#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Thu Nov 28 10:06:59 PM EST 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
from misc.seasons import sel_season
from xtc import wherebasin
from misc.landmask import whereocean
from geoplots.cartopy.api import cartoproj, cartofeature
#
if __name__ == '__main__':
    try:
        tt.check('end import')
    except:
        pass
#
#start from here
ifile = 'pviPI_HIRAM_amipLMR2019SST0850ic_tigercpu_intelmpi_18_540PE_ens01_0850-1999.nc'
long_name = 'p(VI)_PI'
da = xr.open_dataarray(ifile)
timeslice_early = slice('1351', '1450')
timeslice_late = slice('1451', '1550')
season = 'ASO'
basin = 'NA'
with xr.set_options(keep_attrs=True):
    da_ref = da.sel(time=timeslice_early).pipe(sel_season, season).mean('time').mean('ens')
    #da_ref = da_ref.pipe(whereocean).pipe(wherebasin, basin).sel(lon=slice(250,360), lat=slice(0,60))
    #da_ref = da_ref.pipe(wherebasin, basin).sel(lon=slice(250,360), lat=slice(0,60))
    da_ref = da_ref.pipe(wherebasin, basin).sel(lon=slice(250,360), lat=slice(0,40))
    daa = da.sel(time=timeslice_late).pipe(sel_season, season).mean('time').mean('ens') \
        - da.sel(time=timeslice_early).pipe(sel_season, season).mean('time').mean('ens')
    #daa = daa.pipe(whereocean).pipe(wherebasin, basin).sel(lon=slice(250,360), lat=slice(0,60))
    #daa = daa.pipe(wherebasin, basin).sel(lon=slice(250,360), lat=slice(0,60))
    daa = daa.pipe(wherebasin, basin).sel(lon=slice(250,360), lat=slice(0,40))
#daa = daa.assign_attrs(long_name=daa.attrs['long_name']+' change')
daa = daa.assign_attrs(long_name=long_name +' change')
 
def wyplot(ax=None, **kws):
    proj = cartoproj('cyl')
    dproj = cartoproj('cyl')
    vmax = kws.pop('vmax', 0.04)
    extend = kws.pop('extend', 'both')
    if ax is None:
        fig = plt.figure(figsize=(6,4))
        ax = fig.add_subplot(projection=proj)
    daa.plot.contourf(levels=21, ax=ax, trasnform=dproj, cbar_kwargs=dict(orientation='horizontal', shrink=0.8), 
        vmax=vmax, extend=extend, **kws)
    cs = da_ref.plot.contour(levels=11, ax=ax, colors='gray', linewidths=0.5, transform=dproj)
    ax.clabel(cs)
    #mapplot(fill_continents=True)
    #mapplot(coastlines_width=1)
    ax.coastlines(color='0.33')
    gl = ax.gridlines(crs=dproj, draw_labels=True, linewidth=0.5, alpha=0.5)
    gl.xlabels_top = False  # Hide labels on the top x-axis
    gl.ylabels_right = False # Hide labels on the right y-axis
    ax.set_extent([260,360,0,40], crs=dproj)
    ax.add_feature(cartofeature('land'), color='k')

    ax.set_title(f'HiRAM {season} {long_name} change from {timeslice_early.start}-{timeslice_early.stop} to {timeslice_late.start}-{timeslice_late.stop}')
    #ax.set_xlim(260,360)
if __name__ == '__main__':
    from wyconfig import * #my plot settings
    #from geoplots import mapplot
    #fig, ax = plt.subplots()
    wyplot(robust=True)
    
    #savefig
    if 'savefig' in sys.argv or 's' in sys.argv:
        figname = __file__.replace('.py', f'.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()