source: src/main/java/parties/in4010/q12015/group22/Group22.java@ 126

package parties.in4010.q12015.group22;

import java.util.List;

import genius.core.AgentID;
import genius.core.Bid;
import genius.core.actions.Accept;
import genius.core.actions.Action;
import genius.core.actions.ActionWithBid;
import genius.core.actions.DefaultAction;
import genius.core.actions.Offer;
import genius.core.parties.AbstractNegotiationParty;

/**
 * An attempt to improve the AbstractNegotiationParty.
 * 
 * @author Wesley Quispel 4014901 Group 22 AI Techniques
 */

public class Group22 extends AbstractNegotiationParty {

        private Action opponentAction;
        private static final int AMOUNT_OF_RANDOM_BIDS = 30;
        private static final double MINIMUM_UTILITY_BASENUMBER = 0.8;
        private static final double MAXIMUM_UTILITY_BASENUMBER = 1.0;

        /**
         * The actions that come in from opponents are checked if they are an
         * offer/accept. It is then decided whether if it is acceptable or to make a
         * counter offer.
         *
         * @param validActions
         *            Either a list containing both accept and offer or only offer.
         * @return The chosen action.
         */
        @Override
        public Action chooseAction(List<Class<? extends Action>> validActions) {
                try {
                        if (!validActions.contains(Accept.class)) {
                                if (!isAcceptable()) {
                                        return makeOffer();
                                }
                        } else {
                                if (isAcceptable()) {
                                        return new Accept(getPartyId(),
                                                        ((ActionWithBid) getLastReceivedAction()).getBid());
                                } else {
                                        return makeOffer();
                                }
                        }
                } catch (Exception e) {
                        System.err.println("CBAgent: Making new bid was unsuccessful: "
                                        + e.getMessage());
                }
                return new Accept(getPartyId(),
                                ((ActionWithBid) getLastReceivedAction()).getBid());
        }

        /**
         * Creates an offer after AMOUNT_OF_RANDOM_BIDS iterations with the highest
         * utility.
         * 
         * @return offer The best offer after AMOUNT_OF_RANDOM_BIDS iterations.
         */
        private Action makeOffer() {
                try {
                        double bestUtility = 0.0;
                        Bid bestBid = null;

                        for (int i = 0; i < AMOUNT_OF_RANDOM_BIDS; i++) {
                                Bid randomBid = generateRandomBid();
                                double randomUtility = getUtility(randomBid);
                                if (randomUtility > bestUtility) {
                                        if (isAcceptable(randomUtility)) {
                                                bestUtility = randomUtility;
                                                bestBid = randomBid;
                                        }
                                }
                        }
                        return new Offer(getPartyId(), bestBid);
                } catch (Exception e) {
                        System.err.println("CBAgent: Could not make offer: "
                                        + e.getMessage());
                }
                return makeOffer();
        }

        public boolean isAcceptable(double utility) {
                try {
                        double currentTime = timeline.getTime();
                        int numberOfParties = 0;
                        if (getNumberOfParties() <= 6) {
                                numberOfParties = getNumberOfParties();
                        } else {
                                numberOfParties = 6;
                        }
                        if (0 < utility && utility <= 1) {
                                if (utility > (MINIMUM_UTILITY_BASENUMBER - ((0.15 * currentTime) + (0.02 * numberOfParties)))) {
                                        if (utility < (MAXIMUM_UTILITY_BASENUMBER - ((0.25 * currentTime) + (0.02 * numberOfParties)))) {
                                                return true;
                                        }
                                }
                        } else {
                                return false;
                        }
                } catch (Exception e) {
                        System.err
                                        .println("CBAgent: Could not see whether CBAgent offer was acceptable: "
                                                        + e.getMessage());
                }
                return false;
        }

        public boolean isAcceptable() {
                try {
                        Bid opponentBid = DefaultAction.getBidFromAction(opponentAction);
                        double opponentUtility = getUtility(opponentBid);
                        int numberOfParties = 0;
                        if (getNumberOfParties() <= 6) {
                                numberOfParties = getNumberOfParties();
                        } else {
                                numberOfParties = 6;
                        }
                        double currentTime = timeline.getTime();
                        if (0 < opponentUtility && opponentUtility <= 1) {
                                if (opponentUtility > (MINIMUM_UTILITY_BASENUMBER - ((0.15 * currentTime) + (0.02 * numberOfParties)))) {
                                        return true;
                                } else {
                                        return false;
                                }
                        } else {
                                return false;
                        }
                } catch (Exception e) {
                        System.err
                                        .println("CBAgent: Could not see whether opponent offer was acceptable: "
                                                        + e.getMessage());
                }
                return false;
        }

        // ++++++++++++++++++++++++++++BACKGROUND+METHODS++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

        /**
         * All offers proposed by the other parties will be received as a message.
         * You can use this information to your advantage, for example to predict
         * their utility.
         *
         * @param sender
         *            The party that did the action.
         * @param action
         *            The action that party did.
         */
        @Override
        public void receiveMessage(AgentID sender, Action action) {
                super.receiveMessage(sender, action);
                opponentAction = action;
                // Here you hear other parties' messages
        }

        @Override
        public String getDescription() {
                return "CBAgent";
        }

}