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

"""
***************************************************************************
    SagaAlgorithmProvider.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 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__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# 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 processing.saga.SagaAlgorithm import SagaAlgorithm
from processing.saga.SplitRGBBands import SplitRGBBands
from processing.saga.SagaUtils import SagaUtils
from processing.core.ProcessingConfig import ProcessingConfig, Setting
from processing.core.AlgorithmProvider import AlgorithmProvider
from processing.core.ProcessingLog import ProcessingLog
from processing.core.ProcessingUtils import ProcessingUtils

class SagaAlgorithmProvider(AlgorithmProvider):


    def __init__(self):
        AlgorithmProvider.__init__(self)
        self.activate = True
        self.createAlgsList() #preloading algorithms to speed up

    def initializeSettings(self):
        AlgorithmProvider.initializeSettings(self)
        if ProcessingUtils.isWindows():
            ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_FOLDER, "SAGA folder", SagaUtils.sagaPath()))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_AUTO_RESAMPLING, "Use min covering grid system for resampling", True))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_LOG_COMMANDS, "Log execution commands", False))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_LOG_CONSOLE, "Log console output", False))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_RESAMPLING_REGION_XMIN, "Resampling region min x", 0))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_RESAMPLING_REGION_YMIN, "Resampling region min y", 0))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_RESAMPLING_REGION_XMAX, "Resampling region max x", 1000))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_RESAMPLING_REGION_YMAX, "Resampling region max y", 1000))
        ProcessingConfig.addSetting(Setting(self.getDescription(), SagaUtils.SAGA_RESAMPLING_REGION_CELLSIZE, "Resampling region cellsize", 1))

    def unload(self):
        AlgorithmProvider.unload(self)
        if ProcessingUtils.isWindows():
            ProcessingConfig.removeSetting(SagaUtils.SAGA_FOLDER)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_AUTO_RESAMPLING)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_RESAMPLING_REGION_XMIN)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_RESAMPLING_REGION_YMIN)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_RESAMPLING_REGION_XMAX)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_RESAMPLING_REGION_YMAX)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_RESAMPLING_REGION_CELLSIZE)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_LOG_CONSOLE)
        ProcessingConfig.removeSetting(SagaUtils.SAGA_LOG_COMMANDS)

    def createAlgsList(self):
        self.preloadedAlgs = []
        folder = SagaUtils.sagaDescriptionPath()
        for descriptionFile in os.listdir(folder):
            if descriptionFile.endswith("txt"):
                if ProcessingUtils.isWindows() or ProcessingUtils.isMac():
                    if descriptionFile.startswith("2.0.8"):
                        continue
                else:
                    if descriptionFile.startswith("2.1"):
                        continue
                try:
                    alg = SagaAlgorithm(os.path.join(folder, descriptionFile))
                    if alg.name.strip() != "":
                        self.preloadedAlgs.append(alg)
                    else:
                        ProcessingLog.addToLog(ProcessingLog.LOG_ERROR, "Could not open SAGA algorithm: " + descriptionFile)
                except Exception,e:
                    ProcessingLog.addToLog(ProcessingLog.LOG_ERROR, "Could not open SAGA algorithm: " + descriptionFile +"\n" + str(e))
        self.preloadedAlgs.append(SplitRGBBands())

    def _loadAlgorithms(self):
        self.algs = self.preloadedAlgs

    def getDescription(self):
        return "SAGA"

    def getName(self):
        return "saga"

    def getSupportedOutputVectorLayerExtensions(self):
        return ["shp"]

    def getSupportedOutputRasterLayerExtensions(self):
        return ["tif"]

    def getSupportedOutputTableLayerExtensions(self):
        return ["dbf"]

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