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

import datetime
import dingguo
import email
import ioex
import re

def parse_order_confirmation_mail(mail):

    assert isinstance(mail, email.message.Message)

    msg_text = mail.get_payload()[0].get_payload(decode = True).decode('utf-8')

    if not u'Amazon.de Bestellbestätigung' in msg_text:
        raise Exception('no amazon order confirmation')

    orders = []

    for order_text in re.split(ur'={32,}', msg_text)[1:-1]:

        order_id = re.search(r'Bestellnummer #(.+)', order_text).group(1)

        order_date_formatted = re.search(ur'Aufgegeben am (.+)', order_text, re.UNICODE).group(1)
        with ioex.setlocale('de_DE.UTF-8'):
            order_date = datetime.datetime.strptime(
                    order_date_formatted.encode('utf-8'),
                    '%d. %B %Y',
                    )

        order = dingguo.Order(
            u'amazon.de',
            order_id,
            order_date
            )

        articles_text = order_text.split('Bestellte(r) Artikel:')[1].split('_' * 10)[0].strip()
        for article_text in re.split(ur'\n\t*\n', articles_text):
            article_match = re.match(
                ur' *((?P<quantity>\d+) x )?(?P<name>.*)\n'
                    + ur'( *von (?P<authors>.*)\n)?'
                    + ur' *(?P<price_brutto_currency>[A-Z]+) (?P<price_brutto>\d+,\d+)\n'
                    + ur'( *Zustand: (?P<state>.*)\n)?'
                    + ur' *Verkauft von: (?P<reseller>.*)'
                    + ur'(\n *Versand durch (?P<shipper>.*))?',
                article_text,
                re.MULTILINE | re.UNICODE
                )
            assert article_match is not None, repr(article_text)
            article = article_match.groupdict()
            order.items.append(dingguo.Article(
                name = article['name'],
                price_brutto = dingguo.Sum(
                    float(article['price_brutto'].replace(',', '.')),
                    article['price_brutto_currency']
                    ),
                quantity = int(article['quantity']) if article['quantity'] else 1,
                authors = article['authors'].split(',') if article['authors'] else None,
                state = article['state'],
                reseller = article['reseller'],
                shipper = article['shipper'],
                ))

        orders.append(order)

    return orders