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/*
 *  streams library
 *
 *  Copyright (C) 2011-2014 by Christian Bockermann, Hendrik Blom
 * 
 *  streams is a library, API and runtime environment for processing high
 *  volume data streams. It is composed of three submodules "stream-api",
 *  "stream-core" and "stream-runtime".
 *
 *  The streams library (and its submodules) is free software: you can 
 *  redistribute it and/or modify it under the terms of the 
 *  GNU Affero General Public License as published by the Free Software 
 *  Foundation, either version 3 of the License, or (at your option) any 
 *  later version.
 *
 *  The stream.ai library (and its submodules) 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package stream.shell;

import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import stream.DebugShell;
import stream.runtime.rpc.ContainerAnnouncement;
import stream.runtime.rpc.Discovery;
import stream.runtime.rpc.RMIClient;
import stream.service.NamingService;
import stream.service.ServiceInfo;

/**
 * @author chris
 * 
 */
public class Discover extends Command {

	static Logger log = LoggerFactory.getLogger(Discover.class);

	Discovery discovery;

	/**
	 * @param shell
	 */
	public Discover(DebugShell shell) throws Exception {
		super(shell);
		this.discovery = new Discovery();
	}

	/**
	 * @see stream.shell.Command#execute(java.lang.String[])
	 */
	@Override
	public String execute(String[] args) {

		println("\nContainer:\n----------\n");

		log.info("Running discovery.discover()");

		try {
			discovery.discover();
			int id = 1;
			for (String key : discovery.getAnnouncements().keySet()) {
				ContainerAnnouncement ref = discovery.getAnnouncements().get(
						key);

				NamingService remote;

				log.info("Adding RMI connection for container {}", ref);
				if (shell.getNamingService().getContainer(key) != null) {
					log.info("Container already known: {}", shell
							.getNamingService().getContainer(key));
					remote = shell.getNamingService().getContainer(key);
				} else {
					remote = new RMIClient(ref.getHost(), ref.getPort());
					shell.getNamingService().addContainer(key, remote);
				}

				println("   #" + id + "  " + key + "  ["
						+ shell.getNamingService().getContainer(key) + "]");
				shell.set("#" + id, key);
				id++;
				Map infos = remote.list();
				for (String name : infos.keySet()) {
					if (!name.startsWith("//" + key + "/.")) {
						ServiceInfo info = infos.get(name);
						StringBuffer services = new StringBuffer("[");
						for (int i = 0; i < info.getServices().length; i++) {
							services.append(info.getServices()[i]
									.getCanonicalName());
							if (i + 1 < info.getServices().length)
								services.append(", ");
						}
						services.append("]");

						println("     + " + name + "    " + services.toString());
					}
				}
			}
			println("");
		} catch (Exception e) {
			println("Error: " + e.getMessage());
			e.printStackTrace();
		}

		/*
		 * Map list = discovery.getContainers(); for (String key :
		 * list.keySet()) { println("    " + key + "  (" + new
		 * Date(list.get(key)) + ")\n");
		 * 
		 * }
		 */
		return "";
	}
}