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#
#  This program is free software; you can redistribute it and/or
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#  as published by the Free Software Foundation; either version 2
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#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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import math

from mathutils import Vector, Matrix

import bpy
from bpy.props import BoolProperty

from sverchok.node_tree import SverchCustomTreeNode
from sverchok.data_structure import updateNode

from sverchok.utils.modules.polygon_utils import areas_from_polygons



class SvAreaNode(bpy.types.Node, SverchCustomTreeNode):
    ''' Area '''
    bl_idname = 'SvAreaNode'
    bl_label = 'Area'
    bl_icon = 'OUTLINER_OB_EMPTY'
    sv_icon = 'SV_AREA'

    sum_faces: BoolProperty(name='sum faces', default=False, update=updateNode)

    def sv_init(self, context):
        self.inputs.new('SvVerticesSocket', "Vertices")
        self.inputs.new('SvStringsSocket', "Polygons")
        self.outputs.new('SvStringsSocket', "Area")

    def draw_buttons(self, context, layout):
        layout.prop(self, "sum_faces", text="Sum Faces")

    def process(self):
        inputs = self.inputs
        Vertices = inputs["Vertices"].sv_get()
        Polygons = inputs["Polygons"].sv_get()

        outputs = self.outputs
        if not outputs['Area'].is_linked or not all([Vertices, Polygons]):
            return

        # no smart auto extending here.
        areas = []
        for verts, faces in zip(Vertices, Polygons):
            areas.append(areas_from_polygons(verts, faces, sum_faces=self.sum_faces))
        
        outputs['Area'].sv_set(areas)


def register():
    bpy.utils.register_class(SvAreaNode)


def unregister():
    bpy.utils.unregister_class(SvAreaNode)
