from PyPDF2 import PdfFileWriter, PdfFileReader
import io
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import A4
from reportlab.lib.units import mm
from reportlab.lib.styles import ParagraphStyle
from reportlab.platypus import Paragraph
from reportlab.pdfbase.pdfmetrics import registerFont
from reportlab.pdfbase.ttfonts import TTFont
registerFont(TTFont('Arial','ARIAL.ttf'))

my_Style=ParagraphStyle('My Para style',
fontName='Arial',
backColor='#F1F1F1',
fontSize=8,
borderColor='#FFFF00',
borderWidth=1,
borderPadding=(0,0,0),
#leading=5,
alignment=1
)

my_Style2=ParagraphStyle('My Para style2',
fontName='Arial',
backColor='#F1F1F1',
fontSize=8,
borderColor='#FFFF00',
borderWidth=1,
borderPadding=(0,0,0),
#leading=5,
alignment=0
)
packet = io.BytesIO()
def coord(x, y, height, unit=1):
    x, y = x * unit, height -  y * unit
    return x, y
c = canvas.Canvas(packet, pagesize=A4)
width, height = A4


p1=Paragraph('''PROJEKT BUDOWLANY ROZBUDOWY SIECI GAZOWEJ Ś/C WRAZ Z BUDOWĄ PRZYŁĄCZY GAZU DO PIĘCIU SZAFEK GAZOWYCH ZLOKALIZOWANYCH NA DZIAŁKACH NR 47, 454/2, 454/4, 42/2.
 ''',my_Style)
p1.wrapOn(c, (*coord(190, 25, height, mm))) #prostokat
p1.drawOn(c, (*coord(10, 175, height, mm))) #tekst

p2=Paragraph('''Hardego''',my_Style2)
p2.wrapOn(c, (*coord(93, 10, height, mm))) #prosotkat
p2.drawOn(c, (*coord(10, 135, height, mm))) #tekst

p3=Paragraph('''meijscowosc''',my_Style2)
p3.wrapOn(c, (*coord(93, 10, height, mm))) #prosotkat
p3.drawOn(c, (*coord(10, 146, height, mm))) #tekst

p4=Paragraph('''miejscowowsc2''',my_Style2)
p4.wrapOn(c, (*coord(93, 10, height, mm))) #koordynaty prostokatya, szerokosc x wysokosc
p4.drawOn(c, (*coord(108, 146, height, mm))) #koordynaty x i y od miejsca startu tesktu

p5=Paragraph('''123/4, 123/4, 123/4, 123/4, 123/4, 123/4, 123/4, 123/4,''',my_Style2)
p5.wrapOn(c, (*coord(44, 30, height, mm))) #koordynaty prostokatya, szerokosc x wysokosc
p5.drawOn(c, (*coord(158, 138, height, mm))) #koordynaty x i y od miejsca startu tesktu (y im wieksze tym nizej strony) x im mniejsze tym blizej lewej krawedzi

p6=Paragraph('''bla bla''',my_Style2)
p6.wrapOn(c, (*coord(93, 10, height, mm))) #prosotkat
p6.drawOn(c, (*coord(10, 241, height, mm))) #tekst

c.showPage()
c.save()

#move to the beginning of the StringIO buffer
packet.seek(0)

# create a new PDF with Reportlab
new_pdf = PdfFileReader(packet)
# read your existing PDF
existing_pdf = PdfFileReader(open("original.pdf", "rb"))
output = PdfFileWriter()
# add the "watermark" (which is the new pdf) on the existing page
page = existing_pdf.getPage(0)
page.mergePage(new_pdf.getPage(0))
output.addPage(page)
# finally, write "output" to a real file
outputStream = open("destination31.pdf", "wb")
output.write(outputStream)
outputStream.close()