import os
import subprocess
from pathlib import Path
import argparse

parser = argparse.ArgumentParser(description="Convert pbrt 4 files of folder into another one")

parser.add_argument('--previous', type=str, help='previous pbrt folder', required=True)
parser.add_argument('--new', type=str, help='new pbrt folder (with all copy)', required=True)
parser.add_argument('--pbrt', type=str, help='pbrt executable', required=True)

args = parser.parse_args()

p_previous = args.previous
p_new      = args.new
p_pbrt     = args.pbrt


command = p_pbrt + " --upgrade {0} > {1}"

os.system('cp -r {0} {1}'.format(p_previous, p_new))

for path in Path(p_previous).rglob('*.pbrt'):
    elements = str(path).split('/')
    head = elements[0]
    del elements[0]
    print(path, '=>', p_new)
    str_command = command.format(path, os.path.join(p_new, os.path.split(path)[-1]))
    subprocess.call(str_command, shell=True)