"""
***************************************************************************
    r_resamp_filter.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__ = "February 2016"
__copyright__ = "(C) 2016, Médéric Ribreux"


def checkParameterValuesBeforeExecuting(alg, parameters, context):
    """Verify if we have the right parameters"""
    radius = alg.parameterAsString(parameters, "radius", context)
    x_radius = alg.parameterAsString(parameters, "x_radius", context)
    y_radius = alg.parameterAsString(parameters, "y_radius", context)

    if (not radius and not x_radius and not y_radius) or (
        radius and (x_radius or y_radius)
    ):
        return False, alg.tr("You need to set either radius or x_radius and y_radius!")
    elif (x_radius and not y_radius) or (y_radius and not x_radius):
        return False, alg.tr("You need to set x_radius and y_radius!")
    return True, None
