#!/usr/bin/env python

#%module
#% description: Timestamps Sentinel bands from current mapset.
#%end
#%option G_OPT_F_OUTPUT
#%end

import sys
import os
from datetime import datetime, timedelta

import grass.script as gs

from grass.pygrass.gis import Mapset

def main():
    mapset = Mapset()
    mapset.current()

    with open(options['output'], 'w') as fd:
        for rast in mapset.glist('raster'):
            items = rast.split('_')
            d = datetime.strptime(items[2], '%Y%m%dT%H%M%S')
            #fd.write("{0}|{1}{2}".format(rast, iso_date, os.linesep))
            ## workaround
            dd = d + timedelta(seconds=1)
            fd.write("{0}|{1}|{2}{3}".format(
                rast,
                d.strftime('%Y-%m-%d %H:%M:%S'),
                dd.strftime('%Y-%m-%d %H:%M:%S'),
                os.linesep))
        
    return 0

if __name__ == "__main__":
    options, flags = gs.parser()
    
    sys.exit(main())