#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Wed Jun  1 22:16:39 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
import xlinregress
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
ifile = 'Vshear.HIRAM.gv_amipHadISSTlongChancorr_tigercpu_intelmpi_18_540PE.5ens.1871-2018.nc'
da = xr.open_dataset(ifile)['Vshear']
da = da.sel(time=slice('1871', '2015')).load()
ens = None 
if ens is None:
    da = da.groupby('time.year').mean('time').mean('ens')
else:
    da = da.groupby('time.year').mean('time').sel(ens=ens)
rg = da.linregress.on(da.year, dim='year')

if __name__ == '__main__':
    from wyconfig import * #my plot settings
    from geoplots import mapplot
    da = rg.slope.pipe(lambda x: x*100).assign_attrs(units='m/s/century', long_name='HiRAM Vshear trend over 1871-2015')
    da.plot.contourf(levels=21)
    mapplot(xticks=range(0,360,60))
    plt.xlabel('')
    plt.ylabel('')
    
    #savefig
    if len(sys.argv)>1 and 'savefig' in sys.argv[1:]:
        figname = __file__.replace('.py', f'.png')
        if ens is not None:
            figname = figname.replace('.png', f'.ens{ens}.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()