extends StaticBody2D
## 砖块：被球撞扣血，归零销毁并发出 destroyed(points) 信号。
##
## 反馈：被击中时闪白 + 缩放抖动；血量越低颜色越亮。
## 击杀时按 power_up_drop_chance 概率额外发 power_up_dropped(位置) 信号。

signal destroyed(points: int)
signal power_up_dropped(spawn_position: Vector2)

@export var max_hp: int = 1
@export var points: int = 100
@export var power_up_drop_chance: float = 0.15  ## 击杀掉落道具的概率
@export var color_by_hp: Dictionary = {
	1: Color(0.30, 0.70, 0.40),
	2: Color(0.95, 0.75, 0.20),
	3: Color(0.85, 0.30, 0.30),
}

var _hp: int

func _ready() -> void:
	add_to_group("bricks")
	_hp = max_hp
	_refresh_color()

func hit() -> void:
	_play_hit_feedback()
	_hp -= 1
	if _hp <= 0:
		# 击杀：摇骰子决定是否掉落道具
		if randf() < power_up_drop_chance:
			power_up_dropped.emit(position)
		destroyed.emit(points)
		queue_free()
	else:
		_refresh_color()

func _play_hit_feedback() -> void:
	var rect := get_node_or_null("ColorRect") as ColorRect
	if not rect:
		return
	var original_color: Color = rect.color
	rect.color = Color(1, 1, 1)
	var tween := create_tween()
	tween.tween_property(rect, "color", original_color, 0.15)
	var original_scale: Vector2 = rect.scale
	tween.parallel().tween_property(rect, "scale", original_scale * 1.15, 0.05)
	tween.tween_property(rect, "scale", original_scale, 0.1)

func _refresh_color() -> void:
	var rect := get_node_or_null("ColorRect")
	if rect and color_by_hp.has(_hp):
		rect.color = color_by_hp[_hp]