#!/usr/bin/env python
# getgfsnctime
# cory.r.martin@noaa.gov
# 2019-10-17
# script to return initial and valid time 
# for specified netCDF file
import argparse
import gsi_utils
import datetime

if __name__ == '__main__':
  parser = argparse.ArgumentParser(
           description='Get initial/valid time information from a FV3GFS netCDF file')
  parser.add_argument('ncfile', help='path to input netCDF file',
                      type=str)
  parser.add_argument('-i','--init', action='store_true', default=False,
                      help='option to print out initialized time YYYYMMDDHHMM')
  parser.add_argument('-v','--valid', action='store_true', default=False,
                      help='option to print out valid time YYYYMMDDHHMM')
  parser.add_argument('-f','--fhour', action='store_true', default=False,
                      help='option to print out forecast hour')
  args = parser.parse_args()
  inittime, validtime, nfhour = gsi_utils.get_timeinfo(args.ncfile)
  if args.init:
     print(inittime.strftime("%Y%m%d%H%M"))
  elif args.valid:
     print(validtime.strftime("%Y%m%d%H%M"))
  elif args.fhour:
     print(nfhour)
  else:
     print(args.ncfile)
     print('Initial time: '+inittime.strftime("%Y-%m-%d %H:%M"))
     print('Valid time: '+validtime.strftime("%Y-%m-%d %H:%M"))
     print('Forecast hour: '+str(nfhour))