'''
IB historical-data request regressions.

'''
from datetime import (
    UTC,
    datetime,
)
from types import SimpleNamespace

from pendulum import datetime as pdatetime
import pytest
import trio

from piker.brokers.ib.api import Client


@pytest.mark.parametrize(
    ('end_dt', 'expected'),
    [
        (None, ''),
        (
            datetime(2026, 7, 28, 23, 30, tzinfo=UTC),
            '20260728-23:30:00',
        ),
        (
            pdatetime(2026, 7, 28, 23, 30, tz='UTC'),
            '20260728-23:30:00',
        ),
        (
            pdatetime(
                2026,
                7,
                28,
                23,
                30,
                tz='America/New_York',
            ),
            '20260729-03:30:00',
        ),
    ],
)
def test_history_end_datetime_uses_ib_utc_format(
    end_dt: datetime|None,
    expected: str,
) -> None:
    '''
    Reverse history boundaries must use IB's explicit UTC syntax.

    ``ib_async`` adds a trailing ``UTC`` zone to aware datetimes.
    The live IB gateway rejected that form with error 10314 while
    filling an MNQ gap. Invoke ``Client.bars()`` with stdlib and
    Pendulum boundaries, then capture the request kwargs.
    Prove each becomes IB's UTC-dash form while latest requests stay
    blank.

    '''
    request: dict = {}

    class FakeIB:
        async def reqHistoricalDataAsync(self, **kwargs) -> list:
            request.update(kwargs)
            return []

    client = SimpleNamespace(ib=FakeIB())

    async def find_contracts(fqme: str) -> list:
        return [SimpleNamespace()]

    client.find_contracts = find_contracts

    async def main() -> None:
        await Client.bars(
            client,
            fqme='mnq.cme.20260918',
            sample_period_s=60,
            end_dt=end_dt,
        )

    trio.run(main)
    assert request['endDateTime'] == expected