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

import genshi.template
import os
from decimal import Decimal
from trytond.modules.edocument_uncefact.edocument import Invoice
from .mixin import EdocumentMixin


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

    def sales_order_nums(self):
        """ get string of sale-numbers
        """
        if getattr(self.invoice, 'sales', None) is not None:
            return ', '.join([x.number for x in self.invoice.sales])

    def negate_amount(self, amount):
        """ amount * -1.0
        """
        if amount is not None and amount:
            if isinstance(amount, Decimal):
                return amount.copy_negate()
            elif isinstance(amount, float):
                return -1.0 * amount
            elif isinstance(amount, int):
                return -1 * amount
        else:
            return amount

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

    def invoice_note(self):
        """ get 'description' + 'comment'
        """
        notes = []
        if self.invoice.description:
            notes.append(self.invoice.description)

        if self.invoice.comment:
            notes.extend(self.invoice.comment.split('\n'))
        if notes:
            return '; '.join(notes)

    def _get_template(self, version):
        """ load our own template if 'version' is ours
        """
        loader = genshi.template.TemplateLoader(
            os.path.join(os.path.dirname(__file__), 'template'),
            auto_reload=True)

        if version in ['XRechnung-2.2', 'XRechnung-2.3', 'XRechnung-3.0']:
            file_name = {
                '380': 'XRechnung_invoice.xml',
                '389': 'XRechnung_invoice.xml',
                '381': 'XRechnung_credit.xml',
                '261': 'XRechnung_credit.xml',
                }.get(self.type_code)

            if file_name:
                return loader.load(os.path.join(version, file_name))
            else:
                raise ValueError('invalid type-code "%s"' % self.type_code)
        else:
            return super()._get_template(version)

# end XRechnung


class FacturX(EdocumentMixin, Invoice):
    'Factur-X'
    __name__ = 'edocument.facturxext.invoice'

    def _get_template(self, version):
        """ load our own template if 'version' is ours
        """
        loader = genshi.template.TemplateLoader(
            os.path.join(os.path.dirname(__file__), 'template'),
            auto_reload=True)

        if version == 'Factur-X-1.07.2-extended':
            if self.type_code in ['380', '389', '381', '261']:
                return loader.load(os.path.join(version, 'invoice.xml'))
            else:
                raise ValueError('invalid type-code "%s"' % self.type_code)
        else:
            return super()._get_template(version)

# end FacturX