"""Add Phase 3 tables

Revision ID: b2c3d4e5f6g7
Revises: a1b2c3d4e5f6
Create Date: 2025-12-09 17:30:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'b2c3d4e5f6g7'
down_revision: Union[str, Sequence[str], None] = 'a1b2c3d4e5f6'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Upgrade schema for Phase 3."""
    
    # Create notifications table
    op.create_table(
        'notifications',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.Column('tenant_id', sa.Integer(), nullable=False),
        sa.Column('title', sa.String(), nullable=False),
        sa.Column('message', sa.Text(), nullable=False),
        sa.Column('notification_type', sa.String(), nullable=False),
        sa.Column('is_read', sa.Boolean(), nullable=False),
        sa.Column('link', sa.String(), nullable=True),
        sa.Column('created_at', sa.DateTime(), nullable=True),
        sa.ForeignKeyConstraint(['tenant_id'], ['tenants.id'], ),
        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
        sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_notifications_id'), 'notifications', ['id'], unique=False)
    op.create_index(op.f('ix_notifications_created_at'), 'notifications', ['created_at'], unique=False)


def downgrade() -> None:
    """Downgrade schema for Phase 3."""
    
    # Drop notifications table
    op.drop_index(op.f('ix_notifications_created_at'), table_name='notifications')
    op.drop_index(op.f('ix_notifications_id'), table_name='notifications')
    op.drop_table('notifications')