# -*- coding: utf-8 -*-

import datetime
import dingguo
import email
import re

def parse_order_confirmation_mail(mail):

    assert isinstance(mail, email.message.Message)

    mail_text = mail.get_payload()[0].get_payload(decode = True).decode('iso-8859-1')

    if not u'Danke für deine Bestellung bei IKEA' in mail_text:
        raise Exception('no ikea order confirmation')

    order = dingguo.Order(
        order_id = re.search(ur'Bestellnummer:\s+(\d+)', mail_text).group(1),
        order_date = datetime.datetime.strptime(
                re.search(ur'Bestelldatum:\s+(\d\d-\d\d-\d{4})', mail_text).group(1),
                '%d-%m-%Y',
                ).date(),
        platform = u'ikea',
        )

    # Menge  1
    # Produkt KOMPLEMENT
    #  Bügel, ausziehbar , dunkelgrau
    #  Tiefe: 58 cm
    #  Max Belastung: 4 kg
    # Artikelnummer: 202.624.87
    # Einzelpreis ? 10,-
    # Gesamtpreis ? 10,-

    # Menge  1
    # Produkt ÄPPLARÖ
    #  Hocker/außen , braun faltbar braun las.
    #  Breite: 40 cm
    #  Tiefe: 38 cm
    #  Höhe: 42 cm
    # Artikelnummer: 202.049.25
    # Einzelpreis ? 19,99
    # Gesamtpreis ? 19,99

    for article_text in re.findall(ur'Menge[\W\w]+?Gesamtpreis', mail_text):
        article_attr = re.match(
                ur'Menge\s+(?P<quantity>\d+)\s+'
                    + ur'Produkt\s+(?P<name>.+)\s+'
                    + ur'(?P<label>.+)\s+'
                    + ur'(Breite: (?P<width>\d+) (?P<width_unit>[^\s]+)\s+)?'
                    + ur'(Tiefe: (?P<depth>\d+) (?P<depth_unit>[^\s]+)\s+)?'
                    + ur'(Höhe: (?P<height>\d+) (?P<height_unit>[^\s]+)\s+)?'
                    + ur'(Max Belastung: (?P<maximum_load>\d+) (?P<maximum_load_unit>[^\s]+)\s+)?'
                    + ur'Artikelnummer: (?P<product_id>[\d\.]+)\s+'
                    + ur'Einzelpreis \? (?P<price>\d+,\d*)-?\s+'
                    + ur'Gesamtpreis',
                article_text,
                re.UNICODE,
                ).groupdict()
        order.items.append(dingguo.Article(
            depth = dingguo.ScalarFigure(float(article_attr['depth']), article_attr['depth_unit']) if article_attr['depth'] else None,
            height = dingguo.ScalarFigure(float(article_attr['height']), article_attr['height_unit']) if article_attr['height'] else None,
            maximum_load = dingguo.ScalarFigure(float(article_attr['maximum_load']), article_attr['maximum_load_unit']) if article_attr['maximum_load'] else None,
            name = u'%s %s' % (article_attr['name'].strip(), article_attr['label'].strip().replace(' , ', ', ')),
            price_brutto = dingguo.Sum(float(article_attr['price'].replace(',', '.')), u'EUR'),
            product_id = article_attr['product_id'],
            quantity = int(article_attr['quantity']),
            width = dingguo.ScalarFigure(float(article_attr['width']), article_attr['width_unit']) if article_attr['width'] else None,
            ))

    return [order]