package system

import (
	"joylink.club/ecs"
	"joylink.club/ecs/filter"
)

// ButtonState 广义按钮开关状态，开关有三个接点，分别为公共接点、常开点和常闭点
type ButtonState struct {
	//true-公共接点接通常开点，false-公共接点接通常闭点
	Ckd bool
}

// ButtonSelfRestState 广义自复位按钮，复位状态
type ButtonSelfRestState struct {
	//自复位按钮保持按下剩余时间，ms
	KeepAxTime int64
}

var (
	ButtonStateComponent = ecs.NewComponentType[ButtonState]()
	ButtonSelfRestTag    = ecs.NewComponentType[ButtonSelfRestState]() //自复位按钮标签
	ButtonNonRestTag     = ecs.NewTag()                                //非自复位按钮标签
)

type ButtonSystem struct {
	selfRestQuery *ecs.Query
}

func NewButtonSystem() *ButtonSystem {
	return &ButtonSystem{selfRestQuery: ecs.NewQuery(filter.Contains(ButtonStateComponent, ButtonSelfRestTag))}
}
func NewButtonState() *ButtonState {
	return &ButtonState{Ckd: false}
}

// Update world 执行
func (me *ButtonSystem) Update(w ecs.World) {
	me.selfRestQuery.Each(w, func(e *ecs.Entry) {
		state := ButtonStateComponent.Get(e)
		me.calculateSelfRest(w, e, state)
	})
}

// 自复位按钮运算
func (me *ButtonSystem) calculateSelfRest(w ecs.World, e *ecs.Entry, state *ButtonState) {
	if state.Ckd {
		reset := ButtonSelfRestTag.Get(e)
		if reset.KeepAxTime > 0 {
			reset.KeepAxTime -= int64(w.Tick())
			if reset.KeepAxTime < 0 {
				reset.KeepAxTime = 0
			}
		}
		if reset.KeepAxTime <= 0 {
			state.Ckd = false
		}
	}
}