"""Docker container logs table

Adds docker_logs — one row per container log line, pushed by the host agent and
folded into its metrics push. Time-series, host-scoped (container names are only
unique within a host). Bounded by a per-container size+age ring in retention, so
a chatty container keeps a shorter window rather than growing without limit.
Additive create_table + twin indexes (viewer lookup by (host, container, ts);
age-cutoff prune by ts).

Revision ID: docker_009_container_logs
Revises: docker_008_bigint_mem
Create Date: 2026-07-19
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "docker_009_container_logs"
down_revision: Union[str, None] = "docker_008_bigint_mem"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "docker_logs",
        sa.Column("id", sa.String(length=36), nullable=False),
        sa.Column("host_id", sa.String(length=36), nullable=False),
        sa.Column("container_name", sa.String(length=255), nullable=False),
        sa.Column("ts", sa.DateTime(timezone=True), nullable=False),
        sa.Column("stream", sa.String(length=8), nullable=False, server_default="stdout"),
        sa.Column("line", sa.Text(), nullable=False, server_default=""),
        sa.ForeignKeyConstraint(["host_id"], ["hosts.id"], ondelete="CASCADE"),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index("ix_docker_logs_host_id", "docker_logs", ["host_id"])
    op.create_index("ix_docker_logs_container_name", "docker_logs", ["container_name"])
    op.create_index("ix_docker_logs_host_container_time",
                    "docker_logs", ["host_id", "container_name", "ts"])
    op.create_index("ix_docker_logs_ts", "docker_logs", ["ts"])


def downgrade() -> None:
    op.drop_index("ix_docker_logs_ts", table_name="docker_logs")
    op.drop_index("ix_docker_logs_host_container_time", table_name="docker_logs")
    op.drop_index("ix_docker_logs_container_name", table_name="docker_logs")
    op.drop_index("ix_docker_logs_host_id", table_name="docker_logs")
    op.drop_table("docker_logs")