"""Tests for the runtime PCDB lookup module.

The lookup loads pcdb_table_105_gas_oil_boilers.jsonl at import time and
caches it as a by-pcdb-id dict. Callers (cert_to_inputs) invoke
`gas_oil_boiler_record(pcdb_id)` to obtain the typed record or None when
the ID is not in the PCDB.

Reference: BRE PCDB pcdb10.dat (April 2026); user-verified records.
"""

from __future__ import annotations

from domain.sap10_calculator.tables.pcdb import gas_oil_boiler_record


def test_gas_oil_boiler_record_returns_verified_baxi_98() -> None:
    """Baxi Heating Wm 20/3rs (user-verified against ncm-pcdb.org.uk):
    winter SAP seasonal efficiency 66.0%, summer 56.0%, comparative HW
    40.8%. Lookup by `main_heating_index_number = 98` returns the typed
    record."""
    # Arrange
    # Act
    record = gas_oil_boiler_record(98)

    # Assert
    assert record is not None
    assert record.brand_name == "Baxi Heating"
    assert record.model_name == "Wm"
    assert record.winter_efficiency_pct == 66.0
    assert record.summer_efficiency_pct == 56.0


def test_gas_oil_boiler_record_returns_none_for_unknown_pcdb_id() -> None:
    """`main_heating_index_number` values not in Table 105 return None so
    `cert_to_inputs` can fall back to the Table 4a/4b category default."""
    # Arrange
    # Act
    record = gas_oil_boiler_record(99999999)

    # Assert
    assert record is None