import sys
import subprocess
import os
import __main__
import i3
import time

#Check if already running
def isOnlyInstance():
    return os.system("(( $(ps -ef | grep python | grep '[" + __main__.__file__[0] + "]" + __main__.__file__[1:] + "' | wc -l) > 1 ))") != 0

#Determine nodes of selected container
def focusedNodes():
		nodes = i3.filter(focused=True)[0]['nodes']

		for node in nodes:
			if(len(node['nodes']) > 0):
				nodes.remove(node)
				for i in node['nodes']:
					nodes.append(i)
		return nodes

#Only one instance allowed
if(isOnlyInstance()):

	oldNodes = []
	nodes = focusedNodes()

	#Keep running as long as more than one window in container
	while( len(nodes) > 0):
		nodes = focusedNodes()

		#Action needed when number of windows changed
		if(len(nodes) != len(oldNodes)):
			if(len(nodes) > len(oldNodes)):
				temp = [item for item in nodes if item not in oldNodes]
				for node in temp: #set opacity for all windows
					subprocess.call(['compton-trans','-w',str(node['window']),'-o', '50'])
			else:
				temp = [item for item in oldNodes if item not in nodes]
				for node in temp:
					subprocess.call(['compton-trans','-w',str(node['window']),'-o','100'])
			oldNodes = nodes
		time.sleep(.1)

	#Only one window selected, so reset to default compton profile
	subprocess.call(['compton-trans','--reset'])