package geniusweb.simplerunner;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.logging.Level;

import com.fasterxml.jackson.databind.ObjectMapper;

import geniusweb.protocol.NegoSettings;
import geniusweb.simplerunner.gui.GUI;
import tudelft.utilities.logging.Reporter;

/**
 * A simple tool to run a negotiation stand-alone, without starting the servers.
 * All referred files and classes need to be stored locally (or be in the
 * dependency list if you use maven).
 * <p>
 * <em>IMPORTANT</em> SimpleRunner has a number of restrictions, compared to a
 * run using a runserver and partyserver
 * <ul>
 * <li>With stand-alone runner, your parties are run together in a single
 * classloader. The main implication is that there may arise version conflicts
 * between parties.
 * <li>Stand-alone runner does NOT enforce the time deadline. Parties may
 * continue running indefinitely and thus bog down the JVM and stalling
 * tournaments.
 * </ul>
 */
public class NegoRunner {
	private final static ObjectMapper jackson = new ObjectMapper();

	/**
	 * The main runner
	 * 
	 * @param args should have 0 or 1 argument. If 0 arguments, the {@link GUI}
	 *             is started. If one argoment, it should be a filename
	 *             containing a settings.json file. That session is then run.
	 * @throws IOException if problem occurs
	 */
	public static void main(String[] args) throws IOException {
		if (args.length == 0) {
			GUI.main(args);
			return;
		}
		if (args.length != 1) {
			showusage();
			return;
		}
		String serialized = new String(Files.readAllBytes(Paths.get(args[0])),
				StandardCharsets.UTF_8);
		NegoSettings settings = jackson.readValue(serialized,
				NegoSettings.class);

		Runner runner = new Runner(settings, new ClassPathConnectionFactory(),
				new StdOutReporter(), 0);
		runner.run();
	}

	private static void showusage() {
		System.err.println("GeniusWeb stand-alone runner.");
		System.err.println("first argument should be <settings.json>.");
		System.err.println(
				"The settings.json file should contain the NegoSettings.");
		System.err.println(
				"See the settings.json example file and the GeniusWeb wiki pages. ");

	}

}

class StdOutReporter implements Reporter {
	@Override
	public void log(Level level, String msg) {
		if (level == Level.WARNING || level == Level.SEVERE)
			System.err.println(level + ":" + msg);
		else
			System.out.println(level + ":" + msg);
	}

	@Override
	public void log(Level arg0, String msg, Throwable arg2) {
		log(arg0, msg);
	}

}