# -* coding: utf8 *-

import datetime

class Text(object):
  def __init__(self, content, urgent=False, headline=None):
    self.paragraphs = [content]
    self.urgent = urgent
    self.headline = headline

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


class Table(object):
  def __init__(self, vatType = 'gross', tender = False, summary = True):
    self.entries = []
    self.vat = {}
    self.sum = 0.0
    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 'subject' in k and 'price' in k and 'vat' in k):
      raise ValueError('Some data is missing!')
    ret = {'count': e['count'],
          'subject': e['subject'],
          'price': e['price'],
          'total': (e['price'] * e['count']),
          'vat': e['vat'],
          'tender': False,
          }
    if 'tender' in e.keys():
      ret['tender'] = e['tender']
    if 'desc' in k:
      ret['desc'] = e['desc']
    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 d['vat'] != 0:
      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']
    if 'tender' not in data or not data['tender']:
      self.sum += d['total']
    self.entries.append(d)



class Invoice(object):
  tender = False
  caption = 'Rechnung'

  def __init__(self):
    self.customerno = None
    self.addresslines = ['', ]
    self.salutation = 'Sehr geehrte Damen und Herren,'
    self.id = None
    self.parts = []
    self.pagecount = 0
    self.date = datetime.date.today()

  def setDate(self, date):
    if type(date) != datetime.date:
      raise ValueError('date must be of type »datetime.date«')
    self.date = date


class Tender(Invoice):
  tender = True
  caption = 'Angebot'


class Generic(Invoice):
  tender = False
  caption = ''