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from __future__ import absolute_import, unicode_literals, print_function

import urllib2
import uuid
import argparse
import getpass
import itertools
import collections
import datetime
import contextlib
import logging
import inspect
import json
import re

import path
import dateutil.parser
import keyring
import pkg_resources
import jaraco.util.string as jstring
from jaraco.util.string import local_format as lf
import jaraco.util.logging
import jaraco.util.meta

log = logging.getLogger(__name__)

def load_sites():
	Locate all setuptools entry points by the name 'financial_institutions'
	and initialize them.
	Any third-party library may register an entry point by adding the
	following to their

		entry_points = {
			'financial_institutions': {
				'institution set=mylib.mymodule:institutions',

	Where `institutions` is a dictionary mapping institution name to
	institution details.

	group = 'financial_institutions'
	entry_points = pkg_resources.iter_entry_points(group=group)
	for ep in entry_points:
		try:'Loading %s',
			detail = ep.load()
		except Exception:
			log.exception("Error initializing institution %s." % ep)

sites = dict()

def _field(tag, value):
	return lf('<{tag}>{value}')

def _tag(tag, *contents):
	start_tag = lf('<{tag}>')
	end_tag = lf('</{tag}>')
	lines = itertools.chain([start_tag], contents, [end_tag])
	return '\r\n'.join(lines)

def _date():
	return datetime.datetime.utcnow().strftime("%Y%m%d%H%M%S")

def _genuuid():
	return uuid.uuid4().hex

AppInfo = collections.namedtuple('AppInfo', 'id version')

def url_context(*args, **kwargs):
	Context wrapper around urlopen
	response = urllib2.urlopen(*args, **kwargs)
		yield response

def sign_on_message(config):
	fidata = [_field("ORG", config["fiorg"])]
	if 'fid' in config:
		fidata += [_field("FID", config["fid"])]
	return _tag("SIGNONMSGSRQV1",
			_field("DTCLIENT", _date()),
			_field("USERID", config["user"]),
			_field("USERPASS", config["password"]),
			_field("LANGUAGE", "ENG"),
			_tag("FI", *fidata),
			_field("APPID", config["appid"]),
			_field("APPVER", config["appver"]),

def get_version_id():
	OFX seems to like version ids that look like NNNN, so generate something
	like that from our version.
	ver = pkg_resources.require('')[0].version
	ver_id = ''.join(re.findall('\d+', ver))
	# first pad right to three digits (so last two digits are minor/patch ver)
	ver_id = '{:0<3s}'.format(ver_id)
	# now pad left to four digits (so first two digits are major ver)
	ver_id = '{:0>4s}'.format(ver_id)
	assert len(ver_id) == 4
	return ver_id

class OFXClient(object):
	Encapsulate an ofx client, config is a dict containing configuration.

	# pyofx is appears to be work for many institutions
	pyofx = AppInfo('PyOFX', '0100')
	# if you have problems, fake quicken with one of these app ids
	quicken_2009 = AppInfo('QWIN', '1800')
	quicken_older = AppInfo('QWIN', '1200')
	money_sunset = AppInfo('Money Plus', '1700')

	app = pyofx

	def __init__(self, config, user, password):
		self.password = password
		self.user = user
		self.config = config
		self.cookie = 3
		config["user"] = user
		config["password"] = password

	def _cookie(self):
		self.cookie += 1
		return str(self.cookie)

	def sign_on(self):
		"""Generate signon message"""
		return sign_on_message(self.config)

	def _acctreq(self, dtstart):
		req = _tag("ACCTINFORQ", _field("DTACCTUP", dtstart))
		return self._message("SIGNUP", "ACCTINFO", req)

	# this is from _ccreq below and reading page 176 of the latest OFX doc.
	def _bareq(self, bankid, acctid, dtstart, accttype):
		req = _tag("STMTRQ",
				_field("BANKID", bankid),
				_field("ACCTID", acctid),
				_field("ACCTTYPE", accttype),
				_field("DTSTART", dtstart),
				_field("INCLUDE", "Y"),
		return self._message("BANK", "STMT", req)

	def _ccreq(self, acctid, dtstart):
		req = _tag("CCSTMTRQ",
			_tag("CCACCTFROM", _field("ACCTID", acctid)),
				_field("DTSTART", dtstart),
				_field("INCLUDE", "Y"),
		return self._message("CREDITCARD", "CCSTMT", req)

	def _invstreq(self, brokerid, acctid, dtstart):
		dtnow = _date()
		req = _tag("INVSTMTRQ",
				_field("BROKERID", brokerid),
				_field("ACCTID", acctid),
				_field("DTSTART", dtstart),
				_field("INCLUDE", "Y"),
			_field("INCOO", "Y"),
				_field("DTASOF", dtnow),
				_field("INCLUDE", "Y"),
			_field("INCBAL", "Y"),
		return self._message("INVSTMT", "INVSTMT", req)

	def _message(self, msgType, trnType, request):
		return _tag(msgType + "MSGSRQV1",
			_tag(trnType + "TRNRQ",
				_field("TRNUID", _genuuid()),
				_field("CLTCOOKIE", self._cookie()),

	def _header(self):
		return '\r\n'.join([
			"NEWFILEUID:" + _genuuid(),

	def baQuery(self, bankid, acctid, dtstart, accttype):
		"""Bank account statement request"""
		return '\r\n'.join([
				self._bareq(bankid, acctid, dtstart, accttype),

	def ccQuery(self, acctid, dtstart):
		"""CC Statement request"""
		return '\r\n'.join([
				self._ccreq(acctid, dtstart),

	def acctQuery(self, dtstart):
		return '\r\n'.join([

	def invstQuery(self, brokerid, acctid, dtstart):
		return '\r\n'.join([
				self._invstreq(brokerid, acctid, dtstart),

	def doQuery(self, query, name):
		headers = {
			"Content-type": "application/x-ofx",
			"Accept": "*/*, application/x-ofx",
		request = urllib2.Request(
			data = query,
			headers = headers,

		url = self.config["url"]
		log.debug(lf("URL is {url}; query is {query}"))

		with url_context(request) as response:
			payload =
			content_type = response.headers.getheader('Content-type')
			if content_type != 'application/x-ofx':
				log.warning(lf('Unexpected content type {content_type}'))

		with file(name, "w") as outfile:

class DateAction(argparse.Action):
	def __call__(self, parser, namespace, values, option_string=None):
		value = values
		value = dateutil.parser.parse(value)
		setattr(namespace, self.dest, value)

# todo: move the following class to jaraco.util
class Command(object):
	__metaclass__ = jaraco.util.meta.LeafClassesMeta

	def add_subparsers(cls, parser):
		subparsers = parser.add_subparsers()
		[cmd_class.add_parser(subparsers) for cmd_class in cls._leaf_classes]

	def add_parser(cls, subparsers):
		cmd_string = jstring.words(cls.__name__).lowered().dash_separated()
		parser = subparsers.add_parser(cmd_string)
		return parser

	def download(site, account, dt_start, creds, account_type=None):
		config = sites[site]
		client = OFXClient(config, *creds)

		caps = sites[site]['caps']
		if "CCSTMT" in caps:
			query = client.ccQuery(account, dt_start)
		elif "INVSTMT" in caps:
			query = client.invstQuery(sites[site]["fiorg"], account, dt_start)
		elif "BASTMT" in caps:
			bank_id = config["bankid"]
			query = client.baQuery(bank_id, account, dt_start, account_type)
		filename = '{site} {account} {dtnow}.ofx'.format(
			dtnow ='%Y-%m-%d'),
		client.doQuery(query, filename)

	def _get_password(site, username):
		password = keyring.get_password(site, username)
		if password is None:
			password = getpass.getpass(lf("Password for {site}:{username}: "))
			keyring.set_password(site, username, password)
		return password

class Query(Command):
	def add_parser(cls, subparsers):
		parser = super(Query, cls).add_parser(subparsers)
		parser.add_argument('site', help="One of {0}".format(', '.join(sites)))
		parser.add_argument('-u', '--username', default=getpass.getuser())
		parser.add_argument('-a', '--account')
		parser.add_argument('-t', '--account-type',
			help="Required if retrieving bank statement, should be CHECKING, SAVINGS, ...",
		default_start = - datetime.timedelta(days=31)
		parser.add_argument('-d', '--start-date', default=default_start,
		return parser

	def run(cls, args):
		creds = args.username, cls._get_password(, args.username)
		if not args.account:
			# download account info
			config = sites[]
			client = OFXClient(config, *creds)
			query = client.acctQuery("19700101000000")
			client.doQuery(query, + "_acct.ofx")
			dt_start = args.start_date.strftime("%Y%m%d"), args.account, dt_start, creds,

class DownloadAll(Command):
	def add_parser(cls, subparsers):
		parser = super(DownloadAll, cls).add_parser(subparsers)
		default_start = - datetime.timedelta(days=31)
		parser.add_argument('-d', '--start-date', default=default_start,
		return parser

	def run(cls, args):
		root = path.path('~/Documents/Financial').expanduser()
		accounts = root / 'accounts.json'
		with open(accounts) as f:
			accounts = json.load(f)
		print('Found', len(accounts), 'accounts')
		for account in accounts:'Downloading %(institution)s' % account)
			username = account.get('username', getpass.getuser())
			site = account['institution']
			creds = username, cls._get_password(site, username)
			acct_type = account.get('type', '').upper() or None
			dt_start = args.start_date.strftime("%Y%m%d"), account['account'], dt_start, creds, acct_type)

def get_args():
	Parse command-line arguments, including the Command and its arguments.
	usage = inspect.getdoc(handle_command_line)
	parser = argparse.ArgumentParser(usage=usage)
	return parser.parse_args()

def handle_command_line():
	args = get_args()

if __name__ == "__main__":