#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Wed Dec 14 09:50:06 EST 2022
if __name__ == '__main__':
    import sys
    from misc.timer import Timer
    tt = Timer('start ' + ' '.join(sys.argv))
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.seasons import sel_season
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
#ifile = 't_ref_max_FLOR_HistRCP45_tigercpu_intelmpi_18_576PE_10ens_1860-2100_Argentina_masked.nc'
#ifile = sys.argv[1] if len(sys.argv)>1 and sys.argv[1].endswith('.nc') \
#    else 'precip_AM2.5C360_amipHadISSTrcp45_tigercpu_intelmpi_18_1080PE_3ens_1871-2050_NewZealand_masked.nc'
season = """
OND
MAM
2year
""".split()[-1]
ifile = glob.glob('precip_*_masked.nc')[0]
ofile = ifile.replace('masked.nc', f'{season}index.nc')
daname = f'precip'
units = 'mm'
long_name = f'{season} precip'
if os.path.exists(ofile):
    print('[exists]:', ofile)
    da = xr.open_dataarray(ofile)
else:
    #make index
    print('loading...')
    da = xr.open_dataarray(ifile).load()
    #daname = da.name
    print('making index...')
    if season == '2year': #2-year accumulation
        da = da.geo.fldmean() \
            .groupby('time.year').sum('time') \
            .rolling(year=2, center=False, min_periods=2).sum() \
            .assign_attrs(units=units, long_name=long_name)
    else: #season sum
        da = da.geo.fldmean() \
            .pipe(sel_season, season).groupby('time.year').sum('time') \
            .assign_attrs(units=units, long_name=long_name)
    #print(da); sys.exit()
    
    #save
    print('saving...')
    da.to_dataset(name=daname).to_netcdf(ofile)
    print('[saved]:', ofile)
 
 
if __name__ == '__main__':
    from wyconfig import * #my plot settings
    #da.mean('ens', keep_attrs=True).plot()
    da.plot(hue='ens')
    
    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'.{season}.png')
        if 'overwritefig' in sys.argv or 'o' in sys.argv:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)
    tt.check(f'**Done**')
    print()
    if 'notshowfig' in sys.argv:
        pass
    else:
        plt.show()