#!/usr/bin/env python
# Wenchang Yang (wenchang@princeton.edu)
# Fri Feb 17 10:30:04 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
#
if __name__ == '__main__':
    tt.check('end import')
#
#start from here
#location: Nepal Lalitpur latitude longitude
locname, lat0, lon0 = 'Lalitpur', 27.6588, 85.3247
daname = 'precip'
years = range(1981, 2022+1)
method = 'selnearest' #alternative is interp 
method = get_kws_from_argv('method', method)

ofile = f'chirps.{daname}.daily.{method}{locname}.{years[0]}-{years[-1]}.nc'
if os.path.exists(ofile):
    print('[exists]:', ofile)
    xr.open_dataarray(ofile).plot()
    sys.exit()

das = []
for year in years:
    print(f'{year} of {years[-1]}')
    #example: ifile = /tigress/wenchang/data/chirps/daily/p25/chirps-v2.0.2022.days_p25.nc
    ifile = f'/tigress/wenchang/data/chirps/daily/p25/chirps-v2.0.{year}.days_p25.nc'
    print(ifile)
    da = xr.open_dataarray(ifile)
    units = da.attrs['units']
    if method == 'selnearest':
        da = da.sel(latitude=lat0, longitude=lon0, method='nearest')
    elif method == 'interp':
        da = da.interp(latitude=lat0, longitude=lon0)
    da.load()
    das.append(da)
print('concat...')
da = xr.concat(das, dim='time')
#units
da.attrs['units'] = units
    

#save
da.to_dataset(name=daname).to_netcdf(ofile)
print('[saved]:', ofile)
 
if __name__ == '__main__':
    from wyconfig import * #my plot settings
    da.plot()
    
    #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()