# plugins/traefik/migrations/versions/traefik_001_initial.py
"""Traefik metrics table

Revision ID: traefik_001_initial
Revises: (none — this is a branch off the core head via depends_on)
Create Date: 2026-03-17
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "traefik_001_initial"
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = "traefik"
depends_on: Union[str, Sequence[str], None] = ("0004_app_settings",)


def upgrade() -> None:
    op.create_table(
        "traefik_metrics",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("router_name", sa.String(255), nullable=False),
        sa.Column("scraped_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("request_rate", sa.Float, nullable=False),
        sa.Column("error_rate_4xx_pct", sa.Float, nullable=False),
        sa.Column("error_rate_5xx_pct", sa.Float, nullable=False),
        sa.Column("latency_p50_ms", sa.Float, nullable=False),
        sa.Column("latency_p95_ms", sa.Float, nullable=False),
        sa.Column("latency_p99_ms", sa.Float, nullable=False),
    )
    op.create_index("ix_traefik_metrics_router_scraped", "traefik_metrics",
                    ["router_name", "scraped_at"])


def downgrade() -> None:
    op.drop_index("ix_traefik_metrics_router_scraped", "traefik_metrics")
    op.drop_table("traefik_metrics")