#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Plugin to monitor nextcloud external api statistics
# 	* user activity
# 	* db size
# 	* share count
# 	* available app updates
#
# Parameters understood:
#     config   (required)
#     autoconf (optional - used by munin-config)

# Magic markers - optional - used by installation scripts and
# munin-config:
#
#  #%# family=manual
#  #%# capabilities=autoconf
import requests
import sys
import os
import re


class APIExtract:
	def __init__(self, result, api_repsonse):
		self.api_response = api_repsonse
		self.result = result

	def user_activity(self):
		users = self.api_response['ocs']['data']['activeUsers']

		self.result.append('multigraph nextcloud_users')
		for key in users.keys():
			self.result.append(str(key) + ".value " + str(users[key]))

		return self.result

	def shares(self):
		shares = self.api_response['ocs']['data']['nextcloud']['shares']

		# use regex to remove permission stats from api response
		reg = re.compile("num.*")
		share_keys = shares.keys()
		sharelist = list(filter(reg.match, share_keys))

		self.result.append('multigraph nextcloud_shares')
		for key in sharelist:
			self.result.append(str(key) + ".value " + str(shares[key]))

		return self.result

	def dbsize(self):
		dbsize = self.api_response['ocs']['data']['server']['database']['size']
		self.result.append('multigraph nextcloud_dbsize')
		self.result.append('db_size.value %s' % dbsize)

		return self.result

	def apps(self):
		num_updates_available = self.api_response['ocs']['data']['nextcloud']['system']['apps']['num_updates_available']
		self.result.append('multigraph nextcloud_apps')
		self.result.append('num_updates_available.value %s' % num_updates_available)

		return self.result


class NextcloudMultiGraph:
	if (sys.argv.__len__() == 2) and (sys.argv[1] == "config"):
		print('multigraph nextcloud_users')
		print('graph_title Nextcloud User Activity')
		print('graph_args --base 1024 -l 0')
		print('graph_printf %.0lf')
		print('graph_vlabel connected users')
		print('graph_info graph showing the number of connected user')
		print('graph_category nextcloud')

		print('last5minutes.label last 5 minutes')
		print('last5minutes.info users connected in the last 5 minutes')
		print('last1hour.label last hour')
		print('last1hour.info users connected in the last hour')
		print('last24hours.label last 24 hours')
		print('last24hours.info users connected in the last 24 hours')

		print('multigraph nextcloud_dbsize')
		print('graph_title Nextcloud Database Size')
		print('graph_args --base 1024 -l 0')
		print('graph_vlabel size in byte')
		print('graph_info graph showing the database size in byte')
		print('graph_category nextcloud')

		print('db_size.label database size in byte')
		print('db_size.info users connected in the last 5 minutes')
		print('db_size.draw AREA')

		print('multigraph nextcloud_pending_updates')
		print('graph_title Nextcloud pending App updates')
		print('graph_args --base 1024 -l 0')
		print('graph_vlabel updates pending')
		print('graph_info graph showing the number of available app updates')
		print('graph_category nextcloud')

		print('num_updates_available.label available app updates')
		print('num_updates_available.info number of available app updates')

		print('multigraph nextcloud_shares')
		print('graph_title Nextcloud Shares')
		print('graph_args --base 1024 -l 0')
		print('graph_vlabel number of shares')
		print('graph_info graph showing the number of shares')
		print('graph_category nextcloud')

		print('num_fed_shares_received.label federated shares recieved')
		print('num_fed_shares_received.info current total of federated shares recieved')
		print('num_fed_shares_sent.label federated shares sent')
		print('num_fed_shares_sent.info current total of federated shares sent')
		print('num_shares.label total number of shares')
		print('num_shares.info current over all total of shares')
		print('num_shares_groups.label group shares')
		print('num_shares_groups.info current total of group shares')
		print('num_shares_link.label link shares')
		print('num_shares_link.info current total of shares through a link')
		print('num_shares_link_no_password.label link shares without a password')
		print('num_shares_link_no_password.info current total of shares through a link without a password protection')
		print('num_shares_user.label user shares')
		print('num_shares_user.info current total of user shares')
	elif (sys.argv.__len__() == 2) and (sys.argv[1] == 'autoconf'):
		# check host if env variables are set
		try:
			if None not in {os.environ['url'], os.environ['username'], os.environ['password']}:
				print('yes')
		except KeyError:
			print('no env configuration options are missing')
	else:
		# read the configuration from munin environment
		URL = os.environ['url']
		auth = (os.environ['username'], os.environ['password'])

		# init requests session with specific header and credentials
		with requests.Session() as s:
			s.auth = auth
			s.headers.update({'Accept': 'application/json'})
			s.stream = False

			# request data from api
			r = s.get(URL)

		# if status code is successful close connection and continue
		if r.status_code == 200:
			s.close()
			api_response = r.json()

			result = list()
			extract = APIExtract(result, api_response)
			extract.user_activity()
			extract.dbsize()
			extract.shares()
			extract.apps()

			print('\n'.join(result))
		elif r.status_code == 996:
			print('server error')
		elif r.status_code == 997:
			print('not authorized')
		elif r.status_code == 998:
			print('not found')
		else:
			print('unknown error')


if __name__ == "__main__":
	NextcloudMultiGraph()
	quit(0)