#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Fri Sep 27 13:41:27 EDT 2024
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
import xlinregress
from wyplot_index_NS_EW import wyplot
from misc.landmask import whereocean
#
if __name__ == '__main__':
    try:
        tt.check('end import')
    except:
        pass
#
#start from here
#nonFA
ifile = 't_surf_FLOR_HistRCP45_tigercpu_intelmpi_18_576PE_10ens_1970-2020_annualmean.nc'
da = xr.open_dataarray(ifile).load()
da = da.groupby('time.year').mean('time')
rg = da.linregress.on(da.year, dim='year')
rg0 = rg
#FA
ifiles = [f't_surf_FLOR_HistRCP45_FA_tigercpu_intelmpi_18_576PE_e{ii}_1970-2020_annualmean.nc' for ii in range(1,3+1)]
das = [xr.open_dataset(ifile)['t_surf'].load() for ifile in ifiles]
da = xr.concat(das, dim=pd.Index(range(1,3+1), name='ens'))
da = da.groupby('time.year').mean('time')
rg = da.linregress.on(da.year, dim='year')
rgFA = rg
 
 
if __name__ == '__main__':
    from wyconfig import * #my plot settings
    from geoplots import mapplot
    figsize = 8,3
    levels = np.arange(-1.2, 1.21, 0.1)
    #nonFA
    fig,ax = plt.subplots(figsize=figsize)
    func = lambda x: (x.pipe(whereocean).sel(lat=slice(-40,40))*50).assign_attrs(units='K per 50 years')
    da = rg0.slope.mean('ens').pipe(func)
    da.plot.contourf(levels=levels, center=0, robust=True, extend='both', ax=ax)
    cs = da.plot.contour(levels=[1,], colors='k', linewidths=0.5)
    ax.clabel(cs)
    wyplot(ax=ax)
    mapplot(fill_continents=True)
    ax.set_title(f'FLOR Hist t_surf lintrend: 1970-2020, {rg0.ens.size}ens')
    
    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'__nonFA.png')
        if 'overwritefig' in sys.argv or 'o' in sys.argv:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)
 
    #FA
    fig,ax = plt.subplots(figsize=figsize)
    func = lambda x: (x.pipe(whereocean).sel(lat=slice(-40,40))*50).assign_attrs(units='K per 50 years')
    da = rgFA.slope.mean('ens').pipe(func)
    da.plot.contourf(levels=levels, center=0, robust=True, extend='both', ax=ax)
    cs = da.plot.contour(levels=[1,], colors='k', linewidths=0.5)
    ax.clabel(cs)
    wyplot(ax=ax)
    mapplot(fill_continents=True)
    ax.set_title(f'FLOR_FA Hist t_surf lintrend: 1970-2020, {rgFA.ens.size}ens')
    
    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'__FA.png')
        if 'overwritefig' in sys.argv or 'o' in sys.argv:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)

    #FA-nonFA
    fig,ax = plt.subplots(figsize=figsize)
    func = lambda x: (x.pipe(whereocean).sel(lat=slice(-40,40))*50).assign_attrs(units='K per 50 years')
    da = (rgFA.slope.mean('ens') - rg0.slope.mean('ens')).pipe(func)
    da.plot.contourf(levels=21, center=0, robust=True, extend='both', ax=ax)
    #cs = da.plot.contour(levels=[1,], colors='k', linewidths=0.5)
    #ax.clabel(cs)
    wyplot(ax=ax)
    mapplot(fill_continents=True)
    ax.set_title(f'Hist t_surf lintrend: 1970-2020, FA $-$ nonFA')
    
    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'__FA-nonFA.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()