/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2013, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * 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.wildfly.extension.undertow.deployment;

import java.io.IOException;
import java.io.InputStream;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

import org.jboss.as.ee.structure.DeploymentType;
import org.jboss.as.ee.structure.DeploymentTypeMarker;
import org.jboss.as.ee.structure.JBossDescriptorPropertyReplacement;
import org.jboss.as.server.deployment.Attachments;
import org.jboss.as.server.deployment.DeploymentPhaseContext;
import org.jboss.as.server.deployment.DeploymentUnit;
import org.jboss.as.server.deployment.DeploymentUnitProcessingException;
import org.jboss.as.server.deployment.DeploymentUnitProcessor;
import org.jboss.as.web.common.WarMetaData;
import org.jboss.metadata.parser.jbossweb.JBossWebMetaDataParser;
import org.jboss.metadata.parser.util.NoopXMLResolver;
import org.jboss.metadata.web.jboss.JBossWebMetaData;
import org.jboss.vfs.VirtualFile;
import org.wildfly.extension.undertow.logging.UndertowLogger;


/**
 * @author Jean-Frederic Clere
 */
public class JBossWebParsingDeploymentProcessor implements DeploymentUnitProcessor {

    private static final String JBOSS_WEB_XML = "WEB-INF/jboss-web.xml";

    @Override
    public void deploy(DeploymentPhaseContext phaseContext) throws DeploymentUnitProcessingException {
        final DeploymentUnit deploymentUnit = phaseContext.getDeploymentUnit();
        if (!DeploymentTypeMarker.isType(DeploymentType.WAR, deploymentUnit)) {
            return; // Skip non web deployments
        }
        final VirtualFile deploymentRoot = deploymentUnit.getAttachment(Attachments.DEPLOYMENT_ROOT).getRoot();
        final VirtualFile jbossWebXml = deploymentRoot.getChild(JBOSS_WEB_XML);
        WarMetaData warMetaData = deploymentUnit.getAttachment(WarMetaData.ATTACHMENT_KEY);
        assert warMetaData != null;
        if (jbossWebXml.exists()) {
            InputStream is = null;
            try {
                is = jbossWebXml.openStream();
                final XMLInputFactory inputFactory = XMLInputFactory.newInstance();
                inputFactory.setXMLResolver(NoopXMLResolver.create());
                XMLStreamReader xmlReader = inputFactory.createXMLStreamReader(is);

                final JBossWebMetaData jBossWebMetaData = JBossWebMetaDataParser.parse(xmlReader, JBossDescriptorPropertyReplacement.propertyReplacer(deploymentUnit));
                warMetaData.setJBossWebMetaData(jBossWebMetaData);
                // if the jboss-web.xml has a distinct-name configured, then attach the value to this
                // deployment unit
                if (jBossWebMetaData.getDistinctName() != null) {
                    deploymentUnit.putAttachment(org.jboss.as.ee.structure.Attachments.DISTINCT_NAME, jBossWebMetaData.getDistinctName());
                }
            } catch (XMLStreamException e) {
                throw new DeploymentUnitProcessingException(UndertowLogger.ROOT_LOGGER.failToParseXMLDescriptor(jbossWebXml.toString(), e.getLocation().getLineNumber(), e.getLocation().getColumnNumber()), e);
            } catch (IOException e) {
                throw new DeploymentUnitProcessingException(UndertowLogger.ROOT_LOGGER.failToParseXMLDescriptor(jbossWebXml.toString()), e);
            } finally {
                try {
                    if (is != null) {
                        is.close();
                    }
                } catch (IOException e) {
                    // Ignore
                }
            }
        } else {
            //jboss web embedded inside jboss-all.xml
            final JBossWebMetaData jbMeta = deploymentUnit.getAttachment(WebJBossAllParser.ATTACHMENT_KEY);
            if(jbMeta != null) {
                warMetaData.setJBossWebMetaData(jbMeta);
            }
        }
    }

    @Override
    public void undeploy(DeploymentUnit context) {
    }
}
