/*
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
 *
 * 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.switchyard.deploy.karaf;

import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.felix.gogo.commands.Argument;
import org.apache.felix.gogo.commands.Command;
import org.apache.felix.gogo.commands.Option;
import org.switchyard.admin.Application;
import org.switchyard.admin.Reference;
import org.switchyard.admin.SwitchYard;

/**
 * Shell command for list-references.
 */
@Command(scope = "switchyard", name = "list-references", description = "Returns a list of SwitchYard references used by application(s) deployed on the system.")
public class ListReferencesCommand extends AbstractSwitchYardServiceCommand {

    @Argument(index = 0, name = "application", description = "If specified, only service references for the named applications are returned.", multiValued = true)
    private List<String> _applicationNames;

    @Option(name = "--regex", description = "If specified, treat the application name(s) as a regular expression.")
    private boolean _regex;

    @Override
    protected Object doExecute(final SwitchYard switchYard) throws Exception {
        final Pattern pattern = compilePattern(_applicationNames, _regex);
        for (Application application : switchYard.getApplications()) {
            final String applicationName = String.valueOf(application.getName());
            final Matcher matcher = pattern.matcher(applicationName);
            if (matcher.find()) {
                System.out.println(String.format("  SwitchYard References: %s  ", applicationName));
                for (Reference reference : application.getReferences()) {
                    System.out.println(String.format("[ %s ]", reference.getName()));
                }
            }
        }
        return null;
    }

}