from odoo import api, SUPERUSER_ID

def migrate(cr, version):
    env = api.Environment(cr, SUPERUSER_ID, {})
    sf_shelf_model = env["sf.shelf"]
    sf_shelf_location_model = env["sf.shelf.location"]
    shelves = sf_shelf_model.search([])
    for shelf in shelves:
        shelf_barcode = shelf.barcode or ""
        if not shelf_barcode:
            continue
        locations = sf_shelf_location_model.search([("shelf_id", "=", shelf.id)], order="id asc")
        for index, location in enumerate(locations, start=1):
            new_barcode = f"{shelf_barcode}-{index:03d}"
            location.barcode = new_barcode