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/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.hawkular.bus.broker.extension;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.hawkular.bus.broker.extension.log.MsgLogger;
import org.jboss.as.controller.AbstractAddStepHandler;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.ServiceVerificationHandler;
import org.jboss.as.controller.registry.Resource;
import org.jboss.as.network.SocketBinding;
import org.jboss.as.server.ServerEnvironment;
import org.jboss.as.server.ServerEnvironmentService;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.Property;
import org.jboss.logging.Logger;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceController.Mode;
import org.jboss.msc.service.ServiceName;

/**
 * Handler responsible for adding the subsystem resource to the model
 */
class BrokerSubsystemAdd extends AbstractAddStepHandler {

    static final BrokerSubsystemAdd INSTANCE = new BrokerSubsystemAdd();

    private final MsgLogger msglog = MsgLogger.LOGGER;
    private final Logger log = Logger.getLogger(BrokerSubsystemAdd.class);

    private BrokerSubsystemAdd() {
    }

    @Override
    protected void populateModel(OperationContext context, ModelNode operation, Resource resource)
            throws OperationFailedException {
        populateModel(operation, resource.getModel());
    }

    @Override
    protected void populateModel(ModelNode operation, ModelNode model) throws OperationFailedException {
        BrokerSubsystemDefinition.BROKER_ENABLED_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.BROKER_CONFIG_FILE_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.BROKER_NAME_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.BROKER_PERSISTENT_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.BROKER_USE_JMX_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.CUSTOM_CONFIG_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.CONNECTOR_NAME_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.CONNECTOR_PROTOCOL_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.SOCKET_BINDING_ATTRIBDEF.validateAndSet(operation, model);
        BrokerSubsystemDefinition.DISCOVERY_SOCKET_BINDING_ATTRIBDEF.validateAndSet(operation, model);
        log.debugf("Populating the Broker subsystem model: [%s=%s]", operation, model);
    }

    @Override
    protected void performRuntime(OperationContext context, ModelNode operation, ModelNode model,
            ServiceVerificationHandler verificationHandler, List> newControllers)
            throws OperationFailedException {

        boolean enabled = BrokerSubsystemDefinition.BROKER_ENABLED_ATTRIBDEF.resolveModelAttribute(context, model)
                .asBoolean(BrokerSubsystemExtension.BROKER_ENABLED_DEFAULT);

        if (!enabled) {
            msglog.infoBrokerNotEnabled();
            return;
        }

        String configFile = BrokerSubsystemDefinition.BROKER_CONFIG_FILE_ATTRIBDEF.resolveModelAttribute(context,
                model).asString();
        if (configFile == null || configFile.trim().isEmpty()) {
            configFile = BrokerSubsystemExtension.BROKER_CONFIG_FILE_DEFAULT;
        }

        msglog.infoBrokerEnabledWithConfigFile(configFile);

        // set up our runtime custom configuration properties that should be used instead of the out-of-box config
        Map customConfigProps = new HashMap();
        addCustomConfigProperty(context, model, customConfigProps, BrokerSubsystemDefinition.BROKER_NAME_ATTRIBDEF);
        addCustomConfigProperty(context, model, customConfigProps,
                BrokerSubsystemDefinition.BROKER_PERSISTENT_ATTRIBDEF);
        addCustomConfigProperty(context, model, customConfigProps, BrokerSubsystemDefinition.BROKER_USE_JMX_ATTRIBDEF);
        addCustomConfigProperty(context, model, customConfigProps, BrokerSubsystemDefinition.CONNECTOR_NAME_ATTRIBDEF);
        addCustomConfigProperty(context, model, customConfigProps,
                BrokerSubsystemDefinition.CONNECTOR_PROTOCOL_ATTRIBDEF);

        // allow the user to provide their own config props
        ModelNode customConfigNode = BrokerSubsystemDefinition.CUSTOM_CONFIG_ATTRIBDEF.resolveModelAttribute(context,
                model);
        if (customConfigNode != null && customConfigNode.isDefined()) {
            HashMap customConfig = new HashMap();
            List propList = customConfigNode.asPropertyList();
            for (Property prop : propList) {
                String name = prop.getName();
                String val = prop.getValue().asString();
                customConfig.put(name, val);
            }
            customConfigProps.putAll(customConfig);
        }

        // create our service
        BrokerService service = new BrokerService();
        service.setConfigurationFile(configFile);
        service.setCustomConfigurationProperties(customConfigProps);

        // install the service
        String binding = BrokerSubsystemDefinition.SOCKET_BINDING_ATTRIBDEF.resolveModelAttribute(context, model)
                .asString();
        String discoveryBinding = BrokerSubsystemDefinition.DISCOVERY_SOCKET_BINDING_ATTRIBDEF.resolveModelAttribute(
                context, model).asString();
        ServiceName name = BrokerService.SERVICE_NAME;
        ServiceController controller = context
                .getServiceTarget()
                .addService(name, service)
                .addDependency(ServerEnvironmentService.SERVICE_NAME, ServerEnvironment.class, service.envServiceValue)
                .addDependency(SocketBinding.JBOSS_BINDING_NAME.append(binding), SocketBinding.class,
                        service.connectorSocketBinding)
                .addDependency(SocketBinding.JBOSS_BINDING_NAME.append(discoveryBinding), SocketBinding.class,
                        service.discoverySocketBinding)
                .addListener(verificationHandler)
                .setInitialMode(Mode.ACTIVE)
                .install();
        newControllers.add(controller);
        return;
    }

    private void addCustomConfigProperty(OperationContext context, ModelNode model,
            Map customConfigProps, AttributeDefinition attribDef) throws OperationFailedException {
        addCustomConfigProperty(context, model, customConfigProps, attribDef, null);
    }

    private void addCustomConfigProperty(OperationContext context, ModelNode model,
            Map customConfigProps, AttributeDefinition attribDef, String customConfigPropName)
            throws OperationFailedException {
        ModelNode node = attribDef.resolveModelAttribute(context, model);
        if (node.isDefined()) {
            customConfigProps.put((customConfigPropName == null) ? attribDef.getName() : customConfigPropName,
                    node.asString());
        }
    }
}