#this import statement allows access to the karamba functions
import karamba

#import os
import string
import math
import re

import xcursor

linkePupille = ""
rechtePupille = ""

init = 0

#old curser pos
x_old = -1
y_old = -1

#widget size
w_width  = 167
w_height = 111

#widget pos
w_x = 10
w_y = 850

#eye center
lx, ly = 39, 55
rx, ry = 126, 55

#eye size
la, lb = 25, 38
ra, rb = 25, 38

#pupille size
lp_width, lp_height = 11, 17
rp_width, rp_height = 11, 17

def pupille(mouse_x, mouse_y, eye_center_x, eye_center_y, eye_a, eye_b, widget_x, widget_y):
    x = mouse_x - eye_center_x - widget_x
    y = mouse_y - eye_center_y - widget_y
    #print(x, y)

    r = math.sqrt(x * x + y * y)
    phi = math.atan2(y, x)
    #print(phi * math.pi)

    eye_x = eye_a * math.cos(phi)
    eye_y = eye_b * math.sin(phi)
    
    eye_r = math.sqrt(eye_x * eye_x + eye_y * eye_y)

    if eye_r < r:
        return int(eye_x + eye_center_x), int(eye_y + eye_center_y)
    
    return int(x + eye_center_x), int(y + eye_center_y)

    
#this is called when you widget is initialized
def initWidget(widget):
    global init
    global linkePupille
    global rechtePupille
    init = 0
    linkePupille = ""
    rechtePupille = ""

#this is called everytime your widget is updated
#the update inverval is specified in the .theme file
def widgetUpdated(widget):
    global init
    global linkePupille
    global rechtePupille
    
    global w_width
    global w_height

    global w_x
    global w_y

    global lx
    global ly
    global la
    global lb

    global lp_width
    global lp_height

    global rx
    global ry
    global ra
    global rb

    global rp_width
    global rp_height

    global x_old
    global y_old

    if init == 0:
        theme_path = karamba.getThemePath(widget) + "/"
        
        # read widget coordinates from eyes.theme
        # f = open(theme_path + "eyes.theme")

        # karamba_line = ""
        #while re.compile('KARAMBA').search(karamba_line) == None:
        #     karamba_line = f.readline()

        #w_x = int(re.compile('X=([0-9]+)').search(karamba_line).group(1))
        #w_y = int(re.compile('Y=([0-9]+)').search(karamba_line).group(1))

        #f.close()

        #karamba.createWidgetMask(widget, theme_path + "pics/mask.png")

        linkePupille = karamba.createImage(widget, 15, 30, theme_path + "pics/pupille.png")
        rechtePupille = karamba.createImage(widget, 100, 30, theme_path + "pics/pupille.png")    
        init = 1

        karamba.redrawWidget(widget)

    # query mouse-cursor position
    x, y = xcursor.position()
    
    #fp = os.popen("./xpos")
    #output = fp.read()
    #x, y = output.split()
    
    #print(x, y)

    if x != x_old or y != y_old:        
        x_old, y_old = x, y
        # Get Widget Position
        w_x, w_y = karamba.getWidgetPosition(widget)

        # Calc left pupille
        xp, yp = pupille (int(x), int(y), lx, ly, la, lb, w_x, w_y)

        xp = xp - lp_width // 2
        yp = yp - lp_height // 2
        #print(xp, yp)

        karamba.moveImage(widget, linkePupille, xp, yp)

        # Calc right pupille
        xp, yp = pupille (int(x), int(y), rx, ry, ra, rb, w_x, w_y)

        xp = xp - rp_width // 2
        yp = yp - rp_height // 2
        #print(xp, yp)

        karamba.moveImage(widget, rechtePupille, xp, yp)

        karamba.redrawWidget(widget)

#This gets called everytime our widget is clicked.
#Notes:
#  widget = reference to our widget
#  x = x position (relative to our widget)
#  y = y position (relative to our widget)
#  botton = button clicked:
#                    1 = Left Mouse Button
#                    2 = Middle Mouse Button
#                    3 = Right Mouse Button, but this will never happen
#                        because the right mouse button brings up the
#                        Karamba menu.
#                    4,5 = Scroll wheel up and down
def widgetClicked(widget, x, y, button):
    pass

#This gets called everytime our widget is clicked.
#Notes
#  widget = reference to our widget
#  x = x position (relative to our widget)
#  y = y position (relative to our widget)
#  botton = button being held:
#                    0 = No Mouse Button
#                    1 = Left Mouse Button
#                    2 = Middle Mouse Button
#                    3 = Right Mouse Button, but this will never happen
#                        because the right mouse button brings up the
#                        Karamba menu.
def widgetMouseMoved(widget, x, y, button):
    #Warning:  Don't do anything too intensive here
    #You don't want to run some complex piece of code everytime the mouse moves
    pass
    #global linkePupille

    #karamba.moveImage(widget, linkePupille, x, y)
    #karamba.redrawWidget(widget)


# This will be printed when the widget loads.
print("Loaded Karamba Eyes")