class_name DeckNode

var name: String
var input_ports: Array[Port]
var output_ports: Array[Port]
var outgoing_connections: Dictionary
var incoming_connections: Dictionary

var ports: Array[Port]

var _belonging_to: Deck
var _id: String
var node_type: String

var description: String
var aliases: Array[String]

var props_to_serialize: Array[StringName]

enum PortType{
	INPUT, ## Input port type (slot on the left).
	OUTPUT, ## Output port type (slot on the right).
	VIRTUAL, ## Virtual port type (no slot on left [i]or[/i] right).
}


func add_input_port(type: Deck.Types, label: String, descriptor: String = "") -> void:
	var port := Port.new(type, label, ports.size(), PortType.INPUT, get_input_ports().size(), descriptor)
	ports.append(port)


func add_output_port(type: Deck.Types, label: String, descriptor: String = "") -> void:
	var port := Port.new(type, label, ports.size(), PortType.OUTPUT, get_output_ports().size(), descriptor)
	ports.append(port)


func add_virtual_port(type: Deck.Types, label: String, descriptor: String = "") -> void:
	var port := Port.new(type, label, ports.size(), PortType.VIRTUAL, get_virtual_ports().size(), descriptor)
	ports.append(port)


func send_from_output_port(output_port: int, data: DeckType, extra_data: Array = []) -> void:
	var global_port := get_global_port_idx_from_output(output_port)
	if global_port == -1:
		return

	send(global_port, data, extra_data)


func send(from_port: int, data: DeckType, extra_data: Array = []) -> void:
	if outgoing_connections.get(from_port) == null:
		return

	for connection in outgoing_connections[from_port]:
		connection = connection as Dictionary
		# key is node uuid
		# value is input port on destination node
		for node in connection:
			get_node(node)._receive(connection[node], data, extra_data)


func _receive(to_port: int, data: DeckType, extra_data: Array = []) -> void:
	pass


func add_outgoing_connection_to_port(output_port: int, to_node: String, to_input_port: int) -> void:
	add_outgoing_connection(
		get_global_port_idx_from_output(output_port),
		to_node,
		get_node(to_node).get_global_port_idx_from_input(to_input_port)
		)


func add_outgoing_connection(from_port: int, to_node: String, to_port: int) -> void:
	var port_connections: Array = outgoing_connections.get(from_port, [])
	port_connections.append({to_node: to_port})
	outgoing_connections[from_port] = port_connections
	get_node(to_node).add_incoming_connection(to_port, _id, from_port)


func add_incoming_connection(to_port: int, from_node: String, from_port: int) -> void:
	var connection := {from_node: from_port}
	incoming_connections[to_port] = connection


func request_value(on_port: int) -> Variant:
	if !incoming_connections.has(on_port):
		return null

	var connection: Dictionary = incoming_connections[on_port]
	var node := get_node(connection.keys()[0])
	return node._value_request(connection.values()[0])


# override this
func _value_request(from_port: int) -> Variant:
	return null


func remove_outgoing_connection(from_port: int, connection_hash: int) -> void:
	var port_connections: Array = (outgoing_connections.get(from_port, []) as Array).duplicate(true)
	if port_connections.is_empty():
		return

	var to_remove: int = -1
	for i in port_connections.size():
		if port_connections[i].hash() == connection_hash:
			to_remove = i

	if to_remove == -1:
		return

	port_connections.remove_at(to_remove)
	outgoing_connections[from_port] = port_connections


func remove_outgoing_connection_from_port(output_port: int, connection_hash: int) -> void:
	remove_outgoing_connection(get_global_port_idx_from_output(output_port), connection_hash)


func get_input_ports() -> Array[Port]:
	return ports.filter(
		func(port: Port) -> bool:
			return port.port_type == PortType.INPUT
	)


func get_output_ports() -> Array[Port]:
	return ports.filter(
		func(port: Port) -> bool:
			return port.port_type == PortType.OUTPUT
	)


func get_virtual_ports() -> Array[Port]:
	return ports.filter(
		func(port: Port) -> bool:
			return port.port_type == PortType.VIRTUAL
	)


func get_global_port_idx_from_input(idx: int) -> int:
	if get_input_ports().size() > idx:
		return get_input_ports()[idx].index
	else:
		return -1


func get_global_port_idx_from_output(idx: int) -> int:
	if get_output_ports().size() > idx:
		return get_output_ports()[idx].index
	else:
		return -1


func get_global_port_idx_from_virtual(idx: int) -> int:
	if get_virtual_ports().size() > idx:
		return get_virtual_ports()[idx].index
	else:
		return -1


func get_all_ports() -> Array[Port]:
	return ports


func get_node(uuid: String) -> DeckNode:
	return _belonging_to.get_node(uuid)


func to_dict(with_meta: bool = true) -> Dictionary:
	var d := {
		"_id": _id,
		"name": name,
		"outgoing_connections": outgoing_connections,
		"incoming_connections": incoming_connections,
		"props": {},
		"node_type": node_type,
		"port_values": []
	}

	for prop in props_to_serialize:
		d.props[prop] = get(prop)

	ports.map(
		func(port: Port) -> void:
			d.port_values.append(port.value)
	)

	if with_meta:
		d["meta"] = {}
		for meta in get_meta_list():
			d["meta"][meta] = get_meta(meta)
	return d