custom_ivess/__init__.py

 # -*- coding: utf-8 -*-
 
-from . import models
\ No newline at end of file
+from . import models
+from . import wizard

custom_ivess/__manifest__.py

@@ -12,6 +12,7 @@
         'product',
         'account',
         'stock',
+        'l10n_ar_eynes',
     ],
 
     'data': [

custom_ivess/models/account_move.py

@@ -37,6 +37,16 @@ class AccountMove(models.Model):
             if sequence:
                 partner.customer_code = sequence.next_by_id()
 
+    def _get_mail_template(self):
+        """
+        :return: the correct mail template based on the current move type
+        """
+        return (
+            'account.email_template_edi_credit_note'
+            if all(move.move_type == 'out_refund' for move in self)
+            else 'account.email_template_edi_invoice'
+        )
+
 
 # class AccountMoveLine(models.Model):
 #     _inherit = 'account.move.line'

custom_ivess/wizard/__init__.py

+# -*- coding: utf-8 -*-
+
+from . import account_move_send

custom_ivess/wizard/account_move_send.py

+# -*- coding: utf-8 -*-
+
+from odoo import api, fields, models, _
+
+
+class AccountMoveSend(models.TransientModel):
+    _inherit = 'account.move.send'
+
+    def _get_default_mail_attachments_widget(self, move, mail_template):
+        return self._get_placeholder_mail_template_dynamic_attachments_data(move, mail_template)
+
+    def _download(self, attachment_ids, moves_data=None):
+        # Descarga adjunto de factura afip
+        if self.mode == 'invoice_single' and len(attachment_ids) == 1 and moves_data:
+            move = list(moves_data.keys())[0]
+            attachments = move.attachment_ids.filtered(lambda r: 'afip' in r.name.lower())
+            attachments = attachments.sorted(lambda r: r.create_date, reverse=True)
+            if attachments:
+                attachment_ids = attachments[0].ids
+        return super()._download(attachment_ids, moves_data)