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referee.py
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referee.py
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import string
import sys
import os
import subprocess
import threading
import signal
import re
import time
import traceback
try:
import psutil
except:
pass
TIME = 31.0 # Allowed maximum time for a movement
TOTAL_TIME_LIMIT = 121
EMPTY = 0
DARK = 1
LIGHT = 2
MOVE_REGEX = re.compile(b"[m|M]ove [p|P]layed[ \t]*:[ \t]*[a-z][0-9]{1,2}\n")
GAMEOVER = 1111111
class ReversiGame:
board = None
board_size = None
directions_to_flip = None
dark_player = None
light_player = None
def __init__(self, board_size, dark_player, light_player):
self.board_size = board_size
self.board = [[EMPTY for x in range(0, board_size)] for x in range(0, board_size)]
self.board[int(board_size/2) - 1][int(board_size/2) - 1] = LIGHT
self.board[int(board_size/2)][int(board_size/2)] = LIGHT
self.board[int(board_size/2)][int(board_size/2) - 1] = DARK
self.board[int(board_size/2) - 1][int(board_size/2)] = DARK
self.dark_player = dark_player
self.light_player = light_player
def start_game(self):
self.print_board()
self.print_score()
self.dark_player.execute(self.board_size)
self.light_player.execute(self.board_size)
def print_board(self):
sys.stdout.write(" ")
i = 0
for c in string.ascii_lowercase:
i += 1
if i > self.board_size:
break
sys.stdout.write(" %s" % c)
sys.stdout.write("\n +")
for i in range(0, self.board_size):
sys.stdout.write("---+")
sys.stdout.write("\n")
for i in range(0, self.board_size):
sys.stdout.write("%2d |" % (i + 1))
for j in range(0, self.board_size):
if self.board[i][j] == LIGHT:
sys.stdout.write(" L |")
elif self.board[i][j] == DARK:
sys.stdout.write(" D |")
else:
sys.stdout.write(" |")
sys.stdout.write("\n +")
for j in range(0, self.board_size):
sys.stdout.write("---+")
sys.stdout.write("\n")
# Print current score
def print_score(self):
print("Score: Light %d - Dark %d" % (self.light_player.score, self.dark_player.score))
# Print results
def print_results(self):
print("Dark player total playing time (seconds): " + str(self.dark_player.total_time))
print("Light player total playing time (seconds): " + str(self.light_player.total_time))
if self.dark_player.score > self.light_player.score:
print("Dark player wins!")
kill_game(DARK)
elif self.light_player.score > self.dark_player.score:
print("Light player wins!")
kill_game(LIGHT)
else:
print("It's a tie!")
kill_game(5)
def apply_move(self, row, column, color):
score = self.update_board(row, column, color)
if color == LIGHT:
self.light_player.score += score + 1
self.dark_player.score -= score
else:
self.dark_player.score += score + 1
self.light_player.score -= score
def player_has_valid_moves(self, color):
for row in range(0, self.board_size):
for column in range(0, self.board_size):
if self.is_valid_move(row, column, color):
return True
return False
def is_game_over(self):
if self.dark_player.score + self.light_player.score == self.board_size * self.board_size:
return True
if not self.player_has_valid_moves(self.dark_player.color) and not self.player_has_valid_moves(self.light_player.color):
print("No valid moves left for either players")
return True
return False
def parse_move(self, move):
if not move:
return None
# Parse move
try:
column = ord(move[0]) - ord('a')
row = int(move[1:]) - 1
except ValueError:
return None
except TypeError:
return None
return row, column
def is_valid_move(self, row, column, color):
self.directions_to_flip = set()
if color == LIGHT:
other_color = DARK
else:
other_color = LIGHT
# Check boundaries
if row < 0 or row > self.board_size - 1 or column < 0 or column > self.board_size - 1:
return False
# Tile must be empty
if self.board[row][column] != EMPTY:
return False
check = False
# Check E
if column + 2 < self.board_size and self.board[row][column + 1] == other_color:
for i in range(2, self.board_size - column):
if self.board[row][column + i] == EMPTY:
break
if self.board[row][column + i] == color:
check = True
self.directions_to_flip.add("E")
break
# Check W
if column - 2 >= 0 and self.board[row][column - 1] == other_color:
for i in range(2, column + 1):
if self.board[row][column - i] == EMPTY:
break
if self.board[row][column - i] == color:
check = True
self.directions_to_flip.add("W")
break
# Check S
if row + 2 < self.board_size and self.board[row + 1][column] == other_color:
for i in range(2, self.board_size - row):
if self.board[row + i][column] == EMPTY:
break
if self.board[row + i][column] == color:
check = True
self.directions_to_flip.add("S")
break
# Check N
if row - 2 >= 0 and self.board[row - 1][column] == other_color:
for i in range(2, row + 1):
if self.board[row - i][column] == EMPTY:
break
if self.board[row - i][column] == color:
check = True
self.directions_to_flip.add("N")
break
# Check SE
if row + 2 < self.board_size and column + 2 < self.board_size and self.board[row + 1][column + 1] == other_color:
for i in range(2, min(self.board_size - row, self.board_size - column)):
if self.board[row + i][column + i] == EMPTY:
break
if self.board[row + i][column + i] == color:
check = True
self.directions_to_flip.add("SE")
break
# Check NE
if row - 2 >= 0 and column + 2 < self.board_size and self.board[row - 1][column + 1] == other_color:
for i in range(2, min(row + 1, self.board_size - column)):
if self.board[row - i][column + i] == EMPTY:
break
if self.board[row - i][column + i] == color:
check = True
self.directions_to_flip.add("NE")
break
# Check NW
if row - 2 >= 0 and column - 2 >= 0 and self.board[row - 1][column - 1] == other_color:
for i in range(2, min(row + 1, column + 1)):
if self.board[row - i][column - i] == EMPTY:
break
if self.board[row - i][column - i] == color:
check = True
self.directions_to_flip.add("NW")
break
# Check SW
if row + 2 < self.board_size and column - 2 >= 0 and self.board[row + 1][column - 1] == other_color:
for i in range(2, min(self.board_size - row, column + 1)):
if self.board[row + i][column - i] == EMPTY:
break
if self.board[row + i][column - i] == color:
check = True
self.directions_to_flip.add("SW")
break
return check
def update_board(self, row, column, color):
self.board[row][column] = color
score = 0
if "S" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row + i][column] != color:
self.board[row + i][column] = color
score += 1
else:
break
if "E" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row][column + i] != color:
self.board[row][column + i] = color
score += 1
else:
break
if "N" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row - i][column] != color:
self.board[row - i][column] = color
score += 1
else:
break
if "W" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row][column - i] != color:
self.board[row][column - i] = color
score += 1
else:
break
if "SE" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row+i][column + i] != color:
self.board[row+i][column + i] = color
score += 1
else:
break
if "NE" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row-i][column + i] != color:
self.board[row-i][column + i] = color
score += 1
else:
break
if "SW" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row+i][column - i] != color:
self.board[row+i][column - i] = color
score += 1
else:
break
if "NW" in self.directions_to_flip:
for i in range(1, self.board_size):
if self.board[row-i][column - i] != color:
self.board[row-i][column - i] = color
score += 1
else:
break
return score
#######################################################################
class ReversiPlayer:
score = None
lost_turns = None
color = None
name = None
executable_path = None
executable = None
timer = None
stdoutput = None
total_time = 0
def __init__(self, color, name, executable_path):
self.score = 2
self.lost_turns = 0
if color == DARK:
self.lost_turns = -1
self.color = color
self.name = name
self.executable_path = executable_path
def kill(self):
if self.timer:
self.timer.cancel()
try:
pid = int(self.executable.pid)
except:
pass
# Find process children (if any) and kill them
try:
for child in psutil.Process(pid).children(recursive = True):
try:
os.kill(child.pid, signal.SIGTERM)
except:
pass
except:
pass
try:
self.executable.stdin.close()
except:
pass
try:
self.executable.kill()
except:
pass
try:
self.executable.terminate()
except:
pass
try:
os.kill(pid, signal.SIGTERM)
except:
pass
try:
self.stdoutput.close()
except:
pass
# Execute the program of the player
def execute(self, board_size):
try:
# Call executable
argument_list = ["-n", str(board_size)]
# If the program is going to be the dark player we need to pass the -l argument
if self.color == DARK:
argument_list.append("-l")
self.executable = subprocess.Popen([self.executable_path] + argument_list, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
self.stdoutput = open(str(self.name) + ".out", "w")
except:
print("Error: Could not execute %s (%s player)" % (self.executable_path, self.name))
if self.color == DARK:
kill_game(LIGHT)
else:
kill_game(DARK)
# Start timer for player's next move
def start_timer(self):
# If the time limit is reached, terminate the game and have the other player win
self.timer = threading.Timer(TIME, terminate_game, [self.color])
self.timer.setDaemon(True)
self.timer.start()
# Stop timer for player's next move
def stop_timer(self):
self.timer.cancel()
self.timer.join()
# Player lost their turn
def lost_turn(self):
self.lost_turns += 1
# Get and parse the player's next move
def get_next_move(self, other_player_lost_turns):
move = None
# Log time to print how much time it took to get the next move
time_begin = time.time()
# Start timer
self.start_timer()
counter = 0
# Keep reading from the pipe until the current player's move is processed
while True:
line = self.executable.stdout.readline()
try:
self.stdoutput.write(str(line.decode("utf-8")))
self.stdoutput.flush()
except:
return GAMEOVER, None
if MOVE_REGEX.match(line):
if other_player_lost_turns > 0:
move = str(line[:-1])
break
counter += 1
if counter == 2 + self.lost_turns:
move = str(line[:-1])
break
# Stop timer when move is accepted
self.stop_timer()
time_end = time.time()
move_time = time_end - time_begin
self.total_time += move_time
# if self.total_time > TOTAL_TIME_LIMIT:
# print("Error: %s player reached the total time limit of 2 minutes per game" % self.name)
# print("Game over!")
# if self.color == DARK:
# print("Light player wins!")
# kill_game(LIGHT)
# else:
# print("Dark player wins!")
# kill_game(DARK)
# Reset lost turn counter
self.lost_turns = 0
try:
move_temp = move.split()[2]
if move_temp == ":":
move = move.split()[3][:-1]
else:
if sys.version_info[0] == 2:
move = move_temp
else:
move = move_temp[:-1]
except IndexError:
print("Error: Wrong format of move: %s" % move)
return None, None
return move, move_time
def send_next_move(self, move):
try:
if sys.version_info[0] == 2:
self.executable.stdin.write("%s\n" % move)
else:
self.executable.stdin.write(bytes("%s\n" % move, "UTF-8"))
self.executable.stdin.flush()
except ValueError:
terminate_game2(self.color)
#######################################################################
reversi = None
def main():
global reversi
print("Reversi referee")
print("Created by Theodore Georgiou for the Artificial Intelligence course, UC Santa Barbara, Winter 2016")
print("--------------------\n")
if len(sys.argv) <= 3:
print("Usage: You need to provide three arguments, the size of the board and the paths to the two executables (light and dark player)")
sys.exit(0)
board_size = int(sys.argv[1])
if board_size % 2 != 0 or board_size < 4 or board_size > 26:
print("Error: Board size must be an even integer between 4 and 26")
sys.exit(0)
print("Board size: %d" % board_size)
light_executable_path = sys.argv[2]
if not os.path.exists(light_executable_path) or not os.access(light_executable_path, os.X_OK):
print("Error: File %s does not exist or is not executable (light player)" % light_executable_path)
sys.exit(0)
print("Path to the executable of the light player: %s" % light_executable_path)
dark_executable_path = sys.argv[3]
if not os.path.exists(dark_executable_path) or not os.access(dark_executable_path, os.X_OK):
print("Error: File %s does not exist or is not executable (dark player)" % dark_executable_path)
sys.exit(0)
print("Path to the executable of the dark player: %s" % dark_executable_path)
dark_player = ReversiPlayer(DARK, "Dark", dark_executable_path)
light_player = ReversiPlayer(LIGHT, "Light", light_executable_path)
reversi = ReversiGame(board_size, dark_player, light_player)
reversi.start_game()
# Start gameplay
try:
current_player = light_player # Set to light player so it switches to dark in the first turn
while True:
# Swap players in every turn
if current_player == light_player:
current_player = dark_player
other_player = light_player
else:
current_player = light_player
other_player = dark_player
if reversi.player_has_valid_moves(current_player.color):
print("%s player's turn" % current_player.name)
move, move_time = current_player.get_next_move(other_player.lost_turns)
if move == GAMEOVER:
time.sleep(1)
return
if reversi.parse_move(move):
row, column = reversi.parse_move(move)
else:
print("Error: %s player tried an invalid move (%s)" % (current_player.name, move))
print("Game over!")
print("%s player wins!" % other_player.name)
kill_game(other_player.color)
if not reversi.is_valid_move(row, column, current_player.color):
print("Error: %s player tried an invalid move (%s)" % (current_player.name, move))
print("Game over!")
print("%s player wins!" % other_player.name)
kill_game(other_player.color)
print("%s player's move: %s (within %.2f seconds)" % (current_player.name, move, move_time))
reversi.apply_move(row, column, current_player.color)
reversi.print_board()
reversi.print_score()
if reversi.is_game_over():
other_player.send_next_move(move)
break
# Send current player's move to the other player
other_player.send_next_move(move)
else:
print("%s player has no valid moves" % current_player.name)
current_player.lost_turn()
except KeyboardInterrupt:
print("Error: KeyboardInterrupt captured")
kill_game(0)
#except:
# print("Error: Unexpected exception occurred")
# kill_game()
print("Game over!")
reversi.print_results()
def terminate_game(color):
print("Error: Current player takes too long to decide on their next move (%d seconds passed)" % TIME)
print("Game over!")
if color == DARK:
print("Light player wins!")
kill_game(LIGHT)
else:
print("Dark player wins!")
kill_game(DARK)
def terminate_game2(color):
print("Error: Next player is not responsive")
print("Game over!")
if color == DARK:
print("Light player wins!")
kill_game(LIGHT)
else:
print("Dark player wins!")
kill_game(DARK)
def kill_game(color):
print("Exiting...")
reversi.dark_player.kill()
reversi.light_player.kill()
sys.stdout.flush()
sys.stderr.flush()
os._exit(color)
if __name__ == "__main__":
try:
main()
except:
print(traceback.format_exc())