[FIX] l10n_pt_account_invoicexpress: send total amount as euro in inv…

…oice

[FIX] convert unit price in invoice lines to company currency.

[REF] convert currency to follow PEP8 guidelines when using multiple lines

Update l10n_pt_account_invoicexpress/models/account_move.py

Co-authored-by: Daniel Reis <dreis@opensourceintegrators.com>

[IMP] currency conversion date when converting other currencies to company currency

l10n_pt_account_invoicexpress/models/account_move.py

@@ -119,12 +119,25 @@ def _prepare_invoicexpress_lines(self):
             tax = line.tax_ids[:1]
             # If not tax set, force zero VAT
             tax_detail = {"name": tax.name or "IVA0", "value": tax.amount or 0.0}
+            # Because InvoiceXpress expects unit_price in EUR, check if we need to convert
+            # line currency to company currency (company should use EUR as default currency)
+            if line.currency_id == line.company_id.currency_id:
+                price_unit = line.price_unit
+            else:
+                price_unit = line.currency_id._convert(
+                    line.price_unit,
+                    line.company_id.currency_id,
+                    line.company_id,
+                    line.move_id.invoice_date
+                    or line.move_id.date
+                    or fields.Date.context_today(line),
+                )
             items.append(
                 {
                     "name": line.product_id.default_code
                     or line.product_id.display_name,
                     "description": line._get_invoicexpress_descr(),
-                    "unit_price": line.price_unit,
+                    "unit_price": price_unit,
                     "quantity": line.quantity,
                     "discount": line.discount,
                     "tax": tax_detail,