extends Node3D
class_name HittableEntity
## Generic enemy / boss stub with hit points.

signal defeated
signal hit(remaining_hp: int)

@export var max_hp: int = 4
@export var texture_path: String = "res://assets/sprites/placeholders/enemy.png"
@export var defeat_flag: String = ""
@export var achievement_on_defeat: String = ""

var hp: int = 4
var _alive: bool = true

@onready var _billboard: BillboardSprite = $BillboardSprite

func _ready() -> void:
	hp = max_hp
	add_to_group("enemy")
	add_to_group("interactable")
	if _billboard:
		var tex: Texture2D = load(texture_path)
		if tex:
			_billboard.set_texture(tex)

func take_hit(amount: int = 1) -> void:
	if not _alive:
		return
	hp = max(0, hp - amount)
	hit.emit(hp)
	AudioDirector.play_hit()
	if hp <= 0:
		_alive = false
		if defeat_flag != "":
			GameState.set_flag(defeat_flag, true)
		if achievement_on_defeat != "":
			Achievements.unlock(achievement_on_defeat)
		defeated.emit()
		queue_free()

func on_interact(_player: Node) -> void:
	take_hit(1)