from datetime import date
from typing import List
from ..ir import TaxLot


def fetch_mock_custodian_lots() -> List[TaxLot]:
    """Return a small deterministic set of lots for integration testing.

    In a real adapter this would call custodian APIs and map responses to the
    canonical IR. For Phase-0 we provide a mocked deterministic dataset.
    """
    return [
        TaxLot(id="lotA", acquisition_date=date(2019, 6, 1), basis=100.0, quantity=10, market_value=80.0),
        TaxLot(id="lotB", acquisition_date=date(2020, 1, 15), basis=50.0, quantity=5, market_value=70.0),
        TaxLot(id="lotC", acquisition_date=date(2018, 3, 3), basis=200.0, quantity=2, market_value=150.0),
    ]