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

"""
***************************************************************************
    SagaAlgorithm213.py
    ---------------------
    Date                 : December 2014
    Copyright            : (C) 2014 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__ = 'December 2014'
__copyright__ = '(C) 2014, Victor Olaya'

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

__revision__ = '$Format:%H$'

import os

from SagaAlgorithm212 import SagaAlgorithm212
from processing.core.ProcessingConfig import ProcessingConfig
from processing.core.ProcessingLog import ProcessingLog
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
from processing.core.parameters import ParameterRaster, ParameterVector, ParameterTable, ParameterMultipleInput, ParameterBoolean, ParameterFixedTable, ParameterExtent, ParameterNumber, ParameterSelection
from processing.core.outputs import OutputRaster, OutputVector, OutputTable
import SagaUtils
from processing.tools import dataobjects
from processing.tools.system import getTempFilename

sessionExportedLayers = {}


class SagaAlgorithm213(SagaAlgorithm212):

    OUTPUT_EXTENT = 'OUTPUT_EXTENT'

    def getCopy(self):
        newone = SagaAlgorithm213(self.descriptionFile)
        newone.provider = self.provider
        return newone

    def processAlgorithm(self, progress):
        commands = list()
        self.exportedLayers = {}

        self.preProcessInputs()

        # 1: Export rasters to sgrd and vectors to shp
        # Tables must be in dbf format. We check that.
        for param in self.parameters:
            if isinstance(param, ParameterRaster):
                if param.value is None:
                    continue
                if param.value.endswith('sdat'):
                    param.value = param.value[:-4] + "sgrd"
                elif not param.value.endswith('sgrd'):
                    exportCommand = self.exportRasterLayer(param.value)
                    if exportCommand is not None:
                        commands.append(exportCommand)
            if isinstance(param, ParameterVector):
                if param.value is None:
                    continue
                layer = dataobjects.getObjectFromUri(param.value, False)
                if layer:
                    filename = dataobjects.exportVectorLayer(layer)
                    self.exportedLayers[param.value] = filename
                elif not param.value.endswith('shp'):
                    raise GeoAlgorithmExecutionException(
                        self.tr('Unsupported file format'))
            if isinstance(param, ParameterTable):
                if param.value is None:
                    continue
                table = dataobjects.getObjectFromUri(param.value, False)
                if table:
                    filename = dataobjects.exportTable(table)
                    self.exportedLayers[param.value] = filename
                elif not param.value.endswith('shp'):
                    raise GeoAlgorithmExecutionException(
                        self.tr('Unsupported file format'))
            if isinstance(param, ParameterMultipleInput):
                if param.value is None:
                    continue
                layers = param.value.split(';')
                if layers is None or len(layers) == 0:
                    continue
                if param.datatype == ParameterMultipleInput.TYPE_RASTER:
                    for i, layerfile in enumerate(layers):
                        if layerfile.endswith('sdat'):
                            layerfile = param.value[:-4] + "sgrd"
                            layers[i] = layerfile
                        elif not layerfile.endswith('sgrd'):
                            exportCommand = self.exportRasterLayer(layerfile)
                            if exportCommand is not None:
                                commands.append(exportCommand)
                        param.value = ";".join(layers)
                elif param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
                    for layerfile in layers:
                        layer = dataobjects.getObjectFromUri(layerfile, False)
                        if layer:
                            filename = dataobjects.exportVectorLayer(layer)
                            self.exportedLayers[layerfile] = filename
                        elif not layerfile.endswith('shp'):
                            raise GeoAlgorithmExecutionException(
                                self.tr('Unsupported file format'))

        # 2: Set parameters and outputs
        command = self.undecoratedGroup + ' "' + self.cmdname + '"'
        if self.hardcodedStrings:
            for s in self.hardcodedStrings:
                command += ' ' + s

        for param in self.parameters:
            if param.value is None:
                continue
            if isinstance(param, (ParameterRaster, ParameterVector,
                          ParameterTable)):
                value = param.value
                if value in self.exportedLayers.keys():
                    command += ' -' + param.name + ' "' \
                        + self.exportedLayers[value] + '"'
                else:
                    command += ' -' + param.name + ' "' + value + '"'
            elif isinstance(param, ParameterMultipleInput):
                s = param.value
                for layer in self.exportedLayers.keys():
                    s = s.replace(layer, self.exportedLayers[layer])
                command += ' -' + param.name + ' "' + s + '"'
            elif isinstance(param, ParameterBoolean):
                if param.value:
                    command += ' -' + param.name.strip() + " true"
                else:
                    command += ' -' + param.name.strip() + " false"
            elif isinstance(param, ParameterFixedTable):
                tempTableFile = getTempFilename('txt')
                f = open(tempTableFile, 'w')
                f.write('\t'.join([col for col in param.cols]) + '\n')
                values = param.value.split(',')
                for i in range(0, len(values), 3):
                    s = values[i] + '\t' + values[i + 1] + '\t' + values[i
                                                                         + 2] + '\n'
                    f.write(s)
                f.close()
                command += ' -' + param.name + ' "' + tempTableFile + '"'
            elif isinstance(param, ParameterExtent):
                # 'We have to substract/add half cell size, since SAGA is
                # center based, not corner based
                halfcell = self.getOutputCellsize() / 2
                offset = [halfcell, -halfcell, halfcell, -halfcell]
                values = param.value.split(',')
                for i in range(4):
                    command += ' -' + self.extentParamNames[i] + ' ' \
                        + unicode(float(values[i]) + offset[i])
            elif isinstance(param, (ParameterNumber, ParameterSelection)):
                command += ' -' + param.name + ' ' + unicode(param.value)
            else:
                command += ' -' + param.name + ' "' + unicode(param.value) + '"'

        for out in self.outputs:
            command += ' -' + out.name + ' "' + out.getCompatibleFileName(self) + '"'

        commands.append(command)

        # special treatment for RGB algorithm
        #TODO: improve this and put this code somewhere else
        for out in self.outputs:
            if isinstance(out, OutputRaster):
                filename = out.getCompatibleFileName(self)
                filename2 = filename + '.sgrd'
                if self.cmdname == 'RGB Composite':
                    commands.append('io_grid_image 0 -IS_RGB -GRID:"' + filename2
                                    + '" -FILE:"' + filename
                                    + '"')

        # 3: Run SAGA
        commands = self.editCommands(commands)
        SagaUtils.createSagaBatchJobFileFromSagaCommands(commands)
        loglines = []
        loglines.append(self.tr('SAGA execution commands'))
        for line in commands:
            progress.setCommand(line)
            loglines.append(line)
        if ProcessingConfig.getSetting(SagaUtils.SAGA_LOG_COMMANDS):
            ProcessingLog.addToLog(ProcessingLog.LOG_INFO, loglines)
        SagaUtils.executeSaga(progress)

        if self.crs is not None:
            for out in self.outputs:
                if isinstance(out, (OutputVector, OutputRaster)):
                    prjFile = os.path.splitext(out.getCompatibleFileName(self))[0] + ".prj"
                    with open(prjFile, "w") as f:
                        f.write(self.crs.toWkt())
