#! /usr/bin/python

from serial import *
from tkinter import *
import time
#import ctypes

#Serial
ser = Serial("COM9",38400,timeout=0,writeTimeout=0)
time.sleep(1)

xPos = 500
yPos = 300

#function for making a circle
def drawcircle(canv,x,y,rad,color):
    canv.create_oval(x-rad,y-rad,x+rad,y+rad,width=0,fill=color)

def goToClick(event):
    global xPos
    global yPos
    xPos = event.x
    yPos = event.y
    #drawcircle(sketcher,xPos,yPos,5,"#8D8A8A")
    
#Main window
root = Tk() #Tk is a function that makes a class
root.wm_title("Canvas Sketch")
root.config(bg="#8D8A8A", bd="0")

sketcher = Canvas(root, width=1000, height=600, bg='white')
sketcher.grid(row=0, column=0)
sketcher.bind('<Button-1>', goToClick)

#log = Text(root, width=50, height=8, takefocus=0)
#log.grid(row=1, column=0, padx=2, pady=2)

color = 'black'
verPos = 0
horPos = 0

def runLoop(event=0):
    ln = ser.readline()
    lineStr = ln.decode(encoding='UTF-8')
    #log.insert('0.0',lineStr)
    
    #print(lineStr)
    Xline = 0
    Yline = 0
    circline = 0
    newLine = 0
    global verPos
    global horPos
    global xPos
    global yPos
    global color

    #determine selected color
    if "C" in lineStr:
        for line in lineStr.split(','):
            if "R" in line:
                color = 'red'
            if "Y" in line:
                color = 'yellow'
            if "G" in line:
                color = 'green'
            if "B" in line:
                color = 'blue'
            if "K" in line:
                color = 'black'

    #get X value
    elif "X" in lineStr:
        if len(lineStr) > 6:
            for line in lineStr.split(','):
                if Xline == 1:
                    #take value from lineStr
                    verPos = float(line.strip("\n \r"))*-1
                    #print(verPos)
                    Xline = 0
                elif Xline == 0:
                    Xline = 1

    #get Y value
    elif "Y" in lineStr:
        for line in lineStr.split(','):
            if Yline == 1:
                #take value from lineStr
                horPos = float(line.strip("\n \r"))
                #print(horPos)
                Yline = 0
                newLine = 1
            elif Yline == 0:
                Yline = 1

    #draw circle
    elif "O" in lineStr:
        if len(lineStr) > 4:
            for line in lineStr.split(','):
                if circline == 1:
                    circDiam = float(line.strip("\n \r"))
                    #draw circle
                    drawcircle(sketcher,xPos,yPos,5*circDiam,color)
                    circline = 0
                elif circline == 0:
                    circline = 1

    if newLine == 1:
        newY = yPos+5*verPos
        newX = xPos+5*horPos
        sketcher.create_line(xPos, yPos, newX, newY, fill=color, width = 2)
        xPos = newX
        yPos = newY
    
    #Something like the below will probably work, but as of now
    #these lines break the computer because the mouse becomes unusable
    #ctypes.windll.user32.SetCursorPos(100, 20)
    #ctypes.windll.user32.mouse_event(2, 0, 0, 0,0) # left down
    #ctypes.windll.user32.mouse_event(4, 0, 0, 0,0) # left up

    root.after(10, runLoop)

runLoop()

root.mainloop()