"""public ip monitor tables

Revision ID: 20260429_05_public_ip_monitor
Revises: 20260420_04_app_config_table
Create Date: 2026-04-29 00:00:01.000000
"""

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = "20260429_05_public_ip_monitor"
down_revision: Union[str, None] = "20260420_04_app_config_table"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "public_ip_history",
        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
        sa.Column("ipv4", sa.String(length=45), nullable=False),
        sa.Column("observed_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("change_type", sa.String(length=32), nullable=False),
        sa.Column("provider", sa.String(length=64), nullable=True),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index(
        "ix_public_ip_history_observed_at",
        "public_ip_history",
        ["observed_at"],
        unique=False,
    )

    op.create_table(
        "public_ip_state",
        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
        sa.Column("current_ipv4", sa.String(length=45), nullable=False),
        sa.Column("previous_ipv4", sa.String(length=45), nullable=True),
        sa.Column("first_seen_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("last_checked_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("last_changed_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("last_check_status", sa.String(length=32), nullable=False),
        sa.Column("last_check_error", sa.String(length=255), nullable=True),
        sa.Column("last_provider", sa.String(length=64), nullable=True),
        sa.PrimaryKeyConstraint("id"),
    )


def downgrade() -> None:
    op.drop_table("public_ip_state")
    op.drop_index("ix_public_ip_history_observed_at", table_name="public_ip_history")
    op.drop_table("public_ip_history")