"""test_txn_date.py - Unit tests for transaction date validation"""
# Copyright © 2020  Brett Smith
# License: AGPLv3-or-later WITH Beancount-Plugin-Additional-Permission-1.0
#
# Full copyright and licensing details can be found at toplevel file
# LICENSE.txt in the repository.

import itertools

from datetime import date

import pytest

from . import testutil

from conservancy_beancount import config as configmod
from conservancy_beancount import errors as errormod
from conservancy_beancount.plugin import txn_date as hookmod

BOOKS_PATH = testutil.test_path('books')
CONFIG = testutil.TestConfig(books_path=BOOKS_PATH)
HOOK = hookmod.TransactionDate(CONFIG)
SUFFIXES = itertools.cycle([
    '',
    '_sidefile',
    '/subdirfile',
])

@pytest.mark.parametrize('txn_date,fyear,suffix', [
    (date(2016, 1, 1), 2015, next(SUFFIXES)),
    (date(2016, 2, 29), 2015, next(SUFFIXES)),
    (date(2016, 3, 1), 2016, next(SUFFIXES)),
    (date(2016, 12, 31), 2016, next(SUFFIXES)),
    (date(2017, 2, 28), 2016, next(SUFFIXES)),
    (date(2017, 3, 1), 2017, next(SUFFIXES)),
])
def test_good_txn(txn_date, fyear, suffix):
    filename = str(BOOKS_PATH / f'{fyear}{suffix}.beancount')
    txn = testutil.Transaction(date=txn_date, filename=filename, postings=[
        ('Assets:Cash', 5),
        ('Income:Donations', -5),
    ])
    assert not list(HOOK.run(txn))

@pytest.mark.parametrize('txn_date,fyear,suffix', [
    (date(2018, 1, 1), 2017, next(SUFFIXES)),
    (date(2018, 12, 31), 2018, next(SUFFIXES)),
    (date(2019, 3, 1), 2019, next(SUFFIXES)),
])
def test_bad_txn(txn_date, fyear, suffix):
    filename = str(BOOKS_PATH / f'2020{suffix}.beancount')
    txn = testutil.Transaction(date=txn_date, filename=filename, postings=[
        ('Assets:Cash', 5),
        ('Income:Donations', -5),
    ])
    errors = list(HOOK.run(txn))
    assert len(errors) == 1
    assert errors[0].message == f"transaction dated in FY{fyear} entered in FY2020 books"

@pytest.mark.parametrize('path_s', [
    'books/2020.beancount',
    'historical/2020.beancount',
    'definitions.beancount',
])
def test_outer_transactions_not_checked(path_s):
    txn_date = date(1900, 6, 15)
    filename = str(BOOKS_PATH / path_s)
    txn = testutil.Transaction(date=txn_date, filename=filename, postings=[
        ('Assets:Cash', 5),
        ('Income:Donations', -5),
    ])
    assert not list(HOOK.run(txn))

def test_error_without_books_path():
    config = configmod.Config()
    with pytest.raises(errormod.ConfigurationError):
        hookmod.TransactionDate(config)