"""The mixed-glazing reclassify maps a flattened aggregate mix onto MIXED, leaves
uniform / already-correct rows alone, and is idempotent (#1376 / ADR-0042)."""

from __future__ import annotations

from scripts.reclassify_mixed_glazing import mixed_glazing_corrections


def test_flattened_mix_rows_are_corrected_to_mixed() -> None:
    # Arrange — an aggregate mix flattened to Double (the bug), a near-uniform mix
    # and a clean uniform row (both correctly Double), and a pure single row.
    stored = [
        ("40% double glazing 2002 or later, 60% single glazing", "Double glazing, 2002 or later"),
        ("96% double glazing 2002 or later, 4% single glazing", "Double glazing, 2002 or later"),
        ("100% double glazing 2002 or later", "Double glazing, 2002 or later"),
        ("100% single glazing", "Single glazing"),
    ]

    # Act
    corrections = mixed_glazing_corrections(stored)

    # Assert — only the genuine mix is re-mapped; near-uniform and uniform stay.
    assert corrections == {
        "40% double glazing 2002 or later, 60% single glazing": "Mixed glazing"
    }


def test_already_mixed_rows_need_no_change() -> None:
    # Act / Assert — idempotent.
    assert (
        mixed_glazing_corrections(
            [("40% double glazing 2002 or later, 60% single glazing", "Mixed glazing")]
        )
        == {}
    )