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

"""
***************************************************************************
    Grass7AlgorithmProvider.py
    ---------------------
    Date                 : April 2014
    Copyright            : (C) 2014 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.                                   *
*                                                                         *
***************************************************************************
"""
from builtins import str

__author__ = 'Victor Olaya'
__date__ = 'April 2014'
__copyright__ = '(C) 2014, Victor Olaya'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os
from qgis.core import QgsApplication
from processing.core.ProcessingConfig import ProcessingConfig, Setting
from processing.core.AlgorithmProvider import AlgorithmProvider
from processing.core.ProcessingLog import ProcessingLog
from .Grass7Utils import Grass7Utils
from .Grass7Algorithm import Grass7Algorithm
from processing.tools.system import isWindows, isMac
from .nviz7 import nviz7

pluginPath = os.path.normpath(os.path.join(
    os.path.split(os.path.dirname(__file__))[0], os.pardir))


class Grass7AlgorithmProvider(AlgorithmProvider):

    def __init__(self):
        super().__init__()
        self.createAlgsList()

    def initializeSettings(self):
        AlgorithmProvider.initializeSettings(self)
        if isWindows() or isMac():
            ProcessingConfig.addSetting(Setting(
                self.name(),
                Grass7Utils.GRASS_FOLDER, self.tr('GRASS7 folder'),
                Grass7Utils.grassPath(), valuetype=Setting.FOLDER))
        ProcessingConfig.addSetting(Setting(
            self.name(),
            Grass7Utils.GRASS_LOG_COMMANDS,
            self.tr('Log execution commands'), False))
        ProcessingConfig.addSetting(Setting(
            self.name(),
            Grass7Utils.GRASS_LOG_CONSOLE,
            self.tr('Log console output'), False))
        ProcessingConfig.addSetting(Setting(
            self.name(),
            Grass7Utils.GRASS_HELP_PATH,
            self.tr('Location of GRASS docs'),
            Grass7Utils.grassHelpPath()))

    def unload(self):
        AlgorithmProvider.unload(self)
        if isWindows() or isMac():
            ProcessingConfig.removeSetting(Grass7Utils.GRASS_FOLDER)
        ProcessingConfig.removeSetting(Grass7Utils.GRASS_LOG_COMMANDS)
        ProcessingConfig.removeSetting(Grass7Utils.GRASS_LOG_CONSOLE)
        ProcessingConfig.removeSetting(Grass7Utils.GRASS_HELP_PATH)

    def createAlgsList(self):
        self.preloadedAlgs = []
        folder = Grass7Utils.grassDescriptionPath()
        for descriptionFile in os.listdir(folder):
            if descriptionFile.endswith('txt'):
                try:
                    alg = Grass7Algorithm(os.path.join(folder, descriptionFile))
                    if alg.name.strip() != '':
                        self.preloadedAlgs.append(alg)
                    else:
                        ProcessingLog.addToLog(
                            ProcessingLog.LOG_ERROR,
                            self.tr('Could not open GRASS GIS 7 algorithm: {0}').format(descriptionFile))
                except Exception as e:
                    ProcessingLog.addToLog(
                        ProcessingLog.LOG_ERROR,
                        self.tr('Could not open GRASS GIS 7 algorithm: {0}\n{1}').format(descriptionFile, str(e)))
        self.preloadedAlgs.append(nviz7())

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

    def name(self):
        version = Grass7Utils.installedVersion()
        return 'GRASS GIS ({})'.format(version) if version is not None else "GRASS GIS"

    def id(self):
        return 'grass7'

    def icon(self):
        return QgsApplication.getThemeIcon("/providerGrass.svg")

    def svgIconPath(self):
        return QgsApplication.iconPath("providerGrass.svg")

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

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

    def canBeActivated(self):
        return not bool(Grass7Utils.checkGrass7IsInstalled())