#!/usr/bin/env python
# -*- coding: utf-8 -*-
############################################################################
#
# MODULE:       t.select
# AUTHOR(S):    Thomas Leppelt, Soeren Gebbert
#
# PURPOSE:      Select maps from space time datasets by topological relationships to
#               other space time datasets using temporal algebra.
# COPYRIGHT:    (C) 2011-2017 by the GRASS Development Team
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#############################################################################

#%module
#% description: Select maps from space time datasets by topological relationships to other space time datasets using temporal algebra.
#% keyword: temporal
#% keyword: metadata
#% keyword: time
#%end

#%option G_OPT_STDS_TYPE
#% guidependency: input
#% guisection: Required
#%end

#%option
#% key: expression
#% type: string
#% description: The temporal mapcalc expression
#% key_desc: expression
#% required : yes
#%end

#%flag
#% key: s
#% description: Check the spatial topology of temporally related maps and select only spatially related maps
#%end

#%flag
#% key: d
#% description: Perform a dry run, compute all dependencies and module calls but don't run them
#%end


import grass.script as grass
import sys

############################################################################

def main():
    # lazy imports
    import grass.temporal as tgis

    expression = options['expression']
    spatial = flags["s"]
    dry_run = flags["d"]
    stdstype = options["type"]

    # Check for PLY istallation
    try:
        import ply.lex as lex
        import ply.yacc as yacc
    except:
        grass.fatal(_("Please install PLY (Lex and Yacc Python implementation) to use the temporal algebra modules."))

    tgis.init(True)
    p = tgis.TemporalAlgebraParser(run=True, debug=False, spatial=spatial, dry_run=dry_run)
    pc = p.parse(expression, stdstype,  overwrite=grass.overwrite())

    if dry_run is True:
        import pprint
        pprint.pprint(pc)


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