class_name WeaponSwordProjectile
extends Node2D

@export var speed: float = 500.0
@export var range: float = 200.0
@export var target: Node2D
@export var damage_mult: float = 1.0
@export var on_hit_sig: Signal

var _direction: Vector2
var _traveled: float = 0.0
var _already_hit: Array[PhysicsBody2D] = []


func _ready() -> void:
	_direction = global_position.direction_to(target.global_position).normalized()
	_traveled = 0.0
	rotation = _direction.angle()
	if _direction.x < 0:
		rotation += PI
	var proj_manager = get_tree().get_first_node_in_group(GlobalConst.GROUP_PROJ_MANAGER)
	if not proj_manager:
		return
	reparent(proj_manager, true)


func _physics_process(delta: float) -> void:
	var step = _direction * speed * delta
	global_position += step
	_traveled += step.length()

	if _traveled >= range:
		queue_free()


func _on_area_2d_body_entered(body: Node2D) -> void:
	if body in _already_hit:
		return
	on_hit_sig.emit(self, body, damage_mult)
	_already_hit.append(body)