"""Traefik extended stats: bandwidth, certs, global stats

Revision ID: traefik_002_stats
Revises: traefik_001_initial
Create Date: 2026-03-19
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "traefik_002_stats"
down_revision: Union[str, None] = "traefik_001_initial"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "traefik_metrics",
        sa.Column("response_bytes_rate", sa.Float, nullable=False, server_default="0"),
    )

    op.create_table(
        "traefik_certs",
        sa.Column("serial", sa.String(255), primary_key=True),
        sa.Column("cn", sa.String(512), nullable=True),
        sa.Column("sans", sa.Text, nullable=True),
        sa.Column("not_after", sa.DateTime(timezone=True), nullable=False),
        sa.Column("scraped_at", sa.DateTime(timezone=True), nullable=False),
    )

    op.create_table(
        "traefik_global_stats",
        sa.Column("id", sa.String(36), primary_key=True),
        sa.Column("scraped_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("open_conns_total", sa.Float, nullable=True),
        sa.Column("config_reloads_total", sa.Float, nullable=True),
        sa.Column("config_last_reload_success", sa.Float, nullable=True),
        sa.Column("process_memory_bytes", sa.Float, nullable=True),
    )
    op.create_index("ix_traefik_global_stats_scraped", "traefik_global_stats", ["scraped_at"])


def downgrade() -> None:
    op.drop_index("ix_traefik_global_stats_scraped", "traefik_global_stats")
    op.drop_table("traefik_global_stats")
    op.drop_table("traefik_certs")
    op.drop_column("traefik_metrics", "response_bytes_rate")