/*
 * Copyright (C) 2011 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.portal.config.serialize;

import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.exoplatform.portal.config.model.LocalizedString;
import org.jibx.runtime.IAliasable;
import org.jibx.runtime.IMarshaller;
import org.jibx.runtime.IMarshallingContext;
import org.jibx.runtime.IUnmarshaller;
import org.jibx.runtime.IUnmarshallingContext;
import org.jibx.runtime.JiBXException;
import org.jibx.runtime.JiBXParseException;
import org.jibx.runtime.impl.UnmarshallingContext;

/**
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 */
public class LocalizedValueMapper implements IUnmarshaller, IAliasable, IMarshaller {

    /** . */
    private String marshalURI;

    /** . */
    private String marshallName;

    public LocalizedValueMapper(String uri, int index, String name) {
        this.marshalURI = uri;
        this.marshallName = name;
    }

    public LocalizedValueMapper() {
        this.marshalURI = null;
        this.marshallName = "label";
    }

    public boolean isPresent(IUnmarshallingContext ctx) throws JiBXException {
        return ctx.isAt(marshalURI, marshallName);
    }

    private static final Pattern RFC1766_PATTERN = Pattern.compile("^([a-zA-Z]{2})(?:-([a-zA-Z]{2}))?$");

    public Object unmarshal(Object o, IUnmarshallingContext ictx) throws JiBXException {
        UnmarshallingContext ctx = (UnmarshallingContext) ictx;
        if (!ctx.isAt(marshalURI, marshallName)) {
            ctx.throwStartTagNameError(marshalURI, marshallName);
        }
        int count = ctx.getAttributeCount();
        Locale lang = null;
        for (int i = 0; i < count; i++) {
            String attrName = ctx.getAttributeName(i);
            if (attrName.equals("xml:lang") || attrName.equals("lang")) {
                String attrValue = ctx.getAttributeValue(i).trim();
                Matcher matcher = RFC1766_PATTERN.matcher(attrValue);
                if (matcher.matches()) {
                    String langISO = matcher.group(1);
                    String countryISO = matcher.group(2);
                    if (countryISO == null) {
                        lang = new Locale(langISO.toLowerCase());
                    } else {
                        lang = new Locale(langISO.toLowerCase(), countryISO.toLowerCase());
                    }
                } else {
                    throw new JiBXParseException("The attribute xml:lang " + attrValue
                            + " does not represent a valid language as defined by RFC 1766", attrValue);
                }
                break;
            }
        }
        ctx.parsePastStartTag(marshalURI, marshallName);
        String value = ctx.getText();
        ctx.parsePastEndTag(marshalURI, marshallName);
        return new LocalizedString(value, lang);
    }

    //

    public boolean isExtension(String s) {
        throw new UnsupportedOperationException();
    }

    public void marshal(Object o, IMarshallingContext iMarshallingContext) throws JiBXException {
        throw new UnsupportedOperationException();
    }
}
