454 lines
20 KiB
Python
454 lines
20 KiB
Python
import random
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import copy
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import math
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import discord
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from .hexDraw import DrawHex
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BOARDWIDTH = 11
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ALL_POSITIONS = [(i,j) for i in range(11) for j in range(11)]
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ALL_SET = set(ALL_POSITIONS)
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EMPTY_DIJKSTRA = {}
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for position in ALL_POSITIONS:
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EMPTY_DIJKSTRA[position] = math.inf # an impossibly high number
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HEX_DIRECTIONS = [(0,1),(-1,1),(-1,0),(0,-1),(1,-1),(1,0)]
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class HexGame():
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def __init__(self, bot):
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self.bot = bot
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self.draw = DrawHex(bot)
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async def surrender(self, ctx):
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channel = str(ctx.channel_id)
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game = self.bot.database["hex games"].find_one({"_id":channel})
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user = f"#{ctx.author.id}"
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players = game["players"]
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if user not in players:
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await ctx.send("You can't surrender when you're not a player.")
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else:
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opponent = (players.index(user) + 1) % 2
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opponentName = self.bot.databaseFuncs.getName(players[opponent])
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self.bot.database["hex games"].update_one({"_id":channel},{"$set":{"winner":opponent + 1}})
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await ctx.send(f"{ctx.author.display_name} surrendered. That means {opponentName} won! Adding 30 Gwendobucks to their account")
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with open(f"resources/games/oldImages/hex{channel}", "r") as f:
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oldImage = await ctx.channel.fetch_message(int(f.read()))
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if oldImage is not None:
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await oldImage.delete()
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else:
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self.bot.log("The old image was already deleted")
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self.bot.log("Sending the image")
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filePath = f"resources/games/hexBoards/board{channel}.png"
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oldImage = await ctx.channel.send(file = discord.File(filePath))
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with open(f"resources/games/oldImages/hex{channel}", "w") as f:
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f.write(str(oldImage.id))
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# Swap
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async def swap(self, ctx):
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channel = str(ctx.channel_id)
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game = self.bot.database["hex games"].find_one({"_id":channel})
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user = f"#{ctx.author.id}"
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if game is None:
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await ctx.send("You can't swap nothing")
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elif user not in game["players"]:
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await ctx.send("You're not in the game")
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elif len(game["gameHistory"]) != 1: # Only after the first move
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await ctx.send("You can only swap as the second player after the very first move.")
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elif user != game["players"][game["turn"]-1]:
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await ctx.send("You can only swap after your opponent has placed their piece")
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else:
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self.bot.database["hex games"].update_one({"_id":channel},
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{"$set":{"players":game["players"][::-1]}}) # Swaps their player-number
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# Swaps the color of the hexes on the board drawing:
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self.draw.drawSwap(channel)
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opponent = game["players"][::-1][game["turn"]-1]
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gwendoTurn = (opponent == f"#{self.bot.user.id}")
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opponentName = self.bot.databaseFuncs.getName(opponent)
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await ctx.send(f"The color of the players were swapped. It is now {opponentName}'s turn")
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with open(f"resources/games/oldImages/hex{channel}", "r") as f:
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oldImage = await ctx.channel.fetch_message(int(f.read()))
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if oldImage is not None:
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await oldImage.delete()
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else:
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self.bot.log("The old image was already deleted")
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self.bot.log("Sending the image")
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filePath = f"resources/games/hexBoards/board{channel}.png"
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oldImage = await ctx.channel.send(file = discord.File(filePath))
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with open(f"resources/games/oldImages/hex{channel}", "w") as f:
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f.write(str(oldImage.id))
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if gwendoTurn:
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await self.hexAI(ctx)
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# Starts the game
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async def start(self, ctx, opponent):
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try:
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await ctx.defer()
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except:
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self.bot.log("Defer failed")
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user = f"#{ctx.author.id}"
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channel = str(ctx.channel_id)
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game = self.bot.database["hex games"].find_one({"_id":channel})
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startedGame = False
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canStart = True
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if game != None:
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sendMessage = "There's already a hex game going on in this channel"
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logMessage = "There was already a game going on"
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canStart = False
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else:
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if type(opponent) == int:
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# Opponent is Gwendolyn
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if opponent in range(1, 6):
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opponentName = "Gwendolyn"
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difficulty = int(opponent)
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diffText = f" with difficulty {difficulty}"
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opponent = f"#{self.bot.user.id}"
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else:
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sendMessage = "Difficulty doesn't exist"
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logMessage = "They tried to play against a difficulty that doesn't exist"
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canStart = False
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elif type(opponent) == discord.member.Member:
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if opponent.bot:
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# User has challenged a bot
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if opponent == self.bot.user:
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# It was Gwendolyn
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opponentName = "Gwendolyn"
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difficulty = 2
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diffText = f" with difficulty {difficulty}"
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opponent = f"#{self.bot.user.id}"
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else:
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sendMessage = "You can't challenge a bot!"
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logMessage = "They tried to challenge a bot"
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canStart = False
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else:
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# Opponent is another player
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if ctx.author != opponent:
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opponentName = opponent.display_name
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opponent = f"#{opponent.id}"
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difficulty = 5
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diffText = ""
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else:
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sendMessage = "You can't play against yourself"
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logMessage = "They tried to play against themself"
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canStart = False
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else:
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canStart = False
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logMessage = f"Opponent was neither int or member. It was {type(opponent)}"
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sendMessage = "Something went wrong"
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if canStart:
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# board is 11x11
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board = [[0 for i in range(BOARDWIDTH)] for j in range(BOARDWIDTH)]
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players = [user, opponent]
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random.shuffle(players) # random starting player
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gameHistory = []
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newGame = {"_id":channel,"board":board, "winner":0,
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"players":players, "turn":1, "difficulty":difficulty, "gameHistory":gameHistory}
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self.bot.database["hex games"].insert_one(newGame)
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# draw the board
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self.draw.drawBoard(channel)
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gwendoTurn = (players[0] == f"#{self.bot.user.id}")
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startedGame = True
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turnName = self.bot.databaseFuncs.getName(players[0])
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sendMessage = f"Started Hex game against {opponentName}{diffText}. It's {turnName}'s turn"
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logMessage = "Game started"
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await ctx.send(sendMessage)
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self.bot.log(logMessage)
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if startedGame:
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filePath = f"resources/games/hexBoards/board{ctx.channel_id}.png"
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newImage = await ctx.channel.send(file = discord.File(filePath))
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with open(f"resources/games/oldImages/hex{ctx.channel_id}", "w") as f:
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f.write(str(newImage.id))
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if gwendoTurn:
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await self.hexAI(ctx)
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# Places a piece at the given location and checks things afterwards
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async def placeHex(self, ctx, position : str, user):
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channel = str(ctx.channel_id)
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game = self.bot.database["hex games"].find_one({"_id":channel})
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placedPiece = False
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if game == None:
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sendMessage = "There's no game in this channel"
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self.bot.log("There was no game going on")
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elif not (position[0].isalpha() and position[1].isnumeric() and len(position) == 2):
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sendMessage = "The position must be a letter followed by a number."
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self.bot.log(f"The position was not valid, {position}")
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else:
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players = game["players"]
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if user not in players:
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sendMessage = f"You can't place when you're not in the game. The game's players are: {self.bot.databaseFuncs.getName(game['players'][0])} and {self.bot.databaseFuncs.getName(game['players'][1])}."
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self.bot.log("They aren't in the game")
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elif players[game["turn"]-1] != user:
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sendMessage = "It's not your turn"
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self.bot.log("It wasn't their turn")
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else:
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player = game["turn"]
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turn = game["turn"]
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board = game["board"]
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self.bot.log("Placing a piece on the board with placeHex()")
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# Places on board
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board = self.placeOnHexBoard(board,player,position)
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if board is None:
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self.bot.log("It was an invalid position")
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sendMessage = ("That's an invalid position. You must place your piece on an empty field.")
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else:
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# If the move is valid:
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self.bot.database["hex games"].update_one({"_id":channel},{"$set":{"board":board}})
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turn = (turn % 2) + 1
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self.bot.database["hex games"].update_one({"_id":channel},{"$set":{"turn":turn}})
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# Checking for a win
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self.bot.log("Checking for win")
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winner = self.evaluateBoard(game["board"])[1]
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if winner == 0: # Continue with the game.
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gameWon = False
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sendMessage = self.bot.databaseFuncs.getName(game["players"][player-1])+" placed at "+position.upper()+". It's now "+self.bot.databaseFuncs.getName(game["players"][turn-1])+"'s turn."# The score is "+str(score)
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else: # Congratulations!
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gameWon = True
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self.bot.database["hex games"].update_one({"_id":channel},{"$set":{"winner":winner}})
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sendMessage = self.bot.databaseFuncs.getName(game["players"][player-1])+" placed at "+position.upper()+" and won!"
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if game["players"][winner-1] != f"#{self.bot.user.id}":
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winAmount = game["difficulty"]*10
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sendMessage += " Adding "+str(winAmount)+" GwendoBucks to their account."
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self.bot.database["hex games"].update_one({"_id":channel},
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{"$push":{"gameHistory":(int(position[1])-1, ord(position[0])-97)}})
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# Is it now Gwendolyn's turn?
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gwendoTurn = False
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if game["players"][turn-1] == f"#{self.bot.user.id}":
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self.bot.log("It's Gwendolyn's turn")
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gwendoTurn = True
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placedPiece = True
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if user == f"#{self.bot.user.id}":
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await ctx.channel.send(sendMessage)
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else:
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await ctx.send(sendMessage)
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if placedPiece:
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# Update the board
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self.draw.drawHexPlacement(channel,player, position)
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with open(f"resources/games/oldImages/hex{channel}", "r") as f:
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oldImage = await ctx.channel.fetch_message(int(f.read()))
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if oldImage is not None:
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await oldImage.delete()
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else:
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self.bot.log("The old image was already deleted")
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self.bot.log("Sending the image")
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filePath = f"resources/games/hexBoards/board{channel}.png"
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oldImage = await ctx.channel.send(file = discord.File(filePath))
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if gameWon:
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self.bot.log("Dealing with the winning player")
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game = self.bot.database["hex games"].find_one({"_id":channel})
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winner = game["winner"]
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if game["players"][winner-1] != f"#{self.bot.user.id}":
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winnings = game["difficulty"]*10
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self.bot.money.addMoney(game["players"][winner-1].lower(),winnings)
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else:
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with open(f"resources/games/oldImages/hex{channel}", "w") as f:
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f.write(str(oldImage.id))
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if gwendoTurn:
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await self.hexAI(ctx)
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# Returns a board where the placement has ocurred
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def placeOnHexBoard(self, board,player,position):
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# Translates the position
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position = position.lower()
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# Error handling
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column = ord(position[0]) - 97 # ord() translates from letter to number
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row = int(position[1:]) - 1
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if column not in range(BOARDWIDTH) or row not in range(BOARDWIDTH):
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self.bot.log("Position out of bounds")
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return None
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# Place at the position
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if board[row][column] == 0:
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board[row][column] = player
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return board
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else:
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self.bot.log("Cannot place on existing piece (error code 1532)")
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return None
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# After your move, you have the option to undo get your turn back #TimeTravel
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async def undo(self, ctx):
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channel = str(ctx.channel_id)
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user = f"#{ctx.author.id}"
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undid = False
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game = self.bot.database["hex games"].find_one({"_id":channel})
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if user not in game["players"]:
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sendMessage = "You're not a player in the game"
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elif len(game["gameHistory"]) == 0:
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sendMessage = "You can't undo nothing"
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elif user != game["players"][(game["turn"] % 2)]: # If it's not your turn
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sendMessage = "It's not your turn"
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else:
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turn = game["turn"]
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self.bot.log("Undoing {}'s last move".format(self.bot.databaseFuncs.getName(user)))
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lastMove = game["gameHistory"].pop()
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game["board"][lastMove[0]][lastMove[1]] = 0
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self.bot.database["hex games"].update_one({"_id":channel},
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{"$set":{"board":game["board"]}})
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self.bot.database["hex games"].update_one({"_id":channel},
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{"$set":{"turn":turn%2 + 1}})
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# Update the board
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self.draw.drawHexPlacement(channel,0,"abcdefghijk"[lastMove[1]]+str(lastMove[0]+1)) # The zero makes the hex disappear
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sendMessage = f"You undid your last move at {lastMove}"
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undid = True
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await ctx.send(sendMessage)
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if undid:
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with open(f"resources/games/oldImages/hex{channel}", "r") as f:
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oldImage = await ctx.channel.fetch_message(int(f.read()))
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if oldImage is not None:
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await oldImage.delete()
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else:
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self.bot.log("The old image was already deleted")
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self.bot.log("Sending the image")
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filePath = f"resources/games/hexBoards/board{channel}.png"
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oldImage = await ctx.channel.send(file = discord.File(filePath))
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with open(f"resources/games/oldImages/hex{channel}", "w") as f:
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f.write(str(oldImage.id))
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# Plays as the AI
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async def hexAI(self, ctx):
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channel = str(ctx.channel_id)
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self.bot.log("Figuring out best move")
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game = self.bot.database["hex games"].find_one({"_id":channel})
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board = game["board"]
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if len(game["gameHistory"]):
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lastMove = game["gameHistory"][-1]
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else:
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lastMove = (5,5)
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# These moves are the last move +- 2.
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moves = [[(lastMove[0]+j-2,lastMove[1]+i-2) for i in range(5) if lastMove[1]+i-2 in range(11)] for j in range(5) if lastMove[0]+j-2 in range(11)]
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moves = sum(moves,[])
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movesCopy = moves.copy()
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for move in movesCopy:
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if board[move[0]][move[1]] != 0:
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moves.remove(move)
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chosenMove = random.choice(moves)
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placement = "abcdefghijk"[chosenMove[1]]+str(chosenMove[0]+1)
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self.bot.log(f"ChosenMove is {chosenMove} at {placement}")
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await self.placeHex(ctx, placement, f"#{self.bot.user.id}")
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def evaluateBoard(self, board):
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scores = {1:0, 2:0}
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winner = 0
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# Here, I use Dijkstra's algorithm to evaluate the board, as proposed by this article: https://towardsdatascience.com/hex-creating-intelligent-adversaries-part-2-heuristics-dijkstras-algorithm-597e4dcacf93
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for player in [1,2]:
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Distance = copy.deepcopy(EMPTY_DIJKSTRA)
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# Initialize the starting hexes. For the blue player, this is the leftmost column. For the red player, this is the tom row.
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for start in (ALL_POSITIONS[::11] if player == 2 else ALL_POSITIONS[:11]):
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# An empty hex adds a of distance of 1. A hex of own color add distance 0. Opposite color adds infinite distance.
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Distance[start] = 1 if (board[start[0]][start[1]] == 0) else 0 if (board[start[0]][start[1]] == player) else math.inf
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visited = set() # Also called sptSet, short for "shortest path tree Set"
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for _ in range(BOARDWIDTH**2): # We can at most check every 121 hexes
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# Find the next un-visited hex, that has the lowest distance
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remainingHexes = ALL_SET.difference(visited)
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A = [Distance[k] for k in remainingHexes] # Find the distance to each un-visited hex
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u = list(remainingHexes)[A.index(min(A))] # Chooses the one with the lowest distance
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# Find neighbors of the hex u
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for di in HEX_DIRECTIONS:
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v = (u[0] + di[0] , u[1] + di[1]) # v is a neighbor of u
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if v[0] in range(11) and v[1] in range(11) and v not in visited:
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new_dist = Distance[u] + (1 if (board[v[0]][v[1]] == 0) else 0 if (board[v[0]][v[1]] == player) else math.inf)
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Distance[v] = min(Distance[v], new_dist)
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# After a hex has been visited, this is noted
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visited.add(u)
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#self.bot.log("Distance from player {}'s start to {} is {}".format(player,u,Distance[u]))
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if u[player-1] == 10: # if the right coordinate of v is 10, it means we're at the goal
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scores[player] = Distance[u] # A player's score is the shortest distance to goal. Which equals the number of remaining moves they need to win if unblocked by the opponent.
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break
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else:
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self.bot.log("For some reason, no path to the goal was found. ")
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if scores[player] == 0:
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winner = player
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break # We don't need to check the other player's score, if player1 won.
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return scores[2]-scores[1], winner
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def minimaxHex(self, board, depth, alpha, beta, maximizingPlayer):
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# The depth is how many moves ahead the computer checks. This value is the difficulty.
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if depth == 0 or 0 not in sum(board,[]):
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score = self.evaluateBoard(board)[0]
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return score
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# if final depth is not reached, look another move ahead:
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if maximizingPlayer: # red player predicts next move
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maxEval = -math.inf
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possiblePlaces = [i for i,v in enumerate(sum(board,[])) if v == 0]
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#self.bot.log("Judging a red move at depth {}".format(depth))
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for i in possiblePlaces:
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testBoard = copy.deepcopy(board)
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testBoard[i // BOARDWIDTH][i % BOARDWIDTH] = 1 # because maximizingPlayer is Red which is number 1
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evaluation = self.minimaxHex(testBoard,depth-1,alpha,beta,False)
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maxEval = max(maxEval, evaluation)
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alpha = max(alpha, evaluation)
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if beta <= alpha:
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#self.bot.log("Just pruned something!")
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break
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return maxEval
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else: # blue player predicts next move
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minEval = math.inf
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possiblePlaces = [i for i,v in enumerate(sum(board,[])) if v == 0]
|
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#self.bot.log("Judging a blue move at depth {}".format(depth))
|
|
for i in possiblePlaces:
|
|
testBoard = copy.deepcopy(board)
|
|
testBoard[i // BOARDWIDTH][i % BOARDWIDTH] = 2 # because minimizingPlayer is Blue which is number 2
|
|
evaluation = self.minimaxHex(testBoard,depth-1,alpha,beta,True)
|
|
minEval = min(minEval, evaluation)
|
|
beta = min(beta, evaluation)
|
|
if beta <= alpha:
|
|
#self.bot.log("Just pruned something!")
|
|
break
|
|
return minEval
|
|
|