package system

import (
	"fmt"

	"github.com/yohamta/donburi/filter"
	"joylink.club/ecs"
	"joylink.club/rtsssimulation/components"
	"joylink.club/rtsssimulation/cstate"
)

type SignalSystem struct {
}

// 信号机显示状态查询
var signalQuery *ecs.Query = ecs.NewQuery(filter.Contains(components.DeviceIdentityComponent, components.SignalStateComponent))

// world 执行
func (me *SignalSystem) Update(world ecs.World) {

}
func NewSignalSystem() *SignalSystem {
	return &SignalSystem{}
}

// 设置某个信号机的显示
// 返回值：true-设置成功，false-设置失败
func SetSignalDisplay(w ecs.World, signalId string, display cstate.SignalAspect) error {
	signalEntry, err := findSignalEntry(w, signalId)
	if err != nil {
		return err
	}
	//
	signalState := components.SignalStateComponent.Get(signalEntry)
	signalState.Display = display
	//
	return nil
}

// 获取信号机实体
func findSignalEntry(w ecs.World, signalId string) (*ecs.Entry, error) {
	var signalEntry *ecs.Entry = queryEntityById(w, signalQuery, signalId)
	if signalEntry != nil {
		return signalEntry, nil
	} else {
		return nil, fmt.Errorf("信号机[%s]的实体不存在", signalId)
	}
}