"""
***************************************************************************
    i_evapo_mh.py
    -------------
    Date                 : February 2016
    Copyright            : (C) 2016 by Médéric Ribreux
    Email                : medspx at medspx dot fr
***************************************************************************
*                                                                         *
*   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.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = "Médéric Ribreux"
__date__ = "March 2016"
__copyright__ = "(C) 2016, Médéric Ribreux"


def checkParameterValuesBeforeExecuting(alg, parameters, context):
    if alg.parameterAsBoolean(parameters, "-h", context) and alg.parameterAsLayer(
        parameters, "precipitation", context
    ):
        return False, alg.tr(
            "You can't use original Hargreaves flag and precipitation parameter together!"
        )
    if not alg.parameterAsBoolean(
        parameters, "-h", context
    ) and not alg.parameterAsLayer(parameters, "precipitation", context):
        return False, alg.tr(
            "If you don't use original Hargreaves flag, you must set the precipitation raster parameter!"
        )
    return True, None
