# -*- coding: iso-8859-1 -*-

"PDF Template Helper for FPDF.py"

__author__ = "Mariano Reingart <reingart@gmail.com>"
__copyright__ = "Copyright (C) 2010 Mariano Reingart"
__license__ = "LGPL 3.0"

import sys,os,csv
from fpdf import FPDF

def rgb(col):
    return (col // 65536), (col // 256 % 256), (col% 256)

class Template:
    def __init__(self, infile=None, elements=None, format='A4', orientation='portrait',
                 title='', author='', subject='', creator='', keywords=''):
        if elements:
            self.elements = dict([(v['name'].lower(),v) for v in elements])
        self.handlers = {'T': self.text, 'L': self.line, 'I': self.image, 
                         'B': self.rect, 'BC': self.barcode, }
        self.pg_no = 0
        self.texts = {}
        pdf = self.pdf = FPDF(format=format,orientation=orientation, unit="mm")
        pdf.set_title(title)
        pdf.set_author(author)
        pdf.set_creator(creator)
        pdf.set_subject(subject)
        pdf.set_keywords(keywords)

    def parse_csv(self, infile, delimiter=",", decimal_sep="."):
        "Parse template format csv file and create elements dict"
        keys = ('name','type','x1','y1','x2','y2','font','size',
            'bold','italic','underline','foreground','background',
            'align','text','priority')
        self.elements = {}
        for row in csv.reader(open(infile, 'rb'), delimiter=delimiter):
            kargs = {}
            for i,v in enumerate(row):
                if not v.startswith("'") and decimal_sep!=".": 
                    v = v.replace(decimal_sep,".")
                else:
                    v = v
                if v=='':
                    v = None
                else:
                    v = eval(v.strip())
                kargs[keys[i]] = v
            self.elements[kargs['name'].lower()] = kargs


    def add_page(self):
        self.pg_no += 1
        self.texts[self.pg_no] = {}
        
    def __setitem__(self, name, value):
        if name.lower() in self.elements:
            if isinstance(value,unicode):
                value = value.encode("latin1","ignore")
            else:
                value = str(value)
            self.texts[self.pg_no][name.lower()] = value

    # setitem shortcut (may be further extended)
    set = __setitem__

    def __getitem__(self, name):
        if name.lower() in self.elements:
            return self.texts[self.pg_no].get(name.lower(), self.elements[name.lower()]['text'])

    def split_multicell(self, text, element_name):
        "Divide (\n) a string using a given element width"
        pdf = self.pdf
        element = self.elements[element_name.lower()]
        style = ""
        if element['bold']: style += "B"
        if element['italic']: style += "I"
        if element['underline']: style += "U"
        pdf.set_font(element['font'],style,element['size'])
        align = {'L':'L','R':'R','I':'L','D':'R','C':'C','':''}.get(element['align']) # D/I in spanish
        if isinstance(text, unicode):
            text = text.encode("latin1","ignore")
        else:
            text = str(text)
        return pdf.multi_cell(w=element['x2']-element['x1'],
                             h=element['y2']-element['y1'],
                             txt=text,align=align,split_only=True)
        
    def render(self, outfile, dest="F"):
        pdf = self.pdf
        for pg in range(1, self.pg_no+1):
            pdf.add_page()
            pdf.set_font('Arial','B',16)
            pdf.set_auto_page_break(False,margin=0)

            for element in sorted(self.elements.values(),key=lambda x: x['priority']):
                #print "dib",element['type'], element['name'], element['x1'], element['y1'], element['x2'], element['y2']
                element = element.copy()
                element['text'] = self.texts[pg].get(element['name'].lower(), element['text'])
                if 'rotate' in element:
                    pdf.rotate(element['rotate'], element['x1'], element['y1'])
                self.handlers[element['type'].upper()](pdf, **element)
                if 'rotate' in element:
                    pdf.rotate(0)
                    
        return pdf.output(outfile, dest)
        
    def text(self, pdf, x1=0, y1=0, x2=0, y2=0, text='', font="arial", size=10, 
             bold=False, italic=False, underline=False, align="", 
             foreground=0, backgroud=65535,
             *args, **kwargs):
        if text:
            if pdf.text_color!=rgb(foreground):
                pdf.set_text_color(*rgb(foreground))
            if pdf.fill_color!=rgb(backgroud):
                pdf.set_fill_color(*rgb(backgroud))

            font = font.strip().lower()
            if font == 'arial black':
                font = 'arial'
            style = ""
            for tag in 'B', 'I', 'U':
                if (text.startswith("<%s>" % tag) and text.endswith("</%s>" %tag)):
                    text = text[3:-4]
                    style += tag
            if bold: style += "B"
            if italic: style += "I"
            if underline: style += "U"
            align = {'L':'L','R':'R','I':'L','D':'R','C':'C','':''}.get(align) # D/I in spanish
            pdf.set_font(font,style,size)
            ##m_k = 72 / 2.54
            ##h = (size/m_k)
            pdf.set_xy(x1,y1)
            pdf.cell(w=x2-x1,h=y2-y1,txt=text,border=0,ln=0,align=align)
            #pdf.Text(x=x1,y=y1,txt=text)

    def line(self, pdf, x1=0, y1=0, x2=0, y2=0, size=0, foreground=0, *args, **kwargs):
        if pdf.draw_color!=rgb(foreground):
            #print "SetDrawColor", hex(foreground)
            pdf.set_draw_color(*rgb(foreground))
        #print "SetLineWidth", size
        pdf.set_line_width(size)
        pdf.line(x1, y1, x2, y2)

    def rect(self, pdf, x1=0, y1=0, x2=0, y2=0, size=0, foreground=0, backgroud=65535, *args, **kwargs):
        if pdf.draw_color!=rgb(foreground):
            pdf.set_draw_color(*rgb(foreground))
        if pdf.fill_color!=rgb(backgroud):
            pdf.set_fill_color(*rgb(backgroud))
        pdf.set_line_width(size)
        pdf.rect(x1, y1, x2-x1, y2-y1)

    def image(self, pdf, x1=0, y1=0, x2=0, y2=0, text='', *args,**kwargs):
        pdf.image(text,x1,y1,w=x2-x1,h=y2-y1,type='',link='')

    def barcode(self, pdf, x1=0, y1=0, x2=0, y2=0, text='', font="arial", size=1,
             foreground=0, *args, **kwargs):
        if pdf.draw_color!=rgb(foreground):
            pdf.set_draw_color(*rgb(foreground))
        font = font.lower().strip()
        if font == 'interleaved 2of5 nt':
            pdf.interleaved2of5(text,x1,y1,w=size,h=y2-y1)


if __name__ == "__main__":

    # generate sample invoice (according Argentina's regulations)

    import random
    from decimal import Decimal

    f = Template(format="A4",
             title="Sample Invoice", author="Sample Company",
             subject="Sample Customer", keywords="Electronic TAX Invoice")
    f.parse_csv(infile="invoice.csv", delimiter=";", decimal_sep=",")
    
    detail = "Lorem ipsum dolor sit amet, consectetur. " * 30
    items = []
    for i in range(1, 30):
        ds = "Sample product %s" % i
        qty = random.randint(1,10)
        price = round(random.random()*100,3)
        code = "%s%s%02d" % (chr(random.randint(65,90)), chr(random.randint(65,90)),i)
        items.append(dict(code=code, unit='u',
                          qty=qty, price=price, 
                          amount=qty*price,
                          ds="%s: %s" % (i,ds)))

    # divide and count lines
    lines = 0
    li_items = []
    for it in items:
        qty = it['qty']
        code = it['code']
        unit = it['unit']
        for ds in f.split_multicell(it['ds'], 'item_description01'):
            # add item description line (without price nor amount)
            li_items.append(dict(code=code, ds=ds, qty=qty, unit=unit, price=None, amount=None))
            # clean qty and code (show only at first)
            unit = qty = code = None
        # set last item line price and amount
        li_items[-1].update(amount = it['amount'],
                            price = it['price'])

    obs="\n<U>Detail:</U>\n\n" + detail
    for ds in f.split_multicell(obs, 'item_description01'):
        li_items.append(dict(code=code, ds=ds, qty=qty, unit=unit, price=None, amount=None))

    # calculate pages:
    lines = len(li_items)
    max_lines_per_page = 24
    pages = lines / (max_lines_per_page - 1)
    if lines % (max_lines_per_page - 1): pages = pages + 1

    # completo campos y hojas
    for page in range(1, pages+1):
        f.add_page()
        f['page'] = 'Page %s of %s' % (page, pages)
        if pages>1 and page<pages:
            s = 'Continues on page %s' % (page+1)
        else:
            s = ''
        f['item_description%02d' % (max_lines_per_page+1)] = s

        f["company_name"] = "Sample Company"
        f["company_logo"] = "tutorial/logo.png"
        f["company_header1"] = "Some Address - somewhere -"
        f["company_header2"] = "http://www.example.com"        
        f["company_footer1"] = "Tax Code ..."
        f["company_footer2"] = "Tax/VAT ID ..."
        f['number'] = '0001-00001234'
        f['issue_date'] = '2010-09-10'
        f['due_date'] = '2099-09-10'
        f['customer_name'] = "Sample Client"
        f['customer_address'] = "Siempreviva 1234"
       
        # print line item...
        li = 0 
        k = 0
        total = Decimal("0.00")
        for it in li_items:
            k = k + 1
            if k > page * (max_lines_per_page - 1):
                break
            if it['amount']:
                total += Decimal("%.6f" % it['amount'])
            if k > (page - 1) * (max_lines_per_page - 1):
                li += 1
                if it['qty'] is not None:
                    f['item_quantity%02d' % li] = it['qty']
                if it['code'] is not None:
                    f['item_code%02d' % li] = it['code']
                if it['unit'] is not None:
                    f['item_unit%02d' % li] = it['unit']
                f['item_description%02d' % li] = it['ds']
                if it['price'] is not None:
                    f['item_price%02d' % li] = "%0.3f" % it['price']
                if it['amount'] is not None:
                    f['item_amount%02d' % li] = "%0.2f" % it['amount']

        if pages == page:
            f['net'] = "%0.2f" % (total/Decimal("1.21"))
            f['vat'] = "%0.2f" % (total*(1-1/Decimal("1.21")))
            f['total_label'] = 'Total:'
        else:
            f['total_label'] = 'SubTotal:'
        f['total'] = "%0.2f" % total
            
    f.render("./invoice.pdf")
    if sys.platform.startswith("linux"):
        os.system("evince ./invoice.pdf")
    else:
        os.system("./invoice.pdf")