/*
 * Copyright (c) 2012, grossmann, waheckma
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

package org.jowidgets.addons.widgets.ole.document.impl;

import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;

import org.jowidgets.addons.widgets.ole.api.IOleControl;
import org.jowidgets.addons.widgets.ole.document.api.IOleDocument;
import org.jowidgets.addons.widgets.ole.document.api.IOleDocumentSetupBuilder;
import org.jowidgets.tools.widgets.wrapper.ControlWrapper;
import org.jowidgets.util.Assert;
import org.jowidgets.util.event.ChangeObservable;
import org.jowidgets.util.event.IChangeListener;
import org.jowidgets.util.io.FileUtils;
import org.jowidgets.util.io.ITempFileFactory;

class OleDocumentImpl extends ControlWrapper implements IOleDocument {

    private final String progId;
    private final ChangeObservable documentChangeObservable;
    private final ITempFileFactory tempFileFactory;

    OleDocumentImpl(final IOleControl oleControl, final IOleDocumentSetupBuilder<?> setup) {
        super(oleControl);
        Assert.paramNotNull(setup.getTempFileFactory(), "setup.getTempFileFactory()");
        Assert.paramNotNull(setup.getProgId(), "setup.getProgId()");

        this.progId = setup.getProgId();
        this.tempFileFactory = setup.getTempFileFactory();
        this.documentChangeObservable = new ChangeObservable();

        if (progId != null) {
            oleControl.setDocument(progId);
        }
    }

    @Override
    protected IOleControl getWidget() {
        return (IOleControl) super.getWidget();
    }

    @Override
    public boolean saveDocument(final File file, final boolean includeOleInfo) {
        Assert.paramNotNull(file, "file");
        return getWidget().saveCurrentDocument(file, includeOleInfo);
    }

    @Override
    public boolean saveDocument(final OutputStream outputStream) {
        Assert.paramNotNull(outputStream, "outputStream");
        File tempFile = null;
        try {
            tempFile = createTempFile();
            final boolean saved = getWidget().saveCurrentDocument(tempFile, true);
            if (saved) {
                FileUtils.fileToOutputStream(tempFile, outputStream);
                return true;
            }
            else {
                return false;
            }
        }
        finally {
            deleteFile(tempFile);
        }
    }

    @Override
    public void openNewDocument() {
        if (progId != null) {
            getWidget().setDocument(progId);
        }
        else {
            getWidget().clearDocument();
        }
        documentChangeObservable.fireChangedEvent();
    }

    @Override
    public void openDocument(final File file) {
        Assert.paramNotNull(file, "file");
        if (progId != null) {
            getWidget().setDocument(progId, file);
        }
        else {
            getWidget().setDocument(file);
        }
        documentChangeObservable.fireChangedEvent();
    }

    @Override
    public void openDocument(final InputStream inputStream) {
        Assert.paramNotNull(inputStream, "inputStream");
        File tempFile = null;
        try {
            tempFile = createTempFile();
            FileUtils.inputStreamToFile(inputStream, tempFile);
            openDocument(tempFile);
        }
        finally {
            deleteFile(tempFile);
        }
    }

    @Override
    public boolean isDirty() {
        return getWidget().isDirty();
    }

    @Override
    public IOleControl getOleControl() {
        return getWidget();
    }

    @Override
    public void addDocumentChangeListener(final IChangeListener changeListener) {
        documentChangeObservable.addChangeListener(changeListener);
    }

    @Override
    public void removeDocumentChangeListener(final IChangeListener changeListener) {
        documentChangeObservable.removeChangeListener(changeListener);
    }

    private File createTempFile() {
        return tempFileFactory.create("OleDocumentTemp", "");
    }

    private static void deleteFile(final File file) {
        if (file != null && file.exists()) {
            if (!file.delete()) {
                throw new RuntimeException("Tempfile could not be deleted");
            }
        }
    }

}