#!/usr/bin/env python
# -*- coding: utf-8 -*-

import argparse
import os
from sys import stdout
from subprocess import call

def meshFile(param):
    base, ext = os.path.splitext(param)
    if ext.lower() != '.pyfrm':
        raise argparse.ArgumentTypeError('Mesh file must have a .pyfrm extension')
    return param

parser = argparse.ArgumentParser(description="convert pyfrs files to vtu format")
parser.add_argument("-d", help="level of sub-division", type=int)
parser.add_argument("mesh", help="mesh file (.pyfrm)", type=meshFile)
parser.add_argument("solution", help="solution file(s) (.pyfrs)", nargs="+")
args = parser.parse_args()

if args.d:
    for fn in args.solution:
        call(["pyfr", "export", args.mesh, fn, os.path.splitext(fn)[0] + ".vtu", "-d", str(args.d)])
        stdout.write(".")
        stdout.flush()
else:
    for fn in args.solution:
        call(["pyfr", "export", args.mesh, fn, os.path.splitext(fn)[0] + ".vtu"])
        stdout.write(".")
        stdout.flush()

stdout.write("\n")