#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Mon Sep 19 13:41:47 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
from misc.seasons import sel_season
import geoxarray
from misc.landmask import whereland
import xfilter
from misc import get_kws_from_argv
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
model = 'AM2.1p1'
model = get_kws_from_argv('model', model)
season = 'JJA'
lmr_version = '2019'
if '2018' in sys.argv: lmr_version = '2018'
lpwindow = 5
lowpass = lambda x: x.filter.lowpass(1/lpwindow, dim='year', padtype='even')
def do_season_mean(da, season, region='NC'):
    if region == 'NC':
        lons = slice(100,120)
        lats = slice(30,40)
    elif region == 'NE':
        lons = slice(120,140)
        lats = slice(40,50)
    print(region, lons, lats)
    print()
    da = da.sel(lon=lons,lat=lats).pipe(whereland)
    #da.isel(time=0, ens=0).plot(); plt.show() #test
    da = da.geo.fldmean() \
        .pipe(sel_season, season=season).groupby('time.year').mean('time')
    return da

ifile = f'precip_{model}_LMR{lmr_version}SST1551_ens_tigercpu_intelmpi_18_30PE_5ens_1551-1650_monthly.nc'
if model == 'AM2.5':
    ifile = ifile.replace('30PE', '540PE').replace('5ens', '3ens')
da = xr.open_dataarray(ifile).load()
 
da_nc = do_season_mean(da, season, region='NC')
print(da_nc)
da_ne = do_season_mean(da, season, region='NE')
print(da_ne)
title = f'{model} {season} precip {lpwindow}-year-LP LMR{lmr_version}SST'
tag = '_' + '_'.join(title.split()).replace('.', 'p')

def wyplot(da, **kws):
    da = da - da.mean('year')
    da = da.pipe(lowpass)
    color = kws.pop('color', 'gray')
    da.plot(hue='ens', add_legend=False, lw=1, color=color, alpha=0.2)
    da.mean('ens').plot(color=color, **kws)
    #plt.axhline(da.mean('ens').mean('year'), color='gray', ls='--')

if __name__ == '__main__':
    from wyconfig import * #my plot settings
    #da.plot(hue='ens', add_legend=False, lw=1, color='gray', alpha=0.2)
    #da.mean('ens').plot(color='C0')
    #plt.axhline(da.mean('ens').mean('year'), color='gray', ls='--')
    wyplot(da_nc, color='C0', label='north-central')
    wyplot(da_ne, color='C1', label='northeast')

    plt.legend()
    plt.title(title)

    
    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'{tag}.png')
        if 'overwritefig' in sys.argv or 'o' in sys.argv:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)
    tt.check(f'**Done**')
    print()
    if 'notshowfig' in sys.argv:
        pass
    else:
        plt.show()