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package com.sun.enterprise.config.util;

import com.sun.enterprise.config.serverbeans.Cluster;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.config.serverbeans.SystemProperty;
import com.sun.enterprise.util.StringUtils;
import com.sun.enterprise.util.net.NetUtils;
import java.util.*;
import static com.sun.enterprise.config.util.PortConstants.PORTSLIST;

/**
 * Simple pkg-priv class for keeping the system-properties of a Server handy.
 * We add the Port Props in the correct order
 * Order of precedence from LOW to HIGH ==
 * (0) domain
 * (1) cluster
 * (2) config
 * (3) server
 * Just add the props in that same order and we're good to go!
 * Note that I'm VERY paranoid about NPE's
 *
 * @author Byron Nevins
 */
class ServerPorts {

    // The new server is in the middle of its creation transaction which makes
    // things trickier -- its config, for instance, might not be in the domains
    //list of configs yet.
    // So we send everything in explicitly from the Transaction...
    ServerPorts(Cluster cluster, Config config, Domain domain, Server theServer) {
        initialize(cluster, config, domain, theServer);
    }

    // this constructor is for use for pre-existing servers.
    ServerPorts(Domain domain, Server theServer) {
        Cluster cluster = null;
        Config config = null;

        if (theServer.isInstance())
            cluster = domain.getClusterForInstance(theServer.getName());

        String configName = theServer.getConfigRef();

        if (StringUtils.ok(configName))
            config = domain.getConfigNamed(configName);

        initialize(cluster, config, domain, theServer);
    }

    Map getMap() {
        return props;
    }

    //////////////////////  all private below   //////////////////////////

    private void initialize(Cluster cluster, Config config, Domain domain, Server theServer) {
        List propList;
        server = theServer;

        // 0. domain
        propList = domain.getSystemProperty();
        addAll(propList);

        // 1. cluster
        if (cluster != null) {
            propList = cluster.getSystemProperty();
            addAll(propList);
        }

        // 2. config
        if (config != null) {
            propList = config.getSystemProperty();
            addAll(propList);
        }

        // 3. server
        propList = server.getSystemProperty();
        addAll(propList);
    }

    private void addAll(List propList) {

        if (propList == null)
            return;

        for (SystemProperty sp : propList) {
            // we only care about
            // 1. the official Port Props that we support
            // 2. But only if they also have a value that is a legal port number

            String name = sp.getName();
            String value = sp.getValue();

            if (StringUtils.ok(name) && StringUtils.ok(value) && PORTSLIST.contains(name)) {
                try {
                    int port = Integer.parseInt(value);

                    if (NetUtils.isPortValid(port))
                        props.put(name, port);
                }
                catch (Exception e) {
                    // we're all done here!
                }
            }
        }
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder("ServerPorts Dump:").append('\n');
        sb.append("server: ").append(server.getName()).append(", ");
        sb.append("Properties: ").append(props).append('\n');
        return sb.toString();
    }
    private Server server;
    private final Map props = new HashMap();
}