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

"""
***************************************************************************
    dropanalysis.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.                                   *
*                                                                         *
***************************************************************************
"""
from future import standard_library
standard_library.install_aliases()
from builtins import str

__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__ = '$Format:%H$'

import os

from qgis.PyQt.QtGui import QIcon

from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.ProcessingConfig import ProcessingConfig
from processing.core.GeoAlgorithmExecutionException import \
    GeoAlgorithmExecutionException

from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterNumber
from processing.core.parameters import ParameterBoolean
from processing.core.parameters import ParameterSelection
from processing.core.outputs import OutputFile
from processing.tools import dataobjects

from .TauDEMUtils import TauDEMUtils


class DropAnalysis(GeoAlgorithm):

    PIT_FILLED_GRID = 'PIT_FILLED_GRID'
    D8_CONTRIB_AREA_GRID = 'D8_CONTRIB_AREA_GRID'
    D8_FLOW_DIR_GRID = 'D8_FLOW_DIR_GRID'
    ACCUM_STREAM_SOURCE_GRID = 'ACCUM_STREAM_SOURCE_GRID'
    OUTLETS_SHAPE = 'OUTLETS_SHAPE'
    MIN_TRESHOLD = 'MIN_TRESHOLD'
    MAX_THRESHOLD = 'MAX_THRESHOLD'
    TRESHOLD_NUM = 'TRESHOLD_NUM'
    STEP_TYPE = 'STEP_TYPE'

    DROP_ANALYSIS_FILE = 'DROP_ANALYSIS_FILE'

    def getIcon(self):
        return QIcon(os.path.dirname(__file__) + '/../../images/taudem.svg')

    def defineCharacteristics(self):
        self.name, self.i18n_name = self.trAlgorithm('Stream Drop Analysis')
        self.cmdName = 'dropanalysis'
        self.group, self.i18n_group = self.trAlgorithm('Stream Network Analysis tools')

        self.addParameter(ParameterRaster(self.D8_CONTRIB_AREA_GRID,
                                          self.tr('D8 Contributing Area Grid'), False))
        self.addParameter(ParameterRaster(self.D8_FLOW_DIR_GRID,
                                          self.tr('D8 Flow Direction Grid'), False))
        self.addParameter(ParameterRaster(self.PIT_FILLED_GRID,
                                          self.tr('Pit Filled Elevation Grid'), False))
        self.addParameter(ParameterRaster(self.ACCUM_STREAM_SOURCE_GRID,
                                          self.tr('Accumulated Stream Source Grid'), False))
        self.addParameter(ParameterVector(self.OUTLETS_SHAPE,
                                          self.tr('Outlets Shapefile'),
                                          [dataobjects.TYPE_VECTOR_POINT], False))
        self.addParameter(ParameterNumber(self.MIN_TRESHOLD,
                                          self.tr('Minimum Threshold'), 0, None, 5))
        self.addParameter(ParameterNumber(self.MAX_THRESHOLD,
                                          self.tr('Maximum Threshold'), 0, None, 500))
        self.addParameter(ParameterNumber(self.TRESHOLD_NUM,
                                          self.tr('Number of Threshold Values'), 0, None, 10))
        self.addParameter(ParameterBoolean(self.STEP_TYPE,
                                           self.tr('Use logarithmic spacing for threshold values'), True))
        self.addOutput(OutputFile(self.DROP_ANALYSIS_FILE,
                                  self.tr('D-Infinity Drop to Stream Grid')))

    def processAlgorithm(self, progress):
        commands = []
        commands.append(os.path.join(TauDEMUtils.mpiexecPath(), 'mpiexec'))

        processNum = ProcessingConfig.getSetting(TauDEMUtils.MPI_PROCESSES)
        if processNum <= 0:
            raise GeoAlgorithmExecutionException(
                self.tr('Wrong number of MPI processes used. Please set '
                        'correct number before running TauDEM algorithms.'))

        commands.append('-n')
        commands.append(str(processNum))
        commands.append(os.path.join(TauDEMUtils.taudemPath(), self.cmdName))
        commands.append('-ad8')
        commands.append(self.getParameterValue(self.D8_CONTRIB_AREA_GRID))
        commands.append('-p')
        commands.append(self.getParameterValue(self.D8_FLOW_DIR_GRID))
        commands.append('-fel')
        commands.append(self.getParameterValue(self.PIT_FILLED_GRID))
        commands.append('-ssa')
        commands.append(self.getParameterValue(self.ACCUM_STREAM_SOURCE_GRID))
        commands.append('-o')
        commands.append(self.getParameterValue(self.OUTLETS_SHAPE))
        commands.append('-par')
        commands.append(str(self.getParameterValue(self.MIN_TRESHOLD)))
        commands.append(str(self.getParameterValue(self.MAX_THRESHOLD)))
        commands.append(str(self.getParameterValue(self.TRESHOLD_NUM)))
        commands.append(str(self.getParameterValue(self.STEP_TYPE)))
        commands.append('-drp')
        commands.append(self.getOutputValue(self.DROP_ANALYSIS_FILE))

        TauDEMUtils.executeTauDEM(commands, progress)