"""add notifications table

Revision ID: d4e5f6a7b8c9
Revises: c3d4e5f6a7b8
Create Date: 2026-07-22 11:00:00.000000
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = 'd4e5f6a7b8c9'
down_revision: Union[str, None] = 'c3d4e5f6a7b8'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        'notifications',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.Column('actor_id', sa.Integer(), nullable=True),
        sa.Column('ntype', sa.String(length=32), nullable=False, server_default='comment'),
        sa.Column('title', sa.String(length=200), nullable=False),
        sa.Column('content', sa.String(length=500), nullable=False, server_default=''),
        sa.Column('link', sa.String(length=255), nullable=False, server_default=''),
        sa.Column('is_read', sa.Boolean(), nullable=False, server_default=sa.text('0')),
        sa.Column('created_at', sa.DateTime(), server_default=sa.func.now(), nullable=True),
        sa.ForeignKeyConstraint(['user_id'], ['users.id']),
        sa.PrimaryKeyConstraint('id'),
    )
    op.create_index('ix_notifications_id', 'notifications', ['id'])
    op.create_index('ix_notifications_user_id', 'notifications', ['user_id'])


def downgrade() -> None:
    op.drop_index('ix_notifications_user_id', table_name='notifications')
    op.drop_index('ix_notifications_id', table_name='notifications')
    op.drop_table('notifications')