extends SceneTree
var detonation_time := -1
func _initialize() -> void:
	call_deferred("run_test")
func run_test() -> void:
	var world := Node3D.new()
	root.add_child(world)
	var room := Node3D.new()
	room.set_script(load("res://scripts/room.gd"))
	world.add_child(room)
	var player := CharacterBody3D.new()
	player.set_script(load("res://scripts/player.gd"))
	player.position = Vector3(0, 0.1, 4)
	world.add_child(player)
	player.hp = 10000
	Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
	await physics_frame
	var grenade: RigidBody3D = player.throw_grenade()
	assert(grenade != null)
	assert(player.throw_grenade() == null)
	assert(is_equal_approx(player.grenade_cooldown, 15))
	assert(grenade.physics_material_override.bounce > 0)
	grenade.detonated.connect(func(): detonation_time = Time.get_ticks_msec())
	var started := Time.get_ticks_msec()
	var start := grenade.position
	await create_timer(0.5).timeout
	assert(grenade.position.distance_to(start) > 1)
	assert(grenade.linear_velocity.y < 3)
	var targets: Array[Node3D] = []
	for pos in [Vector3(0, 0, -2), Vector3(2, 0, 0), Vector3(0, 0, -7)]:
		var target := Node3D.new()
		target.set_script(load("res://tools/grenade_test_target.gd"))
		target.position = pos
		world.add_child(target)
		targets.append(target)
	var wall := StaticBody3D.new()
	wall.position = Vector3(1, 1.5, 0)
	var shape := CollisionShape3D.new()
	var box := BoxShape3D.new()
	box.size = Vector3(0.2, 3, 2)
	shape.shape = box
	wall.add_child(shape)
	world.add_child(wall)
	# Isolate explosion coverage from the projectile's random rotation/bounces.
	grenade.freeze = true
	grenade.global_position = Vector3(0, 0.3, 0)
	await create_timer(3.15).timeout
	assert(is_instance_valid(grenade) and not grenade.exploded)
	await create_timer(0.6).timeout
	assert(detonation_time >= 0)
	var seconds := (detonation_time - started) / 1000.0
	assert(seconds >= 3.8 and seconds <= 4.3)
	assert(targets[0].damage_taken > 0)
	assert(targets[1].damage_taken == 0) # behind a wall
	assert(targets[2].damage_taken == 0) # beyond blast radius
	assert(player.hp < 10000)
	assert(player.throw_grenade() == null)
	# Wait until the real cooldown expires, without changing the game timer.
	await create_timer(player.grenade_cooldown + 0.1).timeout
	assert(player.grenade_cooldown == 0)
	assert(player.throw_grenade() != null)
	var main = load("res://scripts/main.gd").new()
	assert(main.zombies_for_wave(1) == 6)
	assert(main.zombies_for_wave(2) == 8)
	assert(main.zombies_for_wave(11) == 26)
	main.free()
	print("PASS: thrown physics/gravity, 4s fuse (", seconds, "), 15s cooldown, blast LOS/range/self-damage, wave growth beyond 24")
	world.queue_free()
	await process_frame
	quit()