source: src/main/java/agents/anac/y2019/minf/etc/AC_Next.java

package agents.anac.y2019.minf.etc;

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.timeline.Timeline;

public class AC_Next extends AcceptanceStrategy {

        private double a;
        private double b;

        /** Negotiation Information */
        private NegotiationInfo negotiationInfo;

        public AC_Next(){
        }

        public AC_Next(NegotiationInfo negInfo){
                negotiationInfo = negInfo;
        }

        public AC_Next(NegotiationSession negoSession, OfferingStrategy strat,
                        double alpha, double beta) {
                this.negotiationSession = negoSession;
                this.offeringStrategy = strat;
                this.a = alpha;
                this.b = beta;
        }

        @Override
        public void init(NegotiationSession negoSession, OfferingStrategy strat,
                        OpponentModel opponentModel, Map<String, Double> parameters)
                        throws Exception {
                this.negotiationSession = negoSession;
                this.offeringStrategy = strat;

                if (parameters.get("a") != null || parameters.get("b") != null) {
                        a = parameters.get("a");
                        b = parameters.get("b");
                } else {
                        a = 1;
                        b = 0;
                }
        }

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

        @Override
        public Actions determineAcceptability() {
                double time = negotiationSession.getTime();
                double lastOpponentBidUtil = negotiationSession.getOpponentBidHistory()
                                .getLastBidDetails().getMyUndiscountedUtil();
                double nextMyBidUtil = offeringStrategy.getNextBid().getMyUndiscountedUtil();
                double threshold = negotiationInfo.getThreshold(time);

                if (a * lastOpponentBidUtil + b >= (nextMyBidUtil + threshold)/2.0D) {
                        return Actions.Accept;
                }

                if (time >= 0.975 && lastOpponentBidUtil >= 0.9D) {
                        return Actions.Accept;
                }

                if (threshold <= negotiationSession.getUtilitySpace().getReservationValueUndiscounted()){
                        return Actions.Break;
                }

                if (negotiationSession.getTimeline().getType() == Timeline.Type.Time && time >= 0.999) {
                        if (negotiationSession.getUtilitySpace().getReservationValueUndiscounted() <= lastOpponentBidUtil) {
                                return Actions.Accept;
                        }
                }

                if (negotiationSession.getTimeline().getType() == Timeline.Type.Rounds
                                && negotiationSession.getTimeline().getCurrentTime() == negotiationSession.getTimeline().getTotalTime()-1){
                        if (negotiationSession.getUtilitySpace().getReservationValueUndiscounted() <= lastOpponentBidUtil) {
                                if(!negotiationInfo.isFirst() ||
                                                negotiationSession.getOpponentBidHistory().getBestBidDetails().getMyUndiscountedUtil()
                                                != negotiationSession.getOpponentBidHistory().getWorstBidDetails().getMyUndiscountedUtil()){
                                        return Actions.Accept;
                                }
                        }
                }

                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"));
                set.add(new BOAparameter("b", 0.0,
                                "Accept when the opponent's utility * a + b is greater than the utility of our current bid"));

                return set;
        }

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