package simulation

import (
	"encoding/binary"
	"math"

	"fmt"
	"net/http"
	"strconv"
	"sync"

	"go.uber.org/zap"
	"joylink.club/bj-rtsts-server/ats/verify/protos/state"
	"joylink.club/bj-rtsts-server/config"
	"joylink.club/bj-rtsts-server/dynamics"
	"joylink.club/bj-rtsts-server/vobc"

	"joylink.club/bj-rtsts-server/ats/verify/simulation/wayside/memory"
	"joylink.club/bj-rtsts-server/dto"
)

func init() {
	// vobc 发来的列车信息
	vobc.RegisterTrainInfoHandler(func(info []byte) {
		zap.S().Debug("接到列车信息", info)
		for _, simulation := range GetSimulationArr() {
			simulation.Memory.Status.TrainStateMap.Range(func(_, value any) bool {
				train := value.(*state.TrainState)
				if !train.Show { // 下线列车
					return false
				}
				// 拼接列车ID
				trainId, err := strconv.Atoi(train.Id)
				if err != nil {
					panic(dto.ErrorDto{Code: dto.ArgumentParseError, Message: err.Error()})
				}
				trainInfo := decoderVobcTrainState(info)
				zap.S().Info("接收到vobc发送的列车消息", trainInfo)
				// 发送给动力学
				dynamics.SendDynamicsTrainMsg(append(info, uint8(trainId)))
				// 存放至列车中
				train.VobcState = trainInfo
				return true
			})
		}

	})
	dynamics.RegisterTrainInfoHandler(func(info *dynamics.TrainInfo) {
		for _, simulation := range GetSimulationArr() {
			sta, ok := simulation.Memory.Status.TrainStateMap.Load(strconv.Itoa(int(info.Number)))
			if !ok {
				continue
			}
			trainState := sta.(*state.TrainState)
			// 给半实物仿真发送速度
			zap.S().Infof("发送到vobc发送的速度%d, %d \n", info.Speed, math.Abs(float64(info.Speed*36)))
			vobc.SendTrainSpeedTask(math.Abs(float64(info.Speed * 36)))
			// 更新列车状态
			memory.UpdateTrainState(simulation, convert(info, trainState, simulation))
		}
	})
}

// 仿真存储集合
var simulationMap sync.Map

// 创建前检查
func IsExistSimulation() bool {
	i := 0
	simulationMap.Range(func(_, _ any) bool {
		i++
		return true
	})
	return i > 0
}

// 创建仿真对象
func CreateSimulation(mapId, projectId int32) string {
	simulationId := createSimulationId(mapId)
	_, e := simulationMap.Load(simulationId)
	if !e && IsExistSimulation() {
		panic(dto.ErrorDto{Code: dto.DataAlreadyExist, Message: "已有仿真在运行"})
	}
	if !e {
		verifySimulation := memory.CreateSimulation(mapId, projectId, simulationId)
		//通知动力学
		httpCode, _, err := dynamics.SendSimulationStartReq(buildLineBaseInfo(memory.QueryMapVerifyStructure(verifySimulation.MapId)))
		if httpCode != http.StatusOK || err != nil {
			panic(dto.ErrorDto{Code: dto.LogicError, Message: fmt.Sprintf("动力学接口调用失败：[%d][%s]", httpCode, err)})
		}
		simulationMap.Store(simulationId, verifySimulation)
		dynamicsRun(verifySimulation)
	}
	return simulationId
}

// 删除仿真对象
func DestroySimulation(simulationId string) {
	simulationMap.Delete(simulationId)
	//移除道岔状态发送
	dynamics.Stop()
	//通知动力学
	httpCode, _, err := dynamics.SendSimulationEndReq()
	if httpCode != http.StatusOK || err != nil {
		panic(dto.ErrorDto{Code: dto.LogicError, Message: fmt.Sprintf("动力学接口调用失败：[%d][%s]", httpCode, err)})
	}
}

// 创建时生成仿真Id
func createSimulationId(mapId int32) string {
	// 当前服务器IP + 端口 + 地图
	return config.SimulationId_prefix + "_" + strconv.Itoa(config.Config.Server.Port) + "_" + strconv.Itoa(int(mapId))
}

// 获取仿真列表
func ListAllSimulations() []*dto.SimulationInfoRspDto {
	var simArr []*dto.SimulationInfoRspDto
	simulationMap.Range(func(_, v any) bool {
		s := v.(*memory.VerifySimulation)
		simArr = append(simArr, &dto.SimulationInfoRspDto{
			SimulationId: s.SimulationId,
			MapId:        s.MapId,
			ProjectId:    s.ProjectId,
		})
		return true
	})
	return simArr
}

// 根据仿真id查找仿真实例
func FindSimulation(simulationId string) *memory.VerifySimulation {
	m, e := simulationMap.Load(simulationId)
	if e {
		return m.(*memory.VerifySimulation)
	}
	return nil
}

// 获取普通仿真数组
func GetSimulationArr() []*memory.VerifySimulation {
	var result []*memory.VerifySimulation
	simulationMap.Range(func(_, v any) bool {
		result = append(result, v.(*memory.VerifySimulation))
		return true
	})
	return result
}

func convert(info *dynamics.TrainInfo, sta *state.TrainState, simulation *memory.VerifySimulation) *state.TrainState {
	vs := memory.QueryMapVerifyStructure(simulation.MapId)
	zap.S().Debugf("原始消息：[%d-%d-%d]", info.Number, info.Link, info.LinkOffset)
	id, port, offset, runDirection, pointTo := memory.QueryDeviceByCalcLink(vs, int32(info.Link), int64(info.LinkOffset), info.Up, sta.RunDirection)
	zap.S().Debugf("转换后的消息：[%d-车头:%s-偏移:%d-上行:%v-是否ab:%v]", info.Number, id, offset, runDirection, pointTo)
	sta.HeadDeviceId = id
	sta.DevicePort = port
	sta.HeadOffset = offset
	sta.PointTo = pointTo
	sta.RunDirection = runDirection
	//判定车头方向
	sta.HeadDirection = runDirection
	if sta.VobcState != nil {
		if sta.VobcState.DirectionForward {
			sta.HeadDirection = runDirection
		} else if sta.VobcState.DirectionBackward {
			sta.HeadDirection = !runDirection
		}
	}
	if info.Speed < 0 {
		sta.RunDirection = !sta.RunDirection
	}
	// 赋值动力学信息
	sta.DynamicState.Heartbeat = int32(info.LifeSignal)
	sta.DynamicState.HeadLinkId = strconv.Itoa(int(info.Link))
	sta.DynamicState.HeadLinkOffset = int64(info.LinkOffset)
	sta.DynamicState.Slope = int32(info.Slope)
	sta.DynamicState.Upslope = info.UpSlope
	sta.DynamicState.RunningUp = info.Up
	sta.DynamicState.RunningResistanceSum = float32(info.TotalResistance) / 1000
	sta.DynamicState.AirResistance = float32(info.AirResistance) / 1000
	sta.DynamicState.RampResistance = float32(info.SlopeResistance) / 1000
	sta.DynamicState.CurveResistance = float32(info.CurveResistance) / 1000
	sta.DynamicState.Speed = speedParse(info.Speed)
	sta.DynamicState.HeadSensorSpeed1 = speedParse(info.HeadSpeed1)
	sta.DynamicState.HeadSensorSpeed2 = speedParse(info.HeadSpeed2)
	sta.DynamicState.TailSensorSpeed1 = speedParse(info.TailSpeed1)
	sta.DynamicState.TailSensorSpeed2 = speedParse(info.TailSpeed2)
	sta.DynamicState.HeadRadarSpeed = speedParse(info.HeadRadarSpeed)
	sta.DynamicState.TailRadarSpeed = speedParse(info.TailRadarSpeed)
	return sta
}

func dynamicsRun(verifySimulation *memory.VerifySimulation) {
	_ = dynamics.Run(func() []*dynamics.TurnoutInfo {
		stateSlice := memory.GetAllTurnoutState(verifySimulation)
		var turnoutInfoSlice []*dynamics.TurnoutInfo
		for _, sta := range stateSlice {
			code64, err := strconv.ParseUint(sta.Id, 10, 16)
			if err != nil {
				zap.S().Error("id转uint16报错", err)
			}
			info := dynamics.TurnoutInfo{
				Code:      uint16(code64),
				NPosition: sta.Normal,
				RPosition: sta.Reverse,
			}
			turnoutInfoSlice = append(turnoutInfoSlice, &info)
		}
		return turnoutInfoSlice
	})
}

func buildLineBaseInfo(vs *memory.VerifyStructure) *dynamics.LineBaseInfo {
	var links []*dynamics.Link
	var slopes []*dynamics.Slope
	var curves []*dynamics.Curve
	for _, link := range vs.LinkModelMap {
		id, _ := strconv.Atoi(link.Index)
		var aTurnoutId int
		var aPort string
		if link.ARelatedSwitchRef != nil && link.ARelatedSwitchRef.SwitchDevice != nil {
			aTurnoutId, _ = strconv.Atoi(link.ARelatedSwitchRef.SwitchDevice.GetIndex())
			aPort = link.ARelatedSwitchRef.Port.Name()
		}
		var bTurnoutId int
		var bPort string
		if link.BRelatedSwitchRef != nil && link.BRelatedSwitchRef.SwitchDevice != nil {
			bTurnoutId, _ = strconv.Atoi(link.BRelatedSwitchRef.SwitchDevice.GetIndex())
			bPort = link.BRelatedSwitchRef.Port.Name()
		}
		links = append(links, &dynamics.Link{
			ID:               int32(id),
			Len:              link.Length,
			ARelTurnoutId:    int32(aTurnoutId),
			ARelTurnoutPoint: aPort,
			BRelTurnoutId:    int32(bTurnoutId),
			BRelTurnoutPoint: bPort,
		})
	}
	return &dynamics.LineBaseInfo{
		LinkList:  links,
		SlopeList: slopes,
		CurveList: curves,
	}
}

// 解析VOBC列车信息
func decoderVobcTrainState(buf []byte) *state.TrainVobcState {
	trainVobcInfo := &state.TrainVobcState{}
	trainVobcInfo.LifeSignal = int32(binary.BigEndian.Uint16(buf[0:2]))
	b2 := buf[2]
	trainVobcInfo.Tc1Active = (b2 & 1) != 0
	trainVobcInfo.Tc2Active = (b2 & (1 << 1)) != 0
	trainVobcInfo.DirectionForward = (b2 & (1 << 2)) != 0
	trainVobcInfo.DirectionBackward = (b2 & (1 << 3)) != 0
	trainVobcInfo.TractionStatus = (b2 & (1 << 4)) != 0
	trainVobcInfo.BrakingStatus = (b2 & (1 << 5)) != 0
	trainVobcInfo.EmergencyBrakingStatus = (b2 & (1 << 6)) != 0
	trainVobcInfo.TurnbackStatus = (b2 & 7) != 0
	b3 := buf[3]
	trainVobcInfo.JumpStatus = (b3 & 1) != 0
	trainVobcInfo.Ato = (b3 & (1 << 1)) != 0
	trainVobcInfo.Fam = (b3 & (1 << 2)) != 0
	trainVobcInfo.Cam = (b3 & (1 << 3)) != 0
	trainVobcInfo.TractionSafetyCircuit = (b3 & (1 << 4)) != 0
	trainVobcInfo.ParkingBrakeStatus = (b3 & (1 << 5)) != 0
	trainVobcInfo.MaintainBrakeStatus = (b3 & (1 << 6)) != 0
	trainVobcInfo.TractionForce = int64(binary.BigEndian.Uint16(buf[4:6]) / 100)
	trainVobcInfo.BrakeForce = int64(binary.BigEndian.Uint16(buf[6:8]) / 100)
	trainVobcInfo.TrainLoad = int64(binary.BigEndian.Uint16(buf[8:10]) / 100)
	b4 := buf[15]
	trainVobcInfo.LeftDoorOpenCommand = (b4 & 1) != 0
	trainVobcInfo.RightDoorOpenCommand = (b4 & (1 << 1)) != 0
	trainVobcInfo.LeftDoorCloseCommand = (b4 & (1 << 2)) != 0
	trainVobcInfo.RightDoorCloseCommand = (b4 & (1 << 3)) != 0
	trainVobcInfo.AllDoorClose = (b4 & (1 << 4)) != 0
	return trainVobcInfo
}

// 发送给前端的速度格式化
func speedParse(speed float32) int32 {
	return int32(math.Abs(float64(speed * 3.6 * 100)))
}