renamed
	 */
	public RenameDialog(Shell shell, boolean isCaseSensitive, String[] names, String oldName) {
		super(shell);
		this.isCaseSensitive = isCaseSensitive;
		initialize();
		if (names != null) {
			for (int i = 0; i < names.length; i++)
				addOldName(names[i]);
		}
		setOldName(oldName);
	}

	public void initialize() {
		oldNames = new ArrayList();
		setStatusLineAboveButtons(true);
	}

	public void addOldName(String oldName) {
		if (!oldNames.contains(oldName))
			oldNames.add(oldName);

	}

	public void setOldName(String oldName) {
		this.oldName = oldName;
		addOldName(oldName);
		if (text != null)
			text.setText(oldName);
		this.newName = oldName;
	}

	protected Control createDialogArea(Composite parent) {
		Composite container = new Composite(parent, SWT.NULL);
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = layout.marginWidth = 9;
		container.setLayout(layout);

		GridData gd = new GridData(GridData.FILL_BOTH);
		container.setLayoutData(gd);

		Label label = new Label(container, SWT.NULL);
		label.setText(PDEUIMessages.RenameDialog_label);

		text = new Text(container, SWT.SINGLE | SWT.BORDER);
		text.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent e) {
				textChanged(text.getText());
			}
		});
		gd = new GridData(GridData.FILL_HORIZONTAL);
		text.setLayoutData(gd);
		applyDialogFont(container);
		return container;
	}

	public int open() {
		text.setText(oldName);
		text.selectAll();
		Button okButton = getButton(IDialogConstants.OK_ID);

		status = new Status(IStatus.OK, PDEPlugin.getPluginId(), IStatus.OK, "", //$NON-NLS-1$
				null);
		updateStatus(status);
		okButton.setEnabled(false);
		return super.open();
	}

	private void textChanged(String text) {
		Button okButton = getButton(IDialogConstants.OK_ID);
		if (fValidator != null) {
			String message = fValidator.isValid(text);
			if (message != null) {
				status = new Status(IStatus.ERROR, PDEPlugin.getPluginId(), IStatus.ERROR, message, null);
				updateStatus(status);
				okButton.setEnabled(false);
				return;
			}
		}
		for (int i = 0; i < oldNames.size(); i++) {
			if ((isCaseSensitive && text.equals(oldNames.get(i))) || (!isCaseSensitive && text.equalsIgnoreCase(oldNames.get(i).toString()))) {
				status = new Status(IStatus.ERROR, PDEPlugin.getPluginId(), IStatus.ERROR, PDEUIMessages.RenameDialog_validationError, null);
				updateStatus(status);
				okButton.setEnabled(false);
				break;
			}
			okButton.setEnabled(true);
			status = new Status(IStatus.OK, PDEPlugin.getPluginId(), IStatus.OK, "", //$NON-NLS-1$
					null);
			updateStatus(status);
		}
	}

	public String getNewName() {
		return newName;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.dialogs.Dialog#okPressed()
	 */
	protected void okPressed() {
		newName = text.getText().trim();
		super.okPressed();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.dialogs.SelectionStatusDialog#computeResult()
	 */
	protected void computeResult() {
	}

	public void setTitle(String title) {
		getShell().setText(title);
	}

	public void setInputValidator(IInputValidator validator) {
		fValidator = validator;
	}
}