import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.LogManager;

import node.Node;

public class Main {

	public static Map<String, Node> nodes = new HashMap<String, Node>();

	/**
	 * grow a network: Starting with one peer, repeatedly let peers spawn or
	 * leave at random
	 * 
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {

		System.setProperty("java.util.logging.config.file",
				"logging.properties");

		try {
			LogManager.getLogManager().readConfiguration();
		}

		catch (Exception e) {
			e.printStackTrace();
		}

		nodes.put("a", new Node());

		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String s;
		while ((s = in.readLine()) != null && s.length() != 0) {
			String[] splitted = s.split(" ");

			String node = splitted[0];
			String cmd = splitted[1];

			if (nodes.containsKey(node)) {

				switch (cmd) {
				case "spawn":
					if (splitted.length > 2) {
						Node newNode = nodes.get(node).spawn();
						String newNodeName = splitted[2];
						nodes.put(newNodeName, newNode);
					} else {
						System.out
								.println("Please enter a name for the new node.");
					}
					break;
				case "leave":
					Node theNode = nodes.get(node);
					theNode.leave();
					nodes.remove(theNode);
					break;
				default:
					System.out.println("Unknown command.");
					break;
				}

			} else {
				System.out.println("No such node.");
			}
		}
	}
}