import turtle
import time
import random

delay = 0.08
speed = 10

screen = turtle.Screen()
screen.bgcolor("black")
screen.setup(width=600, height=600)
screen.tracer(0)

def drawCharacter(colour, shape):
  character = turtle.Turtle()
  character.penup()
  character.speed(0)
  character.shape(shape)
  character.color(colour)
  return character

head = drawCharacter("green", "square")
head.direction = "stop"
head.goto(0, 0)

food = drawCharacter("yellow", "circle")
food.goto(0, 100)
snakeBody = []

#-----------------------------------------Exercise 5.A Start--------------------------#


#---------------------------------------- Exercise 5.A End----------------------------#

#--------------Exercise 2 Start--------------------------------------------------------#
#Pass is just a placeholder so the program can still run before you write your code
def move():
    # A function to move the turtle
    if head.direction == "up":
      pass
    elif head.direction == "down":
      pass
    elif head.direction == "left":
      pass
    elif head.direction == "right":
      pass
#--------------Exercise 2 End-----------------------------------------------------#

#--------------Exercise 3 Start--------------------------------------------------------#
def goUp():
    pass

def goDown():
    pass

def goLeft():
    pass

def goRight():
    pass

#--------------Exercise 3 End----------------------------------------------------------#

def gameStop():
    time.sleep(1)
    head.goto(0, 0)
    head.direction = "stop"
    for part in snakeBody:
      part.goto(1000, 1000)
      # Send all the body parts off screen before clearing them
    snakeBody.clear()
      # This will clear all the turtles in the "snakeBody" list.
    # Resetting the score (Something might need to be put here :D)

# When the player presses a button, this will run a particular function depending
# on which button is pressed
screen.listen()
# Notice that this "screen" variable is the same one used at the start
screen.onkeypress(goUp, 'w')
screen.onkeypress(goDown, 's')
screen.onkeypress(goLeft, 'a')
screen.onkeypress(goRight, 'd')


while True:
    screen.update()
      # Every iteration of this loop will update the screen. Since this loop is
      # always running, the screen will keep updating
    time.sleep(delay)
      # This will stop the program for "delay" seconds. What is "delay"?

#--------------------------------------Exercise 4 Start----------------------------------#




#--------------------------------------Exercise 4 End----------------------------------#
    #Managing the movement of the food
    # First we need to see if the snake has made contact with the food
    if head.distance(food) < 20: # Each turtle is 20 pixels wide. The "distance()"
                                 # function compares the centres of each turtle.
      x = random.randint(-290, 290)
      y = random.randint(-290, 290)
          # Generating random x and y co-ordinates for the food
      food.goto(x, y)

      # PART 8 CONT.
          # Creating the new body part
      newBodyPart = drawCharacter("white", "square")
      newBodyPart.penup()

      # Now we need to add the new body part onto the rest of the snake
      snakeBody.append(newBodyPart)
      # We want the snake body parts to follow the head of the snake as it moves
    for index in range(len(snakeBody) - 1, 0, -1): # Note that index 0 is not included in this loop:
                                                   # this is intentional
      # Send each body part to follow the one in front of it, starting from the tail
      x = snakeBody[index - 1].xcor()
      y = snakeBody[index - 1].ycor()
      snakeBody[index].goto(x, y)
    # Since the for loop doesn't include the "0th" body part, we will deal with it here
    if len(snakeBody) > 0: # We have to make sure a body part other than the head exists first
      x = head.xcor()
      y = head.ycor()
      snakeBody[0].goto(x, y)
    move()