/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
package complex.sfx2.tools;

import com.sun.star.accessibility.AccessibleRole;
import com.sun.star.accessibility.XAccessible;
import com.sun.star.accessibility.XAccessibleAction;
import com.sun.star.accessibility.XAccessibleContext;
import com.sun.star.awt.XExtendedToolkit;
import com.sun.star.awt.XWindow;
import com.sun.star.frame.XDesktop;
import com.sun.star.lang.XComponent;
import com.sun.star.lang.XMultiServiceFactory;
import com.sun.star.text.XTextDocument;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.util.XCloseable;

import util.AccessibilityTools;
import util.WriterTools;


/**
 * Methods to open Writer docs
 *
 */
public class WriterHelper {
    private XMultiServiceFactory m_xMSF = null;

    /** Creates a new instance of WriterHelper
     * @param xMSF The MultiServiceFactory gained from the office
     */
    public WriterHelper(XMultiServiceFactory xMSF) {
        this.m_xMSF = xMSF;
    }

    /** Opens an empty document
     * @return a reference to the opened document is returned
     */
    public XTextDocument openEmptyDoc() {
        return WriterTools.createTextDoc(m_xMSF);
    }

    /** Closes a given XTextDocument
     * @param xTextDoc the text document to be closed
     * @return if an error occurs the errormessage is returned and an empty String if not
     */
    public String closeDoc(XTextDocument xTextDoc) {
        XCloseable closer = UnoRuntime.queryInterface(XCloseable.class, xTextDoc);
        String err = "";

        try {
            closer.close(true);
        } catch (com.sun.star.util.CloseVetoException e) {
            err = "couldn't close document " + e;
            System.out.println(err);
        }

        return err;
    }

    private XTextDocument xLocalDoc = null;
    /** a TextDocument is opened by pressing a button in a dialog given by uno-URL
     * @param url the uno-URL of the dialog to be opened
     * @param createButton the language dependent label of the button to be pressed
     * @param destroyLocal if true the document that has been opened to dispatch the dialog is closed before the method returns,
     * otherwise this document remains open
     * @return returns the created Textdocument
     */
    public XTextDocument openFromDialog(String url, String createButton,
                                        boolean destroyLocal) {
        xLocalDoc = WriterTools.createTextDoc(m_xMSF);
        XComponent comp = UnoRuntime.queryInterface(XComponent.class, xLocalDoc);
        DialogThread diagThread = new DialogThread(comp, m_xMSF, url);
        diagThread.start();
        shortWait();

        if (createButton.length() > 1) {
            XExtendedToolkit tk = getToolkit();
            Object atw = tk.getActiveTopWindow();

            XWindow xWindow = UnoRuntime.queryInterface(XWindow.class, atw);

            XAccessible xRoot = AccessibilityTools.getAccessibleObject(xWindow);
            XAccessibleContext buttonContext = AccessibilityTools.getAccessibleObjectForRole(
                                                       xRoot,
                                                       AccessibleRole.PUSH_BUTTON,
                                                       createButton);

            XAccessibleAction buttonAction = UnoRuntime.queryInterface(XAccessibleAction.class, buttonContext);

            try {
                System.out.println("Name: " +
                                   buttonContext.getAccessibleName());
                buttonAction.doAccessibleAction(0);
            } catch (com.sun.star.lang.IndexOutOfBoundsException e) {
                System.out.println("Couldn't press button");
            }

            shortWait();
        }

        XDesktop xDesktop = getDesktop();

        XTextDocument returnDoc = UnoRuntime.queryInterface(XTextDocument.class, xDesktop.getCurrentComponent());

        if (destroyLocal) {
            closeDoc(xLocalDoc);
            xLocalDoc = null;
        }

        return returnDoc;
    }
    public void closeFromDialog()
    {
        closeDoc(xLocalDoc);
        xLocalDoc = null;
    }





    /**
    * Sleeps for 2 sec. to allow StarOffice to react
    */
    private void shortWait() {
        try {
            Thread.sleep(4000);
        } catch (InterruptedException e) {
            System.out.println("While waiting :" + e);
        }
    }

    /** creates an instance of com.sun.star.awt.Toolkit to query the XExtendedToolkit
     * interface
     * @return returns the gained XExtendedToolkit Interface
     */
    public XExtendedToolkit getToolkit() {
        Object toolkit = null;

        try {
            toolkit = m_xMSF.createInstance("com.sun.star.awt.Toolkit");
        } catch (com.sun.star.uno.Exception e) {
            System.out.println("Couldn't get toolkit");
            e.printStackTrace( System.err );
        }

        XExtendedToolkit tk = UnoRuntime.queryInterface(XExtendedToolkit.class, toolkit);

        return tk;
    }

    /** creates an instance of com.sun.star.frame.Desktop to query the XDesktop interface
     * @return returns the gained XDesktop interface
     */
    private XDesktop getDesktop() {
        Object desk = null;

        try {
            desk = m_xMSF.createInstance("com.sun.star.frame.Desktop");
        } catch (com.sun.star.uno.Exception e) {
            System.out.println("Couldn't get desktop");
            e.printStackTrace( System.err );
        }

        XDesktop xDesktop = UnoRuntime.queryInterface(XDesktop.class, desk);

        return xDesktop;
    }
}