import subprocess
import os, sys
import shutil

folders = [f for f in os.listdir(".") if os.path.isdir(f)]
folders.remove(".css")

for folder in folders:
    pdfs = [f for f in os.listdir(folder) if ".pdf" in f]
    if len(pdfs) == 2 and "NC_" in "".join(pdfs):
        print(pdfs)
        #continue
    if len(pdfs) == 1 and "NC_" not in "".join(pdfs):
        shutil.copy(folder + "/" + pdfs[0], folder + "/NC_"+pdfs[0])
        subprocess.call(["gs", "-sDEVICE=pdfwrite","-dCompatibilityLevel=1.4","-dPDFSETTINGS=/prepress", "-dNOPAUSE","-dQUIET", "-dBATCH", "-sOutputFile="+folder + "/" + pdfs[0], folder + "/NC_"+pdfs[0]])
    if len(pdfs) == 1 and "NC_" in "".join(pdfs):
        filename = pdfs[0][3:]
        subprocess.call(["gs", "-sDEVICE=pdfwrite","-dCompatibilityLevel=1.4","-dPDFSETTINGS=/prepress", "-dNOPAUSE","-dQUIET", "-dBATCH", "-sOutputFile="+folder + "/" + filename, folder + "/"+pdfs[0]])