source: src/main/java/agents/anac/y2011/TheNegotiator/Decider.java

package agents.anac.y2011.TheNegotiator;

import genius.core.Agent;
import genius.core.Bid;
import genius.core.actions.Action;
import genius.core.actions.Offer;

/**
 * The Decider class is used to decide each turn which action the agent should
 * perform.
 * 
 * @author Alex Dirkzwager, Mark Hendrikx, Julian de Ruiter
 */
public class Decider {

        // storageobject which contains all possible bids, bids already used, and
        // opponent bids.
        private BidsCollection bidsCollection;
        // reference to the timemanager (manages time related function)
        private TimeManager timeManager;
        // reference to the bidsgenerator (generates a (counter)offer)
        private BidGenerator bidGenerator;
        // reference to the acceptor (generates an action to accept)
        private Acceptor acceptor;
        // reference to the negotiation agent
        private Agent agent;
        private Bid lastOppbid;

        /**
         * Creates a Decider-object which determines which offers should be made
         * during the negotiation.
         * 
         * @param agent
         *            in negotiation
         */
        public Decider(Agent agent) {
                this.agent = agent;
                bidsCollection = new BidsCollection();
                bidGenerator = new BidGenerator(agent, bidsCollection);
                acceptor = new Acceptor(agent.utilitySpace, bidsCollection,
                                agent.getAgentID());
                timeManager = new TimeManager(agent.timeline,
                                agent.utilitySpace.getDiscountFactor(), bidsCollection);
        }

        /**
         * Stores the bids of the partner in the history with the corresponding
         * utility.
         * 
         * @param action
         *            action made by partner
         */
        public void setPartnerMove(Action action) {
                if (action instanceof Offer) {
                        lastOppbid = ((Offer) action).getBid();
                        try {
                                bidsCollection.addPartnerBid(lastOppbid,
                                                agent.utilitySpace.getUtility(lastOppbid),
                                                timeManager.getTime());
                        } catch (Exception e) {

                        }
                }
        }

        /**
         * Method which returns the action to be performed by the agent. Assumes
         * setPartnerMove has been called with last opponent move.
         */
        public Action makeDecision() {

                int phase = timeManager.getPhase(timeManager.getTime());
                int movesLeft = 0;

                if (phase == 3) {
                        movesLeft = timeManager.getMovesLeft();
                }
                // if the negotiation is still going on and a bid has already been made
                double threshold = timeManager.getThreshold(timeManager.getTime());
                Action action = acceptor.determineAccept(phase, threshold,
                                agent.timeline.getTime(), movesLeft, lastOppbid);

                // if we didn't accept, generate an offer (end of negotiation is never
                // played
                if (action == null) {
                        action = bidGenerator.determineOffer(agent.getAgentID(), phase,
                                        timeManager.getThreshold(timeManager.getTime()));
                }
                return action;
        }
}