extends Node

"""
This module sets up WebRTC peer connections.
"""

var multiplayer_url = "ws://localhost:8888"
var webrtc_ice_servers = [
	{ "urls": ["stun:stun.l.google.com:19302"] }
]

const SignallerClient = preload("signaller_client.gd")

onready var mp = WebRTCMultiplayer.new()
onready var sc = SignallerClient.new()

func _ready():
	# connect("connected", self, "connected")
	# connect("disconnected", self, "disconnected")

	# connect("offer_received", self, "offer_received")
	# connect("answer_received", self, "answer_received")
	# connect("candidate_received", self, "candidate_received")

	# connect("lobby_joined", self, "lobby_joined")
	# connect("lobby_sealed", self, "lobby_sealed")
	# connect("peer_connected", self, "peer_connected")
	# connect("peer_disconnected", self, "peer_disconnected")
	add_child(sc)

func close():
	mp.close()
	sc.close()

func connect_to_signaller():
	close()
	sc.connect_to_websocket_signaller(multiplayer_url)

func _create_peer(id):
	var peer: WebRTCPeerConnection = WebRTCPeerConnection.new()
	peer.initialize({"iceServers": webrtc_ice_servers})
	peer.connect("session_description_created", self, "_offer_created", [id])
	peer.connect("ice_candidate_created", self, "_new_ice_candidate", [id])
	mp.add_peer(peer, id)
	if id > mp.get_unique_id():
		# TODO: peer.create_offer()
		pass
	return peer

func _new_ice_candidate(mid_name, index_name, sdp_name, id):
	print("New ICE Candidate: ", mid_name, index_name, sdp_name, id)
	# TODO: send_candidate(id, mid_name, index_name, sdp_name)

func _offer_created(type, data, id):
	if not mp.has_peer(id):
		return
	print("created", type)
	mp.get_peer(id).connection.set_local_description(type, data)
	if type == "offer":
		# TODO: send_offer(id, data)
		pass
	else:
		# TODO: send_answer(id, data)
		pass

func connected(id):
	print("Connected %d" % id)
	mp.initialize(id, true)

func peer_connected(id):
	print("Peer connected %d" % id)
	_create_peer(id)

func peer_disconnected(id):
	if mp.has_peer(id):
		mp.remove_peer(id)

func offer_received(id, offer):
	print("Got offer: %d" % id)
	if mp.has_peer(id):
		mp.get_peer(id).connection.set_remote_description("offer", offer)

func answer_received(id, answer):
	print("Got answer: %d" % id)
	if mp.has_peer(id):
		mp.get_peer(id).connection.set_remote_description("answer", answer)

func candidate_received(id, mid, index, sdp):
	if mp.has_peer(id):
		mp.get_peer(id).connection.add_ice_candidate(mid, index, sdp)