"""
***************************************************************************
    v_net_flow.py
    ---------------------
    Date                 : December 2015
    Copyright            : (C) 2015 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__ = "December 2015"
__copyright__ = "(C) 2015, Médéric Ribreux"

from qgis.PyQt.QtCore import QCoreApplication

from .v_net import incorporatePoints, variableOutput


def checkParameterValuesBeforeExecuting(alg, parameters, context):
    """Verify if we have the right parameters"""
    params = ["where", "cats"]
    values = []
    for param in params:
        for i in ["source", "sink"]:
            values.append(alg.parameterAsString(parameters, f"{i}_{param}", context))

    if (values[0] or values[2]) and (values[1] or values[3]):
        return True, None

    return False, QCoreApplication.translate(
        "GrassAlgorithmExt",
        "You need to set at least source/sink_where or source/sink_cats parameters for each set!",
    )


def processCommand(alg, parameters, context, feedback):
    incorporatePoints(alg, parameters, context, feedback)


def processOutputs(alg, parameters, context, feedback):
    outputParameter = {
        "output": ["output", "line", 1, True],
        "cut": ["cut", "line", 1, True],
    }
    variableOutput(alg, outputParameter, parameters, context)
