source: src/main/java/agents/anac/y2019/harddealer/HardDealer_AS.java@ 200

package agents.anac.y2019.harddealer;

import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import genius.core.boaframework.AcceptanceStrategy;
import genius.core.boaframework.Actions;
import genius.core.boaframework.BOAparameter;
import genius.core.boaframework.NegotiationSession;
import genius.core.boaframework.OfferingStrategy;
import genius.core.boaframework.OpponentModel;
import genius.core.utility.AdditiveUtilitySpace;

/**
 * This Acceptance Condition will accept an opponent bid if the utility is
 * higher than the acceptance boundary or higher than the bid the agent is 
 * ready to present.
 */
public class HardDealer_AS extends AcceptanceStrategy {
        private double a;
        private double b;
        private double reservationValue;
        private double k;
        /** Concession factor */
        private double e;

        /**
         * Empty constructor for the BOA framework.
         */
        public HardDealer_AS() {
        }

        public double f(double t) {
                // First 10% of session: Slowly come up from bids with util .9
                if (t < .1)
                {
                        return 20*(t-0.1)*(t-0.1);
                }
                else
                {
                        if (e == 0)
                        {
                                return k;
                        }
                        double ft = k + (1 - k) * Math.pow(t, 1.0 / e);
                        return ft;
                }

        }

        public double p(double t) {
                return this.reservationValue + (1 - this.reservationValue) * (1 - f(t));
        }

        /** 
         * Method directly called after creating the party which is used to 
         * initialize the component.
         */
        @Override
        public void init(NegotiationSession negoSession, OfferingStrategy strat,
                        OpponentModel opponentModel, Map<String, Double> parameters)
                        throws Exception {
                this.negotiationSession = negoSession;
                this.offeringStrategy = strat;
                this.e = (1.8) / negotiationSession.getTimeline().getTotalTime(); 
                                
                if (parameters.get("a") != null || parameters.get("b") != null) {
                        a = parameters.get("a");
                        b = parameters.get("b");
                } else {
                        a = 1;
                        b = 0;
                }
                this.reservationValue = negotiationSession.getUtilitySpace().getReservationValue();
                
                if (parameters.get("k") != null)
                        this.k = parameters.get("k");
                else
                        this.k = 0;
        }

        @Override
        public String printParameters() {
                String str = "[a: " + a + " b: " + b + "]";
                return str;
        }
        

        /** 
         * Method which determines if the party should accept the opponent’s bid.
         */ 
        @Override
        public Actions determineAcceptability() {
                double normalizedTime = negotiationSession.getTime(); // Normalized time
                
                //CURVE Accepting
                double acceptationValue = p(normalizedTime);

                double nextMyBidUtil = offeringStrategy.getNextBid()
                                .getMyUndiscountedUtil(); // The next bid to propose
                double lastOpponentBidUtil = negotiationSession.getOpponentBidHistory()
                                .getLastBidDetails().getMyUndiscountedUtil(); 
                if ((a * lastOpponentBidUtil + b >= nextMyBidUtil) || (a * lastOpponentBidUtil + b >= acceptationValue)) {
                        return Actions.Accept;
                }
                // Otherwise reject
                return Actions.Reject;
        }

        @Override
        public Set<BOAparameter> getParameterSpec() {

                Set<BOAparameter> set = new HashSet<BOAparameter>();
                set.add(new BOAparameter("a", 1.0,
                                "Accept when the opponent's utility * a + b is greater than "
                                + "the utility of our current bid or our acceptance boundary"));
                set.add(new BOAparameter("b", 0.0,
                                "Accept when the opponent's utility * a + b is greater than "
                                + "the utility of our current bid or our acceptance boundary"));

                return set;
        }

        @Override
        public String getName() {
                return "HardDealer_AS";
        }
}