# ***************************************************************************
# *   (c) 2009, 2010 Yorik van Havre <yorik@uncreated.net>                  *
# *   (c) 2009, 2010 Ken Cline <cline@frii.com>                             *
# *   (c) 2020 Eliud Cabrera Castillo <e.cabrera-castillo@tum.de>           *
# *                                                                         *
# *   This file is part of the FreeCAD CAx development system.              *
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# *   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.                                 *
# *                                                                         *
# *   FreeCAD 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 FreeCAD; if not, write to the Free Software        *
# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
# *   USA                                                                   *
# *                                                                         *
# ***************************************************************************
"""Provides tools for projecting objects into a 2D plane.

This creates a 2D shape in the 3D view itself. This projection
can be further used to create a technical drawing using
the TechDraw Workbench.
"""
## @package gui_shape2dview
# \ingroup DRAFT
# \brief Provides tools for projecting objects into a 2D plane.

from PySide.QtCore import QT_TRANSLATE_NOOP

import FreeCADGui as Gui
import DraftVecUtils
import Draft_rc
import draftguitools.gui_base_original as gui_base_original
import draftguitools.gui_tool_utils as gui_tool_utils
from draftutils.messages import _msg
from draftutils.translate import translate, _tr

# The module is used to prevent complaints from code checkers (flake8)
True if Draft_rc.__name__ else False


class Shape2DView(gui_base_original.Modifier):
    """Gui Command for the Shape2DView tool."""

    def GetResources(self):
        """Set icon, menu and tooltip."""
        _menu = "Shape 2D view"
        _tip = ("Creates a 2D projection of the selected objects "
                "on the XY plane.\n"
                "The initial projection direction is the negative "
                "of the current active view direction.\n"
                "You can select individual faces to project, or "
                "the entire solid, and also include hidden lines.\n"
                "These projections can be used to create technical "
                "drawings with the TechDraw Workbench.")

        return {'Pixmap': 'Draft_2DShapeView',
                'MenuText': QT_TRANSLATE_NOOP("Draft_Shape2DView", _menu),
                'ToolTip': QT_TRANSLATE_NOOP("Draft_Shape2DView", _tip)}

    def Activated(self):
        """Execute when the command is called."""
        super(Shape2DView, self).Activated(name=_tr("Project 2D view"))
        if not Gui.Selection.getSelection():
            if self.ui:
                self.ui.selectUi()
                _msg(translate("draft", "Select an object to project"))
                self.call = \
                    self.view.addEventCallback("SoEvent",
                                               gui_tool_utils.selectObject)
        else:
            self.proceed()

    def proceed(self):
        """Proceed with the command if one object was selected."""
        if self.call:
            self.view.removeEventCallback("SoEvent", self.call)

        faces = []
        objs = []
        vec = Gui.ActiveDocument.ActiveView.getViewDirection().negative()
        sel = Gui.Selection.getSelectionEx()
        for s in sel:
            objs.append(s.Object)
            for e in s.SubElementNames:
                if "Face" in e:
                    faces.append(int(e[4:]) - 1)
        # print(objs, faces)
        commitlist = []
        Gui.addModule("Draft")
        if len(objs) == 1 and faces:
            _cmd = "Draft.makeShape2DView"
            _cmd += "("
            _cmd += "FreeCAD.ActiveDocument." + objs[0].Name + ", "
            _cmd += DraftVecUtils.toString(vec) + ", "
            _cmd += "facenumbers=" + str(faces)
            _cmd += ")"
            commitlist.append("sv = " + _cmd)
        else:
            n = 0
            for o in objs:
                _cmd = "Draft.makeShape2DView"
                _cmd += "("
                _cmd += "FreeCAD.ActiveDocument." + o.Name + ", "
                _cmd += DraftVecUtils.toString(vec)
                _cmd += ")"
                commitlist.append("sv" + str(n) + " = " + _cmd)
                n += 1
        if commitlist:
            commitlist.append("FreeCAD.ActiveDocument.recompute()")
            self.commit(translate("draft", "Create 2D view"),
                        commitlist)
        self.finish()


Gui.addCommand('Draft_Shape2DView', Shape2DView())