extends SceneTree

## Verifies the out-of-bounds contract on a real map, in a real match:
##
##   1. leaving the play volume registers the player and starts the countdown
##   2. the warning UI appears, with a timer
##   3. the red overlay deepens as the timer runs down
##   4. the timer is FIVE seconds
##   5. reaching zero kills the player
##   6. coming back inside before zero cancels it
##
##     godot --path . --windowed --resolution 800x600 \
##         -s res://debug/out_of_bounds_test.gd
##
## It runs windowed rather than headless because the overlay is a real Control
## and the check on its alpha is the only way to know the screen actually reds
## out rather than merely that a number is counting down somewhere.

## Defaults to Sakura Crossing; pass a scene path to check another map, e.g.
##     -s res://debug/out_of_bounds_test.gd -- res://scenes/maps/neon_alley/neon_alley.tscn
var MAP := "res://scenes/maps/sakura_crossing/sakura_crossing.tscn"
## How far outside to teleport. Must clear the widest play volume in the game —
## Neon Alley's is 666 m across.
const FAR := 2000.0

var _frames := 0
var _fails := 0
var _phase := "boot"
var _player: Node3D = null
var _area: CombatArea = null
var _alpha_early := -1.0
var _alpha_late := -1.0
var _t_start := 0.0


## By TYPE, not by node name — the overlay is created in code and its name is
## whatever Godot assigns.
func _ui_layer() -> CanvasLayer:
	if _area == null:
		return null
	for c in _area.get_children():
		if c is CanvasLayer:
			return c
	return null


func _check(ok: bool, msg: String) -> void:
	if ok:
		print("  OK: ", msg)
	else:
		_fails += 1
		print("  FAIL: ", msg)


func _initialize() -> void:
	var args := OS.get_cmdline_user_args()
	if args.size() > 0:
		MAP = args[0]
	print("OOB: testing ", MAP)
	change_scene_to_file("res://ui/main_menu/main_menu.tscn")


func _find() -> bool:
	if current_scene == null:
		return false
	var areas := current_scene.find_children("*", "Area3D", true, false)
	for a in areas:
		if a is CombatArea:
			_area = a
	for p in current_scene.find_children("*", "CharacterBody3D", true, false):
		if str(p.name).is_valid_int():
			_player = p
	return _area != null and _player != null


func _process(delta: float) -> bool:
	_frames += 1
	match _phase:
		"boot":
			if _frames == 60:
				var nm = root.get_node_or_null("NetworkManager")
				if nm and nm.has_method("start_singleplayer_match"):
					nm.start_singleplayer_match(GameMode.DEATHMATCH)
				change_scene_to_file(MAP)
				_phase = "settle"
		"settle":
			if _frames > 200:
				if not _find():
					print("OOB: could not find CombatArea or player")
					_fails += 1
					return _done()
				_check(true, "map has a CombatArea and a player")
				# Sideways, not upward. Teleporting straight up puts the player
				# back INSIDE the volume a few seconds later as they fall, which
				# cancels the countdown and makes the test look like a bug in
				# the countdown. Far out on X they stay outside however far they
				# drop — which is also the real case being tested.
				_player.global_position = Vector3(FAR, 30, 0)
				var mp := _area.multiplayer
				print("OOB: peer=%s uid=%d authority=%d is_server=%s" % [
					mp.has_multiplayer_peer(), mp.get_unique_id(),
					_player.get_multiplayer_authority(), mp.is_server()])
				_phase = "left"
				_t_start = 0.0
		"left":
			_t_start += delta
			if _t_start > 0.4:
				_check(_area.out_of_bounds_players.has(_player),
					"leaving the volume registers the player")
				var t: float = 0.0
				if _area.out_of_bounds_players.has(_player):
					t = _area.out_of_bounds_players[_player].time_left
				_check(t > 4.0 and t <= 5.0,
					"countdown starts at five seconds (%.2f left after %.1fs)" % [t, _t_start])
				var lay := _ui_layer()
				_check(lay != null and lay.visible, "warning UI is on screen")
				if lay:
					for c in lay.get_children():
						if c is Label:
							_check(c.text.contains("WARNING"),
								"warning text reads '%s'" % c.text.split("\n")[0])
						if c is ColorRect:
							_alpha_early = c.color.a
				_phase = "reddening"
		"reddening":
			_t_start += delta
			if _t_start > 3.6:
				var lay := _ui_layer()
				if lay:
					for c in lay.get_children():
						if c is ColorRect:
							_alpha_late = c.color.a
				_check(_alpha_late > _alpha_early,
					"screen reddens as the timer runs down (%.2f -> %.2f)"
						% [_alpha_early, _alpha_late])
				_phase = "dying"
		"dying":
			_t_start += delta
			if _t_start > 6.5:
				var dead: bool = "is_dead" in _player and _player.is_dead
				var hurt: bool = "health" in _player and float(_player.health) <= 0.0
				_check(dead or hurt,
					"player is killed by the environment at zero (dead=%s)" % dead)
				_check(not _area.out_of_bounds_players.has(_player),
					"player is dropped from the countdown once dead")
				return _done()
	return false


func _done() -> bool:
	print("=== OUT OF BOUNDS: %s ===" %
		("ALL PASSED" if _fails == 0 else "%d FAILED" % _fails))
	return true