"""ghost — pre-op seed hooks (Phase 1e HC3 / Phase 2 P4 backup data-integrity).

The orchestrator runs these BEFORE each op; the matching test_<op>.py asserts post-op (assertion
only). The CURRENT ghost recipe (1.2.0+6.21.2-alpine) stores ALL its content — posts, users,
settings — in a **MySQL** `ghost` database (compose `db` service, `mysql:8.0`), NOT sqlite (the
older recipe_meta comment was stale; the live compose uses `database__client: mysql`). The recipe's
`db` service is backupbot-labelled with a **logical dump** pre-hook
(`mysqldump -u root -p... ghost --tab /var/lib/mysql-files/`, `backup.path=/var/lib/mysql-files/`),
so the marker must live in the `ghost` database to ride that dump.

We seed a dedicated `ci_marker` table (Ghost's own knex migrations never touch it) via the `mysql`
CLI in the `db` service. MYSQL_PWD (not `-p<pw>`) avoids the client's "password on the command line
is insecure" stderr noise; `-N -s` strips column names + box decoration so read-backs are clean
scalars. The marker rides backup→restore the same way a real post's row would.
"""

import os
import sys

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


def _mysql(domain, sql):
    cmd = 'MYSQL_PWD="$(cat /run/secrets/db_password)" ' f'mysql -u root -N -s ghost -e "{sql}"'
    return lifecycle.exec_in_app(domain, ["sh", "-c", cmd], service="db").strip()


def _seed(domain, value):
    _mysql(
        domain,
        "CREATE TABLE IF NOT EXISTS ci_marker(v VARCHAR(255)); DELETE FROM ci_marker; "
        f"INSERT INTO ci_marker VALUES('{value}');",
    )
    got = _mysql(domain, "SELECT v FROM ci_marker;")
    assert got == value, f"seed did not commit (read back {got!r}, expected {value!r})"


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


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


def pre_restore(domain, meta):
    # diverge from the backup so a successful restore is observable: drop the marker table.
    _mysql(domain, "DROP TABLE IF EXISTS ci_marker;")
    got = _mysql(
        domain,
        "SELECT COUNT(*) FROM information_schema.tables "
        "WHERE table_schema='ghost' AND table_name='ci_marker';",
    )
    assert got == "0", f"drop did not take (information_schema still lists ci_marker: {got!r})"