# -*- coding: utf-8 -*-
"""
/***************************************************************************
 DsgTools
                                 A QGIS plugin
 Brazilian Army Cartographic Production Tools
                              -------------------
        begin                : 2018-05-01
        git sha              : $Format:%H$
        copyright            : (C) 2018 by Philipe Borba - Cartographic Engineer @ Brazilian Army
        email                : borba.philipe@eb.mil.br
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 builtins import range
from qgis.core import (
    QgsMessageLog,
    QgsVectorLayer,
    QgsGeometry,
    QgsField,
    QgsVectorDataProvider,
    QgsFeatureRequest,
    QgsExpression,
    QgsFeature,
    QgsSpatialIndex,
    Qgis,
    QgsCoordinateTransform,
    QgsWkbTypes,
)
from qgis.PyQt.QtCore import QObject


class AttributeHandler(QObject):
    def __init__(self, iface, parent=None):
        super(AttributeHandler, self).__init__()
        self.parent = parent
        self.iface = iface

    def setFeatureAttributes(
        self, newFeature, attributeDict, editBuffer=None, oldFeat=None
    ):
        """
        Changes attribute values according to the reclassification dict using the edit buffer
        newFeature: newly added
        editBuffer: layer edit buffer
        """
        # setting the attributes using the reclassification dictionary
        fields = newFeature.fields()
        for attribute in attributeDict:
            idx = fields.lookupField(attribute)
            if idx < 0:
                # field was passed a value, but doesn't exist on feature
                continue
            reclass = attributeDict[attribute]
            if isinstance(reclass, dict):
                value = reclass["value"]
                if reclass["ignored"]:  # ignore clause
                    if oldFeat:
                        value = oldFeat[attribute]
                    else:
                        value = None
            else:
                value = reclass
            if value == "":
                continue
            # actual attribute change
            if editBuffer:
                # this way we are working with the edit buffer
                editBuffer.changeAttributeValue(newFeature.id(), idx, value)
            else:
                # this way are working with selected features and inserting a new one in the layer
                newFeature.setAttribute(idx, value)
        # if not editBuffer:
        #     # we should return when under the normal behavior
        return newFeature

    def getTuppleAttribute(self, feature, unifiedLyr, bList=None):
        bList = [] if bList is None else bList
        attributes = [
            field.name()
            for idx, field in enumerate(feature.fields())
            if (
                field.type() != 6
                and idx not in unifiedLyr.primaryKeyAttributes()
                and field.name() not in bList
            )
        ]
        attributes.sort()
        attributeList = ["{0}".format(feature[attribute]) for attribute in attributes]
        return ",".join(attributeList)
