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

"""
***************************************************************************
    gdalcalc.py
    ---------------------
    Date                 : Janaury 2015
    Copyright            : (C) 2015 by Giovanni Manghi
    Email                : giovanni dot manghi at naturalgis dot pt
***************************************************************************
*                                                                         *
*   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__ = 'Giovanni Manghi'
__date__ = 'January 2015'
__copyright__ = '(C) 2015, Giovanni Manghi'

# 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 ParameterString
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterNumber
from processing.core.parameters import ParameterBoolean
from processing.core.parameters import ParameterSelection
from processing.core.parameters import ParameterExtent
from processing.core.parameters import ParameterCrs
from processing.core.outputs import OutputRaster

from processing.tools.system import isWindows

from processing.algs.gdal.GdalUtils import GdalUtils


class gdalcalc(GdalAlgorithm):

    INPUT_A = 'INPUT_A'
    INPUT_B = 'INPUT_B'
    INPUT_C = 'INPUT_C'
    INPUT_D = 'INPUT_D'
    INPUT_E = 'INPUT_E'
    INPUT_F = 'INPUT_F'
    BAND_A = 'BAND_A'
    BAND_B = 'BAND_B'
    BAND_C = 'BAND_C'
    BAND_D = 'BAND_D'
    BAND_E = 'BAND_E'
    BAND_F = 'BAND_F'
    FORMULA = 'FORMULA'
    OUTPUT = 'OUTPUT'
    NO_DATA = 'NO_DATA'
    EXTRA = 'EXTRA'
    RTYPE = 'RTYPE'
    TYPE = ['Byte', 'Int16', 'UInt16', 'UInt32', 'Int32', 'Float32', 'Float64']
    #DEBUG = 'DEBUG'

    def defineCharacteristics(self):
        self.name, self.i18n_name = self.trAlgorithm('Raster calculator')
        self.group, self.i18n_group = self.trAlgorithm('[GDAL] Miscellaneous')
        self.addParameter(ParameterRaster(
            self.INPUT_A, self.tr('Input layer A'), False))
        self.addParameter(ParameterString(self.BAND_A,
                                          self.tr('Number of raster band for raster A'), '1', optional=True))
        self.addParameter(ParameterRaster(
            self.INPUT_B, self.tr('Input layer B'), True))
        self.addParameter(ParameterString(self.BAND_B,
                                          self.tr('Number of raster band for raster B'), '1', optional=True))
        self.addParameter(ParameterRaster(
            self.INPUT_C, self.tr('Input layer C'), True))
        self.addParameter(ParameterString(self.BAND_C,
                                          self.tr('Number of raster band for raster C'), '1', optional=True))
        self.addParameter(ParameterRaster(
            self.INPUT_D, self.tr('Input layer D'), True))
        self.addParameter(ParameterString(self.BAND_D,
                                          self.tr('Number of raster band for raster D'), '1', optional=True))
        self.addParameter(ParameterRaster(
            self.INPUT_E, self.tr('Input layer E'), True))
        self.addParameter(ParameterString(self.BAND_E,
                                          self.tr('Number of raster band for raster E'), '1', optional=True))
        self.addParameter(ParameterRaster(
            self.INPUT_F, self.tr('Input layer F'), True))
        self.addParameter(ParameterString(self.BAND_F,
                                          self.tr('Number of raster band for raster F'), '1', optional=True))
        self.addParameter(ParameterString(self.FORMULA,
                                          self.tr('Calculation in gdalnumeric syntax using +-/* or any numpy array functions (i.e. logical_and())'), 'A*2', optional=False))
        self.addParameter(ParameterString(self.NO_DATA,
                                          self.tr('Set output nodata value'), '-9999'))
        self.addParameter(ParameterSelection(self.RTYPE,
                                             self.tr('Output raster type'), self.TYPE, 5))
        #self.addParameter(ParameterBoolean(
        #    self.DEBUG, self.tr('Print debugging information'), False))
        self.addParameter(ParameterString(self.EXTRA,
                                          self.tr('Additional creation parameters'), '', optional=True))
        self.addOutput(OutputRaster(self.OUTPUT, self.tr('Calculated')))

    def getConsoleCommands(self):
        out = self.getOutputValue(self.OUTPUT)
        extra = unicode(self.getParameterValue(self.EXTRA))
        #debug = self.getParameterValue(self.DEBUG)
        formula = self.getParameterValue(self.FORMULA)
        noData = unicode(self.getParameterValue(self.NO_DATA))

        arguments = []
        arguments.append('--calc')
        arguments.append('"' + formula + '"')
        arguments.append('--format')
        arguments.append(GdalUtils.getFormatShortNameFromFilename(out))
        arguments.append('--type')
        arguments.append(self.TYPE[self.getParameterValue(self.RTYPE)])
        if len(noData) > 0:
            arguments.append('--NoDataValue')
            arguments.append(noData)
        if len(extra) > 0:
            arguments.append(extra)
        #if debug:
        #    arguments.append('--debug')
        arguments.append('-A')
        arguments.append(self.getParameterValue(self.INPUT_A))
        if self.getParameterValue(self.BAND_A):
            arguments.append('--A_band ' + self.getParameterValue(self.BAND_A))
        if self.getParameterValue(self.INPUT_B):
            arguments.append('-B')
            arguments.append(self.getParameterValue(self.INPUT_B))
            if self.getParameterValue(self.BAND_B):
                arguments.append('--B_band ' + self.getParameterValue(self.BAND_B))
        if self.getParameterValue(self.INPUT_C):
            arguments.append('-C')
            arguments.append(self.getParameterValue(self.INPUT_C))
            if self.getParameterValue(self.BAND_C):
                arguments.append('--C_band ' + self.getParameterValue(self.BAND_C))
        if self.getParameterValue(self.INPUT_D):
            arguments.append('-D')
            arguments.append(self.getParameterValue(self.INPUT_D))
            if self.getParameterValue(self.BAND_D):
                arguments.append('--D_band ' + self.getParameterValue(self.BAND_D))
        if self.getParameterValue(self.INPUT_E):
            arguments.append('-E')
            arguments.append(self.getParameterValue(self.INPUT_E))
            if self.getParameterValue(self.BAND_E):
                arguments.append('--E_band ' + self.getParameterValue(self.BAND_E))
        if self.getParameterValue(self.INPUT_F):
            arguments.append('-F')
            arguments.append(self.getParameterValue(self.INPUT_F))
            if self.getParameterValue(self.BAND_F):
                arguments.append('--F_band ' + self.getParameterValue(self.BAND_F))
        arguments.append('--outfile')
        arguments.append(out)

        if isWindows():
            return ['gdal_calc', GdalUtils.escapeAndJoin(arguments)]
        else:
            return ['gdal_calc.py', GdalUtils.escapeAndJoin(arguments)]
