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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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from ast import literal_eval

import bpy
from bpy.props import BoolProperty, StringProperty
from sverchok.node_tree import SverchCustomTreeNode
from sverchok.data_structure import changable_sockets, updateNode

from sverchok.utils.listutils import preobrazovatel


class ListLevelsNode(bpy.types.Node, SverchCustomTreeNode):
    ''' Lists Levels node '''
    bl_idname = 'ListLevelsNode'
    bl_label = 'List Del Levels'
    bl_icon = 'OUTLINER_OB_EMPTY'
    sv_icon = 'SV_LIST_DEL_LEVELS'

    typ: StringProperty(name='typ', default='')
    newsock: BoolProperty(name='newsock', default=False)

    Sverch_LisLev: StringProperty(
        name='Sverch_LisLev', description='User defined nesty levels. (i.e. 1,2)',
        default='1,2,3', update=updateNode)

    def sv_init(self, context):
        self.inputs.new('SvStringsSocket', 'data')
        self.outputs.new('SvStringsSocket', 'data')

    def draw_buttons(self, context, layout):
        layout.prop(self, "Sverch_LisLev", text="List levels")

    def update(self):
        if 'data' in self.inputs and len(self.inputs['data'].links) > 0:
            inputsocketname = 'data'
            outputsocketname = ['data', ]
            changable_sockets(self, inputsocketname, outputsocketname)

    def process(self):
        if self.outputs['data'].is_linked:
            data = self.inputs['data'].sv_get()
            userlevelb = literal_eval('['+self.Sverch_LisLev+']')
            self.outputs['data'].sv_set(preobrazovatel(data, userlevelb))


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


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