/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2012, 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.jboss.as.connector.deployers.ra.processors;

import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.resource.ResourceException;

import org.jboss.as.connector.util.ConnectorServices;
import org.jboss.as.ee.component.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.server.deployment.SetupAction;
import org.jboss.jca.core.api.connectionmanager.ccm.CachedConnectionManager;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.msc.value.InjectedValue;

/**
 * Setup processor that adds sets operations for the cached connection manager. These operations are run around
 * incoming requests.
 *
 * @author Stuart Douglas
 */
public class CachedConnectionManagerSetupProcessor implements DeploymentUnitProcessor {

    private static final ServiceName SERVICE_NAME = ServiceName.of("jca", "cachedConnectionManagerSetupProcessor");


    @Override
    public void deploy(final DeploymentPhaseContext phaseContext) throws DeploymentUnitProcessingException {
        final DeploymentUnit deploymentUnit = phaseContext.getDeploymentUnit();
        final ServiceName serviceName = deploymentUnit.getServiceName().append(SERVICE_NAME);
        final CachedConnectionManagerSetupAction action = new CachedConnectionManagerSetupAction(serviceName);

        phaseContext.getServiceTarget().addService(serviceName, action)
                .addDependency(ConnectorServices.CCM_SERVICE, CachedConnectionManager.class, action.cachedConnectionManager)
                .addDependency(ConnectorServices.NON_TX_CCM_SERVICE, CachedConnectionManager.class, action.noTxCcmValue)
                .install();
        deploymentUnit.addToAttachmentList(Attachments.WEB_SETUP_ACTIONS, action);
        deploymentUnit.addToAttachmentList(Attachments.OTHER_EE_SETUP_ACTIONS, action);

    }

    @Override
    public void undeploy(final DeploymentUnit deploymentUnit) {
        deploymentUnit.getAttachmentList(Attachments.OTHER_EE_SETUP_ACTIONS).removeIf(setupAction -> setupAction instanceof CachedConnectionManagerSetupAction);
        deploymentUnit.getAttachmentList(Attachments.WEB_SETUP_ACTIONS).removeIf(setupAction -> setupAction instanceof CachedConnectionManagerSetupAction);
    }

    private static class CachedConnectionManagerSetupAction implements SetupAction, Service<Void> {

        private final InjectedValue<CachedConnectionManager> cachedConnectionManager = new InjectedValue<CachedConnectionManager>();
        private final InjectedValue<CachedConnectionManager> noTxCcmValue = new InjectedValue<CachedConnectionManager>();

        private final ServiceName serviceName;

        private static final Set<?> unsharable = new HashSet<Object>();

        private CachedConnectionManagerSetupAction(final ServiceName serviceName) {
            this.serviceName = serviceName;
        }


        @Override
        public void setup(final Map<String, Object> properties) {
            try {
                final CachedConnectionManager noTxCcm = noTxCcmValue.getOptionalValue();
                if (noTxCcm != null) {
                    noTxCcm.pushMetaAwareObject(this, unsharable);
                }
                final CachedConnectionManager connectionManager = cachedConnectionManager.getOptionalValue();
                if (connectionManager != null) {
                    connectionManager.pushMetaAwareObject(this, unsharable);
                }
            } catch (ResourceException e) {
                throw new RuntimeException(e);
            }
        }

        @Override
        public void teardown(final Map<String, Object> properties) {
            try {
                final CachedConnectionManager connectionManager = cachedConnectionManager.getOptionalValue();
                if (connectionManager != null) {
                    connectionManager.popMetaAwareObject(unsharable);
                }
                final CachedConnectionManager noTxCcm = noTxCcmValue.getOptionalValue();
                if (noTxCcm != null) {
                    noTxCcm.popMetaAwareObject(unsharable);
                }
            } catch (ResourceException e) {
                throw new RuntimeException(e);
            }
        }

        @Override
        public int priority() {
            return 0;
        }

        @Override
        public Set<ServiceName> dependencies() {
            return Collections.singleton(serviceName);
        }

        @Override
        public void start(final StartContext context) throws StartException {

        }

        @Override
        public void stop(final StopContext context) {

        }

        @Override
        public Void getValue() throws IllegalStateException, IllegalArgumentException {
            return null;
        }
    }
}