'''lecture_10_random_walk.py
Have 3 turtles walk around randomly with their unique properties
Oliver W. Layton
CS 151: Computational Thinking: Visual Media
Fall 2020
TODO: Move the screen creation and customization to a make_screen function
'''
import turtle
import random


def make_screen(height, width):
    '''
    Return: a Screen object
    '''
    '''Screen'''
    # call Screen's constructor to make a new pop-up window/canvas
    screen = turtle.Screen()

    # Control how big we want it
    screen.setup(height=height, width=width)

    return screen


# main code
# height = 600
# width = 800
# screen = make_screen(height, width)
my_screen = make_screen(800, 600)

# Make turtles (turtle shape) and customize their properties (e.g. color)
turtle1 = turtle.Turtle()
turtle2 = turtle.Turtle()
turtle3 = turtle.Turtle()

turtle1.pencolor('blue')
turtle2.pencolor('green')
turtle3.pencolor('red')

turtle1.shape('turtle')
turtle2.shape('turtle')
turtle3.shape('turtle')

turtle1.speed(0)
turtle2.speed(0)
turtle3.speed(0)

# Make turtles move randomly 1000 times.
numSteps = 1000
for i in range(numSteps):
    # Change their direction (randomly) every 10 movements
    if i % 10 == 0:
        turtle1.right(random.randint(0, 360))
        turtle2.setheading(360*random.random())
        turtle3.setheading(360*random.random())
    
    # Move them forward a random amount (1-3 pixels)
    turtle1.forward(random.randint(1, 3))
    turtle2.forward(2*random.random() + 1)
    turtle3.forward(2*random.random() + 1)
    
my_screen.exitonclick()