# -*- coding: utf-8 -*-
# This file is part of the edcoment-module for Tryton.
# The COPYRIGHT file at the top level of this repository contains the
# full copyright notices and license terms.

import genshi.template
import os, html
from trytond.exceptions import UserError
from trytond.i18n import gettext
from trytond.modules.edocument_uncefact.edocument import Invoice
from decimal import Decimal


class Invoice(Invoice):
    'EDocument XRechnung'
    __name__ = 'edocument.xrechnung.invoice'

    def prepaid_amount(self, invoice):
        """ compute already paid amount
        """
        return invoice.total_amount - invoice.amount_to_pay

    def tax_rate(self, tax):
        """ get tax-rate in procent
        """
        return (tax.tax.rate * Decimal('100.0')).quantize(Decimal('0.01'))

    def tax_category_code(self, tax):
        """ read tax-category, fire exception if missing
        """
        if len(tax.tax.unece_category_code or '') == 0:
            raise UserError(gettext(
                'edocument_xrechnung.mds_tax_category_missing',
                taxname = tax.rec_name,
                ))
        return tax.tax.unece_category_code

    def quote_text(self, text):
        """ replace critical chars
        """
        if text is not None:
            return html.quote(text)

    def _get_template(self, version):
        """ load our own template if 'version' is ours
        """
        if version == 'XRechnung-2.2':
            loader = genshi.template.TemplateLoader(
                os.path.join(os.path.dirname(__file__), 'template'),
                auto_reload=True)
            return loader.load(os.path.join(version, 'XRechnung.xml'))
        else :
            return super(Invoice, self)._get_template(version)

# end Invoice