import csv,logging
from ipaddress import IPv4Address,IPv4Network
from datetime import datetime

class commands:
	def __init__(self, name, ip, mask, comment, inline = None, ObjectGroup = None):
		self.name = name
		self.ip = ip
		self.mask = mask
		self.comment =  comment
	def ASAHostObject(self):
		''' Adds ASA Host Object'''
		return f'object network {self.name} \n description {self.comment} \n host {self.ip}'
	def ASASubnetObject(self):
		''' Adds ASA Subnet Object'''
		return f'object network {self.name} \n description {self.comment} \n subnet {self.ip} {self.mask}'
	def ASA_Inline_Host(self):
		''' Addes Inline Host to Object-group '''
		return f'network-object host {self.ip}'
	def ASA_Inline_Subnet(self):
		''' Addes Inline subnet to Object-group '''
		return f'network-object network {self.ip} {self.mask}'

def CSV_Parse():
	""" This function parses and checks for errors in csv file
		If no errors in csv file, it will return PunchCard that will be  'fed' to class Commands later"""
	PunchCard = []
	with open('objectlist.csv','r') as csv_file:
		csv_reader = csv.reader(csv_file,delimiter = ',')
		next(csv_reader)
		DefaultComment = "MACD#-AL97-" + f'{datetime.now():%b-%d-%Y}'
		for Each_Row in csv_reader: #Let the parse begin
			if (len(Each_Row[0]) == 0 or len(Each_Row[1]) == 0): #Checking if "Name" and "IP" fields are not blank in csv file.
				print("Error Occured! 'Object Name' and/or 'IP' fields cannot be empty")
				return
			if len(Each_Row[2]) == 0:
				Each_Row[2] = DefaultComment
			IP = Check_IP(Each_Row[1])
			if IP == False:
				return
			elif '/32' in Each_Row[1] or '/' not in Each_Row[1]:
				Each_Row[1]=IP[0]
			else: Each_Row[1] = IP
			PunchCard.append(Each_Row)
		for Each_Element in PunchCard:
			print(Each_Element)

def Check_IP(ip):
	''' CSV Parser calls this function to validate IP/Mask pair. 
		Once validated, CSV Parser appends each punch card with validated IP/Mask pair
	'''
	try:
		address = IPv4Network(ip, strict = False).with_netmask
		SplitAddress = address.split('/')
		IP = SplitAddress[0]
		MASK = SplitAddress[1]
		return [IP,MASK]
	except ValueError as error:
		error = "Mistake in IP/Subnet Pair : Check CSV file"
		print (error)
		return False
			
	#print(ASA)
# ASA = commands('INT-NET-192.168.1.0', '192.168.1.0','255.255.255.0', 'test-host-internal1')
# print(ASA.ASASubnetObject())
CSV_Parse()