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

"""
***************************************************************************
    RAlgorithmProvider.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.                                   *
*                                                                         *
***************************************************************************
"""
from builtins import str

__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 qgis.PyQt.QtCore import QCoreApplication
from qgis.core import (QgsApplication,
                       QgsProcessingProvider)
from processing.core.ProcessingConfig import ProcessingConfig, Setting
from processing.core.ProcessingLog import ProcessingLog
from processing.gui.EditScriptAction import EditScriptAction
from processing.gui.DeleteScriptAction import DeleteScriptAction
from processing.gui.CreateNewScriptAction import CreateNewScriptAction
from processing.script.WrongScriptException import WrongScriptException
from processing.gui.GetScriptsAndModels import GetRScriptsAction
from processing.gui.ProviderActions import (ProviderActions,
                                            ProviderContextMenuActions)
from processing.tools.system import isWindows

from .RUtils import RUtils
from .RAlgorithm import RAlgorithm

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


class RAlgorithmProvider(QgsProcessingProvider):

    def __init__(self):
        super().__init__()
        self.algs = []
        self.actions = []
        self.actions.append(CreateNewScriptAction(
            'Create new R script', CreateNewScriptAction.SCRIPT_R))
        self.actions.append(GetRScriptsAction())
        self.contextMenuActions = \
            [EditScriptAction(EditScriptAction.SCRIPT_R),
             DeleteScriptAction(DeleteScriptAction.SCRIPT_R)]

    def load(self):
        ProcessingConfig.settingIcons[self.name()] = self.icon()
        ProcessingConfig.addSetting(Setting(self.name(), 'ACTIVATE_R',
                                            self.tr('Activate'), False))
        ProcessingConfig.addSetting(Setting(
            self.name(), RUtils.RSCRIPTS_FOLDER,
            self.tr('R Scripts folder'), RUtils.defaultRScriptsFolder(),
            valuetype=Setting.MULTIPLE_FOLDERS))
        if isWindows():
            ProcessingConfig.addSetting(Setting(
                self.name(),
                RUtils.R_FOLDER, self.tr('R folder'), RUtils.RFolder(),
                valuetype=Setting.FOLDER))
            ProcessingConfig.addSetting(Setting(
                self.name(),
                RUtils.R_LIBS_USER, self.tr('R user library folder'),
                RUtils.RLibs(), valuetype=Setting.FOLDER))
            ProcessingConfig.addSetting(Setting(
                self.name(),
                RUtils.R_USE64, self.tr('Use 64 bit version'), False))
        ProviderActions.registerProviderActions(self, self.actions)
        ProviderContextMenuActions.registerProviderContextMenuActions(self.contextMenuActions)
        return True

    def unload(self):
        ProcessingConfig.removeSetting('ACTIVATE_R')
        ProcessingConfig.removeSetting(RUtils.RSCRIPTS_FOLDER)
        if isWindows():
            ProcessingConfig.removeSetting(RUtils.R_FOLDER)
            ProcessingConfig.removeSetting(RUtils.R_LIBS_USER)
            ProcessingConfig.removeSetting(RUtils.R_USE64)
        ProviderActions.deregisterProviderActions(self)
        ProviderContextMenuActions.deregisterProviderContextMenuActions(self.contextMenuActions)

    def isActive(self):
        return ProcessingConfig.getSetting('ACTIVATE_R')

    def setActive(self, active):
        ProcessingConfig.setSettingValue('ACTIVATE_R', active)

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

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

    def name(self):
        return 'R scripts'

    def id(self):
        return 'r'

    def loadAlgorithms(self):
        folders = RUtils.RScriptsFolders()
        self.algs = []
        for f in folders:
            self.loadFromFolder(f)

        folder = os.path.join(os.path.dirname(__file__), 'scripts')
        self.loadFromFolder(folder)
        for a in self.algs:
            self.addAlgorithm(a)

    def loadFromFolder(self, folder):
        if not os.path.exists(folder):
            return
        for path, subdirs, files in os.walk(folder):
            for descriptionFile in files:
                if descriptionFile.endswith('rsx'):
                    try:
                        fullpath = os.path.join(path, descriptionFile)
                        alg = RAlgorithm(fullpath)
                        if alg.name().strip() != '':
                            self.algs.append(alg)
                    except WrongScriptException as e:
                        ProcessingLog.addToLog(ProcessingLog.LOG_ERROR, e.msg)
                    except Exception as e:
                        ProcessingLog.addToLog(
                            ProcessingLog.LOG_ERROR,
                            self.tr('Could not load R script: {0}\n{1}').format(descriptionFile, str(e)))
        return

    def tr(self, string, context=''):
        if context == '':
            context = 'RAlgorithmProvider'
        return QCoreApplication.translate(context, string)