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package com.sun.enterprise.config.util;

import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.config.serverbeans.SystemProperty;
import com.sun.enterprise.util.net.NetUtils;
import java.util.*;
import org.jvnet.hk2.config.TransactionFailure;
import static com.sun.enterprise.util.net.NetUtils.MAX_PORT;
import static com.sun.enterprise.config.util.PortConstants.*;

/**
 * static methods useful for dealing with ports.
 * @author Byron Nevins
 */
final class PortUtils {

    private PortUtils() {
        // no instances allowed!
    }

    /**
     * Make sure all ports that are specified by the user make sense.
     * @param server The new Server element
     * @return null if all went OK.  Otherwise return a String with the error message.
     */
    static void checkInternalConsistency(Server server) throws TransactionFailure {
        // Make sure all the system properties for ports have different numbers.
        List sysProps = server.getSystemProperty();
        Set ports = new TreeSet();

        for (SystemProperty sp : sysProps) {
            String name = sp.getName();

            if (PORTSLIST.contains(name)) {
                String val = sp.getValue();

                try {
                    boolean wasAdded = ports.add(Integer.parseInt(val));

                    if (!wasAdded) //TODO unit test
                        throw new TransactionFailure(Strings.get("PortUtils.duplicate_port", val, server.getName()));
                }
                catch(TransactionFailure tf) {
                    // don't re-wrap the same Exception type!
                    throw tf;
                }
                catch (Exception e) {  //TODO unit test
                    throw new TransactionFailure(Strings.get("PortUtils.non_int_port", val, server.getName()));
                }
            }
        }
        checkForLegalPorts(ports, server.getName());
    }

    /**
     *
     * @param ports
     * @param serverName
     * @return a message if error, nu8ll means A-OK
     */
    private static void checkForLegalPorts(Set ports, String serverName) throws TransactionFailure {
        for (int port : ports)
            if (!NetUtils.isPortValid(port))
                throw new TransactionFailure(Strings.get("PortUtils.illegal_port_number", port, serverName, MAX_PORT));
    }
}