#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Wed Jun 19 14:26:51 EDT 2024
# model correction of tau_x used in model running: obs - model
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
#
if __name__ == '__main__':
    try:
        tt.check('end import')
    except:
        pass
#
#start from here
model = 'CM2.1'
#ifile = '/tigress/wenchang/MODEL_OUT/nudgeAll_newdiag_tigercpu_intelmpi_18_576PE/en02/POSTP/20160101.ocean_grid.nc'
#ifile = '/home/wenchang/scratch/CM2.1p1/work/nudgeAllTrop_e1_tigercpu_intelmpi_18_80PE/POSTP/20160101.ocean_month.nc'
ifile = '/projects/GEOCLIM/wenchang/MODEL_OUT/CM2.1p1/CTL1860_tigercpu_intelmpi_18_80PE/POSTP/20010101.ocean_month.nc'
daname_in = 'ht'
daname = 'restore_mask'
ofile = 'restore_mask.nc'
if os.path.exists(ofile):
    print('[exists]:', ofile)
    sys.exit()

#open input data
da = xr.open_dataset(ifile)[daname_in]
#make the mask: 1 over 30S-30N; 0 outside of 45S-45N; linear in between
da = xr.ones_like(da) #initialize with ones
y = da.yt_ocean #model lat
da = da.where(np.abs(y)<=45, other=0) #set 0 outside of 45S-45N
da = da.where((y>45)|(y<30), other=(y-45)/(30-45)) # linear between 30-45N
da = da.where((y>-30)|(y<-45), other=(y+45)/(-30+45)) #linear between 45-30S

#save
da.attrs['long_name'] = f'{model} {daname}'
ds = da.to_dataset(name=daname)
encoding = {dname: {'_FillValue': None} for dname in list(ds.variables)}
ds.to_netcdf(ofile, encoding=encoding)
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()