#!/usr/bin/env python3

import os
import subprocess
import threading

import argparse

from xmlrpc.client import *


'''
USAGE:

lmd-remote-chroot-launcher -host remote_ip -ip local_ip -chroot chroot_name -u username -p password -c command
------- local_ip pot obtindre's automaticament???
'''

def get_first_display_free():
	'''
	Returns firs Display free from 42
	'''
	try:
		display=42
		while(os.path.isfile('/tmp/.X'+str(display)+'-lock')):
			# There is lock file... is it in use?
			print(("File "+'/tmp/.X'+str(display)+'-lock'+" exists"))
			f = open('/tmp/.X'+str(display)+'-lock', 'r')
			for line in f:
				if (os.path.exists("/proc/"+line.strip())):
					print(("Any process is running on :"+str(display)))
					# check another display
					display=display+1
				else:
					print("No process locking file, remove lock file")
					os.remove('/tmp/.X'+str(display)+'-lock')
					# Return removed display
					return ":"+str(display)
			return ":"+str(display)
	except Exception as e:
		print("Captured: "+str(e))
		return {'status': False, 'msg':'[LTSPX11Environment] '+str(e)}
	return ":42"

parser = argparse.ArgumentParser(description='Execute X command into a chroot on a server.')
parser.add_argument('-host', help='Server address')
parser.add_argument('-chroot', help='chroot')
parser.add_argument('-u', help='Server Usernane')
parser.add_argument('-p', help='Server Password')
parser.add_argument('-c', help='command to perform')
parser.add_argument('-ip', help='Locap IP') ## IP

args = parser.parse_args()
host=args.host
username=args.u
password=args.p
chroot=args.chroot

ip=args.ip

# Prepare environment

my_env=dict(os.environ)
print(my_env);

try:
	print("<<<<<"+my_env['XAUTHORITY'])
except Exception:
	# Xauthority is not defined...
	my_env['XAUTHORITY']="~/.Xauthority"


display=get_first_display_free();

print(display)


## Continue FROM ltspClientXServer.py...