# -*- coding: utf-8 -*-

"""
***************************************************************************
    ReprojectLayer.py
    ---------------------
    Date                 : October 2012
    Copyright            : (C) 2012 by Alexander Bruy
    Email                : alexander dot bruy 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__ = 'Alexander Bruy'
__date__ = 'October 2012'
__copyright__ = '(C) 2012, Alexander Bruy'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os

from qgis.core import QgsCoordinateReferenceSystem, QgsCoordinateTransform, QgsFeature, QgsProcessingUtils
from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterCrs
from processing.core.outputs import OutputVector
from qgis.PyQt.QtGui import QIcon

pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]


class ReprojectLayer(GeoAlgorithm):

    INPUT = 'INPUT'
    TARGET_CRS = 'TARGET_CRS'
    OUTPUT = 'OUTPUT'

    def icon(self):
        return QIcon(os.path.join(pluginPath, 'images', 'gdaltools', 'warp.png'))

    def tags(self):
        return self.tr('transform,reproject,crs,srs,warp').split(',')

    def group(self):
        return self.tr('Vector general tools')

    def name(self):
        return 'reprojectlayer'

    def displayName(self):
        return self.tr('Reproject layer')

    def defineCharacteristics(self):
        self.addParameter(ParameterVector(self.INPUT,
                                          self.tr('Input layer')))
        self.addParameter(ParameterCrs(self.TARGET_CRS,
                                       self.tr('Target CRS'), 'EPSG:4326'))

        self.addOutput(OutputVector(self.OUTPUT, self.tr('Reprojected')))

    def processAlgorithm(self, context, feedback):
        layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
        crsId = self.getParameterValue(self.TARGET_CRS)
        targetCrs = QgsCoordinateReferenceSystem()
        targetCrs.createFromUserInput(crsId)

        writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields().toList(), layer.wkbType(),
                                                                     targetCrs, context)

        layerCrs = layer.crs()
        crsTransform = QgsCoordinateTransform(layerCrs, targetCrs)

        outFeat = QgsFeature()
        features = QgsProcessingUtils.getFeatures(layer, context)
        total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
        for current, f in enumerate(features):
            geom = f.geometry()
            geom.transform(crsTransform)
            outFeat.setGeometry(geom)
            outFeat.setAttributes(f.attributes())
            writer.addFeature(outFeat)

            feedback.setProgress(int(current * total))

        del writer

        self.crs = targetCrs