#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Mon Jun 14 11:02:43 EDT 2021
if __name__ == '__main__':
    from misc.timer import Timer
    tt = Timer(f'start {__file__}')
import sys, os.path, os, glob, datetime
import xarray as xr, numpy as np, pandas as pd, matplotlib.pyplot as plt
#more imports
#import xaddon, xfilter, xlearn
import xlinregress, xfilter, xlearn
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
ofile = __file__.replace('.py', '.nc')
if os.path.exists(ofile):
    ds = xr.open_dataset(ofile)
    print('[loaded]:', ofile)
else:
    lowpass = lambda x: x.filter.lowpass(1/40, dim='year', padtype='even')
    #HU
    daname = 'MH'
    ifile = 'ssttc.past1000histrcp85.0850-2100.ens06.nc'
    da = xr.open_dataset(ifile)[daname].sel(year=slice(850,1849))
    models = da.model.values
    hu = da
    #SST
    print('loading sst...')
    ifile = 'ts.ocean.past1000.0850-1849.maxmissing150.ens10.nc'
    da = xr.open_dataarray(ifile).sel(model=models) \
        .load() \
        .groupby('time.year').mean('time')
    sst = da
    #regress
    hu = hu.pipe(lowpass)
    sst = sst.pipe(lowpass).transpose('year', 'model', 'lat', 'lon')
    print('regress...')
    #ds = sst.linregress.on(hu, dim='year')
    ds = sst.linregress.numba(hu, dim='year', ess_on=True)
    print('saving...')
    ds.to_netcdf(ofile)
    print('[saved]:', ofile)

 
if __name__ == '__main__':
    from wyconfig import * #my plot settings
    from geoplots import mapplot
    g = ds.r.plot(col='model', col_wrap=2, robust=True, levels=21, vmax=1, figsize=(8,6))
    for ax,model in zip(g.axes.flat, ds.model.values):
        ds.r.sel(model=model).where(ds.pvalue.sel(model=model)<0.05).pipe(lambda x: x*0).plot.contourf(ax=ax, colors='none', hatches=['//////'], add_colorbar=False)
        mapplot(ax=ax, fill_continents=True)
        ax.grid('on')
    for ax in g.axes[:,1]:
        ax.set_ylabel('')
    for ax in g.axes.flat[:-2]:
        ax.set_xlabel('')
        
    
    #savefig
    if 'savefig' in sys.argv:
        figname = __file__.replace('.py', f'.png')
        wysavefig(figname)
    tt.check(f'**Done**')
    plt.show()