package simulation

import (
	"encoding/binary"
	"log/slog"
	"math"
	"time"

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

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

	"joylink.club/bj-rtsts-server/ats/verify/protos/state"
	"joylink.club/bj-rtsts-server/ats/verify/simulation/wayside/memory"
	"joylink.club/bj-rtsts-server/config"
	"joylink.club/bj-rtsts-server/dynamics"
	"joylink.club/bj-rtsts-server/vobc"

	"joylink.club/bj-rtsts-server/dto"
)

func init() {
	// vobc 发来的列车信息
	vobc.RegisterTrainInfoHandler(func(info []byte) {
		memory.UdpUpdateTime.VobcTime = time.Now().UnixMilli()
		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)
				d := append(info, uint8(trainId))
				// 发送给动力学
				dynamics.SendDynamicsTrainMsg(d)
				// 存放至列车中
				train.VobcState = trainInfo
				return true
			})
		}
	})
	dynamics.RegisterTrainInfoHandler(func(info *dynamics.TrainInfo) {
		memory.UdpUpdateTime.DynamicsTime = time.Now().UnixMilli()
		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
			vobc.SendTrainSpeedTask(convertVobc(info))
			// 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(projectId int32, mapIds []int32) string {
	simulationId := createSimulationId(projectId)
	_, e := simulationMap.Load(simulationId)
	if !e && IsExistSimulation() {
		panic(dto.ErrorDto{Code: dto.DataAlreadyExist, Message: "已有仿真在运行"})
	}
	if !e {
		verifySimulation, err := memory.CreateSimulation(projectId, mapIds)
		if err != nil {
			panic(fmt.Sprintf("创建仿真失败:%s", err.Error()))
		}
		verifySimulation.SimulationId = simulationId
		//通知动力学
		lineBaseInfo := buildLineBaseInfo(verifySimulation)
		httpCode, _, err := dynamics.SendSimulationStartReq(lineBaseInfo)
		if httpCode != http.StatusOK || err != nil {
			panic(dto.ErrorDto{Code: dto.DynamicsError, 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) {
	s, e := simulationMap.Load(simulationId)
	if !e {
		return
	}
	simulationInfo := s.(*memory.VerifySimulation)
	simulationMap.Delete(simulationId)
	// 停止ecs world
	simulationInfo.World.Close()
	//ecsSimulation.DestroySimulation(simulationInfo.WorldId)
	//移除道岔状态发送
	dynamics.Stop()
	//通知动力学
	httpCode, _, err := dynamics.SendSimulationEndReq()
	if httpCode != http.StatusOK {
		panic(dto.ErrorDto{Code: dto.DynamicsError, Message: fmt.Sprintf("动力学接口调用失败：[%d][%s]", httpCode, err)})
	}
}

func createSimulationId(projectId int32) string {
	// 当前服务器IP + 端口 + 项目
	return config.SimulationId_prefix + "_" + strconv.Itoa(config.Config.Server.Port) + "_" + strconv.Itoa(int(projectId))
}

// 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.MapIds[0],
			MapIds:       s.MapIds,
			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 {
	if sta.VobcState != nil && sta.VobcState.LifeSignal == int32(info.VobcLifeSignal) {
		sta.DynamicState.DiffTime = time.Now().UnixMilli() - sta.VobcState.UpdateTime
	} else {
		sta.DynamicState.DiffTime = 999
	}
	slog.Debug("收到动力学原始消息", "Number", info.Number, "Link", info.Link, "LinkOffset", info.LinkOffset)
	id, port, offset, runDirection, pointTo, kilometer := memory.QueryDeviceByCalcLink(simulation.Repo, strconv.Itoa(int(info.Link)), int64(info.LinkOffset), info.Up)
	slog.Debug("处理动力学转换后的消息", "number", info.Number,
		"车头位置", id, "偏移", offset, "是否上行", runDirection, "是否ab", pointTo)
	sta.HeadDeviceId = simulation.GetComIdByUid(id)
	sta.DevicePort = port
	sta.HeadOffset = offset
	sta.PointTo = pointTo
	sta.TrainKilometer = kilometer
	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)
	sta.DynamicState.Acceleration = info.Acceleration
	return sta
}

// 转换成Vobc发送参数
func convertVobc(info *dynamics.TrainInfo) *vobc.SendTrainInfo {
	param := &vobc.SendTrainInfo{
		Speed:           uint16(math.Abs(float64(info.Speed * 36))),
		Upslope:         info.UpSlope,
		Slope:           uint16(info.Slope),
		TotalResistance: uint32(math.Abs(float64(info.TotalResistance / 10))),
		AirResistance:   uint32(info.AirResistance / 10),
		SlopeResistance: uint32(math.Abs(float64(info.SlopeResistance / 10))),
		CurveResistance: uint32(info.CurveResistance / 10),
	}
	d := math.Abs(float64(info.Acceleration * 100))
	if info.Acceleration > 0 {
		param.Acceleration = uint8(d)
	} else {
		param.Deceleration = uint8(d)
	}
	return param
}

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 {
				slog.Error("id转uint16报错", err)
			}
			info := dynamics.TurnoutInfo{
				Code:      uint16(code64),
				NPosition: sta.Dw,
				RPosition: sta.Fw,
			}
			turnoutInfoSlice = append(turnoutInfoSlice, &info)
		}
		return turnoutInfoSlice
	})
}

func buildLineBaseInfo(sim *memory.VerifySimulation) *dynamics.LineBaseInfo {
	info := &dynamics.LineBaseInfo{}
	for _, model := range sim.Repo.LinkList() {
		id, _ := strconv.Atoi(model.Id())
		link := &dynamics.Link{
			ID:  int32(id),
			Len: int32(model.Length()),
		}
		info.LinkList = append(info.LinkList, link)
		if model.ARelation() != nil {
			turnoutId, _ := strconv.Atoi(sim.GetComIdByUid(model.ARelation().Device().Id()))
			link.ARelTurnoutId = int32(turnoutId)
			switch model.ARelation().Port() {
			case proto.Port_A:
				link.ARelTurnoutPoint = "A"
			case proto.Port_B:
				link.ARelTurnoutPoint = "B"
			case proto.Port_C:
				link.ARelTurnoutPoint = "C"
			}
		}
		if model.BRelation() != nil {
			turnoutId, _ := strconv.Atoi(sim.GetComIdByUid(model.BRelation().Device().Id()))
			link.BRelTurnoutId = int32(turnoutId)
			switch model.BRelation().Port() {
			case proto.Port_A:
				link.BRelTurnoutPoint = "A"
			case proto.Port_B:
				link.BRelTurnoutPoint = "B"
			case proto.Port_C:
				link.BRelTurnoutPoint = "C"
			}
		}
	}
	for _, model := range sim.Repo.SlopeList() {
		id, _ := strconv.Atoi(sim.GetComIdByUid(model.Id()))
		slope := &dynamics.Slope{
			ID:              int32(id),
			StartLinkOffset: int32(model.StartLinkPosition().Offset()),
			EndLinkOffset:   int32(model.EndLinkPosition().Offset()),
			DegreeTrig:      model.Degree(),
		}
		info.SlopeList = append(info.SlopeList, slope)
		startLinkId, _ := strconv.Atoi(model.StartLinkPosition().Link().Id())
		slope.StartLinkId = int32(startLinkId)
		endLinkId, _ := strconv.Atoi(model.EndLinkPosition().Link().Id())
		slope.EndLinkId = int32(endLinkId)
	}
	for _, model := range sim.Repo.SectionalCurvatureList() {
		id, _ := strconv.Atoi(sim.GetComIdByUid(model.Id()))
		curve := &dynamics.Curve{
			ID:              int32(id),
			StartLinkOffset: int32(model.StartLinkPosition().Offset()),
			EndLinkOffset:   int32(model.EndLinkPosition().Offset()),
			Curvature:       model.Radius(),
		}
		info.CurveList = append(info.CurveList, curve)
		startLinkId, _ := strconv.Atoi(model.StartLinkPosition().Link().Id())
		curve.StartLinkId = int32(startLinkId)
		endLinkId, _ := strconv.Atoi(model.EndLinkPosition().Link().Id())
		curve.EndLinkId = int32(endLinkId)
	}
	return info
}

// 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]))
	trainVobcInfo.BrakeForce = int64(binary.BigEndian.Uint16(buf[6:8]))
	trainVobcInfo.TrainLoad = int64(binary.BigEndian.Uint16(buf[8:10]))
	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
	trainVobcInfo.UpdateTime = time.Now().UnixMilli()
	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)))
}