#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Tue Jun 29 16:14:32 EDT 2021
if __name__ == '__main__':
    from misc.timer import Timer
    tt = Timer(f'start {__file__}')
import sys, os.path, os, glob, datetime
import xarray as xr, numpy as np, pandas as pd, matplotlib.pyplot as plt
#more imports
import geoxarray
from misc.landmask import flagland
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
if len(sys.argv)>1:
    ifile = sys.argv[1]
else:
    ifile = 'data_precip_AM2.5C360_amip_5ens_1871-202107.nc'
ofile = ifile.replace('.nc', '.masked.nc')
if os.path.exists(ofile):
    print('[exists]', ofile)
    sys.exit()
ds = xr.open_dataset(ifile)
#land only
landflag = flagland(ds)
ds = ds.where(landflag>0.5)
#encoding
daname = list(ds.data_vars)[0]
encoding = {daname: dict(zlib=True, complevel=1)}
print('saving...')
ds.to_netcdf(ofile, encoding=encoding, unlimited_dims='time')
print('[saved]:', ofile)
 
if __name__ == '__main__':
    #from wyconfig import * #my plot settings
    
    #savefig
    if 'savefig' in sys.argv:
        figname = __file__.replace('.py', f'.png')
        wysavefig(figname)
    tt.check(f'**Done**')
    plt.show()