#! /usr/bin/env python
# -*- mode: python; coding: utf-8 -*-
# Copyright (c) 2018 Radio Astronomy Software Group
# Licensed under the 2-clause BSD License
"""Read in a uvfits file and write a new one out."""

from __future__ import absolute_import, division, print_function

import argparse
import os.path as op
from pyuvdata import UVData

parser = argparse.ArgumentParser()
parser.add_argument('uvfits_read',
                    help='name of a uvfits file to read in')
parser.add_argument('uvfits_write',
                    help='name of a uvfits file to write out')

args = parser.parse_args()

uvfits_file_in = args.uvfits_read
if not op.isfile(uvfits_file_in):
    raise IOError('There is no file named {}'.format(args.uvfits_file_in))

uvfits_file_out = args.uvfits_write

this_uv = UVData()
this_uv.read_uvfits(uvfits_file_in)

this_uv.write_uvfits(uvfits_file_out)

del(this_uv)