"""add transaction splits

Revision ID: 7b535ef9e189
Revises: 3e3503b61b20
Create Date: 2026-08-30 15:00:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '7b535ef9e189'
down_revision: Union[str, None] = '3e3503b61b20'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        'transaction_splits',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('transaction_id', sa.Integer(), nullable=False),
        sa.Column('category_id', sa.Integer(), nullable=True),
        sa.Column('amount', sa.Numeric(precision=14, scale=2), nullable=False),
        sa.Column('note', sa.String(length=200), nullable=True),
        sa.ForeignKeyConstraint(['transaction_id'], ['transactions.id'], ondelete='CASCADE'),
        sa.ForeignKeyConstraint(['category_id'], ['categories.id'], ondelete='SET NULL'),
        sa.PrimaryKeyConstraint('id'),
    )


def downgrade() -> None:
    op.drop_table('transaction_splits')