"""Hourly rollup table for plugin_metrics

Adds plugin_metrics_hourly — the coarse series that retention rolls raw
plugin_metrics into before pruning them, so multi-day/week host history stays
cheap to store. One row per (source_module, resource_name, metric_name, hour);
the unique constraint is the conflict target for the idempotent rollup upsert.

Revision ID: 0024_plugin_metrics_hourly
Revises: 0023_plugin_metrics_indexes
Create Date: 2026-06-20
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0024_plugin_metrics_hourly"
down_revision: Union[str, None] = "0023_plugin_metrics_indexes"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "plugin_metrics_hourly",
        sa.Column("id", sa.String(length=36), nullable=False),
        sa.Column("source_module", sa.String(length=64), nullable=False),
        sa.Column("resource_name", sa.String(length=255), nullable=False),
        sa.Column("metric_name", sa.String(length=128), nullable=False),
        sa.Column("bucket", sa.DateTime(timezone=True), nullable=False),
        sa.Column("value_avg", sa.Float(), nullable=False, server_default="0"),
        sa.Column("value_max", sa.Float(), nullable=False, server_default="0"),
        sa.Column("sample_count", sa.Integer(), nullable=False, server_default="0"),
        sa.PrimaryKeyConstraint("id"),
        sa.UniqueConstraint("source_module", "resource_name", "metric_name", "bucket",
                            name="uq_plugin_metrics_hourly_bucket"),
    )
    op.create_index("ix_plugin_metrics_hourly_lookup", "plugin_metrics_hourly",
                    ["source_module", "resource_name", "metric_name", "bucket"])


def downgrade() -> None:
    op.drop_index("ix_plugin_metrics_hourly_lookup", table_name="plugin_metrics_hourly")
    op.drop_table("plugin_metrics_hourly")