"""stations.camera_url e stations.camera_source (#72)

stations.camera_url: servizio camera della stazione (vs-gui o equivalente).
stations.camera_source: sorgente da chiedere al servizio, es. camera:<seriale>
o camera:folder.

Revision ID: 020_station_camera
Revises: 019_station_vision_worker
Create Date: 2026-10-15

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = '020_station_camera'
down_revision: Union[str, None] = '019_station_vision_worker'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # batch_alter_table come nelle migrazioni vicine: serve a SQLite
    with op.batch_alter_table('stations') as batch:
        batch.add_column(sa.Column('camera_url', sa.String(500), nullable=True))
        batch.add_column(sa.Column('camera_source', sa.String(200), nullable=True))


def downgrade() -> None:
    with op.batch_alter_table('stations') as batch:
        batch.drop_column('camera_source')
        batch.drop_column('camera_url')