/*
 * Copyright 2015 Red Hat, Inc.
 *
 * 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.jboss.as.ee.subsystem;

import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.NAME;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP_ADDR;
import static org.jboss.as.controller.parsing.ParseUtils.missingRequired;
import static org.jboss.as.controller.parsing.ParseUtils.requireNoAttributes;
import static org.jboss.as.controller.parsing.ParseUtils.requireNoContent;
import static org.jboss.as.controller.parsing.ParseUtils.requireNoNamespaceAttribute;
import static org.jboss.as.controller.parsing.ParseUtils.unexpectedAttribute;
import static org.jboss.as.controller.parsing.ParseUtils.unexpectedElement;

import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;

import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.operations.common.Util;
import org.jboss.as.ee.logging.EeLogger;
import org.jboss.dmr.ModelNode;
import org.jboss.staxmapper.XMLElementReader;
import org.jboss.staxmapper.XMLExtendedStreamReader;

/**
 */
class EESubsystemParser40 implements XMLStreamConstants, XMLElementReader<List<ModelNode>> {

    EESubsystemParser40() {

    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void readElement(XMLExtendedStreamReader reader, List<ModelNode> list) throws XMLStreamException {
        // EE subsystem doesn't have any attributes, so make sure that the xml doesn't have any
        requireNoAttributes(reader);
        final PathAddress subsystemPathAddress = PathAddress.pathAddress(EeExtension.PATH_SUBSYSTEM);
        final ModelNode eeSubSystem = Util.createAddOperation(subsystemPathAddress);
        // add the subsystem to the ModelNode(s)
        list.add(eeSubSystem);

        // elements
        final EnumSet<Element> encountered = EnumSet.noneOf(Element.class);
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            switch (Namespace.forUri(reader.getNamespaceURI())) {
                case EE_4_0: {
                    final Element element = Element.forName(reader.getLocalName());
                    if (!encountered.add(element)) {
                        throw unexpectedElement(reader);
                    }
                    readElement(reader, list, subsystemPathAddress, eeSubSystem);
                    break;
                }
                default: {
                    throw unexpectedElement(reader);
                }
            }
        }
    }

    protected void readElement(final XMLExtendedStreamReader reader, final List<ModelNode> list, final PathAddress subsystemPathAddress, final ModelNode eeSubSystem) throws XMLStreamException {
        final Element element = Element.forName(reader.getLocalName());
        switch (element) {
            case GLOBAL_MODULES: {
                final ModelNode model = parseGlobalModules(reader);
                eeSubSystem.get(GlobalModulesDefinition.GLOBAL_MODULES).set(model);
                break;
            }
            case EAR_SUBDEPLOYMENTS_ISOLATED: {
                final String earSubDeploymentsIsolated = parseEarSubDeploymentsIsolatedElement(reader);
                // set the ear subdeployment isolation on the subsystem operation
                EeSubsystemRootResource.EAR_SUBDEPLOYMENTS_ISOLATED.parseAndSetParameter(earSubDeploymentsIsolated, eeSubSystem, reader);
                break;
            }
            case SPEC_DESCRIPTOR_PROPERTY_REPLACEMENT: {
                final String enabled = parseSpecDescriptorPropertyReplacement(reader);
                EeSubsystemRootResource.SPEC_DESCRIPTOR_PROPERTY_REPLACEMENT.parseAndSetParameter(enabled, eeSubSystem, reader);
                break;
            }
            case JBOSS_DESCRIPTOR_PROPERTY_REPLACEMENT: {
                final String enabled = parseJBossDescriptorPropertyReplacement(reader);
                EeSubsystemRootResource.JBOSS_DESCRIPTOR_PROPERTY_REPLACEMENT.parseAndSetParameter(enabled, eeSubSystem, reader);
                break;
            }
            case ANNOTATION_PROPERTY_REPLACEMENT: {
                final String enabled = parseEJBAnnotationPropertyReplacement(reader);
                EeSubsystemRootResource.ANNOTATION_PROPERTY_REPLACEMENT.parseAndSetParameter(enabled, eeSubSystem, reader);
                break;
            }
            case CONCURRENT: {
                parseConcurrent(reader, list, subsystemPathAddress);
                break;
            }
            case DEFAULT_BINDINGS: {
                parseDefaultBindings(reader, list, subsystemPathAddress);
                break;
            }
            default: {
                throw unexpectedElement(reader);
            }
        }
    }

    static ModelNode parseGlobalModules(XMLExtendedStreamReader reader) throws XMLStreamException {

        ModelNode globalModules = new ModelNode();

        requireNoAttributes(reader);

        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            switch (Element.forName(reader.getLocalName())) {
                case MODULE: {
                    final ModelNode module = new ModelNode();
                    final int count = reader.getAttributeCount();
                    String name = null;
                    String slot = null;
                    String annotations = null;
                    String metaInf = null;
                    String services = null;
                    for (int i = 0; i < count; i++) {
                        requireNoNamespaceAttribute(reader, i);
                        final String value = reader.getAttributeValue(i);
                        final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
                        switch (attribute) {
                            case NAME:
                                if (name != null) {
                                    throw unexpectedAttribute(reader, i);
                                }
                                name = value;
                                GlobalModulesDefinition.NAME_AD.parseAndSetParameter(name, module, reader);
                                break;
                            case SLOT:
                                if (slot != null) {
                                    throw unexpectedAttribute(reader, i);
                                }
                                slot = value;
                                GlobalModulesDefinition.SLOT_AD.parseAndSetParameter(slot, module, reader);
                                break;
                            case ANNOTATIONS:
                                if (annotations != null) {
                                    throw unexpectedAttribute(reader, i);
                                }
                                annotations = value;
                                GlobalModulesDefinition.ANNOTATIONS_AD.parseAndSetParameter(annotations, module, reader);
                                break;

                            case SERVICES:
                                if (services != null) {
                                    throw unexpectedAttribute(reader, i);
                                }
                                services = value;
                                GlobalModulesDefinition.SERVICES_AD.parseAndSetParameter(services, module, reader);
                                break;

                            case META_INF:
                                if (metaInf != null) {
                                    throw unexpectedAttribute(reader, i);
                                }
                                metaInf = value;
                                GlobalModulesDefinition.META_INF_AD.parseAndSetParameter(metaInf, module, reader);
                                break;
                            default:
                                throw unexpectedAttribute(reader, i);
                        }
                    }
                    if (name == null) {
                        throw missingRequired(reader, Collections.singleton(NAME));
                    }

                    globalModules.add(module);

                    requireNoContent(reader);
                    break;
                }
                default: {
                    throw unexpectedElement(reader);
                }
            }
        }
        return globalModules;
    }

    static String parseEarSubDeploymentsIsolatedElement(XMLExtendedStreamReader reader) throws XMLStreamException {

        // we don't expect any attributes for this element.
        requireNoAttributes(reader);

        final String value = reader.getElementText();
        if (value == null || value.trim().isEmpty()) {
            throw EeLogger.ROOT_LOGGER.invalidValue(value, Element.EAR_SUBDEPLOYMENTS_ISOLATED.getLocalName(), reader.getLocation());
        }
        return value.trim();
    }


    static String parseSpecDescriptorPropertyReplacement(XMLExtendedStreamReader reader) throws XMLStreamException {

        // we don't expect any attributes for this element.
        requireNoAttributes(reader);

        final String value = reader.getElementText();
        if (value == null || value.trim().isEmpty()) {
            throw EeLogger.ROOT_LOGGER.invalidValue(value, Element.SPEC_DESCRIPTOR_PROPERTY_REPLACEMENT.getLocalName(), reader.getLocation());
        }
        return value.trim();
    }


    static String parseJBossDescriptorPropertyReplacement(XMLExtendedStreamReader reader) throws XMLStreamException {

        // we don't expect any attributes for this element.
        requireNoAttributes(reader);

        final String value = reader.getElementText();
        if (value == null || value.trim().isEmpty()) {
            throw EeLogger.ROOT_LOGGER.invalidValue(value, Element.JBOSS_DESCRIPTOR_PROPERTY_REPLACEMENT.getLocalName(), reader.getLocation());
        }
        return value.trim();
    }

    static String parseEJBAnnotationPropertyReplacement(XMLExtendedStreamReader reader) throws XMLStreamException {
        // we don't expect any attributes for this element.
        requireNoAttributes(reader);

        final String value = reader.getElementText();
        return value.trim();
    }

    static void parseConcurrent(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        requireNoAttributes(reader);
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            final Element element = Element.forName(reader.getLocalName());
            switch (element) {
                case CONTEXT_SERVICES: {
                    parseContextServices(reader, operations, subsystemPathAddress);
                    break;
                }
                case MANAGED_THREAD_FACTORIES: {
                    parseManagedThreadFactories(reader, operations, subsystemPathAddress);
                    break;
                }
                case MANAGED_EXECUTOR_SERVICES: {
                    parseManagedExecutorServices(reader, operations, subsystemPathAddress);
                    break;
                }
                case MANAGED_SCHEDULED_EXECUTOR_SERVICES: {
                    parseManagedScheduledExecutorServices(reader, operations, subsystemPathAddress);
                    break;
                }
                default: {
                    throw unexpectedElement(reader);
                }
            }
        }
    }

    static void parseContextServices(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        requireNoAttributes(reader);
        boolean empty = true;
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            switch (Element.forName(reader.getLocalName())) {
                case CONTEXT_SERVICE: {
                    empty = false;
                    parseContextService(reader, operations, subsystemPathAddress);
                    break;
                }
                default: {
                    throw unexpectedElement(reader);
                }
            }
        }
        if (empty) {
            throw missingRequired(reader, EnumSet.of(Element.CONTEXT_SERVICE));
        }
    }

    static void parseContextService(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        final ModelNode addOperation = Util.createAddOperation();
        final int count = reader.getAttributeCount();
        String name = null;
        final EnumSet<Attribute> required = EnumSet.of(Attribute.NAME, Attribute.JNDI_NAME);
        for (int i = 0; i < count; i++) {
            requireNoNamespaceAttribute(reader, i);
            final String value = reader.getAttributeValue(i);
            final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
            required.remove(attribute);
            switch (attribute) {
                case NAME:
                    name = value.trim();
                    break;
                case JNDI_NAME:
                    ContextServiceResourceDefinition.JNDI_NAME_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case USE_TRANSACTION_SETUP_PROVIDER:
                    ContextServiceResourceDefinition.USE_TRANSACTION_SETUP_PROVIDER_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                default:
                    throw unexpectedAttribute(reader, i);
            }
        }
        if (!required.isEmpty()) {
            throw missingRequired(reader, required);
        }
        requireNoContent(reader);
        final PathAddress address = subsystemPathAddress.append(EESubsystemModel.CONTEXT_SERVICE, name);
        addOperation.get(OP_ADDR).set(address.toModelNode());
        operations.add(addOperation);
    }

    static void parseManagedThreadFactories(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        requireNoAttributes(reader);
        boolean empty = true;
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            switch (Element.forName(reader.getLocalName())) {
                case MANAGED_THREAD_FACTORY: {
                    empty = false;
                    parseManagedThreadFactory(reader, operations, subsystemPathAddress);
                    break;
                }
                default: {
                    throw unexpectedElement(reader);
                }
            }
        }
        if (empty) {
            throw missingRequired(reader, EnumSet.of(Element.MANAGED_THREAD_FACTORY));
        }
    }

    static void parseManagedThreadFactory(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        final ModelNode addOperation = Util.createAddOperation();
        final int count = reader.getAttributeCount();
        String name = null;
        final EnumSet<Attribute> required = EnumSet.of(Attribute.NAME, Attribute.JNDI_NAME);
        for (int i = 0; i < count; i++) {
            requireNoNamespaceAttribute(reader, i);
            final String value = reader.getAttributeValue(i);
            final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
            required.remove(attribute);
            switch (attribute) {
                case NAME:
                    name = value.trim();
                    break;
                case JNDI_NAME:
                    ManagedThreadFactoryResourceDefinition.JNDI_NAME_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case CONTEXT_SERVICE:
                    ManagedThreadFactoryResourceDefinition.CONTEXT_SERVICE_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case PRIORITY:
                    ManagedThreadFactoryResourceDefinition.PRIORITY_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                default:
                    throw unexpectedAttribute(reader, i);
            }
        }
        if (!required.isEmpty()) {
            throw missingRequired(reader, required);
        }
        requireNoContent(reader);
        final PathAddress address = subsystemPathAddress.append(EESubsystemModel.MANAGED_THREAD_FACTORY, name);
        addOperation.get(OP_ADDR).set(address.toModelNode());
        operations.add(addOperation);
    }

    static void parseManagedExecutorServices(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        requireNoAttributes(reader);
        boolean empty = true;
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            switch (Element.forName(reader.getLocalName())) {
                case MANAGED_EXECUTOR_SERVICE: {
                    empty = false;
                    parseManagedExecutorService(reader, operations, subsystemPathAddress);
                    break;
                }
                default: {
                    throw unexpectedElement(reader);
                }
            }
        }
        if (empty) {
            throw missingRequired(reader, EnumSet.of(Element.MANAGED_EXECUTOR_SERVICE));
        }
    }

    static void parseManagedExecutorService(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        final ModelNode addOperation = Util.createAddOperation();
        final int count = reader.getAttributeCount();
        String name = null;
        final EnumSet<Attribute> required = EnumSet.of(Attribute.NAME, Attribute.JNDI_NAME);
        for (int i = 0; i < count; i++) {
            requireNoNamespaceAttribute(reader, i);
            final String value = reader.getAttributeValue(i);
            final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
            required.remove(attribute);
            switch (attribute) {
                case NAME:
                    name = value.trim();
                    break;
                case JNDI_NAME:
                    ManagedExecutorServiceResourceDefinition.JNDI_NAME_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case CONTEXT_SERVICE:
                    ManagedExecutorServiceResourceDefinition.CONTEXT_SERVICE_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case THREAD_FACTORY:
                    ManagedScheduledExecutorServiceResourceDefinition.THREAD_FACTORY_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case HUNG_TASK_THRESHOLD:
                    ManagedExecutorServiceResourceDefinition.HUNG_TASK_THRESHOLD_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case LONG_RUNNING_TASKS:
                    ManagedExecutorServiceResourceDefinition.LONG_RUNNING_TASKS_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case CORE_THREADS:
                    ManagedExecutorServiceResourceDefinition.CORE_THREADS_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case MAX_THREADS:
                    ManagedExecutorServiceResourceDefinition.MAX_THREADS_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case KEEPALIVE_TIME:
                    ManagedExecutorServiceResourceDefinition.KEEPALIVE_TIME_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case QUEUE_LENGTH:
                    ManagedExecutorServiceResourceDefinition.QUEUE_LENGTH_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case REJECT_POLICY:
                    ManagedExecutorServiceResourceDefinition.REJECT_POLICY_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                default:
                    throw unexpectedAttribute(reader, i);
            }
        }
        if (!required.isEmpty()) {
            throw missingRequired(reader, required);
        }
        requireNoContent(reader);
        final PathAddress address = subsystemPathAddress.append(EESubsystemModel.MANAGED_EXECUTOR_SERVICE, name);
        addOperation.get(OP_ADDR).set(address.toModelNode());
        operations.add(addOperation);
    }

    static void parseManagedScheduledExecutorServices(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        requireNoAttributes(reader);
        boolean empty = true;
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            switch (Element.forName(reader.getLocalName())) {
                case MANAGED_SCHEDULED_EXECUTOR_SERVICE: {
                    empty = false;
                    parseManagedScheduledExecutorService(reader, operations, subsystemPathAddress);
                    break;
                }
                default: {
                    throw unexpectedElement(reader);
                }
            }
        }
        if (empty) {
            throw missingRequired(reader, EnumSet.of(Element.MANAGED_SCHEDULED_EXECUTOR_SERVICE));
        }
    }

    static void parseManagedScheduledExecutorService(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        final ModelNode addOperation = Util.createAddOperation();
        final int count = reader.getAttributeCount();
        String name = null;
        final EnumSet<Attribute> required = EnumSet.of(Attribute.NAME, Attribute.JNDI_NAME);
        for (int i = 0; i < count; i++) {
            requireNoNamespaceAttribute(reader, i);
            final String value = reader.getAttributeValue(i);
            final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
            required.remove(attribute);
            switch (attribute) {
                case NAME:
                    name = value.trim();
                    break;
                case JNDI_NAME:
                    ManagedScheduledExecutorServiceResourceDefinition.JNDI_NAME_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case CONTEXT_SERVICE:
                    ManagedScheduledExecutorServiceResourceDefinition.CONTEXT_SERVICE_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case THREAD_FACTORY:
                    ManagedScheduledExecutorServiceResourceDefinition.THREAD_FACTORY_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case HUNG_TASK_THRESHOLD:
                    ManagedScheduledExecutorServiceResourceDefinition.HUNG_TASK_THRESHOLD_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case LONG_RUNNING_TASKS:
                    ManagedScheduledExecutorServiceResourceDefinition.LONG_RUNNING_TASKS_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case CORE_THREADS:
                    ManagedScheduledExecutorServiceResourceDefinition.CORE_THREADS_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case KEEPALIVE_TIME:
                    ManagedScheduledExecutorServiceResourceDefinition.KEEPALIVE_TIME_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case REJECT_POLICY:
                    ManagedScheduledExecutorServiceResourceDefinition.REJECT_POLICY_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                default:
                    throw unexpectedAttribute(reader, i);
            }
        }
        if (!required.isEmpty()) {
            throw missingRequired(reader, required);
        }
        requireNoContent(reader);
        final PathAddress address = subsystemPathAddress.append(EESubsystemModel.MANAGED_SCHEDULED_EXECUTOR_SERVICE, name);
        addOperation.get(OP_ADDR).set(address.toModelNode());
        operations.add(addOperation);
    }

    static void parseDefaultBindings(XMLExtendedStreamReader reader, List<ModelNode> operations, PathAddress subsystemPathAddress) throws XMLStreamException {
        final ModelNode addOperation = Util.createAddOperation();
        final int count = reader.getAttributeCount();
        for (int i = 0; i < count; i++) {
            requireNoNamespaceAttribute(reader, i);
            final String value = reader.getAttributeValue(i);
            final Attribute attribute = Attribute.forName(reader.getAttributeLocalName(i));
            switch (attribute) {
                case CONTEXT_SERVICE:
                    DefaultBindingsResourceDefinition.CONTEXT_SERVICE_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case DATASOURCE:
                    DefaultBindingsResourceDefinition.DATASOURCE_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case JMS_CONNECTION_FACTORY:
                    DefaultBindingsResourceDefinition.JMS_CONNECTION_FACTORY_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case MANAGED_EXECUTOR_SERVICE:
                    DefaultBindingsResourceDefinition.MANAGED_EXECUTOR_SERVICE_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case MANAGED_SCHEDULED_EXECUTOR_SERVICE:
                    DefaultBindingsResourceDefinition.MANAGED_SCHEDULED_EXECUTOR_SERVICE_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                case MANAGED_THREAD_FACTORY:
                    DefaultBindingsResourceDefinition.MANAGED_THREAD_FACTORY_AD.parseAndSetParameter(value, addOperation, reader);
                    break;
                default:
                    throw unexpectedAttribute(reader, i);
            }
        }
        requireNoContent(reader);
        final PathAddress address = subsystemPathAddress.append(EESubsystemModel.DEFAULT_BINDINGS_PATH);
        addOperation.get(OP_ADDR).set(address.toModelNode());
        operations.add(addOperation);
    }
}
