# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1
# Sub 2 — Part Data Model Overhaul. Runs on upgrade from < 19.0.9.0.0.
# Idempotent (NULL / empty guards). Safe to re-run.

import logging

_logger = logging.getLogger(__name__)


def migrate(cr, version):
    if not version:
        return  # Fresh install — nothing to migrate

    _logger.info("Sub 2: starting part-data-model migration to %s", version)

    # Step 1: Backfill part_number from name where empty
    cr.execute("""
        UPDATE fp_part_catalog
        SET    part_number = name
        WHERE  part_number IS NULL OR part_number = ''
    """)
    _logger.info("Sub 2: backfilled part_number on %d records", cr.rowcount)

    # Step 2: Backfill revision with 'A' where empty
    cr.execute("""
        UPDATE fp_part_catalog
        SET    revision = 'A'
        WHERE  revision IS NULL OR revision = ''
    """)
    _logger.info("Sub 2: backfilled revision on %d records", cr.rowcount)

    # Step 3: Split fp_sale_description_template.description into two columns
    # Copy existing description into BOTH internal_description and
    # customer_facing_description. Estimators split them later.
    cr.execute("""
        UPDATE fp_sale_description_template
        SET    internal_description         = description,
               customer_facing_description  = description
        WHERE  description IS NOT NULL
          AND  description <> ''
          AND  (internal_description IS NULL OR internal_description = '')
    """)
    _logger.info(
        "Sub 2: duplicated description into new columns on %d template rows",
        cr.rowcount,
    )

    # Step 4: Backfill x_fc_internal_description on sale.order.line
    # Copy the existing `name` (Odoo's line description) into internal so
    # historical lines satisfy the required-field check when it flips.
    cr.execute("""
        UPDATE sale_order_line
        SET    x_fc_internal_description = name
        WHERE  x_fc_internal_description IS NULL OR x_fc_internal_description = ''
    """)
    _logger.info(
        "Sub 2: backfilled x_fc_internal_description on %d SO lines",
        cr.rowcount,
    )

    # Step 5: Default certificate_requirement to 'inherit' on any rows
    # where it's NULL (shouldn't happen given Odoo default=, but defensive).
    cr.execute("""
        UPDATE fp_part_catalog
        SET    certificate_requirement = 'inherit'
        WHERE  certificate_requirement IS NULL
    """)
    _logger.info(
        "Sub 2: defaulted certificate_requirement to 'inherit' on %d parts",
        cr.rowcount,
    )

    # Step 6: Drop legacy description column (all reads migrated to new fields).
    # Runs after Steps 3 duplicated data into internal_description +
    # customer_facing_description. Idempotent via IF EXISTS.
    cr.execute("""
        ALTER TABLE fp_sale_description_template
        DROP COLUMN IF EXISTS description
    """)
    _logger.info("Sub 2: dropped legacy description column")

    _logger.info("Sub 2: migration complete")