# ***************************************************************************
# *   Copyright (c) 2017 Markus Hovorka <m.hovorka@live.de>                 *
# *   Copyright (c) 2017 Bernd Hahnebach <bernd@bimstatik.org>              *
# *                                                                         *
# *   This file is part of the FreeCAD CAx development system.              *
# *                                                                         *
# *   This program is free software; you can redistribute it and/or modify  *
# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
# *   as published by the Free Software Foundation; either version 2 of     *
# *   the License, or (at your option) any later version.                   *
# *   for detail see the LICENCE text file.                                 *
# *                                                                         *
# *   This program is distributed in the hope that it will be useful,       *
# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
# *   GNU Library General Public License for more details.                  *
# *                                                                         *
# *   You should have received a copy of the GNU Library General Public     *
# *   License along with this program; if not, write to the Free Software   *
# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
# *   USA                                                                   *
# *                                                                         *
# ***************************************************************************

__title__ = "FreeCAD FEM solver base object"
__author__ = "Markus Hovorka"
__url__ = "https://www.freecad.org"

## \addtogroup FEM
#  @{


import FreeCAD as App

from . import run
from femtools.errors import MustSaveError
from femtools.errors import DirectoryDoesNotExistError

if App.GuiUp:
    from PySide import QtGui
    import FreeCADGui as Gui
    from . import solver_taskpanel


class Proxy(object):

    BaseType = "Fem::FemSolverObjectPython"

    def __init__(self, obj):
        obj.Proxy = self
        obj.addExtension("App::GroupExtensionPython")

    def createMachine(self, obj, directory, testmode):
        raise NotImplementedError()

    def createEquation(self, obj, eqId):
        raise NotImplementedError()

    def isSupported(self, equation):
        raise NotImplementedError()

    def addEquation(self, obj, eqId):
        obj.addObject(self.createEquation(
            obj.Document, eqId))

    def editSupported(self):
        return False

    def edit(self, directory):
        raise NotImplementedError()

    def execute(self, obj):
        return True


class ViewProxy(object):
    """Proxy for FemSolverElmers View Provider."""

    def __init__(self, vobj):
        vobj.Proxy = self
        vobj.addExtension("Gui::ViewProviderGroupExtensionPython")

    def setEdit(self, vobj, mode=0):
        try:
            machine = run.getMachine(vobj.Object)
        except MustSaveError:
            error_message = (
                "Please save the file before opening the task panel. "
                "This must be done because the location of the working "
                "directory is set to \"Beside *.FCStd File\"."
            )
            App.Console.PrintError(error_message + "\n")
            QtGui.QMessageBox.critical(
                Gui.getMainWindow(),
                "Can't open Task Panel",
                error_message
            )
            return False
        except DirectoryDoesNotExistError:
            error_message = "Selected working directory doesn't exist."
            App.Console.PrintError(error_message + "\n")
            QtGui.QMessageBox.critical(
                Gui.getMainWindow(),
                "Can't open Task Panel",
                error_message
            )
            return False
        task = solver_taskpanel.ControlTaskPanel(machine)
        Gui.Control.showDialog(task)
        return True

    def unsetEdit(self, vobj, mode=0):
        Gui.Control.closeDialog()

    def doubleClicked(self, vobj):
        if Gui.Control.activeDialog():
            Gui.Control.closeDialog()
        vobj.Document.setEdit(vobj.Object.Name)
        return True

    def attach(self, vobj):
        pass

##  @}