extends SceneTree
const Zombie = preload("res://scripts/zombie.gd")
var world: Node3D
var player: Node3D

func _initialize() -> void:
	call_deferred("run_test")

func _freeze_others(actor: Node = null) -> void:
	for zombie in get_nodes_in_group("live_zombies"):
		if zombie != actor:
			zombie.set_physics_process(false)

func run_test() -> void:
	world = load("res://scenes/main.tscn").instantiate()
	root.add_child(world)
	player = world.player
	player.set_physics_process(false)
	player.touch_mode = true
	_freeze_others()
	player.hp = 20
	player.ammo = 3
	world.hud.update_status(player, 4, 1200)
	assert(world.hud.health_value.text == "20")
	assert(world.hud.ammo_value.text == "03 / 30")
	assert(world.hud.health_value.get_theme_color("font_color") == world.hud.DANGER)
	assert(not world.hud.help.visible)
	print("PASS: HUD numeri, vita bassa, caricatore e modalita' touch")
	player.hp = 100
	player.ammo = 1
	player.shoot()
	assert(player.ammo == 0 and player.reloading)
	var release_count := 0
	for speaker in player.get_children():
		if speaker is AudioStreamPlayer and speaker.stream.resource_path.ends_with("cliprelease1.wav"):
			release_count += 1
	player.start_reload() # must not add another reload
	var repeated_count := 0
	for speaker in player.get_children():
		if speaker is AudioStreamPlayer and speaker.stream.resource_path.ends_with("cliprelease1.wav"):
			repeated_count += 1
	assert(repeated_count == release_count)
	await create_timer(1.7).timeout
	assert(player.ammo == 30 and not player.reloading)
	print("PASS: ultimo colpo avvia auto-reload e completa a 30")
	# Shared grid route: actual physics movement, not just returned waypoints.
	Engine.time_scale = 4
	var cases := [
		[Vector3(-5, 0.1, -6.5), Vector3(-5, 0.1, 0)],
		[Vector3(5, 0.1, 1.5), Vector3(5, 0.1, 7.5)],
		[Vector3(-6, 0.1, 4), Vector3(-2, 0.1, 4)],
		[Vector3(6.8, 0.1, -6), Vector3(6.8, 0.1, -2)],
	]
	player.hp = 10000
	for positions in cases:
		player.position = positions[1]
		var actor := CharacterBody3D.new()
		actor.set_script(Zombie)
		actor.player = player
		actor.navigation = world.navigation
		actor.position = positions[0]
		world.add_child(actor)
		actor.entering = false
		actor.speed = 3
		var reached := false
		for i in 420:
			_freeze_others(actor)
			await physics_frame
			var delta: Vector3 = actor.position - player.position
			delta.y = 0
			if delta.length() < 1.8:
				reached = true
				break
		assert(reached, "Zombie bloccato: %s -> %s, finale %s" % [positions[0], positions[1], actor.position])
		actor.queue_free()
		await process_frame
	print("PASS: inseguimento fisico attorno a entrambe le scrivanie, sedie e bidone")
	Engine.time_scale = 1
	# A melee ray across the left desk must not hit through it.
	player.position = Vector3(-5, 0.1, -3.2)
	var actor := CharacterBody3D.new()
	actor.set_script(Zombie)
	actor.player = player
	actor.position = Vector3(-5, 0.1, -4.8)
	world.add_child(actor)
	actor.entering = false
	actor.set_physics_process(false)
	await physics_frame
	await physics_frame
	assert(not actor._attack_clear())
	var hp_before: float = player.hp
	actor._attack()
	assert(player.hp == hp_before)
	print("PASS: nessun attacco attraverso la scrivania")
	_freeze_others()
	player.hp = 100
	player.ammo = 1
	player.shoot()
	assert(player.reloading)
	player.take_damage(1000)
	var flatlines := 0
	for speaker in player.get_children():
		if speaker is AudioStreamPlayer and speaker.stream.resource_path.ends_with("flatline.wav"):
			flatlines += 1
	assert(flatlines == 1)
	player.take_damage(10)
	flatlines = 0
	for speaker in player.get_children():
		if speaker is AudioStreamPlayer and speaker.stream.resource_path.ends_with("flatline.wav"):
			flatlines += 1
	assert(flatlines == 1)
	await create_timer(1.8).timeout
	assert(player.hp == 0 and player.ammo == 0 and not player.reloading)
	print("PASS: flatline una volta e auto-reload annullato dalla morte")
	world.queue_free()
	await process_frame
	quit()