"""add_notifications_table

Revision ID: b006notifications
Revises: b005v2indexes
Create Date: 2026-02-09 11:00:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID


# revision identifiers, used by Alembic.
revision: str = 'b006notifications'
down_revision: Union[str, Sequence[str], None] = 'b005v2indexes'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Create notifications table."""
    op.create_table(
        'notifications',
        sa.Column('id', UUID(as_uuid=True), primary_key=True, server_default=sa.text('gen_random_uuid()')),
        sa.Column('user_id', UUID(as_uuid=True), sa.ForeignKey('users.id'), nullable=False),
        sa.Column('type', sa.String(), nullable=False),
        sa.Column('title', sa.String(), nullable=False),
        sa.Column('message', sa.Text(), nullable=True),
        sa.Column('entity_type', sa.String(), nullable=True),
        sa.Column('entity_id', UUID(as_uuid=True), nullable=True),
        sa.Column('read', sa.Boolean(), server_default='false'),
        sa.Column('created_at', sa.DateTime(), server_default=sa.func.now()),
    )
    op.create_index('ix_notifications_user_id', 'notifications', ['user_id'])
    op.create_index('ix_notifications_read', 'notifications', ['read'])
    op.create_index('ix_notifications_created_at', 'notifications', ['created_at'])


def downgrade() -> None:
    """Drop notifications table."""
    op.drop_index('ix_notifications_created_at', table_name='notifications')
    op.drop_index('ix_notifications_read', table_name='notifications')
    op.drop_index('ix_notifications_user_id', table_name='notifications')
    op.drop_table('notifications')
