"""Add user_id FK to locations table.

Revision ID: 032
Revises: 031
Create Date: 2026-02-26
"""
from alembic import op
import sqlalchemy as sa

revision = "032"
down_revision = "031"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.add_column("locations", sa.Column("user_id", sa.Integer(), nullable=True))
    op.execute(
        "UPDATE locations SET user_id = ("
        "  SELECT id FROM users WHERE role = 'admin' ORDER BY id LIMIT 1"
        ")"
    )
    op.create_foreign_key(
        "fk_locations_user_id", "locations", "users",
        ["user_id"], ["id"], ondelete="CASCADE"
    )
    op.alter_column("locations", "user_id", nullable=False)
    op.create_index("ix_locations_user_id", "locations", ["user_id"])


def downgrade() -> None:
    op.drop_index("ix_locations_user_id", table_name="locations")
    op.drop_constraint("fk_locations_user_id", "locations", type_="foreignkey")
    op.drop_column("locations", "user_id")