"""add exposed_entity_toggle table

Revision ID: 20260622_10_exposed_entities
Revises: 20260622_09_modbus_tables
Create Date: 2026-06-22 00:00:00.000000
"""

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op


revision: str = "20260622_10_exposed_entities"
down_revision: Union[str, None] = "20260622_09_modbus_tables"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # exposed_entity_toggle — per-entity on/off switch for MQTT / HA Discovery.
    op.create_table(
        "exposed_entity_toggle",
        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
        sa.Column("key", sa.String(length=255), nullable=False),
        sa.Column("enabled", sa.Boolean(), nullable=False),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
        sa.PrimaryKeyConstraint("id"),
        sa.UniqueConstraint("key", name="uq_exposed_entity_toggle_key"),
    )

    # Index on key for fast single-key lookups (toggle by key).
    op.create_index(
        "ix_exposed_entity_toggle_key",
        "exposed_entity_toggle",
        ["key"],
        unique=True,
    )


def downgrade() -> None:
    # Drop index then table — only removes what this revision created.
    op.drop_index("ix_exposed_entity_toggle_key", table_name="exposed_entity_toggle")
    op.drop_table("exposed_entity_toggle")
