/*
 * Copyright 2009-2012 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.asterix.installer.command;

import org.kohsuke.args4j.Option;

import edu.uci.ics.asterix.event.schema.pattern.Patterns;
import edu.uci.ics.asterix.installer.driver.InstallerDriver;
import edu.uci.ics.asterix.installer.driver.InstallerUtil;
import edu.uci.ics.asterix.installer.events.PatternCreator;
import edu.uci.ics.asterix.installer.model.AsterixInstance;
import edu.uci.ics.asterix.installer.model.AsterixInstance.State;
import edu.uci.ics.asterix.installer.service.ServiceProvider;

public class DeleteCommand extends AbstractCommand {

	@Override
	protected void execCommand() throws Exception {
		InstallerDriver.initConfig();
		String asterixInstanceName = ((DeleteConfig) config).name;
		AsterixInstance instance = InstallerUtil.validateAsterixInstanceExists(
				asterixInstanceName, State.INACTIVE);
		PatternCreator pc = new PatternCreator();
		Patterns patterns = pc.createDeleteInstancePattern(instance);
		InstallerUtil.getEventrixClient(instance.getCluster()).submit(patterns);

		patterns = pc.createRemoveAsterixWorkingDirPattern(instance);
		InstallerUtil.getEventrixClient(instance.getCluster()).submit(patterns);
		ServiceProvider.INSTANCE.getLookupService().removeAsterixInstance(
				asterixInstanceName);
		LOGGER.info("Deleted Asterix instance: " + asterixInstanceName);
	}

	@Override
	protected CommandConfig getCommandConfig() {
		return new DeleteConfig();
	}

	@Override
	protected String getUsageDescription() {
		return "\nPermanently deletes an ASTERIX instance." + "\n"
				+ "The instance must be in the INACTIVE state."
				+ "\n\nAvailable arguments/options"
				+ "\n-n name of the ASTERIX instance.";
	}

}

class DeleteConfig extends AbstractCommandConfig {

	@Option(name = "-n", required = true, usage = "Name of Asterix Instance")
	public String name;

}