195 lines
7.6 KiB
Python
195 lines
7.6 KiB
Python
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from os import path
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from enum import Enum, auto
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import time
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from cinput import ControlInput, Button
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from graphics import Graphics
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from .draw import Draw
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from . import sunfish
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from . import util
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class GameState(Enum):
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MAIN_MENU = auto()
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THINKING = auto()
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CHOOSE_SRC = auto()
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CHOOSE_DST = auto()
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GAME_OVER = auto()
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class ChessGame:
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SAVE_FILE = path.join("data", "chess_state.fen")
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MAX_THINKING_SECONDS = 3
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def __init__(self, cinput: ControlInput, graphics: Graphics):
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self._cinput = cinput
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self._draw = Draw(graphics)
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self._state = GameState.MAIN_MENU
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self._menu_index = 0
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self._searcher = sunfish.Searcher()
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def _init_new_game(self, pos: sunfish.Position):
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self._hist = [pos]
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self._last_move = "Begin!"
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self._all_moves = dict()
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self._src_idx = 0
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self._dst_idx = 0
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self._draw.draw_board(self._hist[-1], self._player_color)
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def _load_saved_or_init(self):
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if path.exists(self.SAVE_FILE):
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with open(self.SAVE_FILE, "r") as fen:
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fenstr = fen.read()
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pos = util.parseFEN(fenstr)
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self._player_color = util.get_color(pos)
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self._init_new_game(pos)
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else:
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self._player_color = "w"
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self._init_new_game(sunfish.Position(
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sunfish.initial, 0, (True,True), (True,True), 0, 0))
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def _save_game(self):
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with open(self.SAVE_FILE, "w") as fen:
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fen.write(util.renderFEN(self._hist[-1]))
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def run(self):
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# either load the save game or start a new one
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self._load_saved_or_init()
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while True:
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key = None
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move = None
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src = ""
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################
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# HANDLE STATE #
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################
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# draw menu
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if self._state == GameState.MAIN_MENU:
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self._draw.draw_menu(self._menu_index)
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key = self._cinput.get_one_shot()
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# computer makes a move
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elif self._state == GameState.THINKING:
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self._draw.draw_thinking(self._last_move)
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start = time.time()
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for _, self._move, self._score in self._searcher.search(
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self._hist[-1], self._hist):
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if time.time() - start > self.MAX_THINKING_SECONDS:
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break
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self._hist.append(self._hist[-1].move(self._move))
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self._draw.draw_board(self._hist[-1], self._player_color)
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self._last_move = util.move_str(move, self._player_color == "w")
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# reset user moves and move state to user's turn
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self._all_moves = dict()
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self._state = GameState.CHOOSE_SRC
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# user picks source piece
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elif self._state == GameState.CHOOSE_SRC:
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if len(list(self._all_moves)) == 0:
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self._all_moves = util.get_all_moves(self._hist[-1])
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src = list(self._all_moves)[self._src_idx]
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self._draw.draw_select(self._last_move, src)
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key = self._cinput.get_one_shot()
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# user picks dest square
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elif self._state == GameState.CHOOSE_DST:
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src = list(self._all_moves)[self._src_idx]
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dst = self._all_moves[src][self._dst_idx]
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self._draw.draw_select(self._last_move, src, dst)
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key = self._cinput.get_one_shot()
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# game has ended
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elif self._state == GameState.GAME_OVER:
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key = self._cinput.get_one_shot()
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################
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# HANDLE INPUT #
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################
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# handle user input on main menu
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if self._state == GameState.MAIN_MENU:
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# menu cursor up and down
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if key == Button.DIR_U:
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self._menu_index -= 1
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if self._menu_index < 0:
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self._menu_index = 0
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elif key == Button.DIR_D:
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self._menu_index += 1
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if self._menu_index > 3:
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self._menu_index = 3
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# select current menu item
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elif key == Button.BTN_B:
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if self._menu_index == 0: # play current game
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self._state = GameState.CHOOSE_SRC
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elif self._menu_index == 1: # save and quit
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self._save_game()
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return
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elif self._menu_index == 2 or self._menu_index == 3: # new game
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pos = sunfish.Position(
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sunfish.initial, 0, (True,True), (True,True), 0, 0)
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if self._menu_index == 3:
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self._player_color = "b"
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self._state = GameState.THINKING
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else:
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self._player_color = "w"
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self._state = GameState.CHOOSE_SRC
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self._init_new_game(pos)
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# TODO: figure out why I need to do this
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self._draw.draw_board(
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pos if self._player_color == "w" else pos.rotate(), self._player_color)
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# handle user input when selecting source piece
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# TODO: some kind of cursor indicator on board
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elif self._state == GameState.CHOOSE_SRC:
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# move between source pieces
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if key == Button.DIR_D or key == Button.DIR_R:
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self._src_idx += 1
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if self._src_idx >= len(self._all_moves.keys()):
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self._src_idx = 0
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elif key == Button.DIR_U or key == Button.DIR_L:
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self._src_idx -= 1
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if self._src_idx < 0:
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self._src_idx = len(list(self._all_moves)) - 1
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# back out to main menu
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elif key == Button.BTN_A:
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self._state = GameState.MAIN_MENU
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# move to destination picker
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elif key == Button.BTN_B:
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self._state = GameState.CHOOSE_DST
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# handle user input when selecting dest piece
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elif self._state == GameState.CHOOSE_DST:
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# move between dest squares for the given source
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if key == Button.DIR_D or key == Button.DIR_R:
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self._dst_idx += 1
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if self._dst_idx >= len(self._all_moves[src]):
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self._dst_idx = 0
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elif key == Button.DIR_U or key == Button.DIR_L:
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self._dst_idx -= 1
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if self._dst_idx < 0:
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self._dst_idx = len(self._all_moves[src]) - 1
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# back out to choose a different source piece
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elif key == Button.BTN_A:
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self._dst_idx = 0
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self._state = GameState.CHOOSE_SRC
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# make the move
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elif key == Button.BTN_B:
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dst = self._all_moves[src][self._dst_idx]
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# TODO: fix rotation depending on player color
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self._last_move = src + " - " + dst
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sfmove = sunfish.parse(src), sunfish.parse(dst)
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self._hist.append(self._hist[-1].move(sfmove))
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self._draw.draw_board(self._hist[-1].rotate(), self._player_color)
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self._state = GameState.THINKING
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# handle user input on game over
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else:
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if key == Button.BTN_A or key == Button.BTN_B:
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self._state = GameState.MAIN_MENU
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