extends Node


signal connexion_updated(new_state)
signal update_my_position(tick, pos, rot)
signal update_player_position(id, tick, pos, rot, extra, tickjump, velocity)
signal remove_player(id)


@export var listen_ip:String = "127.0.0.1":
	set = set_ip


func set_ip(value):
	listen_ip = value
	disconnect_server()


@export var listen_port:int = 33333:
	set = set_port


func set_port(value:int):
	listen_port = value
	disconnect_server()


@export var username:String = "":
	set = set_username


func set_username(value):
	username = value
	disconnect_server()


@export var player_position:Node3D = null :
	set = set_player_position


func set_player_position(value:Node3D):
	player_position = value


enum Connexion{
	NONE,
	ACCOUNT_REFUSED,
	CONNECTING,
	CONNECTED,
}


@export var state_connexion:Connexion = Connexion.NONE

@export var id:int = 0:
	get:
		return id
	set(value):
		id = value


var enet:ENetConnection
var dataEnet:ENetPacketPeer 
var errorEnet:Error


func get_id() -> int:
	return id


func is_offline() -> bool:
	return state_connexion != Connexion.CONNECTED


func update_state(value):
	state_connexion = value
	connexion_updated.emit(state_connexion)


func disconnect_server():
	update_state(Connexion.NONE)


func create_server_enet():
	print("------ create_server_enet")
	enet = ENetConnection.new()
	errorEnet = enet.create_host(10)
	if errorEnet != OK:
		print("ERROR ENET.create_host: ", errorEnet)
		return


func connect_to_host():
	print("Connect to : " + listen_ip + " : " + str(listen_port))
	dataEnet = enet.connect_to_host(listen_ip, listen_port, 10)
	print(dataEnet)
	if not dataEnet:
		print("ERROR dataEnet == null: ")
		return
	elif not dataEnet.is_active():
		print("ERROR enet.connect_to_host: ", dataEnet.is_active())
		return
	update_state(Connexion.CONNECTING)


func connect_server():
	if username == "":
		return
	if player_position == null:
		return
	create_server_enet()
	connect_to_host()


func _ready():
	print("------ Multi initialized")
	update_state(Connexion.NONE)


func bad_account():
	set_username("")
	update_state(Connexion.ACCOUNT_REFUSED)


func get_event_received():
	var data:PackedFlowPull = PackedFlowPull.new(dataEnet)
	var command = data.get_u8()
	
	#var data = dataEnet.get_packet()
	#print("get: ", data)
	if command == 1: # Return connexion
		var state = data.get_u8()
		if state == 0: # OK
			id = data.get_u64()
			var x:float = data.get_f64()
			var y:float = data.get_f64()
			var z:float = data.get_f64()
			var rx:float = data.get_f64()
			var ry:float = data.get_f64()
			var rz:float = data.get_f64()
			var tick:int = data.get_u8()
			#for i in range(56,74):
			#	var tick1:int = data.decode_u8(2+i)
			#	print("tick ", i, " :", tick1)
			Global.msg_info("ME - id:%d tick:%d x:%d y:%d z:%d", [id, tick, x, y, z])
			update_my_position.emit(tick, Vector3(x, y, z), Vector3(rx, ry, rz))
			#self.set_player_position(Vector3(x, y, z))
			update_state(Connexion.CONNECTED)
		else: # KO
			bad_account()
	elif command == 3: # Get position
		if id == 0:
			return
		var nb:int = data.get_u8()
		for i in nb:
			var mid:int = data.get_u64()
			var mx:float = data.get_f64()
			var my:float = data.get_f64()
			var mz:float = data.get_f64()
			var rx:float = data.get_f64()
			var ry:float = data.get_f64()
			var rz:float = data.get_f64()
			var tick:int = data.get_u8()
			var extra:int = data.get_u8()
			var vx:float
			var vy:float
			var vz:float
			var tickjump:int 
			var jump:bool = (extra & 1) == 1
			if jump:
				tickjump = data.get_u8()
				vx = data.get_f64()
				vy = data.get_f64()
				vz = data.get_f64()
				
			#for ii in range(56,74):
			#	var tick1:int = data.decode_u8(pos+ii)
			#	print("tick ", ii, " :", tick1)
			if mid == id:
				#print("Me id:", mid, " x:", mx, " y:", my, " z:", mz)
				continue
			Global.msg_info("OTHER - id:%d tick:%d mx:%d my:%d mz:%d rx:%d ry:%d rz:%d tickjump:%d vx:%d vy:%d vz:%d", [mid, tick, mx, my ,mz ,rx, ry ,rz, tickjump, vx, vy ,vz])
			#print(" id:", mid, " tick:", tick, " x:", mx, " y:", my, " z:", mz, " rx:", rx, " ry:", ry, " rz:", rz, " tickjump:", tickjump, " vx:", vx, " vy:", vy, " vz:", vz)
			update_player_position.emit(mid, tick, Vector3(mx, my, mz), Vector3(rx, ry, rz), extra, tickjump, Vector3(vx, vy, vz))
		var nbuserremove:int = data.get_u8()
		for i in nbuserremove:
			var mid = data.get_u64()
			if mid == id:
				Global.msg_info("Try to remove me : %d", [mid])
				continue
			remove_player.emit(mid)


func send_account():
	var data:PackedByteArray = PackedByteArray()
	
	data.append(1)
	data.append(len(username))
	var packed_array = username.to_ascii_buffer()
	data += packed_array

	Global.msg_debug("%s -> size:%s / %d ", [ username, data.size(), len(username)] )
	errorEnet = dataEnet.send(1, data, 1)
	if errorEnet != OK:
		print("ERROR ENET: ", errorEnet)
		return


func get_player_position():
	if state_connexion != Connexion.CONNECTED:
		return
	var data:PackedFlowPush = PackedFlowPush.new()
	var posRaw:Vector3 = player_position.get_my_position() #get_position()
	var rotRaw:Vector3 = player_position.get_my_rotation()
	data.put_vector3(posRaw)
	data.put_vector3(rotRaw)
	if player_position.is_jump():
		Global.msg_debug("Jump Jump", [])
		data.put_u8(1)
		data.put_u8(player_position.get_tickjump())
		data.put_vector3(player_position.get_jump())
	else:
		data.put_u8(0)
	errorEnet = data.push(dataEnet, 2, 1)
	if errorEnet == ERR_UNCONFIGURED:
		update_state(Connexion.NONE)
	elif errorEnet != OK:
		Global.msg_error("ERROR ENET: %s", [str(errorEnet)])
		return


func _process(_delta):
	if state_connexion == Connexion.ACCOUNT_REFUSED:
		return
	elif state_connexion == Connexion.NONE:
		connect_server()
		return
	get_player_position()
	if state_connexion == Connexion.CONNECTING:
		send_account()
	if dataEnet.get_state() == ENetPacketPeer.STATE_CONNECTED:
		var event = enet.service()
		if event[0] == ENetConnection.EVENT_RECEIVE:
			get_event_received()
	elif dataEnet.get_state() == ENetPacketPeer.STATE_CONNECTING:
		var event = enet.service()
		if event[0] == ENetConnection.EVENT_RECEIVE:
			pass
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_DISCONNECTED:
		var _event = enet.service()
		print("STATE_DISCONNECTED")
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_ACKNOWLEDGING_CONNECT:
		var _event = enet.service()
		print("STATE_ACKNOWLEDGING_CONNECT")
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_CONNECTION_PENDING:
		var _event = enet.service()
		print("STATE_CONNECTION_PENDING")
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_CONNECTION_SUCCEEDED:
		var _event = enet.service()
		print("STATE_CONNECTION_SUCCEEDED")
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_DISCONNECT_LATER:
		var _event = enet.service()
		print("STATE_DISCONNECT_LATER")
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_DISCONNECTING:
		var _event = enet.service()
		print("STATE_DISCONNECTING")
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_ACKNOWLEDGING_DISCONNECT:
		var _event = enet.service()
		print("STATE_ACKNOWLEDGING_DISCONNECT")
	elif dataEnet.get_state() ==  ENetPacketPeer.STATE_ZOMBIE:
		var _event = enet.service()
		print("STATE_ZOMBIE")
	else:
		var _event = enet.service()
		print("STATE_UNKNOWN")