package memory

import (
	"encoding/hex"
	"fmt"
	"strings"

	"joylink.club/bj-rtsts-server/dto"
	"joylink.club/bj-rtsts-server/dto/data_proto"
	"joylink.club/bj-rtsts-server/sys_error"
	"joylink.club/rtsssimulation/component"
	"joylink.club/rtsssimulation/component/component_data"
	"joylink.club/rtsssimulation/entity"
	"joylink.club/rtsssimulation/repository"
	"joylink.club/rtsssimulation/repository/model/proto"
	"joylink.club/rtsssimulation/util/number"
	"sort"
)

// BalisePositionModify 应答器移位
func BalisePositionModify(simulation *VerifySimulation, req *dto.BaliseMoveReqDto) *sys_error.BusinessError {
	uid := QueryMapUidMapByType(req.MapId, &data_proto.Transponder{})[req.BaliseId].Uid
	transponder := simulation.Repo.FindTransponder(uid)
	if transponder == nil {
		return sys_error.New(fmt.Sprintf("未找到[mapId:%d id:%d]的应答器", req.MapId, req.BaliseId))
	}
	//将请求参数中的公里标转为rtss仿真所用的公里标
	km := &proto.Kilometer{
		Value:            req.Km.Kilometer,
		CoordinateSystem: req.Km.CoordinateSystem,
	}
	if req.Km.Direction == data_proto.KilometerSystem_LEFT {
		km.Direction = proto.Direction_LEFT
	} else if req.Km.Direction == data_proto.KilometerSystem_RIGHT {
		km.Direction = proto.Direction_RIGHT
	} else {
		panic(fmt.Sprintf("未知的公里标方向[%d]", req.Km.Direction))
	}
	//将应答器所在Link的两端公里标转为请求参数中公里标的坐标系
	link := transponder.LinkPosition().Link()
	akm, err := repository.ConvertKilometer(simulation.Repo, link.AKm(), km.CoordinateSystem)
	if err != nil {
		panic(sys_error.New("应答器所在Link的起点公里标转换失败"))
	}
	bkm, err := repository.ConvertKilometer(simulation.Repo, link.BKm(), km.CoordinateSystem)
	if err != nil {
		panic(sys_error.New("应答器所在Link的终点公里标转换失败"))
	}
	//筛选出Link上所有的应答器，并按公里标大小排序
	var transponders []*repository.Transponder
	for _, device := range link.Devices() {
		t, ok := device.(*repository.Transponder)
		if ok {
			transponders = append(transponders, t)
		}
	}
	sort.Slice(transponders, func(i, j int) bool {
		aT := transponders[i]
		bT := transponders[j]
		aTKm, err := repository.ConvertKilometer(simulation.Repo, aT.Km(), km.CoordinateSystem)
		if err != nil {
			panic(sys_error.New(fmt.Sprintf("应答器[id:%s]公里标转换失败", aT.Id())))
		}
		bTKm, err := repository.ConvertKilometer(simulation.Repo, bT.Km(), km.CoordinateSystem)
		if err != nil {
			panic(sys_error.New(fmt.Sprintf("应答器[id:%s]公里标转换失败", bT.Id())))
		}
		return aTKm.Value < bTKm.Value
	})
	//确保请求的公里标没有超出Link范围且在相邻的应答器之间
	var minKm *proto.Kilometer
	var maxKm *proto.Kilometer
	if akm.Value < bkm.Value {
		minKm = akm
		maxKm = bkm
	} else {
		minKm = bkm
		maxKm = akm
	}
	for i, t := range transponders {
		if t == transponder {
			if i > 0 {
				minKm, err = repository.ConvertKilometer(simulation.Repo, transponders[i-1].Km(), km.CoordinateSystem)
			}
			if i < len(transponders)-1 {
				maxKm, err = repository.ConvertKilometer(simulation.Repo, transponders[i+1].Km(), km.CoordinateSystem)
			}
		}
	}
	//更新应答器公里标和Link位置
	entry, _ := entity.GetEntityByUid(simulation.World, uid)
	if km.Value <= minKm.Value || km.Value >= maxKm.Value {
		return sys_error.New("位置设置错误，必须在相邻的应答器/道岔/轨道边界之间")
	}
	component.KmType.Set(entry, km)
	offset := number.Abs(km.Value - akm.Value)
	component.LinkPositionType.Set(entry, &component_data.LinkPosition{
		LinkId: link.Id(),
		Offset: offset,
	})
	return nil
}

// BalisePositionReset 应答器复位
func BalisePositionReset(simulation *VerifySimulation, req *dto.BaliseReqDto) error {
	uid := QueryMapUidMapByType(req.MapId, &data_proto.Transponder{})[req.BaliseId].Uid
	balise := simulation.Repo.FindTransponder(uid)
	if balise == nil {
		return sys_error.New(fmt.Sprintf("未找到[mapId:%d id:%d]的应答器", req.MapId, req.BaliseId))
	}
	return balisePositionReset(simulation, balise)
}

func balisePositionReset(simulation *VerifySimulation, balise *repository.Transponder) error {
	entry, _ := entity.GetEntityByUid(simulation.World, balise.Id())
	component.KmType.Set(entry, balise.Km())
	component.LinkPositionType.SetValue(entry, component_data.LinkPosition{
		LinkId: balise.LinkPosition().Link().Id(),
		Offset: balise.LinkPosition().Offset(),
	})
	return nil
}

// BaliseTelegramModify 修改应答器报文
func BaliseTelegramModify(simulation *VerifySimulation, req *dto.BaliseModifyTelegramReqDto) error {
	uid := QueryMapUidMapByType(req.MapId, &data_proto.Transponder{})[req.BaliseId].Uid
	entry, ok := entity.GetEntityByUid(simulation.World, uid)
	if !ok {
		return sys_error.New(fmt.Sprintf("没有[mapId:%d id:%d]的应答器", req.MapId, req.BaliseId))
	}
	if len(req.Telegram) != 256 {
		return sys_error.New(fmt.Sprintf("报文长度必须为[%d]", 256))
	}
	bytes, err := hex.DecodeString(req.Telegram)
	if err != nil {
		return sys_error.New("报文解析出错", err)
	}
	component.BaliseStateType.SetValue(entry, component.BaliseState{ValidTelegram: bytes})
	return nil
}

// BaliseTelegramReset 重置应答器报文
func BaliseTelegramReset(simulation *VerifySimulation, req *dto.BaliseReqDto) error {
	uid := QueryMapUidMapByType(req.MapId, &data_proto.Transponder{})[req.BaliseId].Uid
	worldData := entity.GetWorldData(simulation.World)
	balise := worldData.Repo.FindTransponder(uid)
	if balise == nil {
		return sys_error.New(fmt.Sprintf("未找到[mapId:%d id:%d]的应答器", req.MapId, req.BaliseId))
	}
	return baliseTelegramReset(simulation, balise)
}

func baliseTelegramReset(simulation *VerifySimulation, balise *repository.Transponder) error {
	entry, _ := entity.GetEntityByUid(simulation.World, balise.Id())
	component.BaliseStateType.SetValue(entry, component.BaliseState{
		ValidTelegram: balise.FixedTelegram(),
	})
	return nil
}

// BaliseReset 重置应答器所有状态
func BaliseReset(simulation *VerifySimulation) error {
	var errs []error
	for _, balise := range simulation.Repo.ResponderList() {
		err := baliseTelegramReset(simulation, balise)
		if err != nil {
			errs = append(errs, err)
		}
		err = balisePositionReset(simulation, balise)
		if err != nil {
			errs = append(errs, err)
		}
	}
	if len(errs) > 0 {
		var userMsg []string
		for _, err := range errs {
			be, ok := err.(*sys_error.BusinessError)
			if ok {
				userMsg = append(userMsg, be.UserMsg)
			}
		}
		return sys_error.New(strings.Join(userMsg, "\n"))
	}
	return nil
}