extends Node3D
class_name Buff

@onready var character = (get_owner() as Character)
@onready var status = (%Status as Status)

class BuffInfo:
	var name : String
	var duration : float

var buff_map = {} #命中信息

func _process(delta):
	for buff_name in buff_map:
		var buff_info = buff_map[buff_name]
		if buff_info.duration == -1:
			trigger_buff_effect(buff_info.name,"update")
		else:
			buff_info.duration -= delta
			if buff_info.duration <= 0:
				trigger_buff_effect(buff_info.name,"end")
				buff_map.erase(buff_name)
			else:
				trigger_buff_effect(buff_info.name,"update")

func trigger_buff_effect(buff_name:String,trigger_name:String):
	var function_name = "on_%s_%s" % [trigger_name,buff_name]
	if has_method(function_name):
		call(function_name)

func has_buff(buff_name:String) -> bool:
	return buff_name in buff_map
	
func add_buff(buff_name:String,duration:float):
	if buff_name in buff_map:
		buff_map[buff_name].duration = duration
	else:
		var new_buff = BuffInfo.new()
		new_buff.name = buff_name
		new_buff.duration = duration
		buff_map[buff_name] = new_buff
	trigger_buff_effect(buff_name,"start")
		
#==具体实现==
func on_end_hit_back():status.hit_back_speed = 0
func on_end_hit_up():status.hit_up_speed = 0
func on_start_stagger():status.is_stagger = true
func on_end_stagger():status.is_stagger = false
func on_end_stun():status.is_stun = false