extends Node2D
## Auto-fire KINETIC hardpoint. No player input ever touches this —
## the build expresses itself while the pilot only positions. Draws its
## own range ring so the kill zone is legible (positioning <-> build bet).

const PROJECTILE := preload("res://scenes/kinetic_projectile.tscn")

@export var fire_interval := 0.4
@export var range_px := 220.0

var _cooldown := 0.0


func _physics_process(delta: float) -> void:
	_cooldown -= delta
	if _cooldown > 0.0:
		return
	var target := _nearest_enemy()
	if target == null:
		return
	_fire(target)
	_cooldown = fire_interval


func _nearest_enemy() -> Node2D:
	var best: Node2D = null
	var best_d := range_px * range_px
	for e in get_tree().get_nodes_in_group("enemies"):
		var d: float = global_position.distance_squared_to(e.global_position)
		if d < best_d:
			best_d = d
			best = e
	return best


func _fire(target: Node2D) -> void:
	var p := PROJECTILE.instantiate()
	p.direction = (target.global_position - global_position).normalized()
	p.position = global_position
	owner.get_parent().add_child(p)


func _draw() -> void:
	draw_arc(Vector2.ZERO, range_px, 0.0, TAU, 64, Color(0.55, 0.7, 0.85, 0.18), 1.0)