/* $Id$ */
package org.noreply.fancydress.directory;

import org.bouncycastle.util.encoders.Base64;
import org.noreply.fancydress.directory.parser.*;
import org.noreply.fancydress.misc.Util;
import org.noreply.fancydress.crypto.*;
import org.noreply.fancydress.status.*;
import java.util.*;
import java.text.ParseException;
import java.net.InetAddress;
import java.net.UnknownHostException;

/* FIXME: parse allow/deny ACLs */

/**
 * Represent an Incoming/MMTP section of a server descriptor.
 *
 * @see ServerDescriptor
 */
public class IncomingMMTPSection {
	private String name;

	/* Required */
	private String version;
	private InetAddress ip;
	private String hostname;
	private int port;
	private String protocols;

	/**
	 * Construct an Incoming/MMTP section.
	 *
	 * @param section the section to parse.
	 * @throws Mix3BadServerFormatException if the Section is syntactially invalid.
	 */
	public IncomingMMTPSection(DirectorySection section)
		throws Mix3BadServerFormatException
	{
		name = section.getName();
		parseIncomingMMTPSection(section);
	}

	/**
	 * Parse an Incoming/MMTP section.
	 *
	 * @param section the section to parse.
	 * @throws Mix3BadServerFormatException if the Section is syntactially invalid.
	 */
	private void parseIncomingMMTPSection(DirectorySection section) throws Mix3BadServerFormatException {
		/* Check Version */
		DirectoryEntry entryVersion = section.getEntry("Version");
		if (entryVersion == null)
			throw new Mix3BadServerFormatException("Version not in " + name + " section");
		version = entryVersion.getValue();
		if (! version.equals("0.1"))
			/* We have to ignore unknown Versions */
			throw new Mix3BadServerUnrecognizedVersionException("Unrecognized " + name + " Version "+version);

		/* mandatory entries */
		DirectoryEntry entryIP = section.getEntry("IP");
		DirectoryEntry entryHostname = section.getEntry("Hostname");
		DirectoryEntry entryPort = section.getEntry("Port");
		DirectoryEntry entryProtocols = section.getEntry("Protocols");

		/* check if mandatory entries are available */
		if (entryIP == null)
			throw new Mix3BadServerFormatException("IP not in " + name + " section");
		/* FIXME: spec is changing from IP to hostname, for now, hostname is not used */
		/*
		if (entryHostname == null)
			throw new Mix3BadServerFormatException("Hostname not in " + name + " section");
		*/
		if (entryPort == null)
			throw new Mix3BadServerFormatException("Port not in " + name + " section");
		if (entryProtocols == null)
			throw new Mix3BadServerFormatException("Protocols not in " + name + " section");


		try {
			ip = InetAddress.getByName(entryIP.getValue());
		} catch (UnknownHostException e) {
			throw new Mix3BadServerFormatException("IP is not a valid IP adress in " + name + " section", e);
		}
		if (!ip.getHostAddress().equals(entryIP.getValue()))
			throw new Mix3BadServerFormatException(
				"parsed IP to string does not match its directory representation in " + name + " section: "+
				ip.getHostAddress() + " vs. " + entryIP.getValue());

		hostname = entryHostname == null ? null : entryHostname.getValue(); /* FIXME */

		try {
			Integer p = new Integer(entryPort.getValue());
			port = p.intValue();
		} catch (NumberFormatException e) {
			throw new Mix3BadServerFormatException("Port is not a valid integer in " + name + " section", e);
		};
		if (port < 0 || port > 65535)
			throw new Mix3BadServerFormatException("Port is not in TCP/IP port range in " + name + " section");

		protocols = entryProtocols.getValue();
	}
}