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


class PurchaseOrder(models.Model):
    _inherit = 'purchase.order'

    from_pop = fields.Boolean(string='Created from POP', default=False)

    def action_purchase_confirm(self, cr, uid, ids, context=None):
        if not context:
            context = {}

        assert len(ids) == 1, 'This option should only be used for a single id at a time'
        
        self.signal_workflow(cr, uid, ids, 'purchase_confirm')

        return True

    @api.multi
    def purchase_process_now(self):
        """
        Confirms order and creates and validates invoice, confirms pickings.
        """
        for purchase in self:
            # Process order
            purchase.action_purchase_confirm()
            for picking in purchase.picking_ids:
                picking.force_assign()
                picking.action_done()

    @api.model
    def action_invoice_create(self):
        if self.from_pop:
            return 0

        return super(PurchaseOrder, self).action_invoice_create(self.ids)