extends Control

const DEFAULT_PORT = 8910 # some random number, pick your port properly

#### Network callbacks from SceneTree ####

# callback from SceneTree
func _player_connected(_id):
	#someone connected, start the game!
	var pong = load("res://pong.tscn").instance()
	pong.connect("game_finished", self, "_end_game", [], CONNECT_DEFERRED) # connect deferred so we can safely erase it from the callback
	
	get_tree().get_root().add_child(pong)
	hide()

func _player_disconnected(_id):

	if get_tree().is_network_server():
		_end_game("Client disconnected")
	else:
		_end_game("Server disconnected")

# callback from SceneTree, only for clients (not server)
func _connected_ok():
	# will not use this one
	pass
	
# callback from SceneTree, only for clients (not server)	
func _connected_fail():

	_set_status("Couldn't connect",false)
	
	get_tree().set_network_peer(null) #remove peer
	
	get_node("panel/join").set_disabled(false)
	get_node("panel/host").set_disabled(false)

func _server_disconnected():
	_end_game("Server disconnected")
	
##### Game creation functions ######

func _end_game(with_error=""):
	if has_node("/root/pong"):
		#erase pong scene
		get_node("/root/pong").free() # erase immediately, otherwise network might show errors (this is why we connected deferred above)
		show()
	
	get_tree().set_network_peer(null) #remove peer
	
	get_node("panel/join").set_disabled(false)
	get_node("panel/host").set_disabled(false)
	
	_set_status(with_error, false)

func _set_status(text, isok):
	#simple way to show status		
	if isok:
		get_node("panel/status_ok").set_text(text)
		get_node("panel/status_fail").set_text("")
	else:
		get_node("panel/status_ok").set_text("")
		get_node("panel/status_fail").set_text(text)

func _on_host_pressed():
	var host = NetworkedMultiplayerENet.new()
	host.set_compression_mode(NetworkedMultiplayerENet.COMPRESS_RANGE_CODER)
	var err = host.create_server(DEFAULT_PORT, 1) # max: 1 peer, since it's a 2 players game
	if err != OK:
		#is another server running?
		_set_status("Can't host, address in use.",false)
		return
		
	get_tree().set_network_peer(host)
	get_node("panel/join").set_disabled(true)
	get_node("panel/host").set_disabled(true)
	_set_status("Waiting for player..", true)

func _on_join_pressed():
	var ip = get_node("panel/address").get_text()
	if not ip.is_valid_ip_address():
		_set_status("IP address is invalid", false)
		return
	
	var host = NetworkedMultiplayerENet.new()
	host.set_compression_mode(NetworkedMultiplayerENet.COMPRESS_RANGE_CODER)
	host.create_client(ip, DEFAULT_PORT)
	get_tree().set_network_peer(host)
	
	_set_status("Connecting..", true)


### INITIALIZER ####
	
func _ready():
	# connect all the callbacks related to networking
	get_tree().connect("network_peer_connected", self, "_player_connected")
	get_tree().connect("network_peer_disconnected", self, "_player_disconnected")
	get_tree().connect("connected_to_server", self, "_connected_ok")
	get_tree().connect("connection_failed", self, "_connected_fail")
	get_tree().connect("server_disconnected", self, "_server_disconnected")