source: anac2020/agentxx/src/main/java/geniusweb/exampleparties/randomparty/RandomParty.java@ 3

package geniusweb.exampleparties.randomparty;

import java.io.IOException;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Random;
import java.util.logging.Level;

import geniusweb.actions.Accept;
import geniusweb.actions.Action;
import geniusweb.actions.Offer;
import geniusweb.actions.PartyId;
import geniusweb.bidspace.AllPartialBidsList;
import geniusweb.issuevalue.Bid;
import geniusweb.party.Capabilities;
import geniusweb.party.DefaultParty;
import geniusweb.party.inform.ActionDone;
import geniusweb.party.inform.Finished;
import geniusweb.party.inform.Inform;
import geniusweb.party.inform.Settings;
import geniusweb.party.inform.YourTurn;
import geniusweb.profile.PartialOrdering;
import geniusweb.profile.Profile;
import geniusweb.profile.utilityspace.UtilitySpace;
import geniusweb.profileconnection.ProfileConnectionFactory;
import geniusweb.profileconnection.ProfileInterface;
import geniusweb.progress.Progress;
import geniusweb.progress.ProgressRounds;
import tudelft.utilities.logging.Reporter;

/**
 * A simple party that places random bids and accepts when it receives an offer
 * with sufficient utility.
 */
public class RandomParty extends DefaultParty {

        private Bid lastReceivedBid = null;
        private PartyId me;
        private final Random random = new Random();
        protected ProfileInterface profileint;
        private Progress progress;

        public RandomParty() {
        }

        public RandomParty(Reporter reporter) {
                super(reporter); // for debugging
        }

        @Override
        public void notifyChange(Inform info) {
                try {
                        if (info instanceof Settings) {
                                Settings settings = (Settings) info;
                                this.profileint = ProfileConnectionFactory
                                                .create(settings.getProfile().getURI(), getReporter());
                                this.me = settings.getID();
                                this.progress = settings.getProgress();
                        } else if (info instanceof ActionDone) {
                                Action otheract = ((ActionDone) info).getAction();
                                if (otheract instanceof Offer) {
                                        lastReceivedBid = ((Offer) otheract).getBid();
                                }
                        } else if (info instanceof YourTurn) {
                                myTurn();
                                if (progress instanceof ProgressRounds) {
                                        progress = ((ProgressRounds) progress).advance();
                                }
                        } else if (info instanceof Finished) {
                                getReporter().log(Level.INFO, "Final ourcome:" + info);
                        }
                } catch (Exception e) {
                        throw new RuntimeException("Failed to handle info", e);
                }
        }

        @Override
        public Capabilities getCapabilities() {
                return new Capabilities(new HashSet<>(Arrays.asList("SAOP")));
        }

        @Override
        public String getDescription() {
                return "places random bids until it can accept an offer with utility >0.6";
        }

        private void myTurn() throws IOException {
                Action action;
                if (isGood(lastReceivedBid)) {
                        action = new Accept(me, lastReceivedBid);
                } else {
                        // for demo. Obviously full bids have higher util in general
                        AllPartialBidsList bidspace = new AllPartialBidsList(
                                        profileint.getProfile().getDomain());
                        Bid bid = null;
                        for (int attempt = 0; attempt < 20 && !isGood(bid); attempt++) {
                                long i = random.nextInt(bidspace.size().intValue());
                                bid = bidspace.get(BigInteger.valueOf(i));
                        }
                        action = new Offer(me, bid);
                }
                getConnection().send(action);

        }

        private boolean isGood(Bid bid) throws IOException {
                if (bid == null)
                        return false;
                Profile profile = profileint.getProfile();
                if (profile instanceof UtilitySpace) {
                        return ((UtilitySpace) profile).getUtility(bid).doubleValue() > 0.6;
                }
                if (profile instanceof PartialOrdering) {
                        return ((PartialOrdering) profile).isPreferredOrEqual(bid,
                                        profile.getReservationBid());
                }
                throw new IllegalArgumentException(
                                "Can not handle profile type " + profile.getClass());
        }

}