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

#***************************************************************************
#*                                                                         *
#*   Copyright (c) 2015 Dan Falck <ddfalck@gmail.com>                      *
#*                                                                         *
#*   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                                                                   *
#*                                                                         *
#***************************************************************************
'''Path selection function select a face or faces, two edges, etc to get a dictionary with what was selected in order '''

import FreeCAD,FreeCADGui
import Part
from FreeCAD import Vector

def equals(p1,p2):
    '''returns True if vertexes have same coordinates within precision amount of digits '''
    precision = 12 #hardcoded
    p=precision
    u = Vector(p1.X,p1.Y,p1.Z)
    v = Vector(p2.X,p2.Y,p2.Z)
    vector = (u.sub(v))
    isNull = (round(vector.x,p)==0 and round(vector.y,p)==0 and round(vector.z,p)==0)
    return isNull 




def segments(poly):
    ''' A sequence of (x,y) numeric coordinates pairs '''
    return zip(poly, poly[1:] + [poly[0]])

def check_clockwise(poly):
    '''
     check_clockwise(poly) a function for returning a boolean if the selected wire is clockwise or counter clockwise
     based on point order. poly = [(x1,y1),(x2,y2),(x3,y3)]
    '''
    clockwise = False
    if (sum(x0*y1 - x1*y0 for ((x0, y0), (x1, y1)) in segments(poly))) < 0:
        clockwise = not clockwise
    return clockwise


class FGate:
    def allow(self,doc,obj,sub):
        return (sub[0:4] == 'Face')

class VGate:
    def allow(self,doc,obj,sub):
        return (sub[0:6] == 'Vertex')

class EGate:
    def allow(self,doc,obj,sub):
        return (sub[0:4] == 'Edge')

class ENGRAVEGate:
    def allow(self,doc,obj,sub):
        return (obj.Name[0:11] == 'ShapeString')


def fselect():
    FreeCADGui.Selection.addSelectionGate(FGate())
    FreeCAD.Console.PrintWarning("Face Select Mode\n")

def vselect():
    FreeCADGui.Selection.addSelectionGate(VGate())
    FreeCAD.Console.PrintWarning("Vertex Select Mode\n")

def eselect():
    FreeCADGui.Selection.addSelectionGate(EGate())
    FreeCAD.Console.PrintWarning("Edge Select Mode\n")


def engraveselect():
    FreeCADGui.Selection.addSelectionGate(ENGRAVEGate())
    FreeCAD.Console.PrintWarning("ShapeString Select Mode\n")

def clear():
    FreeCADGui.Selection.removeSelectionGate()
    FreeCAD.Console.PrintWarning("Free Select\n")