"""add racks table and rack_id to devices

Revision ID: 0003
Revises: 0002
Create Date: 2026-04-07
"""

from alembic import op
import sqlalchemy as sa

revision = "0003"
down_revision = "0002"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "racks",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column(
            "object_id",
            sa.Integer(),
            sa.ForeignKey("objects.id", ondelete="CASCADE"),
            nullable=False,
            index=True,
        ),
        sa.Column("name", sa.String(100), nullable=False),
        sa.Column("description", sa.Text(), nullable=True),
        sa.Column("location", sa.String(200), nullable=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("NOW()"),
            nullable=False,
        ),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("NOW()"),
            nullable=False,
        ),
    )

    op.add_column(
        "devices",
        sa.Column(
            "rack_id",
            sa.Integer(),
            sa.ForeignKey("racks.id", ondelete="SET NULL"),
            nullable=True,
            index=True,
        ),
    )


def downgrade() -> None:
    op.drop_column("devices", "rack_id")
    op.drop_table("racks")