#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Tue Feb 18 04:26:56 PM EST 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.seasons import sel_season
#
if __name__ == '__main__':
    try:
        tt.check('end import')
    except:
        pass
#
#start from here
dsname = get_kws_from_argv('dsname', 'sea_surface_temperature')
daname = get_kws_from_argv('daname', 'sst')
season = get_kws_from_argv('season', 'JJASON')
timespan = slice('1979', '2020')
plevels = True if 'plevels' in sys.argv else False
print(daname, '...')
#ifiles = f'/projects/w/wenchang/data/era5/analysis_wy/sea_surface_temperature/daily/era5.sea_surface_temperature.daily.*.nc'
if plevels:
    ifiles = f'/projects/w/wenchang/data/era5/analysis_wy/plevels/{dsname}/daily/era5.{dsname}.daily.*.nc'
else:
    ifiles = f'/projects/w/wenchang/data/era5/analysis_wy/{dsname}/daily/era5.{dsname}.daily.*.nc'
da = xr.open_mfdataset(ifiles)[daname].sel(time=timespan)
units = da.attrs['units']

#time-mean
ofile = f'era5.{daname}.daily.1979-2020.{season}.nc'
if dsname in ('t250',):
    ofile = f'era5.{dsname}.daily.1979-2020.{season}.nc'
if os.path.exists(ofile): 
    print('[exists]:', ofile)
else:
    print(f'{daname} {season} mean...')
    da = da.pipe(sel_season, season).mean('time')
    print(f'{daname} save...')
    da.to_dataset(name=daname).assign_attrs(long_name=f'{dsname} {season} mean', units=units).to_netcdf(ofile)
    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()