"""plausible — pre-op seed hooks (Phase 1e HC3). Marker is a `ci_marker` row in the metadata postgres
(`db` service; POSTGRES_USER/DB/PASSWORD are plausible/plausible/plausible, read from the container's
own env). plausible's recipe backs up postgres via a real pg_dump hook (backupbot pre-hook pg_dump -Fc
| gzip; restore post-hook pg_restore --clean), so the marker survives backup→restore."""

import os
import sys

sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "runner"))
from harness import lifecycle  # noqa: E402


def _psql(domain, sql):
    cmd = f'PGPASSWORD="$POSTGRES_PASSWORD" psql -U "$POSTGRES_USER" -d "$POSTGRES_DB" -tAc "{sql}"'
    return lifecycle.exec_in_app(domain, ["sh", "-c", cmd], service="db").strip()


def _seed(domain, value):
    _psql(
        domain,
        "CREATE TABLE IF NOT EXISTS ci_marker(v text); DELETE FROM ci_marker; "
        f"INSERT INTO ci_marker VALUES('{value}');",
    )
    assert _psql(domain, "SELECT v FROM ci_marker;") == value


def pre_upgrade(domain, meta):
    _seed(domain, "upgrade-survives")


def pre_backup(domain, meta):
    _seed(domain, "original")


def pre_restore(domain, meta):
    _psql(domain, "DROP TABLE ci_marker;")
    assert _psql(domain, "SELECT to_regclass('public.ci_marker');") in ("", "NULL"), "drop did not take"