#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Wed Jul 12 13:23:03 EDT 2023
if __name__ == '__main__':
    import sys,os
    from misc.timer import Timer
    tt = Timer(f'[{os.getcwd()}] 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
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
from misc.seasons import sel_season
import xfilter
from wyplot_lines_LMR import das as das_LMR
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
model = 'AM2.1'
lmr = """
2018
2019
""".split()[-1]
season = 'annual'
tspan = [
None,
slice('1551', '1650'),
][-1]
def get_data(region, season=season, tspan=tspan):
    if region == 'North China':
        lonlatbox = '106.120.33.40'
    elif region == 'Northeast China':
        lonlatbox = '122.130.40.46'
    elif region == 'Mongolia':
        lonlatbox = '107.122.40.47'
    ifile = f'precip_AM2.1_amipLMR{lmr}SST0850_ens_tigercpu_intelmpi_18_30PE_5ens_0850-1999_fldmean.{lonlatbox}.nc'
    print(ifile)
    ###
    if tspan is None:
        da = xr.open_dataarray(ifile).load() #only the 5 ens of the last millennium
    else: #concatenate two exps along the ens dim
        da = xr.open_dataarray(ifile).sel(time=tspan)
        da_850 = da
        
        ifile = ifile.replace('0850-1999', '1551-1650').replace('0850', '1551')
        print(ifile)
        da = xr.open_dataarray(ifile).sel(time=tspan)
        da = da.assign_coords(ens=range(6,11))
        da_1551 = da
        
        da = xr.concat([da_850, da_1551], dim='ens')
    
    daa = da.groupby('time.month') - da.groupby('time.month').mean('time').mean('ens')
    daa = daa.pipe(sel_season, season).groupby('time.year').mean('time')

    return daa

das = dict()
region = 'North China'
das[region]  = get_data(region=region)
region = 'Northeast China'
das[region]  = get_data(region=region)
region = 'Mongolia'
das[region]  = get_data(region=region)

dass = dict()
dass['AM2.1'] = das
dass['LMR'] = das_LMR
 
def wyplot(ax=None, region='North China', source='AM2.1',  **kws): 
    if ax is None: fig,ax = plt.subplots()
    #lp = lambda x: x.rolling(year=9, center=True, min_periods=1).mean()
    n_window = 99 if tspan is None else 9
    lp = lambda x: x.filter.lowpass(1/n_window, dim='year', padtype='even')
    da = dass[source][region]
    da_lp = da.pipe(lp)
    mm = da_lp.mean('ens')
    err = da_lp.std('ens')/np.sqrt(da_lp.ens.size)
    ax.fill_between(mm.year, mm-err, mm+err, alpha=0.1, **kws)
    mm.plot(ax=ax, label=region+', '+source, **kws)
    ax.axhline(0, color='gray', ls='--')
    ax.axvspan(1625, 1644, color='gray', alpha=0.1)

    ax.set_ylabel(f'mm/day')
    ax.set_title(f'{season} precip anom, {n_window}LP')

if __name__ == '__main__':
    from wyconfig import * #my plot settings
    region = 'North China'
    fig, ax = plt.subplots()
    wyplot(region='North China', source='LMR',  ax=ax, color='k')
    wyplot(region='North China', source='AM2.1', ax=ax, color='C0')
    ax.legend()

    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'__{region.replace(" ", "")}.png')
        if tspan is None: figname = figname.replace('.png', '_LM.png') #last millennium results, only 5 ens
        if 'overwritefig' in sys.argv or 'o' in sys.argv:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)

    region = 'Northeast China'
    fig, ax = plt.subplots()
    wyplot(region=region, source='LMR',  ax=ax, color='k')
    wyplot(region=region, source='AM2.1', ax=ax, color='C1')
    ax.legend()

    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'__{region.replace(" ", "")}.png')
        if tspan is None: figname = figname.replace('.png', '_LM.png') #last millennium results, only 5 ens
        if 'overwritefig' in sys.argv or 'o' in sys.argv:
            wysavefig(figname, overwritefig=True)
        else:
            wysavefig(figname)

    region = 'Mongolia'
    fig, ax = plt.subplots()
    wyplot(region=region, source='LMR',  ax=ax, color='k')
    wyplot(region=region, source='AM2.1', ax=ax, color='C2')
    ax.legend()

    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'__{region.replace(" ", "")}.png')
        if tspan is None: figname = figname.replace('.png', '_LM.png') #last millennium results, only 5 ens
        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 or 'n' in sys.argv:
        pass
    else:
        if 'plt' in globals(): plt.show()