# -*- 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.tools.system import *
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")