package memory

import (
	"fmt"
	"math"
	"sort"
	"strconv"
	"strings"
	"sync"

	"joylink.club/rtsssimulation/repository"
	proto2 "joylink.club/rtsssimulation/repository/model/proto"

	"google.golang.org/protobuf/proto"
	"joylink.club/bj-rtsts-server/db/dbquery"
	"joylink.club/bj-rtsts-server/db/model"
	"joylink.club/bj-rtsts-server/dto"
	"joylink.club/bj-rtsts-server/sys_error"
	"joylink.club/bj-rtsts-server/ts/protos/graphicData"
	"joylink.club/bj-rtsts-server/ts/protos/state"
)

var (
	giTypeMap sync.Map
	giNameMap sync.Map
	giDataMap sync.Map
)

// 将发布的地图数据放入内存中
func PublishMapVerifyStructure(graphic *model.PublishedGi) {
	giTypeMap.Store(graphic.ID, graphicData.PictureType(graphic.Type))
	giNameMap.Store(graphic.Name, graphic.ID)
	var message proto.Message
	switch graphicData.PictureType(graphic.Type) {
	case graphicData.PictureType_StationLayout:
		message = &graphicData.RtssGraphicStorage{}
	case graphicData.PictureType_RelayCabinetLayout:
		message = &graphicData.RelayCabinetGraphicStorage{}
	case graphicData.PictureType_Psl:
		message = &graphicData.PslGraphicStorage{}
	case graphicData.PictureType_IBP:
		message = &graphicData.IBPGraphicStorage{}
	}
	err := proto.Unmarshal(graphic.Proto, message)
	if err != nil {
		panic(&dto.ErrorDto{Code: dto.LogicError, Message: fmt.Sprintf("[id:%d]proto数据反序列化失败:%s", graphic.ID, err)})
	}
	giDataMap.Store(graphic.ID, message)
	// 初始化地图结构
	switch graphicData.PictureType(graphic.Type) {
	case graphicData.PictureType_StationLayout:
		graphicStorage := message.(*graphicData.RtssGraphicStorage)
		giUidMap.Store(graphic.ID, initStationUid(graphicStorage))
	case graphicData.PictureType_RelayCabinetLayout:
		graphicStorage := message.(*graphicData.RelayCabinetGraphicStorage)
		giUidMap.Store(graphic.ID, initRelayCabinetUid(graphicStorage))
	}
}

func GenerateElementUid(city, lineId string, stationIndexList []string, code string) string {
	sort.Strings(stationIndexList)
	var idArr []string
	idArr = append(idArr, city, lineId)
	idArr = append(idArr, stationIndexList...)
	idArr = append(idArr, code)
	return strings.Join(idArr, "_")
}

// 移除内存中的地图信息
func DeleteMapVerifyStructure(mapId int32) {
	giTypeMap.Delete(mapId)
	giDataMap.Delete(mapId)
	giUidMap.Delete(mapId)
}

func QueryGiType(mapId int32) graphicData.PictureType {
	value, ok := giTypeMap.Load(mapId)
	if !ok {
		graphic, err := dbquery.PublishedGi.Debug().Where(dbquery.PublishedGi.ID.Eq(mapId)).First() // 当缓存缺失新地图时，查询一次
		if err != nil {
			panic(&dto.ErrorDto{Code: dto.LogicError, Message: fmt.Sprintf("[mapId:%d]类型映射错误 :%v", mapId, value)})
		}
		PublishMapVerifyStructure(graphic)
		return graphicData.PictureType(graphic.Type)
	}
	return value.(graphicData.PictureType)
}

func QueryGiData[T proto.Message](mapId int32) T {
	value, _ := giDataMap.Load(mapId)
	return value.(T)
}

func QueryGiId(name string) int32 {
	value, _ := giNameMap.Load(name)
	return value.(int32)
}

// 根据区段，道岔偏移量返回linkID和link相对偏移量
func QueryEcsLinkByDeviceInfo(repo *repository.Repository, mapId int32, status *state.TrainState) (int32, int64, bool, bool, int64) {
	id := status.HeadDeviceId
	if status.DevicePort == "" {
		uid := QueryUidByMidAndComId(mapId, id, &graphicData.Section{})
		return sectionMapToEcsLink(repo, uid, status)
	} else {
		uid := QueryUidByMidAndComId(mapId, id, &graphicData.Turnout{})
		return turnoutMapToEcsLink(repo, uid, status)
	}
}

func getStorageIBPMapData(mapCode string) *graphicData.IBPGraphicStorage {
	// 处理关联的IBP盘信息
	if mapCode == "" {
		return nil
	}
	ibpId, ok := giNameMap.Load(mapCode)
	if !ok {
		return nil
	}
	ibpMapData, ok := giDataMap.Load(ibpId)
	if !ok {
		return nil
	}
	return ibpMapData.(*graphicData.IBPGraphicStorage)
}

// 根据物理区段上的偏移量（基于区段A端），找到所在link的linkId与偏移量
func sectionMapToEcsLink(repo *repository.Repository, id string, status *state.TrainState) (int32, int64, bool, bool, int64) {
	runDirection := status.RunDirection
	section := repo.FindPhysicalSection(id)
	if section == nil {
		panic(sys_error.New(fmt.Sprintf("地图不存在uid:%s缓存", id)))
	}
	ao, bo := section.ALinkPosition().Offset(), section.BLinkPosition().Offset()
	// 检查区段长度是否足够放下列车
	status.HeadOffset = checkDeviceContainTrain(status.HeadOffset, status.TrainLength, bo-ao, id)
	link := section.ALinkPosition().Link()
	// 是否从A到B，统一坐标
	ak, bk := convertRepoBaseKm(repo, section.AKilometer()), convertRepoBaseKm(repo, section.BKilometer())
	akv, bkv := ak.Value, bk.Value
	// 上行
	var up, abDirection bool
	if runDirection {
		abDirection = akv < bkv
		if abDirection {
			up = ao < bo
		} else {
			up = ao > bo
		}
	} else {
		abDirection = akv > bkv
		if abDirection {
			up = ao < bo
		} else {
			up = ao > bo
		}
	}
	linkId, _ := strconv.Atoi(link.Identity.Id())
	trainKilometer := concertTrainKilometer(akv, status.HeadOffset, up)
	if ao < bo {
		return int32(linkId), ao + status.HeadOffset, up, abDirection, trainKilometer
	} else {
		return int32(linkId), ao - status.HeadOffset, up, abDirection, trainKilometer
	}
}

// 根据道岔上的偏移量（基于岔心位置），找到所在link的linkId与偏移量
func turnoutMapToEcsLink(repo *repository.Repository, id string, status *state.TrainState) (int32, int64, bool, bool, int64) {
	port, runDirection := status.DevicePort, status.RunDirection
	turnout := repo.FindTurnout(id)
	if turnout == nil {
		panic(sys_error.New(fmt.Sprintf("不存在道岔【uid:%s】", id)))
	}
	var portPosition *repository.LinkPosition
	var crossKm, portKm *proto2.Kilometer
	switch port {
	case "A":
		portPosition = turnout.FindLinkPositionByPort(proto2.Port_A)
		portKm = turnout.GetTurnoutKm(proto2.Port_A)
	case "B":
		portPosition = turnout.FindLinkPositionByPort(proto2.Port_B)
		portKm = turnout.GetTurnoutKm(proto2.Port_B)
	case "C":
		portPosition = turnout.FindLinkPositionByPort(proto2.Port_C)
		portKm = turnout.GetTurnoutKm(proto2.Port_C)
	default:
		panic(sys_error.New(fmt.Sprintf("无效端口【%s】偏移量", port)))
	}
	// 岔心公里标
	crossKm = turnout.GetTurnoutKm(proto2.Port_None)
	portKm, err := repo.ConvertKilometer(portKm, crossKm.CoordinateSystem)
	if err != nil {
		panic(sys_error.New("公里标转换出错", err))
	}
	// 检查link偏移
	status.HeadOffset = checkDeviceContainTrain(status.HeadOffset, status.TrainLength, crossKm.Value-portKm.Value, id)
	// 关联link
	link := portPosition.Link()
	isStart := link.ARelation().Device().Id() == id
	up := runDirection
	if (portKm.Value > crossKm.Value) != isStart {
		up = !runDirection
	}
	pointTo := (portKm.Value > crossKm.Value) == runDirection
	trainKilometer := concertTrainKilometer(crossKm.Value, status.HeadOffset, pointTo)
	linkId, _ := strconv.Atoi(link.Identity.Id())
	if isStart {
		return int32(linkId), status.HeadOffset, up, pointTo, trainKilometer
	} else {
		// 道岔长度
		turnoutLen := int64(math.Abs(float64(portKm.Value - crossKm.Value)))
		return int32(linkId), portPosition.Offset() + turnoutLen - status.HeadOffset, up, pointTo, trainKilometer
	}
}

// 根据linkID和link相对偏移量返回区段，道岔偏移量
// 设备ID、端口、偏移量、上下行、AB走向
func QueryDeviceByCalcLink(repo *repository.Repository, id string, offset int64, up bool) (
	deviceId, port string, deviceOffset int64, runDirection, pointTo bool, km int64) {
	link := repo.FindLink(id)
	if link == nil {
		panic(dto.ErrorDto{Code: dto.DataNotExist, Message: fmt.Sprintf("未找到link【%s】", id)})
	}
	if offset > link.Length() {
		panic(dto.ErrorDto{Code: dto.DataNotExist, Message: fmt.Sprintf("偏移【%d】超出link范围【%d】", offset, link.Length())})
	}
	// 判断是否在道岔上
	onTurnout, isA := isOnLinkTurnout(link, offset)
	if onTurnout {
		return ecsLinkMapToTurnout(repo, isA, offset, up, link)
	} else {
		return ecsLinkMapToSection(repo, offset, up, link)
	}
}

// 是否在link的道岔上
func isOnLinkTurnout(link *repository.Link, offset int64) (bool, bool) {
	aTp := link.ARelation()
	var turnoutOffset int64
	if aTp != nil {
		turnoutOffset = aTp.Turnout().FindLinkPositionByPort(aTp.Port()).Offset()
	}
	if offset <= turnoutOffset {
		return true, true
	}
	bTp := link.BRelation()
	if bTp != nil {
		turnoutOffset = bTp.Turnout().FindLinkPositionByPort(bTp.Port()).Offset()
		return offset >= turnoutOffset, false
	}
	return false, false
}

// 处理在道岔上link映射
func ecsLinkMapToTurnout(repo *repository.Repository, isA bool, offset int64, up bool, link *repository.Link) (
	deviceId, port string, deviceOffset int64, runDirection, pointTo bool, km int64) {
	tp := link.ARelation()
	if !isA {
		tp = link.BRelation()
	}
	deviceId = tp.Turnout().Id()
	tpOffset := tp.Turnout().FindLinkPositionByPort(tp.Port()).Offset()
	crossKmInfo, portKmInfo := tp.Turnout().GetTurnoutKm(proto2.Port_None), tp.Turnout().GetTurnoutKm(tp.Port())
	portKmInfo, err := repo.ConvertKilometer(portKmInfo, crossKmInfo.CoordinateSystem)
	if err != nil {
		panic(err)
	}
	crossKm, portKm := crossKmInfo.Value, portKmInfo.Value
	if isA {
		deviceOffset = tpOffset - (tpOffset - offset)
		pointTo = !up
	} else {
		deviceOffset = link.Length() - offset
		pointTo = up
	}
	// 查询公里标大于端口公里标
	if crossKm > portKm {
		km = crossKm - deviceOffset
	} else {
		km = crossKm + deviceOffset
	}
	if up && isA { // link offset 趋大，A端岔心 ---> 边界
		runDirection = crossKm < portKm
	} else if up && !isA { // link offset 趋大，B端边界 ---> 岔心
		runDirection = crossKm > portKm
	} else if !up && isA { // link offset 趋小，A端边界 ---> 岔心
		runDirection = crossKm > portKm
	} else { // link offset 趋小，B端岔心 ---> 边界
		runDirection = crossKm < portKm
	}
	switch tp.Port() {
	case proto2.Port_A:
		port = "A"
	case proto2.Port_B:
		port = "B"
	case proto2.Port_C:
		port = "C"
	}
	return
}

// 处理在道岔上link映射
func ecsLinkMapToSection(repo *repository.Repository, offset int64, up bool, link *repository.Link) (
	deviceId, port string, deviceOffset int64, runDirection, pointTo bool, km int64) {
	var section *repository.PhysicalSection
	for _, s := range link.PhysicalSections() {
		ao, bo := s.ALinkPosition().Offset(), s.BLinkPosition().Offset()
		if (ao < offset && offset <= bo) || (bo < offset && offset <= ao) {
			section = s
			break
		}
	}
	if section == nil {
		panic(dto.ErrorDto{Code: dto.DataNotExist, Message: fmt.Sprintf("未找到link设备偏移【%d】", offset)})
	}
	// 元素ID
	deviceId = section.Id()
	// link偏移变大方向
	ao, bo := section.ALinkPosition().Offset(), section.BLinkPosition().Offset()
	ak, bk := convertRepoBaseKm(repo, section.AKilometer()), convertRepoBaseKm(repo, section.BKilometer())
	akv, bkv := ak.Value, bk.Value
	if up {
		if ao < bo {
			runDirection = akv < bkv
		} else {
			runDirection = akv > bkv
		}
	} else {
		if ao > bo {
			runDirection = akv < bkv
		} else {
			runDirection = akv > bkv
		}
	}
	pointTo = runDirection == (akv < bkv)
	// a点偏移 大于 b点偏移
	if ao > bo {
		deviceOffset = ao - offset
	} else {
		deviceOffset = offset - ao
	}
	// a点公里标 大于 b点公里标
	if akv > bkv {
		km = akv - deviceOffset
	} else {
		km = akv + deviceOffset
	}
	return
}

// 查找列车的公里标
func concertTrainKilometer(kilometer, offset int64, tendTo bool) int64 {
	if tendTo {
		return kilometer - offset
	} else {
		return kilometer + offset
	}
}

// 转换成统一坐标公里标
func convertRepoBaseKm(r *repository.Repository, km *proto2.Kilometer) *proto2.Kilometer {
	k, err := r.ConvertKilometer(km, r.GetCoordinateInfo().Coordinate)
	if err != nil {
		panic(err)
	}
	return k
}

// 检查列车是否可以放到设备上
func checkDeviceContainTrain(offset, trainLen, deviceLen int64, deviceName string) int64 {
	l := int64(math.Abs(float64(deviceLen)))
	if offset > l {
		panic(sys_error.New(fmt.Sprintf("偏移【%d】超出【%s】范围【%d】", offset, deviceName, l)))
	}
	if trainLen > offset { // 如果列车长度超过设置offset
		offset = trainLen
	}
	if offset > l {
		panic(sys_error.New(fmt.Sprintf("列车长度【%d】超出【%s】范围【%d】", trainLen, deviceName, l)))
	}
	return offset
}