# myEtchASketch application from Coding Club: Python Basics

from tkinter import *
import math

##### Set variables:
canvas_height = 400
canvas_width = 600
canvas_colour = "black"
p1_x=canvas_width/2
p1_y=canvas_height
p1_colour="green"
line_width=5
line_length=5

##### Logo mode variables:
heading=0
x2=p1_x
y2=p1_y

##### Functions:

# player controls
def p1_move_N(self):
    global p1_y
    canvas.create_line(p1_x, p1_y, p1_x, (p1_y-line_length), width=line_width, fill=p1_colour)
    p1_y = p1_y - line_length

def p1_move_S(self):
    global p1_y
    canvas.create_line(p1_x, p1_y, p1_x, p1_y+line_length, width=line_width, fill=p1_colour)
    p1_y = p1_y + line_length

def p1_move_E(self):
    global p1_x
    canvas.create_line(p1_x, p1_y, p1_x + line_length, p1_y, width=line_width, fill=p1_colour)
    p1_x = p1_x + line_length

def p1_move_W(self):
    global p1_x
    canvas.create_line(p1_x, p1_y, p1_x - line_length, p1_y, width=line_width, fill=p1_colour)
    p1_x = p1_x - line_length

def erase_all(self):
    canvas.delete(ALL)

# Logo mode functions:

def logo_command(self):
    global heading
    global x2
    global y2
    heading = int(input("What heading would you like to set? "))
    distance = int(input("How far - how many pixels? "))
    total_distance = distance * line_length
    if heading < 91:
        heading_rads = heading / 57.32
        x2 = p1_x + math.sin(heading_rads) * distance
        y2 = p1_y - math.cos(heading_rads) * distance
    elif heading >90 and heading <181:
        heading = heading - 90
        heading_rads = heading / 57.32
        x2 = p1_x + math.cos(heading_rads) * distance
        y2 = p1_y + math.sin(heading_rads) * distance
    elif heading >180 and heading <271:
        heading = heading - 180
        heading_rads = heading / 57.32
        x2 = p1_x - math.sin(heading_rads) * distance
        y2 = p1_y + math.cos(heading_rads) * distance
    elif heading >270:
        heading = heading - 270
        heading_rads = heading / 57.32
        x2 = p1_x - math.cos(heading_rads) * distance
        y2 = p1_y - math.sin(heading_rads) * distance
    print (math.sin(heading_rads))
    print (math.cos(heading_rads))
    print ("x-move = ", x2-p1_x)
    print ("y-move = ", y2-p1_y)

def draw_line(self):
    global p1_x
    global p1_y
    canvas.create_line(p1_x, p1_y, x2, y2, width=line_width, fill=p1_colour)
    p1_x = x2
    p1_y = y2                              
    

##### main:
window = Tk()
window.title("MyEtchaSketch - MiniLogo - Press l for Logo...")
canvas = Canvas(bg=canvas_colour, height=canvas_height, width=canvas_width, highlightthickness=0)
canvas.pack()

# bind movement to key presses
window.bind("<Up>", p1_move_N)
window.bind("<Down>", p1_move_S)
window.bind("<Left>", p1_move_W)
window.bind("<Right>", p1_move_E)
window.bind("u", erase_all)

# Logo mode:
window.bind("l", logo_command)
window.bind("d", draw_line)

window.mainloop()