class_name Powerup
extends Area2D
## 掉落道具：缓慢下落 + 左右摇摆 + 缓慢自转，玩家接触即收集。
## kind: Kind.POWER 火力升级 / Kind.BOMB 炸弹+1

enum Kind { POWER, BOMB }

const FALL_SPEED := 105.0
const SWAY_AMP := 26.0
const TEX_POWER := preload("res://assets/svg/powerup.svg")
const TEX_BOMB := preload("res://assets/svg/bomb_powerup.svg")

var kind := Kind.POWER

var _t := 0.0
var _base_x := 0.0
var _sprite: Sprite2D


func _ready() -> void:
	collision_layer = 16
	collision_mask = 0
	_base_x = position.x
	_sprite = Sprite2D.new()
	_sprite.texture = TEX_BOMB if kind == Kind.BOMB else TEX_POWER
	add_child(_sprite)
	var shape := CollisionShape2D.new()
	var circle := CircleShape2D.new()
	circle.radius = 15.0
	shape.shape = circle
	add_child(shape)


func _process(delta: float) -> void:
	_t += delta
	position.y += FALL_SPEED * delta
	position.x = _base_x + sin(_t * 1.9) * SWAY_AMP
	_sprite.rotation += delta * 2.4
	if position.y > 1010.0:
		queue_free()