source: src/main/java/negotiator/parties/UIAgentExtended.java

package negotiator.parties;

import java.awt.Toolkit;
import java.util.ArrayList;

import javax.swing.JOptionPane;

import genius.core.Agent;
import genius.core.Bid;
import genius.core.SupportedNegotiationSetting;
import genius.core.actions.Accept;
import genius.core.actions.Action;
import genius.core.actions.EndNegotiation;
import genius.core.actions.Offer;
import genius.core.utility.AdditiveUtilitySpace;

/**
 * 
 * @author W.Pasman, modified version of Dmytro's UIAgent
 */
public class UIAgentExtended extends Agent {
        private Action opponentAction = null;
        private Bid myPreviousBid = null;

        // Alina added...
        private Bid oppPreviousBid = null;
        protected int bidCounter = 0;
        protected NegoRoundData roundData;
        protected ArrayList<NegoRoundData> historyOfBids = null;

        /** Creates a new instance of UIAgent */

        /**
         * One agent will be kept alive over multiple sessions. Init will be called
         * at the start of each nego session.
         */
        @Override
        public String getVersion() {
                return "2.0";
        }

        public void init() {

                System.out.println("try to init UIAgent");
                System.out.println("Utility Space initialized: " + utilitySpace);
                historyOfBids = new ArrayList<NegoRoundData>();

        }

        private EnterBidDialogExtended getDialog() throws Exception {
                EnterBidDialogExtended ui = new EnterBidDialogExtended(this, null,
                                true, (AdditiveUtilitySpace) utilitySpace, oppPreviousBid);
                // alina: dialog in the center- doesnt really work
                Toolkit t = Toolkit.getDefaultToolkit();
                int x = (int) ((t.getScreenSize().getWidth() - ui.getWidth()) / 2);
                int y = (int) ((t.getScreenSize().getHeight() - ui.getHeight()) / 2);
                ui.setLocation(x, y);
                return ui;
        }

        public void ReceiveMessage(Action opponentAction) {
                this.opponentAction = opponentAction;
                if (opponentAction instanceof Accept)
                        JOptionPane.showMessageDialog(null,
                                        "Opponent accepted your last offer.");

                if (opponentAction instanceof EndNegotiation)
                        JOptionPane.showMessageDialog(null,
                                        "Opponent canceled the negotiation session");

                return;
        }

        public Action chooseAction() {
                try {
                        return chooseAction1();
                } catch (Exception e) {
                        e.printStackTrace();
                }
                return null;
        }

        public Action chooseAction1() throws Exception {
                Action action = getDialog().askUserForAction(opponentAction,
                                myPreviousBid);
                if ((action != null) && (action instanceof Offer)) {
                        myPreviousBid = ((Offer) action).getBid();
                        if (opponentAction != null) {
                                oppPreviousBid = ((Offer) opponentAction).getBid();
                                roundData = new NegoRoundData(oppPreviousBid, myPreviousBid);
                                historyOfBids.add(roundData);
                        }
                        // does this happen only the first time?
                        else {
                                roundData = new NegoRoundData(null, myPreviousBid);
                                historyOfBids.add(roundData);
                        }
                        bidCounter++;
                }

                return action;
        }

        public boolean isUIAgent() {
                return true;
        }

        public Bid getMyPreviousBid() {
                return myPreviousBid;
        }

        public Bid getOppPreviousBid() {
                return oppPreviousBid;
        }

        @Override
        public SupportedNegotiationSetting getSupportedNegotiationSetting() {
                return SupportedNegotiationSetting.getLinearUtilitySpaceInstance();
        }
}

class NegoRoundData {
        private Bid lastOppBid;
        private Bid ourLastBid;

        public NegoRoundData(Bid lastOppBid, Bid ourLastBid) {
                this.lastOppBid = lastOppBid;
                this.ourLastBid = ourLastBid;
        }

        public Bid getOppentBid() {
                return lastOppBid;
        }

        public Bid getOurBid() {
                return ourLastBid;
        }

}