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

import datetime
import dingguo
import email
import ioex
import re
import subprocess

def parse_order_confirmation_mail(mail):

    assert isinstance(mail, email.message.Message)

    if not 'mytaxi' in mail.get_payload()[0].get_payload()[0].get_payload(decode = True):
        raise Exception('no mytaxi mail')

    pdf_compressed = mail.get_payload()[1].get_payload(decode = True)
    pdftk = subprocess.Popen(
            ['pdftk - output - uncompress'],
            shell = True,
            stdin = subprocess.PIPE,
            stdout = subprocess.PIPE,
            )
    pdf_uncompressed = pdftk.communicate(
        input = pdf_compressed,
        )[0].decode('latin-1')
    assert type(pdf_uncompressed) is unicode

    order_match = re.search(
        ur'Rechnungsnummer:[^\(]+\((?P<order_id>\w+)\)',
        pdf_uncompressed,
        re.MULTILINE | re.UNICODE
        )
    order_id = order_match.groupdict()['order_id']

    ride_match_groups = re.search(
        ur'\(Bruttobetrag\)'
            + ur'[^\(]+'
            + ur'\((?P<price_brutto>\d+,\d+) (?P<price_brutto_currency>.+)\)'
            + ur'[\w\W]+'
            + ur'\((?P<driver>[^\(]+)\)'
            + ur'[^\(]+'
            + ur'\(\d+,\d+ .\)'
            + ur'[^\(]+'
            + ur'\((?P<name>Taxifahrt)'
            + ur'[^\(]+'
            + ur'\(von: (?P<departure_point>[^\)]+)'
            + ur'[^\(]+'
            + ur'\(nach: (?P<destination_point>[^\)]+)'
            + ur'[\w\W]+'
            + ur'Belegdatum \\\(Leistungszeitpunkt\\\):[^\(]+\((?P<arrival_time>\d\d.\d\d.\d\d \d\d:\d\d)\)',
        pdf_uncompressed,
        re.MULTILINE | re.UNICODE
        ).groupdict()

    arrival_time = datetime.datetime.strptime(
        ride_match_groups['arrival_time'],
        '%d.%m.%y %H:%M'
        )

    order = dingguo.Order(
        u'mytaxi',
        order_id,
        order_date = arrival_time.date(),
        )
    with ioex.setlocale('en_US.UTF-8'):
        order.items.append(dingguo.TaxiRide(
            price_brutto = dingguo.Sum(
                float(ride_match_groups['price_brutto'].replace(',', '.')),
                # why 0x80 ?
                u'EUR' if (ride_match_groups['price_brutto_currency'] == u'\x80')
                    else ride_match_groups['price_brutto_currency'],
                ),
            departure_point = ride_match_groups['departure_point'],
            destination_point = ride_match_groups['destination_point'],
            driver = ride_match_groups['driver'],
            arrival_time = arrival_time,
            ))
    return [order]