#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Wed Mar  1 11:08:25 EST 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
from misc import get_kws_from_argv
import salem
from misc.wysalem import get_world_shape
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
region = get_kws_from_argv('region', 'NorthPP')
if region == 'NorthPP':
    shapefile = '../shapefiles/North_Philippines/north_pp.shp'
elif region == 'Taiwan':
    shapefile = '../shapefiles/Taiwan/taiwan.shp'
elif region == 'Hunan':
    shapefile = '../shapefiles/Hunan/hunan.shp'
shdf_raw = salem.read_shapefile(shapefile)
#the original shapefile causes error with salem. so extract its geometry values to assign to another shapefile that works
shdf = get_world_shape('New Zealand').iloc[0:1, :]
shdf['geometry'] = shdf_raw['geometry'].values

ifiles = glob.glob('precip_*_threeRegions.nc')
ifiles.sort()
nfiles = len(ifiles)
if nfiles == 3: #for AM2.5C360
    ofile = ifiles[0].replace('ens06', '3ens').replace('threeRegions.nc', f'{region}_masked.nc')
elif nfiles == 10: #for FLOR
    ofile = ifiles[0].replace('ens01', '10ens').replace('threeRegions.nc', f'{region}_masked.nc')
if os.path.exists(ofile):
    print('[exists]:', ofile)
    sys.exit()

print('mask data...')
ds = xr.open_mfdataset(ifiles).load() \
    .salem.subset(shape=shdf, margin=1) \
    .salem.roi(shape=shdf)
print('saving data...')
encoding = {vname:{'zlib': True, 'complevel': 1, 'dtype': 'float32'} for vname in list(ds.data_vars)}
ds.to_netcdf(ofile, encoding=encoding)
print('[saved]:', ofile)
 
 
if __name__ == '__main__':
    #from wyconfig import * #my plot settings
    
    #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)
    tt.check(f'**Done**')
    print()
    if 'notshowfig' in sys.argv or 'n' in sys.argv:
        pass
    else:
        if 'plt' in globals(): plt.show()