class_name MeetSpookMob extends Node3D
## Mob spawned and controlled by a meet-spook event

enum State { WAITING, FREEZE, MOVING }

const RAY_MASK := 0b00000101
const BASE_SPEED := 6.0

@export var source: MeetSpook
@export var target: Node3D
@export var freeze_time: float
@export var lifespan: float

var state := State.WAITING

@onready var camera := get_viewport().get_camera_3d()


func activate() -> void:
	print_debug(self, " spotted!")
	state = State.FREEZE
	get_tree().create_timer(freeze_time).timeout.connect(_unfreeze)
	get_tree().create_timer(lifespan).timeout.connect(destroy)
	source.resolve()


func is_active() -> bool:
	return state != State.WAITING


func move_toward_target(delta: float) -> void:
	# Should probably be overridden by implementations
	global_position = global_position.move_toward(target.global_position, BASE_SPEED * delta)


func _unfreeze() -> void:
	state = State.MOVING


func _physics_process(delta: float) -> void:
	match state:
		State.WAITING:
			# Not yet seen by the player
			if camera.is_position_in_frustum(global_position):
				var query := PhysicsRayQueryParameters3D.create(
					camera.global_position, global_position, RAY_MASK
				)
				# TODO exceptions should include this mob's collision body
				var raycast := get_world_3d().direct_space_state.intersect_ray(query)
				if not raycast:
					# Player has line-of-sight!
					activate()
		State.FREEZE:
			# Just stand there for a sec
			pass
		State.MOVING:
			move_toward_target(delta)


func destroy() -> void:
	print_debug("Destroying ", self)
	queue_free()