# -* coding: utf8 *-

from __future__ import division
from Invoice import Text, Table, Image
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))
        elif type(part) == Image:
            # ignore images
            pass
        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)


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 = list(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 list(invoiceTable.vat.items()):
                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 = list(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 list(invoiceTable.vat.items()):
                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 list(invoiceTable.vat.items()):
            sum += vat * vatdata[0]
        ret.append((u'Rechnungsbetrag: %11s' % format_price(sum)).rjust(72))
    ret.append('')
    return '\n'.join(ret)


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