"""Phase 18 Automatic Source Driven Stock Item Voucher Engine.

Revision ID: 20260823_auto_stock_voucher_p18
Revises: 20260823_native_voucher_engine_p17
"""
from alembic import op
import sqlalchemy as sa


revision = "20260823_auto_stock_voucher_p18"
down_revision = "20260823_native_voucher_engine_p17"
branch_labels = None
depends_on = None


def upgrade():
    op.create_table(
        "accounting_voucher_item_lines",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column(
            "draft_id",
            sa.Integer(),
            sa.ForeignKey("accounting_voucher_drafts.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("line_no", sa.Integer(), nullable=False, server_default="1"),
        sa.Column("stock_item_name", sa.String(255), nullable=False),
        sa.Column("hsn_sac", sa.String(30), nullable=False, server_default=""),
        sa.Column("quantity", sa.Float(), nullable=False, server_default="0"),
        sa.Column("unit", sa.String(40), nullable=False, server_default=""),
        sa.Column("rate", sa.Float(), nullable=False, server_default="0"),
        sa.Column("amount", sa.Float(), nullable=False, server_default="0"),
        sa.Column("dr_cr", sa.String(2), nullable=False),
        sa.Column("accounting_ledger_name", sa.String(255), nullable=False, server_default=""),
        sa.Column("godown_name", sa.String(255), nullable=False, server_default=""),
        sa.Column("source_item_json", sa.Text(), nullable=False, server_default="{}"),
    )
    op.create_index(
        "ix_accounting_voucher_item_lines_draft_id",
        "accounting_voucher_item_lines",
        ["draft_id"],
    )
    op.create_index(
        "ix_accounting_voucher_item_lines_stock_item_name",
        "accounting_voucher_item_lines",
        ["stock_item_name"],
    )
    op.create_index(
        "ix_accounting_voucher_item_lines_hsn_sac",
        "accounting_voucher_item_lines",
        ["hsn_sac"],
    )


def downgrade():
    op.drop_table("accounting_voucher_item_lines")