/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.jboss.as.jmx;

import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.ADD;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP_ADDR;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.SUBSYSTEM;

import java.util.List;

import javax.xml.stream.XMLStreamException;

import org.jboss.as.controller.AbstractAddStepHandler;
import org.jboss.as.controller.Extension;
import org.jboss.as.controller.ExtensionContext;
import org.jboss.as.controller.ModelVersion;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PathElement;
import org.jboss.as.controller.ReloadRequiredRemoveStepHandler;
import org.jboss.as.controller.ResourceBuilder;
import org.jboss.as.controller.SimpleAttributeDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.as.controller.SubsystemRegistration;
import org.jboss.as.controller.descriptions.NonResolvingResourceDescriptionResolver;
import org.jboss.as.controller.parsing.ExtensionParsingContext;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.staxmapper.XMLElementReader;
import org.jboss.staxmapper.XMLExtendedStreamReader;

/**
 * @author Tomaz Cerar (c) 2014 Red Hat Inc.
 */
class SubsystemWithChildrenExtension implements Extension {

    static final String NAMESPACE = "urn:jboss:mbean.model.test";

    private static final PathElement SUBSYSTEM_PATH = PathElement.pathElement(SUBSYSTEM, "test");

    private static final SimpleAttributeDefinition ATTR = new SimpleAttributeDefinitionBuilder("attr", ModelType.INT, true)
            .build();

    @Override
    public void initialize(ExtensionContext context) {

        final SubsystemRegistration subsystem = context.registerSubsystem("test", ModelVersion.create(1));

        ResourceBuilder builder = ResourceBuilder.Factory.create(SUBSYSTEM_PATH, NonResolvingResourceDescriptionResolver.INSTANCE)
                .setAddOperation(TestSubystemAdd.INSTANCE)
                .pushChild(getChildElement())
                .setAddOperation(TestChildAdd.INSTANCE)
                .setRemoveOperation(ReloadRequiredRemoveStepHandler.INSTANCE)
                .addReadOnlyAttribute(ATTR)
                .pop();

        subsystem.registerSubsystemModel(builder.build());
    }

    PathElement getChildElement() {
        return null;
    }

    @Override
    public void initializeParsers(ExtensionParsingContext context) {
        context.setSubsystemXmlMapping("test", NAMESPACE, new TestExtensionParser());
    }

    static class TestExtensionParser implements XMLElementReader<List<ModelNode>> {
        @Override
        public void readElement(XMLExtendedStreamReader reader, List<ModelNode> list) throws XMLStreamException {
            reader.next();
            ModelNode add = new ModelNode();
            add.get(OP).set(ADD);
            add.get(OP_ADDR).set(PathAddress.pathAddress(SUBSYSTEM_PATH).toModelNode());
            list.add(add);
        }
    }

    static class TestSubystemAdd extends AbstractAddStepHandler {
        static final TestSubystemAdd INSTANCE = new TestSubystemAdd();

        @Override
        protected void populateModel(ModelNode operation, ModelNode model) throws OperationFailedException {
        }
    }

    static class TestChildAdd extends AbstractAddStepHandler {
        static final TestChildAdd INSTANCE = new TestChildAdd();

        @Override
        protected void populateModel(ModelNode operation, ModelNode model) throws OperationFailedException {
            ATTR.validateAndSet(operation, model);
        }
    }
}
