"""Seed: genau ein systemknoten-Datensatz mit typ='haupt' (Sprintplan E6)

Revision ID: 0002_seed_hauptserver
Revises: 0001_initial_schema
Create Date: 2026-09-03
"""
from typing import Sequence, Union

from alembic import op

revision: str = "0002_seed_hauptserver"
down_revision: Union[str, None] = "0001_initial_schema"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.execute(
        "INSERT INTO systemknoten (name, typ) VALUES ('Hauptserver', 'haupt') "
        "ON CONFLICT (name) DO NOTHING;"
    )


def downgrade() -> None:
    op.execute("DELETE FROM systemknoten WHERE name = 'Hauptserver' AND typ = 'haupt';")