import turtle
from tkinter import messagebox

# 设置屏幕和画笔
screen = turtle.Screen()
screen.title("简易井字棋")
pen = turtle.Turtle()
pen.hideturtle()
pen.speed(0)
pen.pensize(3)

current_player = "X"
board = [["" for _ in range(3)] for _ in range(3)]

def draw_board():
    for i in range(1, 3):  # 竖线
        pen.penup()
        pen.goto(-150 + i * 100, -150)
        pen.pendown()
        pen.goto(-150 + i * 100, 150)
    for i in range(1, 3):  # 横线
        pen.penup()
        pen.goto(-150, -150 + i * 100)
        pen.pendown()
        pen.goto(150, -150 + i * 100)

def draw_symbol(row, col, symbol):
    x = -100 + col * 100
    y = 70 - row * 100
    pen.penup()
    pen.goto(x, y)
    pen.write(symbol, align="center", font=("Arial", 36, "bold"))

def check_win(player):
    # 检查行
    for r in range(3):
        if all(board[r][c] == player for c in range(3)):
            return True
    # 检查列
    for c in range(3):
        if all(board[r][c] == player for r in range(3)):
            return True
    # 检查对角线
    if all(board[i][i] == player for i in range(3)):
        return True
    if all(board[i][2 - i] == player for i in range(3)):
        return True
    return False

def check_draw():
    return all(board[r][c] != "" for r in range(3) for c in range(3))

def click(x, y):
    global current_player
    if not (-150 < x < 150 and -150 < y < 150):
        return
    col = int((x + 150) // 100)
    row = int((150 - y) // 100)
    if board[row][col] == "":
        board[row][col] = current_player
        draw_symbol(row, col, current_player)

        if check_win(current_player):
            messagebox.showinfo("游戏结束", f"玩家 {current_player} 获胜！")
            screen.bye()  # 关闭窗口
            return
        elif check_draw():
            messagebox.showinfo("游戏结束", "平局！")
            screen.bye()
            return

        current_player = "O" if current_player == "X" else "X"

draw_board()
screen.onclick(click)
screen.mainloop()