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

"""
***************************************************************************
    dinfdistdown.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.                                   *
*                                                                         *
***************************************************************************
"""


__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 PyQt4.QtGui import *

from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.ProcessingLog import ProcessingLog
from processing.core.ProcessingUtils import ProcessingUtils
from processing.core.ProcessingConfig import ProcessingConfig
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException

from processing.parameters.ParameterRaster import ParameterRaster
from processing.parameters.ParameterBoolean import ParameterBoolean
from processing.parameters.ParameterSelection import ParameterSelection

from processing.outputs.OutputRaster import OutputRaster

from processing.taudem.TauDEMUtils import TauDEMUtils

class DinfDistDown(GeoAlgorithm):
    DINF_FLOW_DIR_GRID = "DINF_FLOW_DIR_GRID"
    PIT_FILLED_GRID = "PIT_FILLED_GRID"
    STREAM_GRID = "STREAM_GRID"
    WEIGHT_PATH_GRID = "WEIGHT_PATH_GRID"
    STAT_METHOD = "STAT_METHOD"
    DIST_METHOD = "DIST_METHOD"
    EDGE_CONTAM = "EDGE_CONTAM"

    DIST_DOWN_GRID = "DIST_DOWN_GRID"

    STATISTICS = ["Minimum", "Maximum", "Average"]
    STAT_DICT = {0:"min",
                 1:"max",
                 2:"ave"}

    DISTANCE = ["Pythagoras", "Horizontal", "Vertical", "Surface"]
    DIST_DICT = {0:"p",
                 1:"h",
                 2:"v",
                 3:"s"}

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

    def defineCharacteristics(self):
        self.name = "D-Infinity Distance Down"
        self.cmdName = "dinfdistdown"
        self.group = "Specialized Grid Analysis tools"

        self.addParameter(ParameterRaster(self.DINF_FLOW_DIR_GRID, "D-Infinity Flow Direction Grid", False))
        self.addParameter(ParameterRaster(self.PIT_FILLED_GRID, "Pit Filled Elevation Grid", False))
        self.addParameter(ParameterRaster(self.STREAM_GRID, "Stream Raster Grid", False))
        self.addParameter(ParameterRaster(self.WEIGHT_PATH_GRID, "Weight Path Grid", True))
        self.addParameter(ParameterSelection(self.STAT_METHOD, "Statistical Method", self.STATISTICS, 2))
        self.addParameter(ParameterSelection(self.DIST_METHOD, "Distance Method", self.DISTANCE, 1))
        self.addParameter(ParameterBoolean(self.EDGE_CONTAM, "Check for edge contamination", True))

        self.addOutput(OutputRaster(self.DIST_DOWN_GRID, "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("Wrong number of MPI processes used.\nPlease 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("-ang")
        commands.append(self.getParameterValue(self.DINF_FLOW_DIR_GRID))
        commands.append("-fel")
        commands.append(self.getParameterValue(self.PIT_FILLED_GRID))
        commands.append("-src")
        commands.append(self.getParameterValue(self.STREAM_GRID))
        wg = self.getParameterValue(self.WEIGHT_PATH_GRID)
        if wg is not None:
          commands.append("-wg")
          commands.append(self.getParameterValue(self.WEIGHT_PATH_GRID))
        commands.append("-m")
        commands.append(str(self.STAT_DICT[self.getParameterValue(self.STAT_METHOD)]))
        commands.append(str(self.DIST_DICT[self.getParameterValue(self.DIST_METHOD)]))
        if str(self.getParameterValue(self.EDGE_CONTAM)).lower() == "false":
            commands.append("-nc")
        commands.append("-dd")
        commands.append(self.getOutputValue(self.DIST_DOWN_GRID))

        loglines = []
        loglines.append("TauDEM execution command")
        for line in commands:
            loglines.append(line)
        ProcessingLog.addToLog(ProcessingLog.LOG_INFO, loglines)

        TauDEMUtils.executeTauDEM(commands, progress)

    #def helpFile(self):
    #    return os.path.join(os.path.dirname(__file__), "help", self.cmdName + ".html")