"""add target_mode to notifications

Revision ID: 20260416_0003
Revises: 20260416_0002
Create Date: 2026-04-16
"""

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = "20260416_0003"
down_revision: Union[str, Sequence[str], None] = "20260416_0002"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "notifications",
        sa.Column(
            "target_mode",
            sa.String(32),
            nullable=False,
            server_default="all_users",
        ),
    )
    op.execute(
        "ALTER TABLE notifications ADD CONSTRAINT ck_notifications_target_mode "
        "CHECK (target_mode IN ('new_users', 'exist_users', 'all_users', 'user_ids'))"
    )


def downgrade() -> None:
    op.execute("ALTER TABLE notifications DROP CONSTRAINT ck_notifications_target_mode")
    op.drop_column("notifications", "target_mode")