extends Area2D

signal destroyed

@export var speed: float = 140.0
@export var acceleration: float = 260.0
@export var rotation_speed: float = 6.0
@export var max_hp: int = 3

var velocity: Vector2 = Vector2.ZERO
var hp: int

@onready var fleet: Node2D = get_node("../Fleet")



func _ready() -> void:
	hp = max_hp
	add_to_group("enemies")
	queue_redraw()


func _physics_process(delta: float) -> void:
	var target_pos: Vector2 = _nearest_ship_position()
	var to_target: Vector2 = target_pos - position

	if to_target.length() > 1.0:
		var desired_velocity: Vector2 = to_target.normalized() * speed
		velocity = velocity.move_toward(desired_velocity, acceleration * delta)
		position += velocity * delta

	if velocity.length() > 5.0:
		var target_angle: float = velocity.angle() + PI / 2.0
		rotation = lerp_angle(rotation, target_angle, rotation_speed * delta)


func _nearest_ship_position() -> Vector2:
	if fleet.ships.is_empty():
		return position

	var nearest: Node2D = fleet.ships[0]
	var best_dist: float = position.distance_to(nearest.position)
	for ship in fleet.ships:
		var d: float = position.distance_to(ship.position)
		if d < best_dist:
			best_dist = d
			nearest = ship
	return nearest.position


func take_damage(amount: int) -> void:
	hp -= amount
	if hp <= 0:
		EnemyExplosionVFX.spawn(get_tree().root, position)
		destroyed.emit()
		queue_free()


func _draw() -> void:
	var points: PackedVector2Array = PackedVector2Array([
		Vector2(0, -16), Vector2(12, 0), Vector2(0, 16), Vector2(-12, 0)
	])
	# Constant glow - see Ship.gd. Nothing animates, so no per-frame redraw.
	NeonDraw.draw_glowing_polygon(self, points, Color(1.0, 0.15, 0.2), 1.0)