# -*- 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__ = '$Format:%H$'

from qgis.core import QgsCoordinateReferenceSystem, QgsCoordinateTransform, QgsFeature
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 processing.tools import dataobjects, vector


class ReprojectLayer(GeoAlgorithm):

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

    def defineCharacteristics(self):
        self.name = 'Reproject layer'
        self.group = 'Vector general tools'

        self.addParameter(ParameterVector(self.INPUT,
            self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_ANY]))
        self.addParameter(ParameterCrs(self.TARGET_CRS,
            self.tr('Target CRS'), 'EPSG:4326'))

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

    def processAlgorithm(self, progress):
        layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
        crsId = self.getParameterValue(self.TARGET_CRS)
        targetCrs = QgsCoordinateReferenceSystem()
        targetCrs.createFromUserInput(crsId)

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

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

        outFeat = QgsFeature()
        current = 0
        features = vector.features(layer)
        total = 100.0 / float(len(features))
        for f in features:
            geom = f.geometry()
            geom.transform(crsTransform)
            outFeat.setGeometry(geom)
            outFeat.setAttributes(f.attributes())
            writer.addFeature(outFeat)

            current += 1
            progress.setPercentage(int(current * total))

        del writer

        self.crs = targetCrs
