/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2016, 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.jboss.as.server.deployment.scanner;

import static org.jboss.as.server.deployment.scanner.logging.DeploymentScannerLogger.ROOT_LOGGER;

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

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.ReloadRequiredWriteAttributeHandler;
import org.jboss.as.controller.OperationContext.Stage;
import org.jboss.as.controller.services.path.PathManager;
import org.jboss.dmr.ModelNode;

/**
 * @author wangc
 *
 */
public class WritePathAttributeHandler extends ReloadRequiredWriteAttributeHandler {

    private final PathManager pathManager;

    public WritePathAttributeHandler(PathManager pathManager) {
        super(DeploymentScannerDefinition.PATH);
        this.pathManager = pathManager;
    }

    @Override
    protected boolean applyUpdateToRuntime(OperationContext context, ModelNode operation, String attributeName,
            ModelNode resolvedValue, ModelNode currentValue, HandbackHolder<Void> voidHandback)
                    throws OperationFailedException {
        boolean reloadRequired = super.applyUpdateToRuntime(context, operation, attributeName, resolvedValue, currentValue,
                voidHandback);
        if (reloadRequired) {
            // The value actually changed so we need to add step to validate the path
            context.addStep(new OperationStepHandler() {
                @Override
                public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
                    final ModelNode model = context.readResource(PathAddress.EMPTY_ADDRESS).getModel();
                    final ModelNode relativeTo = DeploymentScannerDefinition.RELATIVE_TO.resolveModelAttribute(context, model);
                    Path fullPath;
                    if (relativeTo.isDefined()) {
                        final String fullPathName = pathManager.resolveRelativePathEntry(resolvedValue.asString(),
                                relativeTo.asString());
                        fullPath = Paths.get(fullPathName);
                    } else {
                        fullPath = Paths.get(resolvedValue.asString());
                    }

                    if (!Files.exists(fullPath)) {
                        ROOT_LOGGER.directoryIsNonexistent(fullPath.toString());
                    } else if (!Files.isDirectory(fullPath)) {
                        ROOT_LOGGER.isNotADirectory(fullPath.toString());
                    } else if (!Files.isReadable(fullPath)) {
                        ROOT_LOGGER.directoryIsNotReadable(fullPath.toString());
                    } else if (!Files.isWritable(fullPath)) {
                        ROOT_LOGGER.directoryIsNotWritable(fullPath.toString());
                    }
                }
            }, Stage.RUNTIME);
        }
        return reloadRequired;
    }
}