"""add volume_expected and atg volumes to penerimaan_item

Revision ID: ab12cd34ef56
Revises: z2d3e4f5g6h7
Create Date: 2026-04-19

- volume_expected: user-declared expected volume from DO (drives penebusan deduction)
- atg_volume_sebelum / atg_volume_sesudah: computed from ATG mm readings via calibration
"""

from alembic import op
import sqlalchemy as sa

revision = 'ab12cd34ef56'
down_revision = ('z2d3e4f5g6h7', '2233d47e33a5')
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.add_column('penerimaan_item', sa.Column('volume_expected', sa.Numeric(15, 3), nullable=True))
    op.add_column('penerimaan_item', sa.Column('atg_volume_sebelum', sa.Numeric(15, 3), nullable=True))
    op.add_column('penerimaan_item', sa.Column('atg_volume_sesudah', sa.Numeric(15, 3), nullable=True))


def downgrade() -> None:
    op.drop_column('penerimaan_item', 'atg_volume_sesudah')
    op.drop_column('penerimaan_item', 'atg_volume_sebelum')
    op.drop_column('penerimaan_item', 'volume_expected')