"""What each learned metric usually does in each time slot (#5739).

Revision ID: 0045_metric_norms
Revises: 0044_hourly_p95
Create Date: 2026-10-14
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "0045_metric_norms"
down_revision: Union[str, None] = "0044_hourly_p95"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "metric_norms",
        sa.Column("source_module", sa.String(64), primary_key=True),
        sa.Column("resource_name", sa.String(255), primary_key=True),
        sa.Column("metric_name", sa.String(128), primary_key=True),
        sa.Column("slot", sa.SmallInteger, primary_key=True),
        sa.Column("kind", sa.String(8), nullable=False),
        sa.Column("usual_hold", sa.Float, nullable=False),
        sa.Column("usual_peak", sa.Float, nullable=False),
        sa.Column("days_seen", sa.Integer, nullable=False),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
    )


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