# -* coding: utf8 *-

from Invoice import Text, Table
from utils import format_price, split_to_width



def _breakLine(text, width=72):
  lines = []
  paras = text.split('\n')
  for para in paras:
    words = para.split(' ')
    while len(words) > 0:
      mywords = [words[0], ]
      del words[0]
      while len(words) > 0 and len(u' '.join(mywords) + ' ' + words[0]) <= width:
        mywords.append(words[0])
        del words[0]
      lines.append(' '.join(mywords))
  return lines
  

def InvoiceToText(iv, bankdata=True):
  ret = []
  ret.append(u'Rechnungsempfänger:')
  for line in iv.addresslines:
    ret.append('  %s' % line)
  ret.append('')
  ret.append('Kundennummer:    %4i' % iv.customerno)
  ret.append('Rechnungsnummer: %4i    Rechnungsdatum:  %s' % (iv.id, iv.date.strftime('%d.%m.%Y')))

  ret.append('')
  for part in iv.parts:
    if type(part) == Table:
      ret.append(InvoiceTableToText(part))
    elif type(part) == Text:
      ret.append(InvoiceTextToText(part))
    else:
      raise NotImplementedError("Cannot handle part of type %s" % type(part))


  if bankdata:
      ret.append('-'*72)
      ret.append('Unsere Bankverbindung:')
      ret.append('Volksbank Backnang, BLZ 602 911 20, Konto-Nr. 41512 006')
      ret.append('IBAN: DE91602911200041512006, BIC: GENODES1VBK')

  return ('\n'.join(ret)).encode('utf-8')



def InvoiceTableToText(invoiceTable):
  ret = []
  if len(invoiceTable.vat) < 2:
    ret.append(u'Anz       Beschreibung                                  Preis     Gesamt')
    ret.append(u'-'*72)
  else:
    ret.append(u'Anz       Beschreibung                                Preis       Gesamt')
    ret.append(u'-'*72)

  for el in invoiceTable.entries:
    unit = ''
    if el['unit']:
      unit = ' %s' % el['unit']
    if len(invoiceTable.vat) < 2:
      subject = _breakLine(el['subject'], width=39)
      ret.append(u'%5.2f %-3s %-39s  %10s %10s' % (el['count'], unit, subject[0], format_price(el['price']), format_price(el['total'])))
      for i in range(1,len(subject)):
        ret.append(u'          %s' % subject[i])
    else:
      subject = _breakLine(el['subject'], width=41)
      ret.append(u'%5.2f %-3s %-37s  %10s %s %10s' % (el['count'], unit, subject[0], format_price(el['price']), invoiceTable.vat[el['vat']][1], format_price(el['total'])))
      for i in range(1,len(subject)):
        ret.append(u'          %s' % subject[i])
    if 'desc' in el and el['desc']:
      desc = _breakLine(el['desc'], 39)
      for line in desc:
        ret.append(u'          %s' % line)
  ret.append('-'*72)
  if invoiceTable.vatType == 'gross':
    ret.append((u'Rechnungsbetrag:  %11s' % format_price(invoiceTable.sum)).rjust(72))
    ret.append('')
    summaries = []
    if len(invoiceTable.vat) == 1:
      vat = invoiceTable.vat.keys()[0]
      summaries.append(u'      Im Rechnungsbetrag sind %.1f%% MwSt enthalten (%s)' % (vat*100, format_price((invoiceTable.sum/(vat+1))*vat)))
    else:
      for vat, vatdata in invoiceTable.vat.iteritems():
        summaries.append(u'    %s: Im Teilbetrag von %s sind %.1f%% MwSt enthalten (%s)' % (vatdata[1], format_price(vatdata[0]), vat*100, format_price((vatdata[0]/(vat+1))*vat)))
    summaries.sort()
    for line in summaries:
      ret.append(line)
  else:
    ret.append((u'Nettobetrag: %11s' % format_price(invoiceTable.sum)).rjust(72))
    summaries = []
    if len(invoiceTable.vat) == 1:
      vat = invoiceTable.vat.keys()[0]
      summaries.append((u'zzgl. %.1f%% MwSt: %11s' % (vat*100, format_price(vat*invoiceTable.sum))).rjust(72))
    elif len(invoiceTable.vat) > 1:
      for vat, vatdata in invoiceTable.vat.iteritems():
        summaries.append((u'zzgl. %4.1f%% MwSt (%s): %11s' % (vat*100, vatdata[1], format_price(vat*vatdata[0]))).rjust(72))
    summaries.sort()
    for line in summaries:
      ret.append(line)
    sum = invoiceTable.sum
    for vat, vatdata in invoiceTable.vat.iteritems():
      sum += vat*vatdata[0]
    ret.append((u'Rechnungsbetrag: %11s' % format_price(sum)).rjust(72))
  ret.append('')
  return ('\n'.join(ret)).encode('utf-8')


def InvoiceTextToText(invoiceText):
  ret = []
  for par in invoiceText.paragraphs:
    for str in split_to_width(par, 72):
      ret.append(str)
    ret.append('')
  return ('\n'.join(ret)).encode('utf-8')