/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, 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.host.controller.operations;

import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.CORE_SERVICE;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.DISCOVERY_OPTIONS;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.HOST;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.HOST_ENVIRONMENT;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.MANAGEMENT;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.MANAGEMENT_OPERATIONS;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.MANAGEMENT_MAJOR_VERSION;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.MANAGEMENT_MICRO_VERSION;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.MANAGEMENT_MINOR_VERSION;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.NAME;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.PRODUCT_NAME;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.PRODUCT_VERSION;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.RELEASE_CODENAME;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.RELEASE_VERSION;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.SERVICE;
import static org.jboss.as.host.controller.HostControllerMessages.MESSAGES;

import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationDefinition;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.SimpleOperationDefinitionBuilder;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.as.controller.registry.Resource;
import org.jboss.as.host.controller.HostControllerEnvironment;
import org.jboss.as.host.controller.HostModelUtil;
import org.jboss.as.host.controller.ignored.IgnoredDomainResourceRegistry;
import org.jboss.as.platform.mbean.PlatformMBeanConstants;
import org.jboss.as.platform.mbean.RootPlatformMBeanResource;
import org.jboss.as.version.Version;
import org.jboss.dmr.ModelNode;
import org.jboss.modules.ModuleClassLoader;

/**
 * The handler to add the local host definition to the DomainModel.
 *
 * @author <a href="mailto:darran.lofthouse@jboss.com">Darran Lofthouse</a>
 */
public class HostModelRegistrationHandler implements OperationStepHandler {

    public static final String OPERATION_NAME = "register-host-model";

    //Private method does not need resources for description
    public static final OperationDefinition DEFINITION = new SimpleOperationDefinitionBuilder(OPERATION_NAME, null)
        .setPrivateEntry()
        .build();

    private final HostControllerEnvironment hostControllerEnvironment;
    private final IgnoredDomainResourceRegistry ignoredDomainResourceRegistry;
    private final HostModelUtil.HostModelRegistrar hostModelRegistrar;
    private final Resource modelControllerResource;

    public HostModelRegistrationHandler(final HostControllerEnvironment hostControllerEnvironment,
                                        final IgnoredDomainResourceRegistry ignoredDomainResourceRegistry,
                                        final HostModelUtil.HostModelRegistrar hostModelRegistrar,
                                        final Resource modelControllerResource) {
        this.hostControllerEnvironment = hostControllerEnvironment;
        this.ignoredDomainResourceRegistry = ignoredDomainResourceRegistry;
        this.hostModelRegistrar = hostModelRegistrar;
        this.modelControllerResource = modelControllerResource;
    }

    /**
     * {@inheritDoc}
     */
    public void execute(OperationContext context, ModelNode operation) {

        if (!context.isBooting()) {
            throw MESSAGES.invocationNotAllowedAfterBoot(OPERATION_NAME);
        }

        final String hostName = operation.require(NAME).asString();

        // Set up the host model registrations
        final ManagementResourceRegistration rootRegistration = context.getResourceRegistrationForUpdate();
        hostModelRegistrar.registerHostModel(hostName, rootRegistration);

        final PathAddress hostAddress =  PathAddress.pathAddress(PathElement.pathElement(HOST, hostName));
        final Resource rootResource = context.createResource(hostAddress);
        final ModelNode model = rootResource.getModel();

        initCoreModel(model, hostControllerEnvironment);

        // Create the management resources
        Resource management = context.createResource(hostAddress.append(PathElement.pathElement(CORE_SERVICE, MANAGEMENT)));
        if (modelControllerResource != null) {
            management.registerChild(PathElement.pathElement(SERVICE, MANAGEMENT_OPERATIONS), modelControllerResource);
        }

        //Create the empty host-environment resource
        context.createResource(hostAddress.append(PathElement.pathElement(CORE_SERVICE, HOST_ENVIRONMENT)));

        // Wire in the platform mbean resources. We're bypassing the context.createResource API here because
        // we want to use our own resource type. But it's ok as the createResource calls above have taken the lock
        rootResource.registerChild(PlatformMBeanConstants.ROOT_PATH, new RootPlatformMBeanResource());
        // Wire in the ignored-resources resource
        Resource.ResourceEntry ignoredRoot = ignoredDomainResourceRegistry.getRootResource();
        rootResource.registerChild(ignoredRoot.getPathElement(), ignoredRoot);

        // Create the empty discovery options resource
        context.createResource(hostAddress.append(PathElement.pathElement(CORE_SERVICE, DISCOVERY_OPTIONS)));

        context.stepCompleted();
    }

    private static void initCoreModel(final ModelNode root, HostControllerEnvironment environment) {

        try {
            root.get(RELEASE_VERSION).set(Version.AS_VERSION);
            root.get(RELEASE_CODENAME).set(Version.AS_RELEASE_CODENAME);
        } catch (RuntimeException e) {
            if (HostModelRegistrationHandler.class.getClassLoader() instanceof ModuleClassLoader) {
                //The standalone tests can't get this info
                throw e;
            }
        }
        root.get(MANAGEMENT_MAJOR_VERSION).set(Version.MANAGEMENT_MAJOR_VERSION);
        root.get(MANAGEMENT_MINOR_VERSION).set(Version.MANAGEMENT_MINOR_VERSION);
        root.get(MANAGEMENT_MICRO_VERSION).set(Version.MANAGEMENT_MICRO_VERSION);

        // Community uses UNDEF values
        ModelNode nameNode = root.get(PRODUCT_NAME);
        ModelNode versionNode = root.get(PRODUCT_VERSION);

        if (environment != null) {
            String productName = environment.getProductConfig().getProductName();
            String productVersion = environment.getProductConfig().getProductVersion();

            if (productName != null) {
                nameNode.set(productName);
            }
            if (productVersion != null) {
                versionNode.set(productVersion);
            }
        }

    }

}
