CSC1002_5

from turtle import Turtle, Screen, mainloop
import turtle
import random
import math
import time
head=Turtle()
screen=Screen()
tails=Turtle()
monster=Turtle()
text=Turtle()
food=Turtle()
KEY_UP,KEY_DOWN,KEY_LEFT,KEY_RIGHT="Up","Down","Left","Right"

#global variable:
pausing=True
gameReady=False
eating=False
caught=False
food_x=[]
food_y=[]
food_q=[]



def setWrite():
    text.up()
    text.setpos(-245,225)
    text.write("Welcom to Fenny's snake game",move=False, align="left", font=("Arial", 10, "normal"))
    text.setpos(-245,205)
    text.write("You are going to use the four arrow keys to move the head around the the screen",\
        move=False, align="left", font=("Arial", 10, "normal"))
    text.setpos(-245,185)
    text.write("trying to consume all the food items before the monster catches you... ",\
    move=False, align="left", font=("Arial", 10, "normal"))
    text.setpos(-245,165)
    text.write("Click anywhere on the screen to start the game,have fun!",\
    move=False, align="left", font=("Arial", 10, "normal"))
    text.ht()#hide the turtle

def setSnake():
    head.up()
    head.setpos(0,0)
    head.shape("square")
    head.fillcolor("red")


def setMonster():
    monster.up()
    monster.shape("square")
    monster.fillcolor("purple")
    x1=random.randint(-200,-100)
    x2=random.randint(100,200)
    x=random.random()
    if x<1/2:
        x=x1
    else:
        x=x2
    y=random.randint(-200,-100)
    monster.setpos(x,y)

def gameBegin(m,n):
    -250<=m<=250
    -250<=n<=250
    global gameReady
    global pausing
    if (gameReady):
        pausing=False
        screen.onscreenclick(None)

def setFood():
    global food_q
    global food_x
    global food_y
    for i in range(1,10):
        x=int(220*random.random())
        c=random.random()
        if c<1/2:
            x=(-1)*x
        y=int(220*random.random())
        d=random.random()
        if d<1/2:
            y=(-1)*y
        food.up()
        food.ht()
        food.setpos(x,y)
        food.write(i)
        food_x.append(x)
        food_y.append(y)
        food_q.append(i)







#main
#set Screen
screen.setup(width=500, height=500, startx=None, starty=None)
turtle.title("Fenny's Game")
setWrite()
setSnake()
setMonster()
gameReady=True #前面默认设置完成
screen.onscreenclick(gameBegin)
while True:#停在第一个界面直到click（限制在这个循环中）
    if (pausing):
        pass
    else:
        break
text.clear()
setFood()
turtle.title("Snake")



screen.listen()
screen.mainloop()