package common_sys

import (
	"github.com/yohamta/donburi/filter"
	"joylink.club/ecs"
	"joylink.club/rtsssimulation/component"
	"joylink.club/rtsssimulation/consts"
)

type TwoPositionMovementSys struct {
	query *ecs.Query
}

func NewTwoPositionMovementSys() *TwoPositionMovementSys {
	return &TwoPositionMovementSys{
		query: ecs.NewQuery(filter.Contains(component.TwoPositionTransformType)),
	}
}

// 更新位置
func (tp *TwoPositionMovementSys) Update(w ecs.World) {
	tp.query.Each(w, func(entry *ecs.Entry) {
		position := component.TwoPositionTransformType.Get(entry)
		if position.Speed != 0 {
			pos := position.Pos + position.Speed
			if pos < consts.TwoPosMin {
				position.Pos = consts.TwoPosMin
			} else if pos > consts.TwoPosMax {
				position.Pos = consts.TwoPosMax
			} else {
				position.Pos = pos
			}
		}
	})
}