/*
 * 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.wildfly.extension.picketlink.federation.model.idp;

import org.jboss.as.controller.AbstractWriteAttributeHandler;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.ExtensionContext;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.SimpleAttributeDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.as.controller.access.management.SensitiveTargetAccessConstraintDefinition;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.as.controller.registry.Resource;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceRegistry;
import org.wildfly.extension.picketlink.common.model.ModelElement;
import org.wildfly.extension.picketlink.federation.model.AbstractFederationResourceDefinition;
import org.wildfly.extension.picketlink.federation.model.handlers.HandlerResourceDefinition;
import org.wildfly.extension.picketlink.federation.service.IdentityProviderService;

import java.util.List;

import static org.jboss.as.controller.PathAddress.EMPTY_ADDRESS;

/**
 * @author <a href="mailto:psilva@redhat.com">Pedro Silva</a>
 * @since Mar 16, 2012
 */
public class IdentityProviderResourceDefinition extends AbstractFederationResourceDefinition {

    public static final SimpleAttributeDefinition URL = new SimpleAttributeDefinitionBuilder(ModelElement.COMMON_URL.getName(), ModelType.STRING, false)
        .setAllowExpression(true)
        .build();
    public static final SimpleAttributeDefinition SECURITY_DOMAIN = new SimpleAttributeDefinitionBuilder(ModelElement.COMMON_SECURITY_DOMAIN.getName(), ModelType.STRING, true)
        .setAccessConstraints(SensitiveTargetAccessConstraintDefinition.SECURITY_DOMAIN_REF)
        .build();
    public static final SimpleAttributeDefinition ENCRYPT = new SimpleAttributeDefinitionBuilder(ModelElement.IDENTITY_PROVIDER_ENCRYPT.getName(), ModelType.BOOLEAN, true)
        .setDefaultValue(new ModelNode().set(false))
        .setAllowExpression(true)
        .build();
    public static final SimpleAttributeDefinition SUPPORT_SIGNATURES = new SimpleAttributeDefinitionBuilder(ModelElement.COMMON_SUPPORTS_SIGNATURES.getName(), ModelType.BOOLEAN, true)
        .setDefaultValue(new ModelNode().set(false))
        .setAllowExpression(true)
        .build();
    public static final SimpleAttributeDefinition STRICT_POST_BINDING = new SimpleAttributeDefinitionBuilder(ModelElement.COMMON_STRICT_POST_BINDING.getName(), ModelType.BOOLEAN, true)
        .setDefaultValue(new ModelNode(true))
        .setAllowExpression(true)
        .build();
    public static final SimpleAttributeDefinition EXTERNAL = new SimpleAttributeDefinitionBuilder(ModelElement.IDENTITY_PROVIDER_EXTERNAL.getName(), ModelType.BOOLEAN, true)
        .setDefaultValue(new ModelNode(false))
        .setAllowExpression(true)
        .build();
    public static final SimpleAttributeDefinition SUPPORT_METADATA = new SimpleAttributeDefinitionBuilder(ModelElement.COMMON_SUPPORT_METADATA.getName(), ModelType.BOOLEAN, true)
        .setDefaultValue(new ModelNode(false))
        .setAllowExpression(true)
        .build();
    public static final SimpleAttributeDefinition SSL_AUTHENTICATION = new SimpleAttributeDefinitionBuilder(ModelElement.IDENTITY_PROVIDER_SSL_AUTHENTICATION.getName(), ModelType.BOOLEAN, true)
        .setDefaultValue(new ModelNode(false))
        .setAllowExpression(true)
        .build();
    public static final SimpleAttributeDefinition[] ATTRIBUTE_DEFINITIONS = new SimpleAttributeDefinition[]{URL,
        SECURITY_DOMAIN,
        EXTERNAL,
        ENCRYPT,
        SUPPORT_SIGNATURES,
        STRICT_POST_BINDING,
        SSL_AUTHENTICATION,
        SUPPORT_METADATA};

    private final ExtensionContext extensionContext;

    public IdentityProviderResourceDefinition(ExtensionContext extensionContext) {
        super(ModelElement.IDENTITY_PROVIDER, IdentityProviderAddHandler.INSTANCE, IdentityProviderRemoveHandler.INSTANCE, ATTRIBUTE_DEFINITIONS);
        this.extensionContext = extensionContext;
    }

    @Override
    public void registerChildren(ManagementResourceRegistration resourceRegistration) {
        addChildResourceDefinition(TrustDomainResourceDefinition.INSTANCE, resourceRegistration);
        addChildResourceDefinition(HandlerResourceDefinition.INSTANCE, resourceRegistration);
        addChildResourceDefinition(RoleGeneratorResourceDefinition.INSTANCE, resourceRegistration);
        addChildResourceDefinition(AttributeManagerResourceDefinition.INSTANCE, resourceRegistration);
    }

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

        if (this.extensionContext.isRuntimeOnlyRegistrationValid()) {
            for (final SimpleAttributeDefinition def : IdentityProviderMetricsOperationHandler.ATTRIBUTES) {
                resourceRegistration.registerMetric(def, IdentityProviderMetricsOperationHandler.INSTANCE);
            }
        }
    }

    @Override
    protected OperationStepHandler createAttributeWriterHandler() {
        List<SimpleAttributeDefinition> attributes = getAttributes();
        return new AbstractWriteAttributeHandler(attributes.toArray(new AttributeDefinition[attributes.size()])) {
            @Override
            public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
                context.addStep(new IdentityProviderValidationStepHandler(), OperationContext.Stage.MODEL);
                super.execute(context, operation);
            }

            @Override
            protected boolean applyUpdateToRuntime(OperationContext context, ModelNode operation, String attributeName, ModelNode resolvedValue, ModelNode currentValue, HandbackHolder handbackHolder) throws OperationFailedException {
                PathAddress pathAddress = PathAddress.pathAddress(operation.get(ModelDescriptionConstants.OP_ADDR));

                updateConfiguration(context, pathAddress, false);

                return false;
            }

            @Override
            protected void revertUpdateToRuntime(OperationContext context, ModelNode operation, String attributeName, ModelNode valueToRestore, ModelNode valueToRevert, Object handback) throws OperationFailedException {
                PathAddress pathAddress = PathAddress.pathAddress(operation.get(ModelDescriptionConstants.OP_ADDR));
                updateConfiguration(context, pathAddress, true);
            }

            private void updateConfiguration(OperationContext context, PathAddress pathAddress, boolean rollback) throws OperationFailedException {
                String alias = pathAddress.getLastElement().getValue();
                ServiceRegistry serviceRegistry = context.getServiceRegistry(false);
                ServiceController<IdentityProviderService> serviceController =
                        (ServiceController<IdentityProviderService>) serviceRegistry.getService(IdentityProviderService.createServiceName(alias));

                if (serviceController != null) {
                    IdentityProviderService service = serviceController.getValue();
                    ModelNode identityProviderNode;

                    if (!rollback) {
                        identityProviderNode = context.readResource(EMPTY_ADDRESS, false).getModel();
                    } else {
                        Resource rc = context.getOriginalRootResource().navigate(pathAddress);
                        identityProviderNode = rc.getModel();
                    }

                    service.setConfiguration(IdentityProviderAddHandler.toIDPConfig(context, identityProviderNode, alias));
                }
            }
        };
    }
}