import bpy
import sympy as sp

from ... import contracts as ct
from ... import sockets
from .. import base

class PhysicalUnitSystemNode(base.MaxwellSimNode):
	node_type = ct.NodeType.UnitSystem
	bl_label = "Unit System"
	
	input_sockets = {
		"Unit System": sockets.PhysicalUnitSystemSocketDef(
			show_by_default=True,
		),
	}
	output_sockets = {
		"Unit System": sockets.PhysicalUnitSystemSocketDef(),
	}
	
	####################
	# - Callbacks
	####################
	@base.computes_output_socket(
		"Unit System",
		input_sockets = {"Unit System"},
	)
	def compute_value(self, input_sockets) -> dict:
		return input_sockets["Unit System"]



####################
# - Blender Registration
####################
BL_REGISTER = [
	PhysicalUnitSystemNode,
]
BL_NODES = {
	ct.NodeType.UnitSystem: (
		ct.NodeCategory.MAXWELLSIM_INPUTS
	)
}