#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Thu Jul 13 10:53:54 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.landmask import whereland
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
#ifile = '/tigress/wenchang/data/LMR/v2.1/prate_MCruns_ensemble_mean_LMRv2.1.nc'
#ifile = '/tigress/wenchang/data/LMR/v2.1/pdsi_MCruns_ensemble_mean_LMRv2.1.nc'
ifile = '/tigress/wenchang/data/MADA/mada.nc'
ds = xr.open_dataset(ifile)
da = ds.pdsi
#da = ds.pdsi.sel(time=slice('1551', '1650')).mean('MCrun')
#da = da.groupby('time.year').mean('time')
#daa = da - da.mean('year')
#daa = (daa*24*3600).assign_attrs(units='mm/day')
daa = da
def plot_lonlatbox(region='North China', ax=None, **kws):
    if ax is None: fig, ax = plt.subplots()
    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
    lonmin, lonmax, latmin, latmax = lonlatbox
    ax.plot([lonmin, lonmax, lonmax, lonmin, lonmin], [latmin, latmin, latmax, latmax, latmin], ls='--', **kws)
    ax.text((lonmin+lonmax)/2, (latmin+latmax)/2, region, ha='center', va='center', color='gray')

if __name__ == '__main__':
    from wyconfig import * #my plot settings
    from geoplots import mapplot
    fig,ax = plt.subplots()
    lonspan = slice(95, 140)
    latspan = slice(25, 50)
    #yearspan = slice(1625, 1644)
    #yearspan = slice(1615, 1644)
    #yearspan = slice(1635, 1644)
    yearspan = slice(1600, 1625)
    levels = 25
    cmap = 'BrBG'
    daa.sel(year=yearspan).mean('year').sel(lon=lonspan, lat=latspan).pipe(whereland).plot(levels=levels, cmap=cmap, vmax=2.4, vmin=-2.4)
    mapplot()
    ax.set_prop_cycle(None)
    plot_lonlatbox('North China', ax=ax)
    plot_lonlatbox('Northeast China', ax=ax)
    plot_lonlatbox('Mongolia', ax=ax)

    ax.set_title(f'MADA pdsi over {yearspan.start}-{yearspan.stop}')
    ax.set_xlabel('')
    ax.set_ylabel('')
    
    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'__{yearspan.start}-{yearspan.stop}.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 or 'n' in sys.argv:
        pass
    else:
        if 'plt' in globals(): plt.show()