#!/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


class NextcloudMultiGraph:
	def __init__(self):
		self.config = [
			# users
			'multigraph nextcloud_users',
			'graph_title Nextcloud User Activity',
			'graph_args --base 1000 -l 0',
			'graph_printf %.0lf',
			'graph_vlabel connected users',
			'graph_info graph showing the number of connected user',
			'graph_category nextcloud',
			'last5minutes.label last 5 minutes',
			'last5minutes.info users connected in the last 5 minutes',
			'last5minutes.min 0',
			'last1hour.label last hour',
			'last1hour.info users connected in the last hour',
			'last1hour.min 0',
			'last24hours.label last 24 hours',
			'last24hours.info users connected in the last 24 hours',
			'last24hours.min 0',
			'num_users.label number of users',
			'num_users.info total number of users',
			'num_users.min 0',

			# shares
			'multigraph nextcloud_shares',
			'graph_title Nextcloud Shares',
			'graph_args --base 1000 -l 0',
			'graph_printf %.0lf',
			'graph_vlabel number of shares',
			'graph_info graph showing the number of shares',
			'graph_category nextcloud',
			'num_shares.label total number of shares',
			'num_shares.info current over all total of shares',
			'num_shares.min 0',
			'num_shares_user.label user shares',
			'num_shares_user.info current total of user shares',
			'num_shares_user.min 0',
			'num_shares_groups.label group shares',
			'num_shares_groups.info current total of group shares',
			'num_shares_groups.min 0',
			'num_shares_link.label link shares',
			'num_shares_link.info current total of shares through a link',
			'num_shares_link.min 0',
			'num_shares_mail.label mail shares',
			'num_shares_mail.info current total of mail shares',
			'num_shares_mail.min 0',
			'num_shares_room.label room shares',
			'num_shares_room.info current total of room shares',
			'num_shares_room.min 0',
			'num_shares_link_no_password.label link shares without a password',
			'num_shares_link_no_password.info current total of shares through a link without a password protection',
			'num_shares_link_no_password.min 0',
			'num_fed_shares_sent.label federated shares sent',
			'num_fed_shares_sent.info current total of federated shares sent',
			'num_fed_shares_sent.min 0',
			'num_fed_shares_received.label federated shares recieved',
			'num_fed_shares_received.info current total of federated shares recieved',
			'num_fed_shares_received.min 0',

			# dbsize
			'multigraph nextcloud_dbsize',
			'graph_title Nextcloud Database Size',
			'graph_args --base 1024 -l 0',
			'graph_vlabel size in byte',
			'graph_info graph showing the database size in byte',
			'graph_category nextcloud',
			'db_size.label database size in byte',
			'db_size.info users connected in the last 5 minutes',
			'db_size.draw AREA',
			'db_size.min 0',

			# available_updates
			'multigraph nextcloud_available_updates',
			'graph_title Nextcloud available App updates',
			'graph_args --base 1000 -l 0',
			'graph_printf %.0lf',
			'graph_vlabel updates available',
			'graph_info graph showing the number of available app updates',
			'graph_category nextcloud',
			'num_updates_available.label available app updates',
			'num_updates_available.info number of available app updates',
			'num_updates_available.min 0',
			'num_updates_available.warning 1',

			# storages
			'multigraph nextcloud_storages',
			'graph_title Nextcloud Storages',
			'graph_args --base 1000 -l 0',
			'graph_printf %.0lf',
			'graph_vlabel number',
			'graph_info graph showing the number of storages',
			'graph_category nextcloud',
			'num_storages.label total number of storages',
			'num_storages.info current over all total of storages',
			'num_storages.min 0',
			'num_storages_local.label number of local storages',
			'num_storages_local.info current over all total of storage',
			'num_storages_local.min 0',
			'num_storages_home.label number of home storages',
			'num_storages_home.info current over all total of storage',
			'num_storages_home.min 0',
			'num_storages_other.label number of other storages',
			'num_storages_other.info current over all total of storage',
			'num_storages_other.min 0',

			# filecount
			'multigraph nextcloud_filecount',
			'graph_title Nextcloud Files',
			'graph_args --base 1000 -l 0',
			'graph_printf %.0lf',
			'graph_vlabel number of files',
			'graph_info graph showing the number of files',
			'graph_category nextcloud',
			'num_files.label number of files',
			'num_files.info current number of files in the repository',
			'num_files.min 0'
		]
		self.result = list()

	def parse_data(self, api_response):
		# users
		users = api_response['ocs']['data']['activeUsers']
		num_users = api_response['ocs']['data']['nextcloud']['storage']['num_users']
		self.result.append('multigraph nextcloud_users')

		# append for every key in users the key and the value to the results
		for key, value in users.items():
			self.result.append('{k}.value {v}'.format(k=key, v=value))

		# append total number of users
		self.result.append('num_users.value %s' % num_users)

		# shares
		shares = api_response['ocs']['data']['nextcloud']['shares']
		self.result.append('multigraph nextcloud_shares')

		# append for every key in shares the key and the value if the key starts with "num"
		for key, value in shares.items():
			if key.startswith('num'):
				self.result.append('{k}.value {v}'.format(k=key, v=value))

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

		# app updates
		# precaution for Nextcloud versions prior to version 14
		version = api_response['ocs']['data']['nextcloud']['system']['version'].split(sep=".")

		if int(version[0]) >= 14:
			num_updates_available = api_response['ocs']['data']['nextcloud']['system']['apps']['num_updates_available']
			self.result.append('multigraph nextcloud_available_updates')
			self.result.append('num_updates_available.value %s' % num_updates_available)

		# storage
		storage = api_response['ocs']['data']['nextcloud']['storage']
		self.result.append('multigraph nextcloud_storages')

		# append for every key in storage the key and the value if the key starts with "num"
		for key, value in storage.items():
			if key.startswith('num_storages'):
				self.result.append('{k}.value {v}'.format(k=key, v=value))

		# filecount
		num_files = api_response['ocs']['data']['nextcloud']['storage']['num_files']
		self.result.append('multigraph nextcloud_filecount')
		self.result.append('num_files.value %s' % num_files)

	def run(self):
		# init request session with specific header and credentials
		with requests.Session() as s:
			# read credentials from env
			s.auth = (os.environ.get('username'), os.environ.get('password'))

			# update header for json
			s.headers.update({'Accept': 'application/json'})

			# request the data
			r = s.get(os.environ.get('url'))

		# if status code is successful continue
		if r.status_code == 200:
			self.parse_data(r.json())

			# output results to stdout
			for el in self.result:
				print(el, file=sys.stdout)

		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')

	def main(self):
		# check if any argument is given
		if sys.argv.__len__() >= 2:
			# check if first argument is config or autoconf if not fetch data
			if sys.argv[1] == "config":
				# output config list to stdout
				for el in self.config:
					print(el, file=sys.stdout)

				# if DIRTYCONFIG true also return the corresponding values
				if os.environ.get('MUNIN_CAP_DIRTYCONFIG') == '1':
					self.run()

			elif sys.argv[1] == 'autoconf':
				if None in [os.environ.get('username'), os.environ.get('password')]:
					print('env variables are missing')
				else:
					print('yes')
		else:
			self.run()


if __name__ == "__main__":
	NextcloudMultiGraph().main()