import network
import networkconfig
import time
wlan_sta = network.WLAN(network.STA_IF)

def do_connect(ntwrk_ssid, netwrk_pass):
	sta_if = network.WLAN(network.STA_IF)
	sta_if.active(True)
	if not sta_if.isconnected():
		print('try to connect : '+ntwrk_ssid+' network...')
		sta_if.active(True)
		sta_if.connect(ntwrk_ssid, netwrk_pass)
		a=0
		while not sta_if.isconnected() | (a > 99) :
			time.sleep(0.1)
			a+=1
			print('.', end='')
		if sta_if.isconnected():
			print('\nConnected. Network config:', sta_if.ifconfig())
			return (True)
		else : 
			print('\nProblem. Not Connected to :'+ntwrk_ssid)
			return (False)

def check_connection ():			
	global wlan_sta
	# Firstly check is there any connection 
	if wlan_sta.isconnected():
		return (True)
	try:
		# connection of ESP to WiFi takes time 
		# wait 3 sec. and try again. 
		time.sleep(3)
		if not wlan_sta.isconnected():
			# inside passwd file. there are list of WiFi network CSV file
			f = open("passwd.dat")
			data = f.readlines()
			f.close()
			# Search WiFi's in range 
			ssids_found = wlan_sta.scan()
			
			# matching... 
			for ipass in data:
				ssid_list= ipass.strip("\n").split(";")
								
				for i in ssids_found:
					if ssid_list[0] in i[0]:
						print ("OK. WiFi is Founded")
						if do_connect(ssid_list[0],ssid_list[1]):
							return (True)
		
			if not wlan_sta.isconnected():
				if networkconfig.start():
					return (True)
		else:
			return (True)
		
	except OSError:
		# Web server for connection manager
		if networkconfig.start():
			return (True)
	
	return (False)
	
if check_connection ():
	
	# Main Code is here
	print ("ESP OK")
	# to import your code;
	# import sample_mqtt.py

else:
	print ("There is something wrong")