"""Every Alembic revision id fits alembic_version.version_num, a VARCHAR(32).

A longer id passes every unit test and fails only when the upgrade writes it:
"value too long for type character varying(32)", and the app does not boot
(0035, #5374). The unit lane never migrates, so this reads the files.
"""
import pathlib
import re

REPO = pathlib.Path(__file__).resolve().parents[1]
_REVISION = re.compile(r'^revision(?::[^=]*)?=\s*["\']([^"\']+)["\']', re.M)


def revision_ids() -> dict[str, str]:
    files = [*(REPO / "steward/migrations/versions").glob("*.py"),
             *(REPO / "plugins").glob("*/migrations/versions/*.py")]
    found = {}
    for path in files:
        m = _REVISION.search(path.read_text())
        if m:
            found[str(path.relative_to(REPO))] = m.group(1)
    return found


def test_every_revision_id_fits_version_num():
    ids = revision_ids()
    assert len(ids) >= 30, ids  # core and plugin migrations were found, so the check is real
    too_long = {path: rev for path, rev in ids.items() if len(rev) > 32}
    assert not too_long, f"alembic_version.version_num is VARCHAR(32): {too_long}"