#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Sat Jul 23 19:17:20 EDT 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
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
daname = 't_ref' if 't_ref' in sys.argv else 't_ref_max'
ens = range(1,10+1)
ofile = f'{daname}_AM2.5C360_amipHadISSTlong_chancorr_tigercpu_intelmpi_18_1080PE_{len(ens)}ens_1871-2021_UK.nc'
if os.path.exists(ofile):
    print('[exists]:', ofile)
    sys.exit()

#concat
da_ens = []
for ii in ens:
    ifiles = [f'{daname}_AM2.5C360_amipHadISSTlong_chancorr_tigercpu_intelmpi_18_1080PE_ens{ii}_1871-2019_UK.nc',
        f'{daname}_AM2.5C360_amipHadISSTlong_chancorr_tigercpu_intelmpi_18_1080PE_extend2020_ens{ii}_2020-2020_UK.nc',
        f'{daname}_AM2.5C360_amipHadISSTlong_chancorr_tigercpu_intelmpi_18_1080PE_extend2021_ens{ii}_2021-2021_UK.nc',
        ]
    da = xr.open_mfdataset(ifiles)[daname]
    da_ens.append(da)
da = xr.concat(da_ens, dim='ens')

#shift lon
da = da.roll(lon=-2, roll_coords=True)
lon_new = da.lon.where(da.lon<180, other=da.lon-360).values
da = da.assign_coords(lon=lon_new)

#save
da.to_dataset(name=daname).to_netcdf(ofile)
print('[saved]:', ofile)
 
 
if __name__ == '__main__':
    #from wyconfig import * #my plot settings
    
    #savefig
    if len(sys.argv)>1 and 'savefig' in sys.argv[1:]:
        figname = __file__.replace('.py', f'.png')
        if 'overwritefig' in sys.argv[1:]:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)
    tt.check(f'**Done**')
    print()
    if 'notshowfig' in sys.argv:
        pass
    else:
        plt.show()