/*
 * 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.clustering.infinispan.subsystem;

import org.jboss.as.controller.*;
import org.jboss.as.controller.descriptions.ResourceDescriptionResolver;
import org.jboss.as.controller.registry.AttributeAccess;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.as.controller.registry.OperationEntry;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;

import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.ADD;

/**
 * Base class for loader resources which require common loader attributes only.
 *
 * @author William Burns (c) 2013 Red Hat Inc.
 */
public class BaseLoaderResource extends SimpleResourceDefinition {

    // attributes
    static final SimpleAttributeDefinition PRELOAD =
            new SimpleAttributeDefinitionBuilder(ModelKeys.PRELOAD, ModelType.BOOLEAN, true)
                    .setXmlName(Attribute.PRELOAD.getLocalName())
                    .setAllowExpression(true)
                    .setFlags(AttributeAccess.Flag.RESTART_ALL_SERVICES)
                    .setDefaultValue(new ModelNode().set(false))
                    .build();
    static final SimpleAttributeDefinition SHARED =
            new SimpleAttributeDefinitionBuilder(ModelKeys.SHARED, ModelType.BOOLEAN, true)
                    .setXmlName(Attribute.SHARED.getLocalName())
                    .setAllowExpression(true)
                    .setFlags(AttributeAccess.Flag.RESTART_ALL_SERVICES)
                    .setDefaultValue(new ModelNode().set(false))
                    .build();

    // only used for reader and writer as name is part of model hierarchy
    static final SimpleAttributeDefinition NAME =
            new SimpleAttributeDefinitionBuilder(ModelKeys.NAME, ModelType.STRING, true)
                    .setXmlName(Attribute.NAME.getLocalName())
                    .setAllowExpression(false)
                    .setFlags(AttributeAccess.Flag.RESTART_ALL_SERVICES)
                    .build();

    // used to pass in a list of properties to the loader add command
    static final AttributeDefinition PROPERTY = new SimpleAttributeDefinition(ModelKeys.PROPERTY, ModelType.PROPERTY, true);
    static final SimpleListAttributeDefinition PROPERTIES = SimpleListAttributeDefinition.Builder.of(ModelKeys.PROPERTIES, PROPERTY).
            setAllowNull(true).
            build();

    static final AttributeDefinition[] COMMON_LOADER_ATTRIBUTES = {SHARED, PRELOAD};
    static final AttributeDefinition[] COMMON_LOADER_PARAMETERS = {SHARED, PRELOAD, PROPERTIES};

    // operations
    private static final OperationDefinition CACHE_LOADER_ADD_DEFINITION = new SimpleOperationDefinitionBuilder(ADD, InfinispanExtension.getResourceDescriptionResolver(ModelKeys.LOADER))
        .setParameters(COMMON_LOADER_PARAMETERS)
        .build();

    private static final OperationDefinition RESET_LOADER_STATISTICS =
         new SimpleOperationDefinitionBuilder(
               "reset-loader-statistics",
               InfinispanExtension.getResourceDescriptionResolver(ModelKeys.LOADER)
         ).build();

    public BaseLoaderResource(PathElement pathElement, ResourceDescriptionResolver descriptionResolver, OperationStepHandler addHandler, OperationStepHandler removeHandler) {
        super(pathElement, descriptionResolver, addHandler, removeHandler);
    }

    @Override
    public void registerAttributes(ManagementResourceRegistration resourceRegistration) {
        super.registerAttributes(resourceRegistration);

        // check that we don't need a special handler here?
        final OperationStepHandler writeHandler = new ReloadRequiredWriteAttributeHandler(COMMON_LOADER_ATTRIBUTES);
        for (AttributeDefinition attr : COMMON_LOADER_ATTRIBUTES) {
            resourceRegistration.registerReadWriteAttribute(attr, null, writeHandler);
        }
    }

    // override the add operation to provide a custom definition (for the optional PROPERTIES parameter to add())
    @Override
    protected void registerAddOperation(final ManagementResourceRegistration registration, final OperationStepHandler handler, OperationEntry.Flag... flags) {
        registration.registerOperationHandler(CACHE_LOADER_ADD_DEFINITION, handler);
    }

    @Override
    public void registerChildren(ManagementResourceRegistration resourceRegistration) {
        super.registerChildren(resourceRegistration);
        resourceRegistration.registerSubModel(new LoaderPropertyResource());
    }

    @Override
    public void registerOperations(ManagementResourceRegistration resourceRegistration) {
        super.registerOperations(resourceRegistration);

       resourceRegistration.registerOperationHandler(BaseLoaderResource.RESET_LOADER_STATISTICS,
                                                     CacheCommands.ResetCacheLoaderStatisticsCommand.INSTANCE);
    }
}
