# ***************************************************************************
# *   Copyright (c) 2023 edi <edi271@a1.net>                                *
# *                                                                         *
# *   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.                   *
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# *   This program is distributed in the hope that it will be useful,       *
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# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
# *   GNU Library General Public License for more details.                  *
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# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
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# *                                                                         *
# ***************************************************************************
"""
Provides the TechDraw AxoLengthDimension GuiCommand.
00.01 2023/02/01 Basic version
00.02 2023/12/07 Calculate real 3D values if parallel to coordinate axis
"""

__title__ = "TechDrawTools.CommandAxoLengthDimension"
__author__ = "edi"
__url__ = "https://www.freecad.org"
__version__ = "00.02"
__date__ = "2023/12/07"

from PySide.QtCore import QT_TRANSLATE_NOOP

import FreeCAD as App
import FreeCADGui as Gui

import TechDrawTools.TDToolsUtil as Utils

import TechDraw
from math import degrees

class CommandAxoLengthDimension:
    """Creates a 3D length dimension."""

    def __init__(self):
        """Initialize variables for the command that must exist at all times."""
        pass

    def GetResources(self):
        """Return a dictionary with data that will be used by the button or menu item."""
        return {'Pixmap': 'actions/TechDraw_AxoLengthDimension.svg',
                'Accel': "",
                'MenuText': QT_TRANSLATE_NOOP("TechDraw_AxoLengthDimension", "Axonometric length dimension"),
                'ToolTip': QT_TRANSLATE_NOOP("TechDraw_AxoLengthDimension", "Create an axonometric length dimension<br>\
                - select first edge to define direction and length of the dimension line<br>\
                - select second edge to define the direction of the extension lines<br>\
                - optional: select two more vertexes which define the measurement instead of the length<br>\
                  of the first selected edge")}

    def Activated(self):
        """Run the following code when the command is activated (button press)."""
        vertexes = []
        edges = []
        if Utils.getSelEdges(2):
            edges = Utils.getSelEdges(2)
            vertexes = Utils.getSelVertexes(0)

        if len(vertexes)<2:
            vertexes.append(edges[0].Vertexes[0])
            vertexes.append(edges[0].Vertexes[1])

        view = Utils.getSelView()
        scale = view.getScale()

        StartPt, EndPt = edges[1].Vertexes[0].Point, edges[1].Vertexes[1].Point
        extLineVec = EndPt.sub(StartPt)
        StartPt, EndPt = edges[0].Vertexes[0].Point, edges[0].Vertexes[1].Point
        dimLineVec = EndPt.sub(StartPt)
        xAxis = App.Vector(1,0,0)
        extAngle = degrees(extLineVec.getAngle(xAxis))
        lineAngle = degrees(dimLineVec.getAngle(xAxis))

        if extLineVec.y < 0.0:
            extAngle = 180-extAngle
        if dimLineVec.y < 0.0:
            lineAngle = 180-lineAngle
        if abs(extAngle-lineAngle)>0.1:
            distanceDim=TechDraw.makeDistanceDim(view,'Distance',vertexes[0].Point*scale,vertexes[1].Point*scale)
            distanceDim.AngleOverride = True
            distanceDim.LineAngle = lineAngle
            distanceDim.ExtensionAngle = extAngle
            distanceDim.X = (vertexes[0].Point.x+vertexes[1].Point.x)/2
            distanceDim.Y = (vertexes[0].Point.y+vertexes[1].Point.y)/2
            distanceDim.recompute()

            (px,py,pz) = Utils.getCoordinateVectors(view)
            arrowTips = distanceDim.getArrowPositions()
            value2D = (arrowTips[1].sub(arrowTips[0])).Length
            value3D = 1.0
            if px.isParallel(dimLineVec,0.1):
                value3D = value2D/px.Length
            elif py.isParallel(dimLineVec,0.1):
                value3D = value2D/py.Length
            elif pz.isParallel(dimLineVec,0.1):
                value3D = value2D/pz.Length
            if value3D != 1.0:
                fomatted3DValue = self._formatValueToSpec(value3D,distanceDim.FormatSpec)
                distanceDim.Arbitrary = True
                distanceDim.Label = distanceDim.Label.replace('Dimension','Dimension3D')
                distanceDim.FormatSpec = fomatted3DValue

            distanceDim.recompute()
            view.requestPaint()
        Gui.Selection.clearSelection()

    def IsActive(self):
        """Return True when the command should be active or False when it should be disabled (greyed)."""
        if App.ActiveDocument:
            return Utils.havePage() and Utils.haveView()
        else:
            return False

    def _formatValueToSpec(self, value, formatSpec):
        '''Calculate value using "%.nf" or "%.nw" formatSpec'''
        formatSpec = '{'+formatSpec+'}'
        formatSpec = formatSpec.replace('%',':')
        if formatSpec.find('w') > 0:
            formatSpec = formatSpec.replace('w','f')
            numDig = formatSpec.find(":.")
            if numDig != -1:
                numDig = numDig+2
                charList = list(formatSpec)
                digits = int(charList[numDig])
                value = round(value,digits)
                strValue = formatSpec.format(value)
                strValueList = list(strValue)
                while strValueList[-1] == '0':
                    strValueList.pop()
                if strValueList[-1] == '.':
                    strValueList.pop()
                return ''.join(strValueList)
        else:
            return formatSpec.format(value)

#
# The command must be "registered" with a unique name by calling its class.
Gui.addCommand('TechDraw_AxoLengthDimension', CommandAxoLengthDimension())