import argparse
import copy
import importlib.metadata as meta
import os
import platform
import subprocess
import tempfile

import pikepdf
from pikepdf import Rectangle

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Convert DHL Labels into 4 x 6 in Labels')
    parser.add_argument('input', help='Input file')
    parser.add_argument('--version', action='version', version=f'DHLCropper {meta.version("dhlcropper")}')
    args = parser.parse_args()
    with pikepdf.Pdf.open(args.input) as my_pdf:
        new_pdf = pikepdf.new();
        page = my_pdf.pages[0]
        page.rotate(90, True)
        paper_x, paper_y = (288, 432)
        new_pdf.add_blank_page(page_size=(paper_x, paper_y))
        upper = copy.copy(page)
        lower = copy.copy(page)

        upper.mediabox = [20, 485, 260, 780]
        lower.mediabox = [355, 485, 570, 780]

        new_pdf.pages[0].add_overlay(upper, rect=Rectangle(5, 205, paper_x - 5, paper_y))
        new_pdf.pages[0].add_overlay(lower, rect=Rectangle(0, 0, paper_x, 200))

        tempfile = tempfile.NamedTemporaryFile(delete=False)
        new_pdf.save(tempfile)

        if platform.system() == 'Darwin':  # macOS
            subprocess.call(('open', tempfile.name))
        elif platform.system() == 'Windows':  # Windows
            os.startfile(tempfile.name)
        else:  # linux variants
            subprocess.call(('xdg-open', tempfile.name))