"""
***************************************************************************
    SetVectorStyle.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
    Email                : volayaf at gmail dot com
***************************************************************************
*                                                                         *
*   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__ = "Victor Olaya"
__date__ = "August 2012"
__copyright__ = "(C) 2012, Victor Olaya"

from qgis.core import (
    QgsProcessingAlgorithm,
    QgsProcessingOutputVectorLayer,
    QgsProcessingParameterFile,
    QgsProcessingParameterVectorLayer,
)

from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm


class SetVectorStyle(QgisAlgorithm):
    INPUT = "INPUT"
    STYLE = "STYLE"
    OUTPUT = "OUTPUT"

    def group(self):
        return self.tr("Vector general")

    def groupId(self):
        return "vectorgeneral"

    def __init__(self):
        super().__init__()

    def flags(self):
        return (
            super().flags()
            | QgsProcessingAlgorithm.Flag.FlagNoThreading
            | QgsProcessingAlgorithm.Flag.FlagDeprecated
            | QgsProcessingAlgorithm.Flag.FlagNotAvailableInStandaloneTool
        )

    def initAlgorithm(self, config=None):
        self.addParameter(
            QgsProcessingParameterVectorLayer(self.INPUT, self.tr("Vector layer"))
        )
        self.addParameter(
            QgsProcessingParameterFile(
                self.STYLE, self.tr("Style file"), extension="qml"
            )
        )
        self.addOutput(QgsProcessingOutputVectorLayer(self.INPUT, self.tr("Styled")))

    def name(self):
        return "setstyleforvectorlayer"

    def displayName(self):
        return self.tr("Set style for vector layer")

    def shortDescription(self):
        return self.tr("Applies the style from a QML file to a vector layer.")

    def shortHelpString(self):
        return self.tr(
            "This algorithm sets the style of a vector layer. The style must be defined in a QML file."
        )

    def processAlgorithm(self, parameters, context, feedback):
        layer = self.parameterAsVectorLayer(parameters, self.INPUT, context)
        style = self.parameterAsFile(parameters, self.STYLE, context)
        layer.loadNamedStyle(style)
        layer.triggerRepaint()
        return {self.INPUT: layer}
