extends SceneTree
## One client process for the 2-player multiplayer test
## (scripts/run_multiplayer_2p_test.sh). Two real OS processes = real network.
##
##   godot --headless --path . --script res://scripts/mp_test_client.gd -- --role a --port 7777
##
## role "a": moves forward for ~2 s, then prints
##           RESULT a remotes=<n> moved=<bool>  and exits 0 iff it both moved
##           and saw >=1 remote player.
## role "b": connects, holds still for ~4 s, prints  RESULT b connected  exits 0.

var role := "b"
var port := 7777


func _initialize() -> void:
	var args := OS.get_cmdline_user_args()
	for i in args.size():
		if args[i] == "--role" and i + 1 < args.size():
			role = args[i + 1]
		elif args[i] == "--port" and i + 1 < args.size():
			port = int(args[i + 1])
	_run()


func _run() -> void:
	await process_frame
	var net := NetworkClient.new()
	root.add_child(net)
	var ok: bool = await net.connect_to_server("127.0.0.1", port)
	if not ok:
		print("RESULT %s connect_failed" % role)
		quit(1)
		return
	for i in 15:
		await process_frame

	if role == "b":
		# Hold still and stay connected long enough for A to boot, connect,
		# and observe us (A's Godot startup alone is a couple of seconds).
		print("RESULT b connected")
		for i in 1200:
			await process_frame
		net.disconnect_from_server()
		quit(0)
		return

	# role a: move forward, watch for a remote and our own displacement, and
	# confirm the server keeps us on the ground (not falling through it).
	var start: Vector3 = net.position
	var max_remotes := 0
	var min_server_y := 1000.0
	for i in 90:
		net.predict_and_send(1.0 / 30.0, 0.0, -1.0, false, 0.0)
		await process_frame
		max_remotes = maxi(max_remotes, net.get_remote_states().size())
		var st: Dictionary = net.get_own_server_state()
		if st.has("position"):
			min_server_y = minf(min_server_y, st["position"].y)
	var moved: bool = net.position.distance_to(start) > 1.0
	var on_floor: bool = min_server_y > -2.0
	print("RESULT a remotes=%d moved=%s on_floor=%s (min_y=%.2f)" % [max_remotes, str(moved), str(on_floor), min_server_y])
	net.disconnect_from_server()
	quit(0 if (moved and max_remotes >= 1 and on_floor) else 1)