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

"""
***************************************************************************
    proximity.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'

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

__revision__ = '$Format:%H$'

from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterString
from processing.core.parameters import ParameterSelection
from processing.core.parameters import ParameterNumber
from processing.core.outputs import OutputRaster
from processing.tools.system import *
from processing.algs.gdal.GdalUtils import GdalUtils


class proximity(GdalAlgorithm):

    INPUT = 'INPUT'
    VALUES = 'VALUES'
    UNITS = 'UNITS'
    MAX_DIST = 'MAX_DIST'
    NODATA = 'NODATA'
    BUF_VAL = 'BUF_VAL'
    OUTPUT = 'OUTPUT'
    RTYPE = 'RTYPE'

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

    DISTUNITS = ['GEO', 'PIXEL']

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

    def defineCharacteristics(self):
        self.name = 'Proximity (raster distance)'
        self.group = '[GDAL] Analysis'
        self.addParameter(ParameterRaster(self.INPUT, 'Input layer', False))
        self.addParameter(ParameterString(self.VALUES, 'Values', ''))
        self.addParameter(ParameterSelection(self.UNITS, 'Dist units',
                          self.DISTUNITS, 0))
        self.addParameter(ParameterNumber(self.MAX_DIST,
                          'Max dist (negative value to ignore)', -1, 9999, -1))
        self.addParameter(ParameterNumber(self.NODATA,
                          'No data (negative value to ignore)', -1, 9999, -1))
        self.addParameter(ParameterNumber(self.BUF_VAL,
                          'Fixed buf val (negative value to ignore)', -1,
                          9999, -1))
        self.addParameter(ParameterSelection(self.RTYPE, 'Output raster type',
			  self.TYPE, 5))
        self.addOutput(OutputRaster(self.OUTPUT, 'Output layer'))

    def processAlgorithm(self, progress):
        output = self.getOutputValue(self.OUTPUT)

        arguments = []
        arguments.append('-ot')
        arguments.append(self.TYPE[self.getParameterValue(self.RTYPE)])
        arguments.append(self.getParameterValue(self.INPUT))
        arguments.append(output)

        arguments.append('-of')
        arguments.append(GdalUtils.getFormatShortNameFromFilename(output))

        arguments.append('-distunits')
        arguments.append(self.DISTUNITS[self.getParameterValue(self.UNITS)])

        values = self.getParameterValue(self.VALUES)
        if len(values) > 0:
            arguments.append('-values')
            arguments.append(values)

        values = str(self.getParameterValue(self.MAX_DIST))
        if values < 0:
            arguments.append('-maxdist')
            arguments.append(values)

        values = str(self.getParameterValue(self.NODATA))
        if values < 0:
            arguments.append('-nodata')
            arguments.append(values)

        values = str(self.getParameterValue(self.BUF_VAL))
        if values < 0:
            arguments.append('-fixed-buf-val')
            arguments.append(values)

        commands = []
        if isWindows():
            commands = ['cmd.exe', '/C ', 'gdal_proximity.bat',
                        GdalUtils.escapeAndJoin(arguments)]
        else:
            commands = ['gdal_proximity.py',
                        GdalUtils.escapeAndJoin(arguments)]

        GdalUtils.runGdal(commands, progress)