# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
"""Name-match existing fp_receiving.carrier_name → x_fc_carrier_id.

Phase A of the shipping integration replaces the free-text carrier
field with a Many2one to delivery.carrier. Existing records (16 on
entech at write time) have free-text values like "FedEx", "Purolator"
in carrier_name. This migration walks them and populates the new M2O
when a unique case-insensitive name match exists.

delivery.carrier.name is jsonb (translatable) in Odoo 19 — match
strips to the en_US translation. Ambiguous values stay as text in
carrier_name for the operator to pick manually.
"""

import logging

_logger = logging.getLogger(__name__)


def migrate(cr, version):
    # Skip if the field doesn't exist yet (defensive — the column is
    # added by the registry update that runs before post-migrate).
    cr.execute("""
        SELECT 1
          FROM information_schema.columns
         WHERE table_name = 'fp_receiving'
           AND column_name = 'x_fc_carrier_id'
    """)
    if not cr.fetchone():
        _logger.warning('x_fc_carrier_id column not present — skip.')
        return

    cr.execute("""
        UPDATE fp_receiving r
           SET x_fc_carrier_id = dc.id
          FROM delivery_carrier dc
         WHERE r.carrier_name IS NOT NULL
           AND r.carrier_name <> ''
           AND r.x_fc_carrier_id IS NULL
           AND LOWER(TRIM(r.carrier_name)) =
               LOWER(TRIM((dc.name->>'en_US')))
    """)
    matched = cr.rowcount
    _logger.info(
        'Receiving carrier migration: matched %d record(s) by name.',
        matched,
    )