# -*- coding: utf-8 -*-
from odoo import models, fields, api

class StockScrap(models.Model):
    _inherit = 'stock.scrap'

    date_done = fields.Datetime(
        'Date',
        readonly=False,
        default=fields.Datetime.now,
        copy=False,
    )

    def do_scrap(self):
        # Capture the custom date_done for each scrap record in draft state
        backdates = {}
        for scrap in self:
            if scrap.state == 'draft' and scrap.date_done:
                backdates[scrap.id] = scrap.date_done
            else:
                backdates[scrap.id] = fields.Datetime.now()

        res = super().do_scrap()

        # Shifting date_done and generated moves
        for scrap in self:
            backdate = backdates.get(scrap.id)
            if backdate:
                # We need to write date_done to the custom date because super().do_scrap() sets it to Datetime.now()
                scrap.write({'date_done': backdate})
                if scrap.move_ids:
                    scrap.move_ids._post_process_validated_moves(backdate)
        return res