"""notification_channels for UI-managed Telegram settings

Revision ID: 004
Revises: 003
"""

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "004"
down_revision: Union[str, None] = "003"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "notification_channels",
        sa.Column("channel", sa.String(length=32), nullable=False),
        sa.Column("enabled", sa.Boolean(), nullable=False, server_default=sa.text("false")),
        sa.Column("min_severity", sa.String(length=16), nullable=False, server_default="warning"),
        sa.Column("bot_token", sa.Text(), nullable=True),
        sa.Column("chat_id", sa.String(length=64), nullable=True),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("now()"),
            nullable=False,
        ),
        sa.PrimaryKeyConstraint("channel"),
    )


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