"""
***************************************************************************
*                                                                         *
*   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.                                   *
*                                                                         *
***************************************************************************
"""

from qgis.core import (
    QgsProcessingAlgorithm,
    QgsProcessingOutputString,
    QgsProcessingParameterString,
)


class AlgWithComplexParamNames(QgsProcessingAlgorithm):

    # Constants used to refer to parameters and outputs. They will be
    # used when calling the algorithm from another algorithm, or when
    # calling from the QGIS console.

    INPUT = "INPUT with many complex chars.123 a"
    INPUT2 = "another% complex# NaMe"
    OUTPUT = "OUTPUT"

    def createInstance(self):
        return AlgWithComplexParamNames()

    def name(self):
        return "complex .name$"

    def initAlgorithm(self, config=None):
        self.addParameter(QgsProcessingParameterString(self.INPUT, "Input string 1"))
        self.addParameter(QgsProcessingParameterString(self.INPUT2, "Input string 2"))

        self.addOutput(QgsProcessingOutputString(self.OUTPUT, "Output string"))

    def processAlgorithm(self, parameters, context, feedback):
        string1 = self.parameterAsString(parameters, self.INPUT, context)
        string2 = self.parameterAsString(parameters, self.INPUT2, context)

        return {self.OUTPUT: string1.lower() + ":" + string2.lower()}