"""Phase 6 verification for the URL-keyed engine and session-factory registries.

Covers [MED-04]: replacing `functools.cache` with an explicit registry so that
disposing one database's engine cannot silently tear down every other one.
"""

import pytest

from transcription.db.engine import dispose_engine
from transcription.db.engine import get_engine
from transcription.db.session import dispose_session_factory
from transcription.db.session import get_session_factory

URL_A = "sqlite+aiosqlite:///./.registry-test-a.db"
URL_B = "sqlite+aiosqlite:///./.registry-test-b.db"


@pytest.mark.asyncio
async def test_distinct_urls_produce_distinct_engines_and_eviction_is_targeted():
    engine_a = get_engine(URL_A)
    engine_b = get_engine(URL_B)

    assert engine_a is not engine_b
    assert get_engine(URL_A) is engine_a

    await dispose_engine(URL_A)

    assert get_engine(URL_B) is engine_b, "disposing one URL must not evict the others"
    assert get_engine(URL_A) is not engine_a, "the disposed URL must be rebuilt on demand"

    await dispose_engine(URL_A)
    await dispose_engine(URL_B)


@pytest.mark.asyncio
async def test_disposing_an_unregistered_url_is_a_noop():
    await dispose_engine("sqlite+aiosqlite:///./.registry-test-never-created.db")


@pytest.mark.asyncio
async def test_session_factory_eviction_is_targeted():
    factory_a = get_session_factory(URL_A)
    factory_b = get_session_factory(URL_B)

    assert factory_a is not factory_b

    await dispose_session_factory(URL_A)

    assert get_session_factory(URL_B) is factory_b
    assert get_session_factory(URL_A) is not factory_a

    await dispose_session_factory(URL_A)
    await dispose_session_factory(URL_B)