#Import Functions
from tkinter import * #tkinter library
import random #random number generator library
import time #time library 

#Create a window
tk = Tk()
tk.title('Game')
tk.resizable(0, 0) # fixed at a point
tk.wm_attributes('-topmost', 1) #Window Manager
                                #Sets canvas as "topmost" window
canvas = Canvas(tk, width = 500, height = 400, bd = 0, highlightthickness = 0)
#Creates Canvas; varriables passed: Tk window,
canvas.pack() # Tells the canbas to size itself according to the preceding line
tk.update() # Tells the canvas to initiallize itself

class Ball: #Creates a class for ball; parameters: canbas and color of ball
    def __init__(self, canvas, paddle, color):
        self.canvas = canvas #Saves canvas as an object
        self.paddle = paddle
        self.id = canvas.create_oval(10, 10, 25, 25, fill = color)
        #All object ID values are simple integers, and the object ID of an object
        #is unique within that canvas.
        self.canvas.move(self.id, 245, 100)
        #self.x = 0
        #self.y = -1
        starts = [-3, -2, -1, 1, 2, 3]
        random.shuffle(starts)
        self.x = starts[0]
        self.y = -3
        self.canvas_height = self.canvas.winfo_height()
        self.canvas_width = self.canvas.winfo_width()
        self.hit_bottom = False

    def draw(self):
        #self.canvas.move(self.id, 0, -1)
        self.canvas.move(self.id, self.x, self.y)
        pos = self.canvas.coords(self.id)

        if pos[1] <= 0:
            self.y = 1
        if self.hit_paddle(pos) == True:
            self.y = -1
        if pos[3] >= self.canvas_height:
            self.hit_bottom = True
        if pos[0] <= 0:
            self.x = 1
        if pos[2] >= self.canvas_width:
            self.x = -1

    def hit_paddle(self, pos):
        paddle_pos = self.canvas.coords(self.paddle.id)
        if pos[2] >= paddle_pos[0] and pos[0] <= paddle_pos[2]:
            if pos[3] >= paddle_pos[1] and pos[3] <= paddle_pos[3]:
                return True
        return False


class Paddle:
    def __init__(self, canvas, color):
        self.canvas = canvas
        self.id = canvas.create_rectangle(0, 0, 100, 10, fill = color)
        self.canvas.move(self.id, 200, 300)
        self.x = 0
        self.canvas_width = self.canvas.winfo_width()
        self.canvas.bind_all('<KeyPress-Left>', self.turn_left)
        self.canvas.bind_all('<KeyPress-Right>', self.turn_right)

    def turn_left(self, evt):
        self.x = -2

    def turn_right(self, evt):
        self.x = 2
        
    def draw(self):
        self.canvas.move(self.id, self.x, 0)
        pos = self.canvas.coords(self.id)
        if pos[0] <= 0:
            self.x = 0
        if pos[2] >= self.canvas_width:
            self.x = 0
       
def main():
    paddle = Paddle(canvas, 'blue')
    ball = Ball(canvas, paddle, 'red')
    while True:
        if ball.hit_bottom == False:
            ball.draw()
            paddle.draw()
    tk.update_idletasks()
    tk.update()
    time.sleep(0.01)
       
main()
        
