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

"""
***************************************************************************
    rasterize.py
    ---------------------
    Date                 : September 2013
    Copyright            : (C) 2013 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__ = 'September 2013'
__copyright__ = '(C) 2013, Alexander Bruy'

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

__revision__ = '$Format:%H$'

import os

from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterTableField
from processing.core.parameters import ParameterSelection
from processing.core.parameters import ParameterNumber
from processing.core.parameters import ParameterBoolean
from processing.core.outputs import OutputRaster
from processing.algs.gdal.GdalUtils import GdalUtils


class rasterize(GdalAlgorithm):

    INPUT = 'INPUT'
    FIELD = 'FIELD'
    DIMENSIONS = 'DIMENSIONS'
    WIDTH = 'WIDTH'
    HEIGHT = 'HEIGHT'
    WRITEOVER = 'WRITEOVER'
    RTYPE = 'RTYPE'
    OUTPUT = 'OUTPUT'

    TYPE = ['Byte', 'Int16', 'UInt16', 'UInt32', 'Int32', 'Float32', 'Float64',
            'CInt16', 'CInt32', 'CFloat32', 'CFloat64']

    def commandLineName(self):
        return "gdalogr:rasterize"

    def defineCharacteristics(self):
        self.name = 'Rasterize (vector to raster)'
        self.group = '[GDAL] Conversion'
        self.addParameter(ParameterVector(self.INPUT, self.tr('Input layer')))
        self.addParameter(ParameterTableField(self.FIELD,
            self.tr('Attribute field'), self.INPUT))
        self.addParameter(ParameterBoolean(self.WRITEOVER,
            self.tr('Write values inside an existing raster layer(*)'), False))
        self.addParameter(ParameterSelection(self.DIMENSIONS,
            self.tr('Set output raster size (ignored if above option is checked)'),
            ['Output size in pixels', 'Output resolution in map units per pixel'], 1))
        self.addParameter(ParameterNumber(self.WIDTH,
            self.tr('Horizontal'), 0.0, 99999999.999999, 100.0))
        self.addParameter(ParameterNumber(self.HEIGHT,
            self.tr('Vertical'), 0.0, 99999999.999999, 100.0))
        self.addParameter(ParameterSelection(self.RTYPE, self.tr('Raster type'),
            self.TYPE, 0))

        self.addOutput(OutputRaster(self.OUTPUT,
            self.tr('Output layer: mandatory to choose an existing raster layer if the (*) option is selected')))

    def processAlgorithm(self, progress):
        writeOver = self.getParameterValue(self.WRITEOVER)

        arguments = []
        arguments.append('-a')
        arguments.append(str(self.getParameterValue(self.FIELD)))

        if not writeOver:
             arguments.append('-ot')
             arguments.append(self.TYPE[self.getParameterValue(self.RTYPE)])
        dimType = self.getParameterValue(self.DIMENSIONS)
        if dimType == 0:
            # size in pixels
            arguments.append('-ts')
            arguments.append(str(self.getParameterValue(self.WIDTH)))
            arguments.append(str(self.getParameterValue(self.HEIGHT)))
        else:
             # resolution in map units per pixel
             arguments.append('-tr')
             arguments.append(str(self.getParameterValue(self.WIDTH)))
             arguments.append(str(self.getParameterValue(self.HEIGHT)))

        arguments.append('-l')
        arguments.append(
            os.path.basename(os.path.splitext(unicode(self.getParameterValue(self.INPUT)))[0]))
        arguments.append(unicode(self.getParameterValue(self.INPUT)))

        arguments.append(unicode(self.getOutputValue(self.OUTPUT)))

        GdalUtils.runGdal(['gdal_rasterize',
                          GdalUtils.escapeAndJoin(arguments)], progress)