/*
 * 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.pentaho.output;

import org.libreoffice.report.pentaho.OfficeNamespaces;
import org.libreoffice.report.pentaho.model.DataStyle;
import org.libreoffice.report.pentaho.model.FontFaceDeclsSection;
import org.libreoffice.report.pentaho.model.FontFaceElement;
import org.libreoffice.report.pentaho.model.OfficeMasterPage;
import org.libreoffice.report.pentaho.model.OfficeMasterStyles;
import org.libreoffice.report.pentaho.model.OfficeStyle;
import org.libreoffice.report.pentaho.model.OfficeStyles;
import org.libreoffice.report.pentaho.model.OfficeStylesCollection;
import org.libreoffice.report.pentaho.model.PageLayout;
import org.libreoffice.report.pentaho.model.RawText;

import java.io.IOException;
import java.io.Writer;

import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;

import org.jfree.layouting.namespace.Namespaces;
import org.jfree.layouting.util.AttributeMap;
import org.jfree.report.JFreeReportBoot;
import org.jfree.report.JFreeReportInfo;
import org.jfree.report.structure.Element;
import org.jfree.report.structure.Node;
import org.jfree.report.structure.Section;
import org.jfree.report.structure.StaticText;

import org.pentaho.reporting.libraries.xmlns.common.AttributeList;
import org.pentaho.reporting.libraries.xmlns.writer.DefaultTagDescription;
import org.pentaho.reporting.libraries.xmlns.writer.XmlWriter;
import org.pentaho.reporting.libraries.xmlns.writer.XmlWriterSupport;


/**
 * This class writes the style collection into a 'styles.xml' document.
 *
 * @since 09.03.2007
 */
public class StylesWriter
{

    private final XmlWriter xmlWriter;
    private final boolean writeOpeningTag;

    public StylesWriter(final Writer writer)
    {
        final DefaultTagDescription tagDescription = new DefaultTagDescription();
        tagDescription.configure(JFreeReportBoot.getInstance().getGlobalConfig(),
                OfficeDocumentReportTarget.TAG_DEF_PREFIX);

        this.xmlWriter = new XmlWriter(writer, tagDescription);
        this.xmlWriter.setAlwaysAddNamespace(true);
        this.writeOpeningTag = true;
    }

    public StylesWriter(final XmlWriter xmlWriter)
    {
        this.xmlWriter = xmlWriter;
        this.writeOpeningTag = false;
    }

    public void writeContentStyles(
            final OfficeStylesCollection globals)
            throws IOException
    {
        writeFontFaces(new OfficeStylesCollection[]
                {
                    globals
                });
        writeAutomaticStylesSection(new OfficeStylesCollection[]
                {
                    globals
                });
    }

    public void writeGlobalStyles(
            final OfficeStylesCollection globals)
            throws IOException
    {
        if (writeOpeningTag)
        {
            performWriteRootTag();
        }

        writeFontFaces(new OfficeStylesCollection[]
                {
                    globals
                });
        writeCommonStylesSection(new OfficeStylesCollection[]
                {
                    globals
                });
        writeAutomaticStylesSection(new OfficeStylesCollection[]
                {
                    globals
                });
        writeMasterStylesSection(new OfficeStylesCollection[]
                {
                    globals
                });

        if (writeOpeningTag)
        {
            xmlWriter.writeCloseTag();
        }
    }

    private void writeMasterStylesSection(final OfficeStylesCollection[] osc)
            throws IOException
    {
        xmlWriter.writeTag(OfficeNamespaces.OFFICE_NS, "master-styles", XmlWriterSupport.OPEN);
        for (int sci = 0; sci < osc.length; sci++)
        {
            final OfficeStylesCollection collection = osc[sci];
            final OfficeMasterStyles officeStyles = collection.getMasterStyles();
            final OfficeMasterPage[] officeMasterPages = officeStyles.getAllMasterPages();
            for (int i = 0; i < officeMasterPages.length; i++)
            {
                final OfficeMasterPage masterPage = officeMasterPages[i];
                writeSection(masterPage);
            }

            writeSectionChildren(officeStyles.getOtherNodes().getNodeArray());
        }

        xmlWriter.writeCloseTag();
    }

    private void writeCommonStylesSection(final OfficeStylesCollection[] osc)
            throws IOException
    {
        xmlWriter.writeTag(OfficeNamespaces.OFFICE_NS, "styles", XmlWriterSupport.OPEN);

        for (int sci = 0; sci < osc.length; sci++)
        {
            final OfficeStylesCollection collection = osc[sci];
            final OfficeStyles officeStyles = collection.getCommonStyles();
            writeStyles(officeStyles);
        }

        xmlWriter.writeCloseTag();
    }

    private void writeAutomaticStylesSection(final OfficeStylesCollection[] osc)
            throws IOException
    {
        xmlWriter.writeTag(OfficeNamespaces.OFFICE_NS, "automatic-styles", XmlWriterSupport.OPEN);
        for (int sci = 0; sci < osc.length; sci++)
        {
            final OfficeStylesCollection collection = osc[sci];
            final OfficeStyles officeStyles = collection.getAutomaticStyles();
            writeStyles(officeStyles);
        }

        xmlWriter.writeCloseTag();
    }

    private void writeFontFaces(final OfficeStylesCollection[] osc)
            throws IOException
    {
        xmlWriter.writeTag(OfficeNamespaces.OFFICE_NS, "font-face-decls", XmlWriterSupport.OPEN);

        final TreeMap<String,FontFaceElement> fontFaces = new TreeMap<String,FontFaceElement>();
        for (int sci = 0; sci < osc.length; sci++)
        {
            final OfficeStylesCollection collection = osc[sci];
            final FontFaceDeclsSection fontFaceDecls = collection.getFontFaceDecls();
            final FontFaceElement[] fontFaceElements = fontFaceDecls.getAllFontFaces();
            for (int i = 0; i < fontFaceElements.length; i++)
            {
                final FontFaceElement element = fontFaceElements[i];
                fontFaces.put(element.getStyleName(), element);
            }
        }

        final Iterator<FontFaceElement> values = fontFaces.values().iterator();
        while (values.hasNext())
        {
            final FontFaceElement element = values.next();
            writeElement(element);
        }

        xmlWriter.writeCloseTag();
    }

    private void writeStyles(final OfficeStyles styles)
            throws IOException
    {
        final OfficeStyle[] allStyles = styles.getAllStyles();
        for (int i = 0; i < allStyles.length; i++)
        {
            final OfficeStyle style = allStyles[i];
            writeSection(style);
        }

        final DataStyle[] allDataStyles = styles.getAllDataStyles();
        for (int i = 0; i < allDataStyles.length; i++)
        {
            final DataStyle style = allDataStyles[i];
            writeSection(style);
        }

        final PageLayout[] allPageStyles = styles.getAllPageStyles();
        for (int i = 0; i < allPageStyles.length; i++)
        {
            final PageLayout style = allPageStyles[i];
            writeSection(style);
        }

        writeSectionChildren(styles.getOtherStyles());
    }

    private void writeElement(final Element element)
            throws IOException
    {
        final String type = element.getType();
        final String namespace = element.getNamespace();
        final AttributeList attrList = buildAttributeList(element.getAttributeMap());
        xmlWriter.writeTag(namespace, type, attrList, XmlWriterSupport.CLOSE);
    }

    private void writeSection(final Section section)
            throws IOException
    {
        final String type = section.getType();
        final String namespace = section.getNamespace();
        final AttributeList attrList = buildAttributeList(section.getAttributeMap());
        if (section.getNodeCount() == 0)
        {
            xmlWriter.writeTag(namespace, type, attrList, XmlWriterSupport.CLOSE);
            return;
        }

        xmlWriter.writeTag(namespace, type, attrList, XmlWriterSupport.OPEN);
        writeSectionChildren(section.getNodeArray());

        xmlWriter.writeCloseTag();
    }

    private void writeSectionChildren(final Node[] nodes)
            throws IOException
    {
        for (int i = 0; i < nodes.length; i++)
        {
            final Node node = nodes[i];
            if (node instanceof Section)
            {
                writeSection((Section) node);
            }
            else if (node instanceof Element)
            {
                writeElement((Element) node);
            }
            else if (node instanceof RawText)
            {
                final RawText text = (RawText) node;
                xmlWriter.writeText(text.getText());
            }
            else if (node instanceof StaticText)
            {
                final StaticText text = (StaticText) node;
                xmlWriter.writeTextNormalized(text.getText(), false);
            }
        }
    }

    protected AttributeList buildAttributeList(final AttributeMap attrs)
    {
        final AttributeList attrList = new AttributeList();
        final String[] namespaces = attrs.getNameSpaces();
        for (int i = 0; i < namespaces.length; i++)
        {
            final String attrNamespace = namespaces[i];
            if (isFilteredNamespace(attrNamespace))
            {
                continue;
            }

            final Map localAttributes = attrs.getAttributes(attrNamespace);
            final Iterator entries = localAttributes.entrySet().iterator();
            while (entries.hasNext())
            {
                final Map.Entry entry = (Map.Entry) entries.next();
                final String key = String.valueOf(entry.getKey());
                attrList.setAttribute(attrNamespace, key, String.valueOf(entry.getValue()));
            }
        }
        return attrList;
    }

    protected boolean isFilteredNamespace(final String namespace)
    {
        if (Namespaces.LIBLAYOUT_NAMESPACE.equals(namespace))
        {
            return true;
        }
        if (JFreeReportInfo.REPORT_NAMESPACE.equals(namespace))
        {
            return true;
        }
        if (JFreeReportInfo.COMPATIBILITY_NAMESPACE.equals(namespace))
        {
            return true;
        }
        if (OfficeNamespaces.OOREPORT_NS.equals(namespace))
        {
            return true;
        }
        return false;
    }

    private void performWriteRootTag()
            throws IOException
    {
        final AttributeList rootAttributes = new AttributeList();
        rootAttributes.addNamespaceDeclaration("office",
                OfficeNamespaces.OFFICE_NS);
        rootAttributes.addNamespaceDeclaration("style", OfficeNamespaces.STYLE_NS);
        rootAttributes.addNamespaceDeclaration("text", OfficeNamespaces.TEXT_NS);
        rootAttributes.addNamespaceDeclaration("table", OfficeNamespaces.TABLE_NS);
        rootAttributes.addNamespaceDeclaration("draw", OfficeNamespaces.DRAWING_NS);
        rootAttributes.addNamespaceDeclaration("fo", OfficeNamespaces.FO_NS);
        rootAttributes.addNamespaceDeclaration("xlink", OfficeNamespaces.XLINK_NS);
        rootAttributes.addNamespaceDeclaration("dc", OfficeNamespaces.PURL_NS);
        rootAttributes.addNamespaceDeclaration("meta", OfficeNamespaces.META_NS);
        rootAttributes.addNamespaceDeclaration("number",
                OfficeNamespaces.DATASTYLE_NS);
        rootAttributes.addNamespaceDeclaration("svg", OfficeNamespaces.SVG_NS);
        rootAttributes.addNamespaceDeclaration("chart", OfficeNamespaces.CHART_NS);
        rootAttributes.addNamespaceDeclaration("chartooo", OfficeNamespaces.CHARTOOO_NS);
        rootAttributes.addNamespaceDeclaration("dr3d", OfficeNamespaces.DR3D_NS);
        rootAttributes.addNamespaceDeclaration("math", OfficeNamespaces.MATHML_NS);
        rootAttributes.addNamespaceDeclaration("form", OfficeNamespaces.FORM_NS);
        rootAttributes.addNamespaceDeclaration("script",
                OfficeNamespaces.SCRIPT_NS);
        rootAttributes.addNamespaceDeclaration("ooo", OfficeNamespaces.OO2004_NS);
        rootAttributes.addNamespaceDeclaration("ooow", OfficeNamespaces.OOW2004_NS);
        rootAttributes.addNamespaceDeclaration("oooc", OfficeNamespaces.OOC2004_NS);
        rootAttributes.addNamespaceDeclaration("dom",
                OfficeNamespaces.XML_EVENT_NS);
        rootAttributes.addNamespaceDeclaration("xforms",
                OfficeNamespaces.XFORMS_NS);
        rootAttributes.addNamespaceDeclaration("xsd", OfficeNamespaces.XSD_NS);
        rootAttributes.addNamespaceDeclaration("xsi", OfficeNamespaces.XSI_NS);
        rootAttributes.addNamespaceDeclaration("grddl", OfficeNamespaces.GRDDL_NS);
        rootAttributes.setAttribute(OfficeNamespaces.OFFICE_NS, "version",
                OfficeDocumentReportTarget.ODF_VERSION);

        this.xmlWriter.writeXmlDeclaration("UTF-8");
        this.xmlWriter.writeTag(OfficeNamespaces.OFFICE_NS,
                "document-styles", rootAttributes, XmlWriterSupport.OPEN);
    }

    public void close()
            throws IOException
    {
        xmlWriter.close();
    }
}