#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Thu Oct 30 10:42:24 AM EDT 2025
if __name__ == '__main__':
    import sys,os
    try:
        from misc.timer import Timer
        tt = Timer(f'[{os.getcwd()}] start ' + ' '.join(sys.argv))
    except:
        pass
import sys, os.path, os, glob, datetime
import xarray as xr, numpy as np, pandas as pd, matplotlib.pyplot as plt
#more imports
wython = '/tigress/wenchang/wython'
if wython not in sys.path: sys.path.append(wython); print('added to python path:', wython)
#from misc import get_kws_from_argv
from misc.landmask import whereocean
#
if __name__ == '__main__':
    try:
        tt.check('end import')
    except:
        pass
#
#start from here
ifile = sys.argv[1]
ofile = ifile.replace('.nc', '_oceanonly.nc')
if os.path.exists(ofile): print('[exists]:', ofile); sys.exit()
#
print('load...')
ds = xr.open_dataset(ifile)#.load()
ds = ds.pipe(whereocean)

#save
print('save...')
daname = list(ds.data_vars)[0]
encoding = {daname:{'zlib': True, 'complevel': 1}}
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 or 's' in sys.argv:
        figname = __file__.replace('.py', f'.png')
        if 'overwritefig' in sys.argv or 'o' in sys.argv:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)
 
    try:
        tt.check(f'**Done**')
    except:
        pass
    print()
    if 'notshowfig' in sys.argv or 'n' in sys.argv:
        pass
    else:
        if 'plt' in globals(): plt.show()