#!/usr/bin/env python3
#
# Copyright 2022, Mischa Peters <mischa AT alkira DOT net>, Alkira.
# push.py
# Version 0.1 - 20220617 - initial release
# Version 0.2 - 20220620 - added collection of credentialId
# Version 0.3 - 20220708 - config everywhere!!
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
import os
import sys
import re
import json
import time
import logging
import requests
import configparser
import argparse

# Parse all arguments
parser = argparse.ArgumentParser(description="Push JSON files to AlkiraAPI configured in a cnf config file")
parser.add_argument("-t", "--tenant", type=str, default='alkira.cnf', help="location of alikira.cnf (default: alkira.cnf)")
parser.add_argument("-f", "--folder", type=str, default='config', help="location of the JSON connector files (default: config)")
parser.add_argument("-c", "--config", type=str, default='connectors.cnf', help="location of the connector config (default: config/connectors.cnf)")
parser.add_argument("-v", "--verbose", type=int, default=0, help="Verbose level 0 or 1 (default: 0)")

try:
	args = parser.parse_args()
	ALKIRA_CONFIG = args.tenant
	connector_folder = args.folder
	CONNECTOR_CONFIG = f'{args.folder}/{args.config}'
except argparse.ArgumentError as e:
	print(str(e))
	sys.exit()

try:
	loglevel = {
		0: logging.INFO,
		1: logging.DEBUG
	}[args.verbose]
except KeyError:
	loglevel = logging.INFO

###############################################

# Set loglevel (logging.INFO, logging.DEBUG)
logging.basicConfig(level=loglevel)
logging = logging.getLogger('AlkiraAPI')

# Tenant config
if not os.path.isfile(ALKIRA_CONFIG):
	logging.error(f"The config file {ALKIRA_CONFIG} doesn't exist")
	sys.exit(1)
alkira = configparser.RawConfigParser()
alkira.read(ALKIRA_CONFIG)
ALKIRA_TENANT = alkira.get('alkira', 'ALKIRA_TENANT')
ALKIRA_USERNAME = alkira.get('alkira', 'ALKIRA_USERNAME')
ALKIRA_PASSWORD = alkira.get('alkira', 'ALKIRA_PASSWORD')
ALKIRA_BASE_URI = f'https://{ALKIRA_TENANT}/api'
AWS_SERVICE_USERNAME = alkira.get('services', 'AWS_SERVICE_USERNAME')
AZURE_SERVICE_USERNAME = alkira.get('services', 'AZURE_SERVICE_USERNAME')
SERVICE_PASSWORD = alkira.get('services', 'SERVICE_PASSWORD')
CIDR_NAME = alkira.get('globalcidr', 'CIDR_NAME')
CIDR_DESCR = alkira.get('globalcidr', 'CIDR_DESCR')
CIDR_PREFIX = alkira.get('globalcidr', 'CIDR_PREFIX')
CIDR_CXP = alkira.get('globalcidr', 'CIDR_CXP')

# Connector config
if not os.path.isfile(CONNECTOR_CONFIG):
	logging.error(f"The config file {CONNECTOR_CONFIG} doesn't exist")
	sys.exit(1)
config = configparser.ConfigParser()
config.read(CONNECTOR_CONFIG)

###############################################

# Set default headers
headers = {'Content-Type': "application/json"}

# URL Exceptions
url_exceptions = {
	"saas": "internet",
	"pan": "panfw",
	"ftntfw": "ftnt-fw-",
	"chkpfw": "chkp-fw-",
	"ocivcnconnectors": "oci-vcn-connectors",
	"ftntfwservices": "ftnt-fw-services",
	"chkpfwservices": "chkp-fw-services"
	}

# URL Exceptions creating credentials
service_credentials = {
	"panfwservices": "pan",
	"ftntfwservices": "ftntfw",
	"chkpfwservices": "chkp-fw"
	}

# URL Exceptions creating instance credentials
service_instance_credentials = {
	"ftntfwservices": "ftntfw-",
	"chkpfwservices": "chkp-fw-"
	}

# Global CIDR
service_global_cidr = [
        "chkpfwservices"
        ]

# Credential Types
credential_types = {
	"awsvpc": "",
	"azurevnet": "",
	"gcpvpc": "",
	"ocivcn": "",
	}

def alkira_login():
	body = {'userName': ALKIRA_USERNAME,
		'password': ALKIRA_PASSWORD}
	session = requests.session()
	response = alkira_post(session, '/login', body)
	return session

def alkira_post(session, uri, body):
	url = f'{ALKIRA_BASE_URI}{uri}'
	try:
		response = session.post(url, data=json.dumps(body), headers=headers)
		match int(str(response.status_code)[0]):
			case 4:
				logging.error(response.content)
		response.raise_for_status()
	except Exception as e:
		logging.error(f'Error: {str(e)}')
		sys.exit(1)
	return response

def alkira_get(session, uri):
	url = f'{ALKIRA_BASE_URI}{uri}'
	try:
		response = session.get(url, headers=headers)
		response.raise_for_status()
	except Exception as e:
		logging.error(f'Error: {str(e)}')
		sys.exit(1)
	return response

def alkira_delete(session, uri):
	url = f'{ALKIRA_BASE_URI}{uri}'
	try:
		response = session.delete(url, headers=headers)
		response.raise_for_status()
	except Exception as e:
		logging.error(f'Error: {str(e)}')
		sys.exit(1)
	return response

def alkira_service(session, connector_name):
	fwcredential = f'fwcredential-{time.time()}'
	body = {
		"credentials": {
			"userName": AWS_SERVICE_USERNAME,
			"password": SERVICE_PASSWORD
		},
		"name": fwcredential
	}
	logging.debug(f'Received Connector: {connector_name}')
	logging.info('=== Create Service Credentials')
	if connector_name in service_credentials.keys():
		credentials_url = service_credentials[connector_name]
		logging.debug(f'URL: {credentials_url}')
	response = alkira_post(session, f'/credentials/{credentials_url}', body)
	json_body = response.json()
	if response.status_code == 200:
		service_credentialid = json_body['id']
		logging.debug(f'credentialId: {service_credentialid}')

	logging.info('=== Create Instance Credentials')
	if connector_name in service_instance_credentials.keys():
		credentials_url = service_instance_credentials[connector_name]
		logging.debug(f'URL: {credentials_url}')
	response = alkira_post(session, f'/credentials/{credentials_url}instance', body)
	json_body = response.json()
	if response.status_code == 200:
		service_instance_credentialid = json_body['id']
		logging.debug(f'instance credentialId: {service_instance_credentialid}')
	return service_credentialid, service_instance_credentialid 

def alkira_global_cidr(session, connector_name):
	body = {
		"name": CIDR_NAME,
		"description": CIDR_DESCR,
		"values": [
			CIDR_PREFIX
		],
		"cxp": CIDR_CXP
	}
	logging.debug(f'Received Connector: {connector_name}')
	logging.info('=== Create Global CIDR')
	response = alkira_post(session, f'/tenantnetworks/{tenantNetworkId}/global-cidr-lists', body)
	json_body = response.json()
	if response.status_code == 201:
		global_cidr_id = json_body['id']
		logging.debug(f'global cidr id: {global_cidr_id}')
	return global_cidr_id

# Authenticate
logging.info('=== Authenticating')
s = alkira_login()
logging.debug(s)

# Get TenantID
logging.info('=== Fetching Tenant Info')
r = alkira_get(s, '/tenantnetworks')
data = r.json()
tenantNetworkId = data[0]['id']
tenantName = data[0]['name']
logging.info(f'Tenant Name: {tenantName}')
logging.info(f'Tenant ID: {tenantNetworkId}')

# Get Credentials
logging.info('=== Fetching Credentials')
r = alkira_get(s, '/credentials')
data = r.json()
logging.debug(json.dumps(data))
for key in data:
	if key['credentialType'].lower() in credential_types:
		logging.debug(f"CredentialType: {key['credentialType']} - CredentialId: {key['credentialId']}")
		credential_types[key['credentialType'].lower()] = key['credentialId']

# Push connectors
logging.info('=== Push Connectors')
for connector in config.sections():
	section = config[connector]
	connector_result = re.match(r'(\w+)(connectors|services)(\d+)', connector)
	connector_type = connector_result.group(1)
	connector_name = f'{connector_type}{connector_result.group(2)}'
	connector_number = connector_result.group(3)
	logging.debug(f'{connector_folder}/{connector_name}{connector_number}.txt')
	config_path = (f'{connector_folder}/{connector_name}{connector_number}.txt')

	if 'service' in connector_name:
		service_credentialid, service_instance_credentialid = alkira_service(s, connector_name)
		logging.debug(f'Got credentialId: {service_credentialid} AND {service_instance_credentialid}')
		if connector_name in service_global_cidr:
			service_global_cidr_id = alkira_global_cidr(s, connector_name)
			logging.debug(f'Got global cidr id: {service_global_cidr_id}')

	with open (config_path, 'r') as f:
		body = json.load(f)

		if 'connectors' in connector_name and connector_type in credential_types and credential_types[connector_type]:
			if 'credentialId' in body:
				logging.debug(f"JSON credentialid: {body['credentialId']}")
				logging.debug(f'API credentialid: {credential_types[connector_type]}')
				body['credentialId'] = credential_types[connector_type]

		for key in ['cxp', 'size', 'group']:
			if key in body:
				logging.debug(f"JSON {key}: {body[key]}")
			if key in section:
				try:
					if alkira.get(key, section[key]):
						logging.debug(f"CNF CONFIG {key}: {alkira.get(key, section[key])}")
						body[key] = alkira.get(key, section[key])
				except:
					logging.debug(f"{key} not defined in main config")
					logging.debug(f"CONFIG {key}: {section[key]}")
					body[key] = section[key]

		for key in ['segments', 'billingTags']:
			if key in body:
				logging.debug(f"JSON {key}: {body[key][0]}")
			if key in section:
				try:
					if alkira.get(key, section[key]):
						logging.debug(f"CNF CONFIG {key}: {alkira.get(key, section[key])}")
						body[key][0] = alkira.get(key, section[key])
				except:
					logging.debug(f"{key} not defined in main config")
					logging.debug(f"CONFIG key: {section[key]}")
					body[key][0] = section[key]

		if 'services' in connector_name and 'credentialId' in body and 'service_credentialid' in locals():
			logging.debug(f'API credentialid: {service_credentialid}')
			body['credentialId'] = service_credentialid

		if 'services' in connector_name and 'instances' in body and 'credentialId' in body['instances'][0] and 'service_instance_credentialid' in locals():
			logging.debug(f'API instance credentialid: {service_instance_credentialid}')
			body['instances'][0]['credentialId'] = service_instance_credentialid

		if 'services' in connector_name and 'managementServer' in body and 'globalCidrListId' in body['managementServer'] and 'service_global_cidr_id' in locals():
			logging.debug(f'API globalCidrListId: {service_global_cidr_id}')
			body['managementServer']['globalCidrListId'] = service_global_cidr_id

		logging.debug(json.dumps(body))
		logging.info(f"=== Pushing {body['name'][:30]} ({connector_name}) to {body['cxp']} (size: {body['size']}; segment: {body['segments'][0]})")
		logging.debug(f'CONNECTOR BEFORE AGAIN: {connector_name}')
		if connector_name in url_exceptions.keys():
			connector_name = url_exceptions[connector_name]
		logging.debug(f'CONNECTOR AFTER AGAIN: {connector_name}')
		r = alkira_post(s, f'/tenantnetworks/{tenantNetworkId}/{connector_name}', body)
		logging.info(r.status_code)
		logging.debug(r.content)