"""Docker host status

Adds docker_host_status: per host, whether Docker answered at the agent's
last report (ok / unavailable / error) and why not. Lets Steward show a host
whose Docker went away as such, instead of its last containers as running
(#5152). Additive create_table.

Revision ID: docker_011_host_status
Revises: docker_010_swarm_tasks
Create Date: 2026-10-06
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "docker_011_host_status"
down_revision: Union[str, None] = "docker_010_swarm_tasks"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "docker_host_status",
        sa.Column("host_id", sa.String(length=36), nullable=False),
        sa.Column("status", sa.String(length=16), nullable=False),
        sa.Column("detail", sa.String(length=255), nullable=True),
        sa.Column("since", sa.DateTime(timezone=True), nullable=False),
        sa.Column("reported_at", sa.DateTime(timezone=True), nullable=False),
        sa.ForeignKeyConstraint(["host_id"], ["hosts.id"], ondelete="CASCADE"),
        sa.PrimaryKeyConstraint("host_id"),
    )


def downgrade() -> None:
    op.drop_table("docker_host_status")