# -* coding: utf8 *-
# (C) 2011 by Bernd Wurst <bernd@schokokeks.org>

# This file is part of Bib2011.
#
# Bib2011 is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Bib2011 is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Bib2011.  If not, see <http://www.gnu.org/licenses/>.

import datetime


class InvoiceImage(object):
    def __init__(self, pilimage, caption=None, dpi=80, alignment="left"):
        self.imagedata = pilimage
        self.alignment = alignment
        self.dpi = dpi
        self.caption = caption


class InvoiceText(object):
    def __init__(self, content, urgent=False, headline=None):
        self.paragraphs = [content]
        self.urgent = urgent
        self.headline = headline
        self.fontsize = 0  # relative Schriftgröße ggü default

    def addParagraph(self, content):
        self.paragraphs.append(content)


class InvoiceTable(object):
    def __init__(self, vatType='gross', tender=False, summary=True):
        self.entries = []
        self.vat = {}
        self.sum = 0.0
        self.payments = []
        self.tender = tender
        self.summary = summary
        if vatType not in ['gross', 'net']:
            raise ValueError('vatType must be »gross« or »net«')
        self.vatType = vatType
    
    def validEntry(self, entry):
        """bekommt einen Eintrag und liefert einen Eintrag, wenn ok; wirft ansonsten ValueError.
        wird benutzt um z.B. die Summe auszurechnen oder ähnliches
        """
        k = entry.keys()
        e = entry
        if not ('count' in k and 'unit' in k and 'subject' in k and 'price' in k and 'vat' in k):
            raise ValueError('Some data is missing!')
        ret = {'type': 'entry',
               'count': e['count'],
               'unit': e['unit'],
               'subject': e['subject'],
               'price': e['price'],
               'total': (e['price'] * e['count']),
               'vat': e['vat'],
               'tender': False,
               }
        if ret['vat'] > 1:
            ret['vat'] = float(ret['vat']) / 100
            
        if 'tender' in e.keys():
            ret['tender'] = e['tender']
        if 'desc' in k:
            ret['desc'] = e['desc']
        if 'period_start' in k:
            ret['period_start'] = e['period_start']
        if 'period_end' in k:
            ret['period_end'] = e['period_end']

        return ret
    
    def addItem(self, data):
        """Fügt eine Zeile ein. data muss ein Dict mit passenden Keys und passenden
        Typen sein"""
        d = self.validEntry(data)
        if not d['vat'] in self.vat.keys():
            self.vat[d['vat']] = [0, chr(65+len(self.vat))]
        if 'tender' not in data or not data['tender']:
            self.vat[d['vat']][0] += d['total']
            self.sum += d['total']
        self.entries.append(d)
    
    def addTitle(self, title):
        self.entries.append({'type': 'title', 'title': title, })

    def addPayment(self, payment_type, amount, date):
        self.payments.append({"type": payment_type, "amount": amount, "date": date})


RECHNUNG = 380
ANGEBOT = 1
GUTSCHRIFT = 381
KORREKTUR = 384

VAT_REGULAR = 'S'
VAT_KLEINUNTERNEHMER = 'E'
VAT_INNERGEM = 'K'

PAYMENT_LASTSCHRIFT = "59"
PAYMENT_UEBERWEISUNG = "58"
PAYMENT_BANKKONTO = "42"
PAYMENT_ONLINE = "68"
PAYMENT_BAR = "10"
PAYMENT_KARTE = "48"


class Invoice(object):
    def __init__(self, tender=False):
        self.customerno = None
        self.customer = {
            "id": None,
            "name": None,
            "address": {
                "postcode": None,
                "city_name": None,
                "line1": None,
                "line2": None,
                "line3": None,
                "country_id": None,
            },
            "phone": None,
            "email": None,
        }
        self.buyer = self.customer
        self.seller = {
            "name": None,  # juristischer Name
            "trade_name": None,  # Firmenname
            "address": {
                "postcode": None,
                "city_name": None,
                "line1": None,
                "line2": None,
                "line3": None,
                "country_id": None,
            },
            "phone": None,
            "email": None,
            "website": None,
        }
        self.seller_vat_id = None
        self.seller_bank_data = {
            'kontoinhaber': None,
            'iban': None,
            'bic': None,
            'bankname': None,
        }
        self.due_date = None
        self.debit = False
        self.payment_type = PAYMENT_UEBERWEISUNG
        self.leitweg_id = None
        self.buyer_reference = None
        self.order_number = None
        self.contract_number = None
        self.debit_mandate_id = None
        self.creditor_reference_id = None
        self.buyer_bank_data = {
            'kontoinhaber': None,
            'iban': None,
            'bic': None,
            'bankname': None,
        }
        self.vat_type = VAT_REGULAR
        self.salutation = 'Sehr geehte Damen und Herren,'
        self.id = None
        self.cash = True
        self.type = RECHNUNG
        self.logo_image_file = None
        self.tender = tender
        self.title = 'Rechnung'
        if tender:
            self.title = 'Angebot'
        self.official = True
        self.parts = []
        self.pagecount = 0
        self.date = datetime.date.today()
    
    def setDate(self, date):
        if not isinstance(date, datetime.date):
            raise ValueError('date must be of type »datetime.date«')
        self.date = date