"""Test validation of paypal-id metadata"""
# Copyright © 2020  Brett Smith
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import itertools

import pytest

from . import testutil

from conservancy_beancount.plugin import meta_paypal_id

VALID_TXN_IDS = {
    # Basically normal ids.
    'A1234567890BCDEFG',
    '12345HIJKLNMO6780',
    # All numeric
    '05678901234567890',
    # All alphabetic
    'CDEFHSNOECRUHOECR',
}

VALID_INVOICE_IDS = {
    'INV2-ABCD-1234-EFGH-6789',
    # All numeric
    'INV2-1010-2020-3030-4567',
    # All alphabetic
    'INV2-ABCD-EFGH-IJKL-MNOP',
}

VALID_VALUES = VALID_TXN_IDS | VALID_INVOICE_IDS

INVALID_VALUES = {
    # Empty
    '',
    ' ',
    # Punctuation and whitespace
    'Z12345-67890QRSTU',
    'Y12345.67890QRSTU',
    'X12345_67890QRSTU',
    'W12345 67890QRSTU',
    'INV2-ABCD.1234-EFGH-7890',
    'INV2-ABCD-1234_EFGH-7890',
    'INV2-ABCD-1234-EFGH 7890',
    # Too short
    'Q1234567890RSTUV',
    'INV2-ABCD-1234-EFGH-789',
    # Too long
    'V123456789012345WX',
    'INV2-ABCD-1234-EFGH-78900',
    'INV2-ABCD-1234-EFGH-7890-IJKL',
    # Bad cadence
    'INV2-ABCD-1234-EFG-H7890',
    'INV2ABCD-123-EFG-456-789',
    'INV2ABCDEFGHIJKLMNOPQRST',
}

ACCOUNTS = itertools.cycle([
    'Assets:PayPal',
    'Assets:Receivable:Accounts',
])

TEST_KEY = 'paypal-id'
INVALID_MSG = f"{{}} has invalid {TEST_KEY}: {{}}".format
BAD_TYPE_MSG = f"{{}} has wrong type of {TEST_KEY}: expected str but is a {{}}".format

@pytest.fixture(scope='module')
def hook():
    config = testutil.TestConfig()
    return meta_paypal_id.MetaPayPalID(config)

def paypal_account_for_id(paypal_id):
    if paypal_id.startswith('INV'):
        return 'Assets:Receivable:Accounts'
    else:
        return 'Assets:PayPal'

@pytest.mark.parametrize('src_value', VALID_VALUES)
def test_valid_values_on_postings(hook, src_value):
    txn = testutil.Transaction(postings=[
        ('Income:Donations', -25),
        (paypal_account_for_id(src_value), 25, {TEST_KEY: src_value}),
    ])
    assert not list(hook.run(txn))

@pytest.mark.parametrize('src_value', INVALID_VALUES)
def test_invalid_values_on_postings(hook, src_value):
    acct = paypal_account_for_id(src_value)
    txn = testutil.Transaction(postings=[
        ('Income:Donations', -25),
        (acct, 25, {TEST_KEY: src_value}),
    ])
    actual = {error.message for error in hook.run(txn)}
    assert actual == {INVALID_MSG(acct, src_value)}

@pytest.mark.parametrize('src_value,acct', testutil.combine_values(
    testutil.NON_STRING_METADATA_VALUES,
    ACCOUNTS,
))
def test_bad_type_values_on_postings(hook, src_value, acct):
    txn = testutil.Transaction(postings=[
        ('Income:Donations', -25),
        (acct, 25, {TEST_KEY: src_value}),
    ])
    actual = {error.message for error in hook.run(txn)}
    assert actual == {BAD_TYPE_MSG(acct, type(src_value).__name__)}

@pytest.mark.parametrize('src_value', VALID_VALUES)
def test_valid_values_on_transactions(hook, src_value):
    txn = testutil.Transaction(**{TEST_KEY: src_value}, postings=[
        ('Income:Donations', -25),
        (paypal_account_for_id(src_value), 25),
    ])
    assert not list(hook.run(txn))

@pytest.mark.parametrize('src_value', INVALID_VALUES)
def test_invalid_values_on_transactions(hook, src_value):
    acct = paypal_account_for_id(src_value)
    txn = testutil.Transaction(**{TEST_KEY: src_value}, postings=[
        ('Income:Donations', -25),
        (acct, 25),
    ])
    actual = {error.message for error in hook.run(txn)}
    assert actual == {INVALID_MSG(acct, src_value)}

@pytest.mark.parametrize('src_value,acct', testutil.combine_values(
    testutil.NON_STRING_METADATA_VALUES,
    ACCOUNTS,
))
def test_bad_type_values_on_transactions(hook, src_value, acct):
    txn = testutil.Transaction(**{TEST_KEY: src_value}, postings=[
        ('Income:Donations', -25),
        (acct, 25),
    ])
    actual = {error.message for error in hook.run(txn)}
    assert actual == {BAD_TYPE_MSG(acct, type(src_value).__name__)}

@pytest.mark.parametrize('src_value', VALID_INVOICE_IDS)
def test_invoice_ids_not_accepted_for_non_accruals(hook, src_value):
    acct = 'Assets:PayPal'
    txn = testutil.Transaction(**{TEST_KEY: src_value}, postings=[
        ('Income:Donations', -25),
        (acct, 25),
    ])
    actual = {error.message for error in hook.run(txn)}
    assert actual == {INVALID_MSG(acct, src_value)}

@pytest.mark.parametrize('src_value', VALID_TXN_IDS)
def test_transaction_ids_not_accepted_for_accruals(hook, src_value):
    acct = 'Assets:Receivable:Accounts'
    txn = testutil.Transaction(**{TEST_KEY: src_value}, postings=[
        ('Income:Donations', -25),
        (acct, 25),
    ])
    actual = {error.message for error in hook.run(txn)}
    assert actual == {INVALID_MSG(acct, src_value)}

def test_required_for_assets_paypal(hook):
    acct = 'Assets:PayPal'
    txn = testutil.Transaction(postings=[
        ('Income:Donations', -35),
        (acct, 35),
    ])
    actual = {error.message for error in hook.run(txn)}
    assert actual == {f"{acct} missing {TEST_KEY}"}

@pytest.mark.parametrize('txn_id,inv_id', testutil.combine_values(
    VALID_TXN_IDS,
    VALID_INVOICE_IDS,
))
def test_invoice_payment_transaction_ok(hook, txn_id, inv_id):
    txn = testutil.Transaction(**{TEST_KEY: txn_id}, postings=[
        ('Assets:Receivable:Accounts', -100, {TEST_KEY: inv_id}),
        ('Assets:PayPal', 97),
        ('Expenses:BankingFees', 3),
    ])
    assert not list(hook.run(txn))

def test_not_required_on_opening(hook):
    txn = testutil.Transaction(postings=[
        ('Assets:PayPal', 1000),
        (next(testutil.OPENING_EQUITY_ACCOUNTS), -1000),
    ])
    assert not list(hook.run(txn))

def test_still_required_on_flagged_txn(hook):
    txn = testutil.Transaction(flag='!', postings=[
        ('Assets:PayPal', 1000),
        ('Income:Donations', -1000),
    ])
    assert list(hook.run(txn))