package envoy.server.processors;

import java.io.IOException;

import envoy.data.IDGenerator;
import envoy.event.IDGeneratorRequest;

import envoy.server.data.*;
import envoy.server.net.ObjectWriteProxy;

/**
 * @author Kai S. K. Engelbart
 * @author Maximilian Käfer
 * @since Envoy Server Standalone v0.1-alpha
 */
public final class IDGeneratorRequestProcessor implements ObjectProcessor<IDGeneratorRequest> {

	private static final long ID_RANGE = 200;

	@Override
	public void process(IDGeneratorRequest input, long socketID, ObjectWriteProxy writeProxy)
		throws IOException {
		writeProxy.write(socketID, createIDGenerator());
	}

	/**
	 * @return a new IDGenerator
	 * @since Envoy Server Standalone v0.1-beta
	 */
	public static IDGenerator createIDGenerator() {
		return createIDGenerator(ID_RANGE);
	}

	/**
	 * @param range of IDs used by the new IDGenerator
	 * @return a new IDGenerator with a specific range of IDs
	 * @since Envoy Server Standalone v0.1-beta
	 */
	public static IDGenerator createIDGenerator(long range) {
		ConfigItem	currentID	=
			PersistenceManager.getInstance().getConfigItemByID("currentMessageId");
		IDGenerator	generator	= new IDGenerator(Integer.parseInt(currentID.getValue()), range);
		currentID.setValue(String.valueOf(Integer.parseInt(currentID.getValue()) + range));
		PersistenceManager.getInstance().updateConfigItem(currentID);
		return generator;
	}
}