/*
 * JBoss, Home of Professional Open Source.
 *
 * Copyright 2019 Red Hat, Inc., and individual 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.jboss.as.logging;

import static org.jboss.as.controller.parsing.ParseUtils.duplicateNamedElement;
import static org.jboss.as.controller.parsing.ParseUtils.missingRequired;
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 static org.jboss.as.logging.CommonAttributes.LOGGING_PROFILE;

import java.util.ArrayList;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.xml.stream.XMLStreamException;

import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.operations.common.Util;
import org.jboss.as.controller.parsing.ParseUtils;
import org.jboss.as.logging.filters.FilterResourceDefinition;
import org.jboss.dmr.ModelNode;
import org.jboss.staxmapper.XMLExtendedStreamReader;

/**
 * Subsystem parser for 8.0 of the logging subsystem.
 *
 * @author <a href="mailto:jperkins@redhat.com">James R. Perkins</a>
 */
class LoggingSubsystemParser_8_0 extends LoggingSubsystemParser_7_0 {

    @Override
    public void readElement(final XMLExtendedStreamReader reader, final List<ModelNode> operations) throws XMLStreamException {
        // No attributes
        ParseUtils.requireNoAttributes(reader);

        // Subsystem add operation
        final ModelNode subsystemAddOp = Util.createAddOperation(SUBSYSTEM_ADDRESS);
        operations.add(subsystemAddOp);

        final List<ModelNode> loggerOperations = new ArrayList<>();
        final List<ModelNode> asyncHandlerOperations = new ArrayList<>();
        final List<ModelNode> handlerOperations = new ArrayList<>();
        final List<ModelNode> formatterOperations = new ArrayList<>();
        final List<ModelNode> filterOperations = new ArrayList<>();

        // Elements
        final Set<String> loggerNames = new HashSet<>();
        final Set<String> handlerNames = new HashSet<>();
        final Set<String> formatterNames = new HashSet<>();
        final Set<String> filterNames = new HashSet<>();
        boolean rootDefined = false;
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            final Element element = Element.forName(reader.getLocalName());
            switch (element) {
                case ADD_LOGGING_API_DEPENDENCIES: {
                    final String value = ParseUtils.readStringAttributeElement(reader, Attribute.VALUE.getLocalName());
                    LoggingResourceDefinition.ADD_LOGGING_API_DEPENDENCIES.parseAndSetParameter(value, subsystemAddOp, reader);
                    break;
                }
                case USE_DEPLOYMENT_LOGGING_CONFIG: {
                    final String value = ParseUtils.readStringAttributeElement(reader, Attribute.VALUE.getLocalName());
                    LoggingResourceDefinition.USE_DEPLOYMENT_LOGGING_CONFIG.parseAndSetParameter(value, subsystemAddOp, reader);
                    break;
                }
                case LOGGER: {
                    parseLoggerElement(reader, SUBSYSTEM_ADDRESS, loggerOperations, loggerNames);
                    break;
                }
                case ROOT_LOGGER: {
                    if (rootDefined) {
                        throw unexpectedElement(reader);
                    }
                    rootDefined = true;
                    parseRootLoggerElement(reader, SUBSYSTEM_ADDRESS, loggerOperations);
                    break;
                }
                case CONSOLE_HANDLER: {
                    parseConsoleHandlerElement(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case FILE_HANDLER: {
                    parseFileHandlerElement(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case CUSTOM_HANDLER: {
                    parseCustomHandlerElement(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case PERIODIC_ROTATING_FILE_HANDLER: {
                    parsePeriodicRotatingFileHandlerElement(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case PERIODIC_SIZE_ROTATING_FILE_HANDLER: {
                    parsePeriodicSizeRotatingHandlerElement(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case SIZE_ROTATING_FILE_HANDLER: {
                    parseSizeRotatingHandlerElement(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case SOCKET_HANDLER: {
                    parseSocketHandlerElement(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case ASYNC_HANDLER: {
                    parseAsyncHandlerElement(reader, SUBSYSTEM_ADDRESS, asyncHandlerOperations, handlerNames);
                    break;
                }
                case SYSLOG_HANDLER: {
                    parseSyslogHandler(reader, SUBSYSTEM_ADDRESS, handlerOperations, handlerNames);
                    break;
                }
                case LOGGING_PROFILES: {
                    parseLoggingProfilesElement(reader, operations);
                }
                break;
                case FORMATTER: {
                    parseFormatter(reader, SUBSYSTEM_ADDRESS, formatterOperations, formatterNames);
                    break;
                }
                case FILTER: {
                    parseFilterElement(reader, SUBSYSTEM_ADDRESS, filterOperations, filterNames);
                    break;
                }
                default: {
                    reader.handleAny(operations);
                    break;
                }
            }
        }
        // Filters have no dependencies, but may be dependencies of handlers and/or loggers so they should be processed
        // first.
        operations.addAll(filterOperations);
        operations.addAll(formatterOperations);
        operations.addAll(handlerOperations);
        operations.addAll(asyncHandlerOperations);
        operations.addAll(loggerOperations);
    }

    @Override
    void parseLoggingProfileElement(final XMLExtendedStreamReader reader, final List<ModelNode> operations, final Set<String> profileNames) throws XMLStreamException {
        // Attributes
        String name = null;
        final EnumSet<Attribute> required = EnumSet.of(Attribute.NAME);
        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));
            required.remove(attribute);
            if (attribute == Attribute.NAME) {
                name = value;
            } else {
                throw unexpectedAttribute(reader, i);
            }
        }
        if (!required.isEmpty()) {
            throw missingRequired(reader, required);
        }
        if (!profileNames.add(name)) {
            throw duplicateNamedElement(reader, name);
        }
        // Setup the address
        final PathAddress profileAddress = SUBSYSTEM_ADDRESS.append(LOGGING_PROFILE, name);
        operations.add(Util.createAddOperation(profileAddress));

        final List<ModelNode> loggerOperations = new ArrayList<>();
        final List<ModelNode> asyncHandlerOperations = new ArrayList<>();
        final List<ModelNode> handlerOperations = new ArrayList<>();
        final List<ModelNode> formatterOperations = new ArrayList<>();
        final List<ModelNode> filterOperations = new ArrayList<>();

        final Set<String> loggerNames = new HashSet<>();
        final Set<String> handlerNames = new HashSet<>();
        final Set<String> formatterNames = new HashSet<>();
        final Set<String> filterNames = new HashSet<>();
        boolean gotRoot = false;
        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            final Element element = Element.forName(reader.getLocalName());
            switch (element) {
                case LOGGER: {
                    parseLoggerElement(reader, profileAddress, loggerOperations, loggerNames);
                    break;
                }
                case ROOT_LOGGER: {
                    if (gotRoot) {
                        throw unexpectedElement(reader);
                    }
                    gotRoot = true;
                    parseRootLoggerElement(reader, profileAddress, loggerOperations);
                    break;
                }
                case CONSOLE_HANDLER: {
                    parseConsoleHandlerElement(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case FILE_HANDLER: {
                    parseFileHandlerElement(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case CUSTOM_HANDLER: {
                    parseCustomHandlerElement(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case PERIODIC_ROTATING_FILE_HANDLER: {
                    parsePeriodicRotatingFileHandlerElement(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case PERIODIC_SIZE_ROTATING_FILE_HANDLER: {
                    parsePeriodicSizeRotatingHandlerElement(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case SIZE_ROTATING_FILE_HANDLER: {
                    parseSizeRotatingHandlerElement(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case SOCKET_HANDLER: {
                    parseSocketHandlerElement(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case ASYNC_HANDLER: {
                    parseAsyncHandlerElement(reader, profileAddress, asyncHandlerOperations, handlerNames);
                    break;
                }
                case SYSLOG_HANDLER: {
                    parseSyslogHandler(reader, profileAddress, handlerOperations, handlerNames);
                    break;
                }
                case FORMATTER: {
                    parseFormatter(reader, profileAddress, formatterOperations, formatterNames);
                    break;
                }
                case FILTER: {
                    parseFilterElement(reader, profileAddress, filterOperations, filterNames);
                    break;
                }
                default: {
                    reader.handleAny(operations);
                    break;
                }
            }
        }
        // Filters have no dependencies, but may be dependencies of handlers and/or loggers so they should be processed
        // first.
        operations.addAll(filterOperations);
        operations.addAll(formatterOperations);
        operations.addAll(handlerOperations);
        operations.addAll(asyncHandlerOperations);
        operations.addAll(loggerOperations);
    }

    @SuppressWarnings("WeakerAccess")
    void parseFilterElement(final XMLExtendedStreamReader reader, final PathAddress address, final List<ModelNode> operations, final Set<String> filterNames) throws XMLStreamException {
        final ModelNode operation = Util.createAddOperation();
        // Attributes
        String name = null;
        // Attributes
        final EnumSet<Attribute> required = EnumSet.of(Attribute.NAME, Attribute.CLASS, Attribute.MODULE);
        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));
            required.remove(attribute);
            switch (attribute) {
                case NAME: {
                    name = value;
                    break;
                }
                case CLASS: {
                    CommonAttributes.CLASS.parseAndSetParameter(value, operation, reader);
                    break;
                }
                case MODULE: {
                    CommonAttributes.MODULE.parseAndSetParameter(value, operation, reader);
                    break;
                }
                default:
                    throw unexpectedAttribute(reader, i);
            }
        }
        if (!required.isEmpty()) {
            throw missingRequired(reader, required);
        }
        if (!filterNames.add(name)) {
            throw duplicateNamedElement(reader, name);
        }

        // Setup the operation address
        addOperationAddress(operation, address, FilterResourceDefinition.NAME, name);


        final EnumSet<Element> encountered = EnumSet.noneOf(Element.class);
        while (reader.nextTag() != END_ELEMENT) {
            final Element element = Element.forName(reader.getLocalName());
            if (!encountered.add(element)) {
                throw unexpectedElement(reader);
            }
            if (element == Element.CONSTRUCTOR_PROPERTIES) {
                parsePropertyElement(operation, reader, FilterResourceDefinition.CONSTRUCTOR_PROPERTIES.getName());
            } else if (element == Element.PROPERTIES) {
                parsePropertyElement(operation, reader);
            } else {
                throw unexpectedElement(reader);
            }
        }
        operations.add(operation);
    }
}
