extends GraphEdit

const NODE_SCENE := preload("res://graph_node_renderer/deck_node_renderer_graph_node.tscn")

var deck: Deck = Deck.new()
var button_node = preload("res://classes/deck/nodes/button.gd")
var print_node = preload("res://classes/deck/nodes/print.gd")
var get_var_node = preload("res://classes/deck/nodes/get_deck_var.gd")
var set_var_node = preload("res://classes/deck/nodes/set_deck_var.gd")

func _ready() -> void:
	var add_button := Button.new()
	add_button.text = "Button"
	var add_print := Button.new()
	add_print.text = "Print"
	var get_var := Button.new()
	get_var.text = "Get Var"
	var set_var := Button.new()
	set_var.text = "Set Var"
	get_zoom_hbox().add_child(add_button)
	get_zoom_hbox().add_child(add_print)
	get_zoom_hbox().add_child(get_var)
	get_zoom_hbox().add_child(set_var)

	add_button.pressed.connect(
		func():
			var node := deck.add_node(button_node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	add_print.pressed.connect(
		func():
			var node := deck.add_node(print_node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	get_var.pressed.connect(
		func():
			var node := deck.add_node(get_var_node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	set_var.pressed.connect(
		func():
			var node := deck.add_node(set_var_node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	connection_request.connect(attempt_connection)
	disconnection_request.connect(attempt_disconnect)


func attempt_connection(from_node_name: StringName, from_port: int, to_node_name: StringName, to_port: int) -> void:
	var from_node: DeckNode = get_node(NodePath(from_node_name)).node
	var to_node: DeckNode = get_node(NodePath(to_node_name)).node

	var from_output := from_node.get_global_port_idx_from_output(from_port)
	var to_input := to_node.get_global_port_idx_from_input(to_port)

	if deck.connect_nodes(from_node, to_node, from_output, to_input):
		connect_node(from_node_name, from_port, to_node_name, to_port)


func attempt_disconnect(from_node_name: StringName, from_port: int, to_node_name: StringName, to_port: int) -> void:
	var from_node: DeckNode = get_node(NodePath(from_node_name)).node
	var to_node: DeckNode = get_node(NodePath(to_node_name)).node

	var from_output := from_node.get_global_port_idx_from_output(from_port)
	var to_input := to_node.get_global_port_idx_from_input(to_port)

	deck.disconnect_nodes(from_node, to_node, from_output, to_input)

	disconnect_node(from_node_name, from_port, to_node_name, to_port)