"""Seed the routing rules: every missing event type enabled, immediate, digest 07:00, to PS-Admins.

Idempotent. An existing rule is never touched, so the Admin's choices stand.
"""

from __future__ import annotations

from typing import Any

from ..auth.groups import ADMIN_GROUP
from ..settings import Settings
from .catalog import EVENT_TYPES


def admins_dn(settings: Settings) -> str:
    base = settings.ldap_group_base_dn.strip()
    return f"CN={ADMIN_GROUP},{base}" if base else f"CN={ADMIN_GROUP}"


def seed(conn: Any, settings: Settings) -> list[str]:
    """Insert the missing rules. Returns the event types it inserted."""
    added: list[str] = []
    with conn.transaction():
        for key, et in EVENT_TYPES.items():
            row = conn.execute(
                "INSERT INTO notification_rules (event_type, enabled, delivery, digest_time, param)"
                " VALUES (%s, true, 'immediate', '07:00', %s) ON CONFLICT (event_type) DO NOTHING RETURNING event_type",
                (key, et.param_default),
            ).fetchone()
            if row is None:
                continue
            conn.execute(
                "INSERT INTO notification_recipients (event_type, kind, group_dn, group_name)"
                " VALUES (%s, 'group', %s, %s)",
                (key, admins_dn(settings), ADMIN_GROUP),
            )
            added.append(key)
    return added