from odoo import models, api, fields
import datetime
from datetime import date


class AccountMove(models.Model):
    _inherit = "account.move"
    txn_id = fields.Char("Transaction ID")
    signed_by = fields.Char("signed by", compute='compute_signature')
    print_date = fields.Date("Print date", compute='compute_print_date')

    def compute_print_date(self):
        for rec in self:
            if rec.invoice_origin:
                sale_id = self.env['sale.order'].sudo().search([('name', '=', rec.invoice_origin)])
                for doc in sale_id:
                    rec.print_date = doc.signed_on
            else:
                rec.print_date = date.today()


    def compute_signature(self):
        for rec in self:
            if rec.invoice_origin:
                sale_id = self.env['sale.order'].sudo().search([('name', '=', rec.invoice_origin)])
                for doc in sale_id:
                    rec.signed_by = doc.signed_by