/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017, 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.jgroups.subsystem;

import java.util.function.UnaryOperator;

import org.jboss.as.clustering.controller.CapabilityReference;
import org.jboss.as.clustering.controller.ChildResourceDefinition;
import org.jboss.as.clustering.controller.CommonUnaryRequirement;
import org.jboss.as.clustering.controller.ResourceDescriptor;
import org.jboss.as.clustering.controller.ResourceServiceConfiguratorFactory;
import org.jboss.as.clustering.controller.SimpleResourceRegistrar;
import org.jboss.as.clustering.controller.SimpleResourceServiceHandler;
import org.jboss.as.clustering.controller.UnaryCapabilityNameResolver;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.capability.RuntimeCapability;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.as.controller.security.CredentialReference;
import org.jboss.as.controller.security.CredentialReferenceWriteAttributeHandler;
import org.jgroups.auth.AuthToken;
import org.wildfly.clustering.service.UnaryRequirement;

/**
 * @author Paul Ferraro
 */
public class AuthTokenResourceDefinition<T extends AuthToken> extends ChildResourceDefinition<ManagementResourceRegistration> {
    static final PathElement WILDCARD_PATH = pathElement(PathElement.WILDCARD_VALUE);

    static PathElement pathElement(String value) {
        return PathElement.pathElement("token", value);
    }

    enum Capability implements org.jboss.as.clustering.controller.Capability, UnaryRequirement {
        AUTH_TOKEN("org.wildfly.clustering.jgroups.auth-token", AuthToken.class),
        ;
        private final RuntimeCapability<Void> definition;

        Capability(String name, Class<?> type) {
            this.definition = RuntimeCapability.Builder.of(name, true).setServiceType(type).setAllowMultipleRegistrations(true).setDynamicNameMapper(UnaryCapabilityNameResolver.GRANDPARENT).build();
        }

        @Override
        public RuntimeCapability<?> getDefinition() {
            return this.definition;
        }
    }

    enum Attribute implements org.jboss.as.clustering.controller.Attribute {
        SHARED_SECRET(CredentialReference.getAttributeBuilder("shared-secret-reference", null, false, new CapabilityReference(Capability.AUTH_TOKEN, CommonUnaryRequirement.CREDENTIAL_STORE)).build()),
        ;
        private final AttributeDefinition definition;

        Attribute(AttributeDefinition definition) {
            this.definition = definition;
        }

        @Override
        public AttributeDefinition getDefinition() {
            return this.definition;
        }
    }

    protected final UnaryOperator<ResourceDescriptor> configurator;
    protected final ResourceServiceConfiguratorFactory serviceConfiguratorFactory;

    AuthTokenResourceDefinition(PathElement path, UnaryOperator<ResourceDescriptor> configurator, ResourceServiceConfiguratorFactory serviceConfiguratorFactory) {
        super(path, JGroupsExtension.SUBSYSTEM_RESOLVER.createChildResolver(path, WILDCARD_PATH));
        this.configurator = configurator;
        this.serviceConfiguratorFactory = serviceConfiguratorFactory;
    }

    @Override
    public ManagementResourceRegistration register(ManagementResourceRegistration parent) {
        ManagementResourceRegistration registration = parent.registerSubModel(this);
        ResourceDescriptor descriptor = this.configurator.apply(new ResourceDescriptor(this.getResourceDescriptionResolver()))
                .addAttribute(Attribute.SHARED_SECRET, new CredentialReferenceWriteAttributeHandler(Attribute.SHARED_SECRET.getDefinition()))
                .addCapabilities(Capability.class)
                ;
        new SimpleResourceRegistrar(descriptor, new SimpleResourceServiceHandler(this.serviceConfiguratorFactory)).register(registration);
        return registration;
    }
}
