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

"""
***************************************************************************
    TauDEMAlgorithm.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.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.ProcessingLog import ProcessingLog
from processing.core.ProcessingConfig import ProcessingConfig
from processing.core.GeoAlgorithmExecutionException import \
    GeoAlgorithmExecutionException
from processing.core.parameters import getParameterFromString
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterBoolean
from processing.core.parameters import ParameterString
from processing.core.parameters import ParameterNumber
from processing.core.outputs import getOutputFromString
from processing.tools.system import *
from TauDEMUtils import TauDEMUtils


class TauDEMAlgorithm(GeoAlgorithm):

    def __init__(self, descriptionfile):
        GeoAlgorithm.__init__(self)
        self.descriptionFile = descriptionfile
        self.defineCharacteristicsFromFile()

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

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

    def defineCharacteristicsFromFile(self):
        lines = open(self.descriptionFile)
        line = lines.readline().strip('\n').strip()
        self.name = line
        line = lines.readline().strip('\n').strip()
        self.cmdName = line
        line = lines.readline().strip('\n').strip()
        self.group = line
        while line != '':
            try:
                line = line.strip('\n').strip()
                if line.startswith('Parameter'):
                    param = getParameterFromString(line)
                    self.addParameter(param)
                else:
                    self.addOutput(getOutputFromString(line))
                line = lines.readline().strip('\n').strip()
            except Exception, e:
                ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
                                       'Could not load TauDEM algorithm: '
                                       + self.descriptionFile + '\n' + line)
                raise e
        lines.close()

    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))

        for param in self.parameters:
            if param.value is None or param.value == '':
                continue
            if isinstance(param, ParameterNumber):
                commands.append(param.name)
                commands.append(str(param.value))
            if isinstance(param, (ParameterRaster, ParameterVector)):
                commands.append(param.name)
                commands.append(param.value)
            elif isinstance(param, ParameterBoolean):
                if param.value and str(param.value).lower() == 'false':
                    commands.append(param.name)
            elif isinstance(param, ParameterString):
                commands.append(param.name)
                commands.append(str(param.value))

        for out in self.outputs:
            commands.append(out.name)
            commands.append(out.value)

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