package system

import (
	"fmt"
	"github.com/yohamta/donburi/filter"
	"joylink.club/ecs"
)

// PercentageDeviceState 百分比设备
// 起始位置p=0,终点位置p=100000,总路程100000
type PercentageDeviceState struct {
	//速度,矢量
	V int64
	//位置,[PD_L,PD_M]
	P int64
}

func NewPercentageDeviceStateL() *PercentageDeviceState {
	return &PercentageDeviceState{V: 0, P: PD_L}
}
func NewPercentageDeviceStateM() *PercentageDeviceState {
	return &PercentageDeviceState{V: 0, P: PD_M}
}
func (me *PercentageDeviceState) isToL() bool {
	return me.P <= PD_L
}
func (me *PercentageDeviceState) isToM() bool {
	return me.P >= PD_M
}

// GetRate 获取百分比即(P/(PD_M-PD_L))*100
func (me *PercentageDeviceState) GetRate() int8 {
	if me.P < PD_L {
		me.P = PD_L
	}
	if me.P > PD_M {
		me.P = PD_M
	}
	return int8((float64(me.P) / float64(PD_M)) * float64(100))
}

// SetRate 设置百分比即P=(PD_M-PD_L)*(rate/100)
func (me *PercentageDeviceState) SetRate(rate int8) {
	if rate < 0 || rate > 100 {
		panic(fmt.Sprintf("rate须在[0,100]中，rate=%d", rate))
	}
	me.P = int64(float64(PD_M-PD_L) * (float64(rate) / float64(100)))
}

// 百分比设备位置范围
const (
	PD_L int64 = 0
	PD_M int64 = 100000
)

// PercentageDeviceStateComponent 一维移动的物体组件
var PercentageDeviceStateComponent = ecs.NewComponentType[PercentageDeviceState]()
var PercentageDeviceState1Component = ecs.NewComponentType[PercentageDeviceState]()
var PercentageDeviceState2Component = ecs.NewComponentType[PercentageDeviceState]()

type PercentageMovableSystem struct {
	query *ecs.Query
}

func NewPercentageMovableSystem() *PercentageMovableSystem {
	return &PercentageMovableSystem{
		query: ecs.NewQuery(filter.Or(filter.Contains(PercentageDeviceStateComponent), filter.Contains(PercentageDeviceState1Component), filter.Contains(PercentageDeviceState2Component))),
	}
}

// Update world 执行
func (me *PercentageMovableSystem) Update(w ecs.World) {
	me.query.Each(w, func(e *ecs.Entry) {
		var state *PercentageDeviceState
		if e.HasComponent(PercentageDeviceStateComponent) {
			state = PercentageDeviceStateComponent.Get(e)
		}
		if e.HasComponent(PercentageDeviceState1Component) {
			state = PercentageDeviceState1Component.Get(e)
		}
		if e.HasComponent(PercentageDeviceState2Component) {
			state = PercentageDeviceState2Component.Get(e)
		}
		if state != nil {
			me.move(w, state)
		}
	})
}
func (me *PercentageMovableSystem) move(w ecs.World, state *PercentageDeviceState) {
	state.P += state.V * int64(w.Tick())
	if state.P < PD_L {
		state.P = PD_L
	}
	if state.P > PD_M {
		state.P = PD_M
	}
}