Method: computeNextMove(int, FzgPlayer, FzgState)

1: package de.fhdw.gaming.ipspiel23.freizeitgestaltung.strategy;
2:
3: import java.util.Optional;
4: import java.util.Random;
5:
6: import de.fhdw.gaming.core.domain.GameException;
7: import de.fhdw.gaming.ipspiel23.freizeitgestaltung.domain.FzgPlayer;
8: import de.fhdw.gaming.ipspiel23.freizeitgestaltung.domain.FzgState;
9: import de.fhdw.gaming.ipspiel23.freizeitgestaltung.domain.FzgStrategy;
10: import de.fhdw.gaming.ipspiel23.freizeitgestaltung.move.Answer;
11: import de.fhdw.gaming.ipspiel23.freizeitgestaltung.move.AnswerOptions;
12: import de.fhdw.gaming.ipspiel23.freizeitgestaltung.move.factory.AnswerFactory;
13:
14: /**
15: * Implements a mixed strategy which aims to create a balance between the players outcomes.
16: */
17: public class MixedStrategy implements FzgStrategy {
18:
19: /**
20: * Random number generator for implementing a mixed strategy.
21: */
22: private static final Random RANDOM = new Random();
23:
24: /**
25: * Factory for creating answers.
26: */
27: private final AnswerFactory answerFactory;
28:
29: /**
30: * Constructor.
31: * @param answerFactory {@link AnswerFactory} factory to create the answer.
32: */
33: public MixedStrategy(final AnswerFactory answerFactory) {
34: this.answerFactory = answerFactory;
35: }
36:
37: @Override
38: public Optional<Answer> computeNextMove(final int gameId, final FzgPlayer player, final FzgState state)
39: throws GameException, InterruptedException {
40: final FzgPlayer otherPlayer;
41:• if (state.getFirstPlayer().equals(player)) {
42: otherPlayer = state.getSecondPlayer();
43: } else {
44: otherPlayer = state.getFirstPlayer();
45: }
46:
47: final var outcomes = otherPlayer.getPossibleOutcomes();
48: final double a11 = outcomes.get(AnswerOptions.CINEMA).get(AnswerOptions.CINEMA);
49: final double a12 = outcomes.get(AnswerOptions.CINEMA).get(AnswerOptions.FOOTBALL);
50: final double a21 = outcomes.get(AnswerOptions.FOOTBALL).get(AnswerOptions.CINEMA);
51: final double a22 = outcomes.get(AnswerOptions.FOOTBALL).get(AnswerOptions.FOOTBALL);
52:
53: final double cinemaLikeliness = (a12 + a22) / (a11 - a12 - a21 + a22);
54: final double percentage = RANDOM.nextDouble();
55:• if (percentage <= cinemaLikeliness) {
56: return Optional.of(this.answerFactory.createCinemaAnswer());
57: }
58: return Optional.of(this.answerFactory.createFootballAnswer());
59: }
60:
61: @Override
62: public String toString() {
63: return this.getClass().getSimpleName();
64: }
65: }