#!/usr/bin/env python3

# -*- coding: utf-8 -*-

""" TSB import for Nottingham Hackspace

Intended to be called from tsbscrape and passed a JOSN string for each transaction

Requires piecash, python-dateutil

Author: Matt Lloyd

Copyright (c) 2019 Matt Lloyd

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

"""

from piecash import open_book, Transaction, Split, GncImbalanceError, ledger

from datetime import datetime, timedelta

from dateutil.parser import isoparse

import pytz

from decimal import Decimal

import configparser

import logging

import os

import sys

import json

import hashlib

dirname = os.path.dirname(os.path.realpath(__file__))

# setup initial Logging

logging.getLogger().setLevel(logging.NOTSET)

logger = logging.getLogger('TSB import')

# _ch = logging.StreamHandler()

# _ch.setLevel(logging.WARN) # this should be WARN by default

_formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

# _ch.setFormatter(_formatter)

# logger.addHandler(_ch)

_fh = logging.FileHandler(os.path.join(dirname, 'tsb-import.log'))

_fh.setFormatter(_formatter)

_fh.setLevel(logging.INFO)

logger.addHandler(_fh)

logger.info("Importing TSB charges")

configFilename = os.path.join(dirname, 'imports.cfg')

config = configparser.ConfigParser()

config.read(configFilename)

# gnucash book we are working with

bookPath = config['GNUCash']['book_path']

# get current rent amounts from config

f6Rent = int(config['GNUCash']['f6_rent'])

g456Rent = int(config['GNUCash']['g456_rent'])

auditMinimumAmount = int(config['GNUCash']['audit_minimum_amount'])

logger.info("Into GnuCash book: {}".format(bookPath))

with open_book(bookPath, readonly=False) as book:

tsbAccount = book.accounts(fullname="Assets:Current Assets:TSB Account")

# grab extra accounts we need

g456Account = book.accounts(fullname="Expenses:Bizspace Rent:G4,5,6")

electricAccont = book.accounts(fullname="Expenses:Utilities:Electric")

donationsMembershipAccount = book.accounts(fullname="Income:Donations:Membership Payments")

gbp = tsbAccount.commodity

importCount = 0

# expect one JSON transaction per line

# {

# date: '2020-01-06T00:00:00.000Z',

# description: 'STRIPE PAYMENTS UK LTD STRIPE',

# in: 3904,

# out: null,

# amount: 3904,

# transferAccount: 'Assets:Current Assets:Stripe'

# }

for line in sys.stdin:

transaction = json.loads(line)

logger.info("Got Transaction to import: {}".format(json.dumps(transaction)))

# find the transferAccount

try:

transferAccount = book.accounts(fullname=transaction['transferAccount'])

except KeyError as e:

logger.warn("Unable to find Account: {}".format(transaction['transferAccount']))

print(json.dumps("Transaction not imported: Unable to find Account: {}".format(hashString)))

else:

# build hash for transaction to use a an UID

hashString = "{}:{};{}".format(transaction['date'], transaction['description'], transaction['amount'])

hashHex = hashlib.sha256(hashString.encode()).hexdigest()

try:

# see if we have already recorded this transaction

book.transactions.get(num=hashHex)

logger.info("Skipped already recorded: {} {}".format(hashString, hashHex))

print(json.dumps("Skipped already recorded: {}".format(hashString)))

continue

except KeyError:

# we have not yet recorded this txn_ id

pass

# pull out some generic details for this transaction

amount = Decimal(transaction['amount'])/100

createdAt = isoparse(transaction['date']).astimezone(pytz.timezone("Europe/London"))

splits = []

if (transaction['transferAccount'] == 'Expenses:Bizspace Rent:F6' and (-1*transaction['amount']) > (f6Rent+g456Rent)):

# pre spilt the rent

# prep rent amounts

f6Amount = Decimal(f6Rent)/100

g456Amount = Decimal(g456Rent)/100

# calculate electric amount

electricAmount = Decimal(transaction['amount'] + f6Rent + g456Rent)/100

splits=[

Split(account=tsbAccount, value=amount),

Split(account=transferAccount, value=f6Amount), #F6

Split(account=g456Account, value=g456Amount),

Split(account=electricAccont, value=-1*electricAmount)

];

elif transaction['transferAccount'] == 'Income:Membership Payments':

if transaction['amount'] < auditMinimumAmount:

# payments less than the minimum are counted as donations

splits=[

Split(account=tsbAccount, value=amount),

Split(account=donationsMembershipAccount, value=-1*amount),

];

elif transaction['amount'] == auditMinimumAmount:

# just the normal splits

splits = [

Split(account=tsbAccount, value=amount),

Split(account=transferAccount, value=-1*amount)

];

else:

membershipAmount = Decimal(auditMinimumAmount)/100

donationsAmount = Decimal(transaction['amount'] - auditMinimumAmount)/100

splits=[

Split(account=tsbAccount, value=amount),

Split(account=transferAccount, value=-1*membershipAmount),

Split(account=donationsMembershipAccount, value=-1*donationsAmount),

];

else:

# just the normal splits

splits = [

Split(account=tsbAccount, value=amount),

Split(account=transferAccount, value=-1*amount)

];

# now we have the splits we can create the trasnaction

Transaction(currency=gbp,

enter_date=createdAt,

post_date=createdAt.date(),

num=hashHex,

description=transaction['description'],

splits=splits

)

# save the book

if not book.is_saved:

book.save()

importCount += 1

logger.info("Imported, Total count: {}".format(importCount))

print(json.dumps("Imported, Total count: {}".format(importCount)))