"""unit test: calculate_priority ranks MSRP-less products instead of burying them

run from the repo root:
    uv run --with pytest pytest tests/test_alert_priority.py

pure and offline — passes plain dicts shaped like product documents; touches no
Mongo. The claim query sorts priority descending, so a priority of 0 means an
alert is only drained once everything else is.
"""

from monitor_utils.database import NO_MSRP_PRIORITY, calculate_priority


def document(current, original, **overrides) -> dict:
    doc = {"_id": "p1", "currentPrice": current, "originalPrice": original}
    doc.update(overrides)
    return doc


def test_no_msrp_takes_its_own_rank():
    assert calculate_priority(document(50.0, 50.0, hasMsrp=False)) == NO_MSRP_PRIORITY


def test_no_msrp_rank_sits_directly_under_the_seventy_band():
    """It must outrank every sub-70% product and lose to every 70%+ one."""
    assert calculate_priority(document(25.0, 100.0)) == 7  # 75% off
    assert NO_MSRP_PRIORITY < 7
    assert NO_MSRP_PRIORITY > calculate_priority(document(45.0, 100.0))  # 55% off


def test_msrp_products_are_unaffected():
    assert calculate_priority(document(25.0, 100.0, hasMsrp=True)) == 7
    assert calculate_priority(document(50.0, 100.0, hasMsrp=True)) == 5


def test_documents_without_the_field_keep_the_percentage_path():
    """Documents written before hasMsrp existed must not all jump the queue."""
    assert calculate_priority(document(50.0, 100.0)) == 5
    assert calculate_priority(document(100.0, 100.0)) == 0


def test_broken_prices_still_outrank_nothing():
    """A missing or zero original price is a data defect, not a missing MSRP."""
    assert calculate_priority(document(50.0, None, hasMsrp=False)) == 0
    assert calculate_priority(document(50.0, 0, hasMsrp=False)) == 0
    assert calculate_priority(document(None, 100.0, hasMsrp=False)) == 0