/*
 * 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 org.libreoffice.report;

import com.sun.star.awt.Size;
import com.sun.star.beans.PropertyValue;
import com.sun.star.beans.UnknownPropertyException;
import com.sun.star.beans.XPropertySet;
import com.sun.star.beans.XPropertySetInfo;
import com.sun.star.graphic.XGraphicProvider;
import com.sun.star.io.IOException;
import com.sun.star.io.XInputStream;
import com.sun.star.lang.WrappedTargetException;
import com.sun.star.lang.XMultiComponentFactory;
import com.sun.star.lib.uno.adapter.ByteArrayToXInputStreamAdapter;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.uno.XComponentContext;


public class SOImageService implements ImageService
{

    private final XGraphicProvider m_xGraphicProvider;

    /**
     * Creates a new instance of SOImageService
     */
    public SOImageService(final XComponentContext xCompContext)
            throws ReportExecutionException, com.sun.star.uno.Exception
    {
        if (xCompContext == null)
        {
            throw new ReportExecutionException("SOImageService constructed with null Component Context");
        }


        final XMultiComponentFactory xMCF = xCompContext.getServiceManager();
        m_xGraphicProvider = UnoRuntime.queryInterface(XGraphicProvider.class,
                xMCF.createInstanceWithContext("com.sun.star.graphic.GraphicProvider", xCompContext));

        if (m_xGraphicProvider == null)
        {
            throw new ReportExecutionException("There is no graphic-provider available for SOImageService.");
        }
    }

    private Size getImageSize(final XInputStream image) throws ReportExecutionException
    {
        final Size dim = new Size();
        try
        {
            final PropertyValue[] value = new PropertyValue[]
            {
                new PropertyValue()
            };
            value[0].Name = "InputStream";
            value[0].Value = image;

            final XPropertySet xImage = UnoRuntime.queryInterface(XPropertySet.class,
                    m_xGraphicProvider.queryGraphic(value));

            if (xImage != null)
            {
                final XPropertySetInfo xInfo = xImage.getPropertySetInfo();
                if (xInfo.hasPropertyByName("Size100thMM"))
                {
                    Size imageSize = (Size) xImage.getPropertyValue("Size100thMM");
                    dim.Width = imageSize.Width;
                    dim.Height = imageSize.Height;
                    if (dim.Height == 0 && dim.Width == 0)
                    {
                        imageSize = (Size) xImage.getPropertyValue("SizePixel");
                        final int dpi = java.awt.Toolkit.getDefaultToolkit().getScreenResolution();
                        final double fac = 2540 / (double) dpi;
                        dim.Width = (int) (imageSize.Width * fac);
                        dim.Height = (int) (imageSize.Height * fac);
                    }
                }
                else if (xInfo.hasPropertyByName("SizePixel"))
                {
                    final Size imageSize = (Size) xImage.getPropertyValue("SizePixel");
                    final int dpi = java.awt.Toolkit.getDefaultToolkit().getScreenResolution();
                    final double fac = 2540.0 / dpi;
                    dim.Width = (int) (imageSize.Width * fac);
                    dim.Height = (int) (imageSize.Height * fac);
                }
            }
        }
        catch (Exception ex)
        {
            throw new ReportExecutionException("Failed to query Image-Size", ex);
        }
        return dim;
    }

    public Size getImageSize(final byte[] image) throws ReportExecutionException
    {
        return getImageSize(new ByteArrayToXInputStreamAdapter(image));
    }

    private String getMimeType(final XInputStream image) throws ReportExecutionException
    {
        try
        {
            final PropertyValue[] value = new PropertyValue[]
            {
                new PropertyValue()
            };
            value[0].Name = "InputStream";
            value[0].Value = image;

            final XPropertySet xImage = UnoRuntime.queryInterface(XPropertySet.class,
                    m_xGraphicProvider.queryGraphic(value));

            if (xImage != null)
            {
                final XPropertySetInfo xInfo = xImage.getPropertySetInfo();
                if (xInfo.hasPropertyByName("MimeType"))
                {
                    return (String) xImage.getPropertyValue("MimeType");
                }
            }
        }
        catch (UnknownPropertyException ex)
        {
            throw new ReportExecutionException(ex);
        }
        catch (WrappedTargetException ex)
        {
            throw new ReportExecutionException(ex);
        }
        catch (com.sun.star.lang.IllegalArgumentException ex)
        {
            throw new ReportExecutionException(ex);
        }
        catch (IOException ex)
        {
            throw new ReportExecutionException(ex);
        }
        return null;
    }

    public String getMimeType(final byte[] image) throws ReportExecutionException
    {
        return getMimeType(new ByteArrayToXInputStreamAdapter(image));
    }
}