# This file is part of sunder.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
class_name Network extends Node

## The maximum number of concurrent connections to accept
@export_range(1, 4095) var max_peers:int = 32

## Emitted when a [MultiplayerPeer] sends a [member leave] rpc, right before it is disconnected
signal peer_disconnecting(peer_id:int)

## Creates a server peer and listens for connections on all intefaces for specifed [param port]
func serve(port:int = 9000) -> void:
	var peer:ENetMultiplayerPeer = ENetMultiplayerPeer.new()
	var err:Error = peer.create_server(port, max_peers)
	if err != Error.OK:
		Game.change_scene(Game.GameType.NONE)
		return
	multiplayer.peer_connected.connect(_on_peer_connected)
	multiplayer.peer_disconnected.connect(_on_peer_disconnected)
	multiplayer.multiplayer_peer = peer
	print("listening for connections on *:%s" % port)

## Creates a client peer and connects to specified [param host] and [param port]
func join(host:String = "localhost", port:int = 9000) -> void:
	var peer := ENetMultiplayerPeer.new()
	peer.create_client(host, port)
	multiplayer.multiplayer_peer = peer

#@rpc("any_peer", "call_remote", "reliable")
#func leave() -> void:
	#if multiplayer.is_server():
		#var peer_id:int = multiplayer.get_remote_sender_id()
		#peer_disconnecting.emit(peer_id)
		#multiplayer.disconnect_peer(peer_id)

## Emitted when a multiplayer peer successfully connects to a server. Only emitted on the server.
func _on_peer_connected(peer_id: int) -> void:
	print("peer `%d` connected" % peer_id)

func _on_peer_disconnected(peer_id:int) -> void:
	print("peer `%d` disconnected" % peer_id)