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

import BeautifulSoup
import datetime
import dateutil.parser
import dingguo
import email
import ioex
import re

def parse_order_confirmation_mail(mail):

    assert isinstance(mail, email.message.Message)

    text = mail.get_payload()[0].get_payload()[0].get_payload(decode = True).decode('utf-8')
    if not u'Vielen Dank für deine Bestellung bei yipbee' in text:
        raise Exception('no yipbee confirmation')

    order_match_groups = re.search(
        ur'[\W\w]+'
            + ur'BESTELLUNG: (?P<order_id>\w+) vom (?P<order_time>\d\d.\d\d.\d{4} \d\d:\d\d:\d\d)'
            + ur'[\W\w]+'
            + ur'GESAMTPREIS\s+'
            + ur'(?P<articles_and_discount_text>[\W\w]+)'
            + ur'(?P<summary_text>ARTIKEL [\W\w]+)',
        text,
        re.UNICODE
        ).groupdict()

    order = dingguo.Order(
        u'yipbee',
        order_match_groups['order_id'],
        datetime.datetime.strptime(order_match_groups['order_time'], '%d.%m.%Y %H:%M:%S')
            .replace(tzinfo = dateutil.parser.parse(mail['Date']).tzinfo),
        )

    for article_match in re.finditer(
            ur'(?P<name>[\w\-\.\:,%\(\) ]+ (Klasse \d|[\w\-\. ]+[^\d ]))'
                + ur'(?P<total_price>\d+,\d\d) €(?P<quantity>\d)(?P<total_price_2>\d+,\d\d) €',
            order_match_groups['articles_and_discount_text'].replace('\n', ' '),
            re.UNICODE,
            ):
        article_match_groups = article_match.groupdict()
        total_price = float(article_match_groups['total_price'].replace(',', '.'))
        total_price_2 = float(article_match_groups['total_price_2'].replace(',', '.'))
        assert abs(total_price - total_price_2) < 0.01, 'expected %f, received %f' % (total_price, total_price_2)
        quantity = int(article_match_groups['quantity'])
        order.items.append(dingguo.Article(
            name = article_match_groups['name'],
            price_brutto = dingguo.Sum(round(total_price / quantity, 2), u'EUR'),
            quantity = quantity,
            reseller = u'yipbee',
            shipper = u'yipbee',
            ))

    articles_price = float(text.split('RABATTE')[0].split('ARTIKEL')[-1].strip().split(' ')[0].replace(',', '.'))
    assert abs(articles_price - sum([a.price_brutto.value * a.quantity for a in order.items])) < 0.01

    discount_tag = BeautifulSoup.BeautifulSoup(
        order_match_groups['articles_and_discount_text'],
        convertEntities = BeautifulSoup.BeautifulSoup.HTML_ENTITIES,
        ).find('tr')
    if discount_tag:
        name_tag, value_tag = discount_tag.findAll('td', recursive = False)
        value, currency = value_tag.text.split(' ')
        order.discounts.append(dingguo.Discount(
            name = name_tag.text,
            amount = dingguo.Sum(float(value.replace(',', '.')) * -1, currency),
            ))

    delivery_price = order_match_groups['summary_text'].split('VERSAND')[1].split('STEUERN')[0].strip()
    delivery_price_value, delivery_price_currency = delivery_price.split(' ')
    order.items.append(dingguo.Item(
        name = u'Delivery',
        price_brutto = dingguo.Sum(float(delivery_price_value.replace(',', '.')), delivery_price_currency),
        ))

    return [order]