class_name VisibilityComponent
extends Node

@export var health: HealthComponent
@export var hud: HUDComponent
@export var hud_distance: float
@export var physics_distance: float
@export var render_distance: float

var parent: Node3D
var main_player_distance_sq: float

func _ready():
	parent = owner
	hud_distance *= hud_distance
	physics_distance *= physics_distance
	render_distance *= render_distance
	update_visibility()

func _process(_delta):
	if hud.visible:
		hud.transparency = 1.0 - (hud_distance - main_player_distance_sq) * 0.001

func update_visibility():
	if !Global.player:
		return
	
	if !health.is_alive:
		return
	
	main_player_distance_sq = parent.global_position.distance_squared_to(Global.player.global_position)
	parent.visible = main_player_distance_sq < render_distance
	hud.visible = main_player_distance_sq < hud_distance
	DeathComponent.set_physics(parent, main_player_distance_sq < physics_distance)