Added the bully bot to the set of provided bots. (#124)

* Added the bully bot to the set of provided bots. 

---------

Co-authored-by: Michael Cochez <[email protected]>

Author: miselico

src/schnapsen/bots/__init__.py

@@ -7,5 +7,6 @@
 from .ml_bot import MLDataBot, MLPlayingBot, train_ML_model
 from .gui.guibot import SchnapsenServer
 from .minimax import MiniMaxBot
+from .bully_bot import BullyBot
 
-__all__ = ["RandBot", "AlphaBetaBot", "RdeepBot", "MLDataBot", "MLPlayingBot", "train_ML_model", "SchnapsenServer", "MiniMaxBot"]
+__all__ = ["RandBot", "AlphaBetaBot", "RdeepBot", "MLDataBot", "MLPlayingBot", "train_ML_model", "SchnapsenServer", "MiniMaxBot", "BullyBot"]

src/schnapsen/bots/bully_bot.py

@@ -0,0 +1,57 @@
+import math
+import random
+from typing import Optional
+from schnapsen.game import Bot, PlayerPerspective, Move, RegularMove
+
+
+class BullyBot(Bot):
+    """This bot plays plays as follows (deterministically using the random number generator provided).
+        The bully bot only plays valid moves.
+        If the bot has cards of the trump suit, it plays one of them at random
+        Else, if the bot is follower and has cards of the same suit as the opponent, play one of these at random.
+        Else, randomly play one of its cards with the highest score
+    Args:
+        rand (random.Random): The random number generator used to make the random choice of cards
+        name (Optional[str]): The optional name of this bot
+    """
+
+    def __init__(self, rand: random.Random, name: Optional[str] = None) -> None:
+        super().__init__(name)
+        self.rng = rand
+
+    def get_move(
+        self,
+        perspective: PlayerPerspective,
+        leader_move: Optional[Move],
+    ) -> Move:
+
+        valid_regular_moves: list[RegularMove] = [move.as_regular_move() for move in perspective.valid_moves() if move.is_regular_move()]
+
+        # If the bot has cards of the trump suit, it plays one of them at random
+        trump_suit = perspective.get_trump_suit()
+        trumps: list[RegularMove] = [move for move in valid_regular_moves if move.card.suit == trump_suit]
+        if trumps:
+            return self.rng.choice(trumps)
+
+        # Else, if the bot is follower and has cards of the same suit as the opponent, play one of these at random.
+        if leader_move is not None:
+            leader_suit = leader_move.cards[0].suit
+            same_suit_moves = [move for move in valid_regular_moves if move.card.suit == leader_suit]
+            if same_suit_moves:
+                return self.rng.choice(same_suit_moves)
+
+        # Else, randomly play one of its cards with the highest score
+        scorer = perspective.get_engine().trick_scorer
+
+        highest_score_till_now = -math.inf
+        highest_moves_till_now = []
+        for move in valid_regular_moves:
+            score = scorer.rank_to_points(move.card.rank)
+            if score > highest_score_till_now:
+                highest_score_till_now = score
+                highest_moves_till_now = [move]
+            elif score == highest_score_till_now:
+                highest_moves_till_now.append(move)
+            else:
+                pass  # not scoring higher, so ignored
+        return self.rng.choice(highest_moves_till_now)