package cloudbrain

import (
	"encoding/json"
	"errors"
	"os"
	"strconv"

	"code.gitea.io/gitea/modules/timeutil"

	"code.gitea.io/gitea/modules/storage"

	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/modules/context"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/notification"
	"code.gitea.io/gitea/modules/setting"
)

const (
	//Command = `pip3 install jupyterlab==2.2.5 -i https://pypi.tuna.tsinghua.edu.cn/simple;service ssh stop;jupyter lab --no-browser --ip=0.0.0.0 --allow-root --notebook-dir="/code" --port=80 --LabApp.token="" --LabApp.allow_origin="self https://cloudbrain.pcl.ac.cn"`
	//CommandBenchmark      = `echo "start benchmark";python /code/test.py;echo "end benchmark"`
	CommandBenchmark      = `echo "start benchmark";cd /benchmark && bash run_bk.sh;echo "end benchmark"`
	CodeMountPath         = "/code"
	DataSetMountPath      = "/dataset"
	ModelMountPath        = "/model"
	LogFile               = "log.txt"
	BenchMarkMountPath    = "/benchmark"
	BenchMarkResourceID   = 1
	Snn4imagenetMountPath = "/snn4imagenet"
	BrainScoreMountPath   = "/brainscore"
	TaskInfoName          = "/taskInfo"
	Snn4imagenetCommand   = `/opt/conda/bin/python /snn4imagenet/testSNN_script.py --modelname '%s' --modelpath '/dataset' --modeldescription '%s'`
	BrainScoreCommand     = `bash /brainscore/brainscore_test_par4shSrcipt.sh -b '%s' -n '%s' -p '/dataset' -d '%s'`

	SubTaskName = "task1"

	Success = "S000"

	DefaultBranchName = "master"

	ResultPath = "/result"
)

var (
	ResourceSpecs          *models.ResourceSpecs
	TrainResourceSpecs     *models.ResourceSpecs
	InferenceResourceSpecs *models.ResourceSpecs
	SpecialPools           *models.SpecialPools
)

type GenerateCloudBrainTaskReq struct {
	Ctx                  *context.Context
	DisplayJobName       string
	JobName              string
	Image                string
	Command              string
	CodePath             string
	ModelPath            string
	BenchmarkPath        string
	Snn4ImageNetPath     string
	BrainScorePath       string
	JobType              string
	GpuQueue             string
	Description          string
	BranchName           string
	BootFile             string
	Params               string
	CommitID             string
	Uuids                string
	DatasetNames         string
	DatasetInfos         map[string]models.DatasetInfo
	BenchmarkTypeID      int
	BenchmarkChildTypeID int
	ResourceSpecId       int
	ResultPath           string
	TrainUrl             string
	ModelName            string
	ModelVersion         string
	CkptName             string
	LabelName            string
}

func GetCloudbrainDebugCommand() string {
	var command = `pip3 install jupyterlab==3 -i https://pypi.tuna.tsinghua.edu.cn/simple;service ssh stop;jupyter lab --ServerApp.shutdown_no_activity_timeout=` + setting.CullIdleTimeout + ` --TerminalManager.cull_inactive_timeout=` + setting.CullIdleTimeout + ` --TerminalManager.cull_interval=` + setting.CullInterval + ` --MappingKernelManager.cull_idle_timeout=` + setting.CullIdleTimeout + ` --MappingKernelManager.cull_interval=` + setting.CullInterval + ` --MappingKernelManager.cull_connected=True --MappingKernelManager.cull_busy=True --no-browser --ip=0.0.0.0 --allow-root --notebook-dir="/code" --port=80 --ServerApp.token="" --ServerApp.allow_origin="self https://cloudbrain.pcl.ac.cn" `
	return command
}

func isAdminOrOwnerOrJobCreater(ctx *context.Context, job *models.Cloudbrain, err error) bool {
	if !ctx.IsSigned {
		return false
	}
	if err != nil {

		return ctx.IsUserRepoOwner() || ctx.IsUserSiteAdmin()
	} else {
		return ctx.IsUserRepoOwner() || ctx.IsUserSiteAdmin() || ctx.User.ID == job.UserID
	}

}

func CanDeleteJob(ctx *context.Context, job *models.Cloudbrain) bool {

	return isAdminOrOwnerOrJobCreater(ctx, job, nil)
}

func CanCreateOrDebugJob(ctx *context.Context) bool {
	if !ctx.IsSigned {
		return false
	}
	return ctx.Repo.CanWrite(models.UnitTypeCloudBrain)
}

func CanModifyJob(ctx *context.Context, job *models.Cloudbrain) bool {

	return isAdminOrJobCreater(ctx, job, nil)
}

func isAdminOrJobCreater(ctx *context.Context, job *models.Cloudbrain, err error) bool {
	if !ctx.IsSigned {
		return false
	}
	if err != nil {
		return ctx.IsUserSiteAdmin()
	} else {
		return ctx.IsUserSiteAdmin() || ctx.User.ID == job.UserID
	}

}

func isAdminOrImageCreater(ctx *context.Context, image *models.Image, err error) bool {
	if !ctx.IsSigned {
		return false
	}
	if err != nil {
		return ctx.IsUserSiteAdmin()
	} else {
		return ctx.IsUserSiteAdmin() || ctx.User.ID == image.UID
	}

}

func AdminOrOwnerOrJobCreaterRight(ctx *context.Context) {

	var id = ctx.Params(":id")
	job, err := models.GetCloudbrainByID(id)
	if err != nil {
		log.Error("GetCloudbrainByID failed:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}
	ctx.Cloudbrain = job
	if !isAdminOrOwnerOrJobCreater(ctx, job, err) {
		log.Error("!isAdminOrOwnerOrJobCreater error:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}

}

func AdminOrJobCreaterRight(ctx *context.Context) {

	var id = ctx.Params(":id")
	job, err := models.GetCloudbrainByID(id)
	if err != nil {
		log.Error("GetCloudbrainByID failed:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}
	ctx.Cloudbrain = job
	if !isAdminOrJobCreater(ctx, job, err) {
		log.Error("!isAdminOrJobCreater error:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}

}

func AdminOrOwnerOrJobCreaterRightForTrain(ctx *context.Context) {

	var jobID = ctx.Params(":jobid")
	job, err := models.GetCloudbrainByJobID(jobID)
	if err != nil {
		log.Error("GetCloudbrainByJobID failed:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}
	ctx.Cloudbrain = job
	if !isAdminOrOwnerOrJobCreater(ctx, job, err) {
		log.Error("!isAdminOrOwnerOrJobCreater failed:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}

}

func AdminOrJobCreaterRightForTrain(ctx *context.Context) {

	var jobID = ctx.Params(":jobid")
	job, err := models.GetCloudbrainByJobID(jobID)
	if err != nil {
		log.Error("GetCloudbrainByJobID failed:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}
	ctx.Cloudbrain = job
	if !isAdminOrJobCreater(ctx, job, err) {
		log.Error("!isAdminOrJobCreater errot:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}

}

func AdminOrImageCreaterRight(ctx *context.Context) {

	id, err := strconv.ParseInt(ctx.Params(":id"), 10, 64)
	var image *models.Image
	if err != nil {
		log.Error("Get Image by ID failed:%v", err.Error())

	} else {
		image, err = models.GetImageByID(id)
		if err != nil {
			log.Error("Get Image by ID failed:%v", err.Error())
			return
		}
	}

	if !isAdminOrImageCreater(ctx, image, err) {
		log.Error("!isAdminOrImageCreater error:%v", err.Error())
		ctx.NotFound(ctx.Req.URL.RequestURI(), nil)
	}

}

func GenerateTask(req GenerateCloudBrainTaskReq) error {
	var resourceSpec *models.ResourceSpec
	var versionCount int
	if req.JobType == string(models.JobTypeTrain) {
		versionCount = 1
		if TrainResourceSpecs == nil {
			json.Unmarshal([]byte(setting.TrainResourceSpecs), &TrainResourceSpecs)
		}
		for _, spec := range TrainResourceSpecs.ResourceSpec {
			if req.ResourceSpecId == spec.Id {
				resourceSpec = spec
				break
			}
		}
	} else if req.JobType == string(models.JobTypeInference) {
		if InferenceResourceSpecs == nil {
			json.Unmarshal([]byte(setting.InferenceResourceSpecs), &InferenceResourceSpecs)
		}
		for _, spec := range InferenceResourceSpecs.ResourceSpec {
			if req.ResourceSpecId == spec.Id {
				resourceSpec = spec
				break
			}
		}

	} else {
		if ResourceSpecs == nil {
			json.Unmarshal([]byte(setting.ResourceSpecs), &ResourceSpecs)
		}
		for _, spec := range ResourceSpecs.ResourceSpec {
			if req.ResourceSpecId == spec.Id {
				resourceSpec = spec
				break
			}
		}

	}
	//如果没有匹配到spec信息，尝试从专属资源池获取
	if resourceSpec == nil && SpecialPools != nil {
		resourceSpec = geMatchResourceSpec(req.JobType, req.GpuQueue, req.ResourceSpecId)
	}

	if resourceSpec == nil {
		log.Error("no such resourceSpecId(%d)", req.ResourceSpecId, req.Ctx.Data["MsgID"])
		return errors.New("no such resourceSpec")
	}

	volumes := []models.Volume{
		{
			HostPath: models.StHostPath{
				Path:      req.CodePath,
				MountPath: CodeMountPath,
				ReadOnly:  false,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      req.ModelPath,
				MountPath: ModelMountPath,
				ReadOnly:  false,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      req.BenchmarkPath,
				MountPath: BenchMarkMountPath,
				ReadOnly:  true,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      req.Snn4ImageNetPath,
				MountPath: Snn4imagenetMountPath,
				ReadOnly:  true,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      req.BrainScorePath,
				MountPath: BrainScoreMountPath,
				ReadOnly:  true,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      req.ResultPath,
				MountPath: ResultPath,
				ReadOnly:  false,
			},
		},
	}

	if len(req.DatasetInfos) == 1 {
		volumes = append(volumes, models.Volume{
			HostPath: models.StHostPath{
				Path:      req.DatasetInfos[req.Uuids].DataLocalPath,
				MountPath: DataSetMountPath,
				ReadOnly:  true,
			},
		})
	} else if len(req.DatasetInfos) > 1 {
		for _, dataset := range req.DatasetInfos {
			volumes = append(volumes, models.Volume{
				HostPath: models.StHostPath{
					Path:      dataset.DataLocalPath,
					MountPath: DataSetMountPath + "/" + dataset.Name,
					ReadOnly:  true,
				},
			})
		}
	}

	createTime := timeutil.TimeStampNow()
	jobResult, err := CreateJob(req.JobName, models.CreateJobParams{
		JobName:    req.JobName,
		RetryCount: 1,
		GpuType:    req.GpuQueue,
		Image:      req.Image,
		TaskRoles: []models.TaskRole{
			{
				Name:                  SubTaskName,
				TaskNumber:            1,
				MinSucceededTaskCount: 1,
				MinFailedTaskCount:    1,
				CPUNumber:             resourceSpec.CpuNum,
				GPUNumber:             resourceSpec.GpuNum,
				MemoryMB:              resourceSpec.MemMiB,
				ShmMB:                 resourceSpec.ShareMemMiB,
				Command:               req.Command,
				NeedIBDevice:          false,
				IsMainRole:            false,
				UseNNI:                false,
			},
		},
		Volumes: volumes,
	})
	if err != nil {
		log.Error("CreateJob failed:", err.Error(), req.Ctx.Data["MsgID"])
		return err
	}
	if jobResult.Code != Success {
		log.Error("CreateJob(%s) failed:%s", req.JobName, jobResult.Msg, req.Ctx.Data["MsgID"])
		return errors.New(jobResult.Msg)
	}

	var jobID = jobResult.Payload["jobId"].(string)
	err = models.CreateCloudbrain(&models.Cloudbrain{
		Status:               string(models.JobWaiting),
		UserID:               req.Ctx.User.ID,
		RepoID:               req.Ctx.Repo.Repository.ID,
		JobID:                jobID,
		JobName:              req.JobName,
		DisplayJobName:       req.DisplayJobName,
		SubTaskName:          SubTaskName,
		JobType:              req.JobType,
		Type:                 models.TypeCloudBrainOne,
		Uuid:                 req.Uuids,
		Image:                req.Image,
		GpuQueue:             req.GpuQueue,
		ResourceSpecId:       req.ResourceSpecId,
		ComputeResource:      models.GPUResource,
		BenchmarkTypeID:      req.BenchmarkTypeID,
		BenchmarkChildTypeID: req.BenchmarkChildTypeID,
		Description:          req.Description,
		IsLatestVersion:      "1",
		VersionCount:         versionCount,
		BranchName:           req.BranchName,
		BootFile:             req.BootFile,
		DatasetName:          req.DatasetNames,
		Parameters:           req.Params,
		TrainUrl:             req.TrainUrl,
		ModelName:            req.ModelName,
		ModelVersion:         req.ModelVersion,
		CkptName:             req.CkptName,
		ResultUrl:            req.ResultPath,
		LabelName:            req.LabelName,
		CreatedUnix:          createTime,
		UpdatedUnix:          createTime,
		CommitID:             req.CommitID,
	})

	if err != nil {
		return err
	}

	task, err := models.GetCloudbrainByJobID(jobID)
	if err != nil {
		log.Error("GetCloudbrainByJobID failed: %v", err.Error())
		return err
	}
	stringId := strconv.FormatInt(task.ID, 10)

	if IsBenchmarkJob(req.JobType) {
		notification.NotifyOtherTask(req.Ctx.User, req.Ctx.Repo.Repository, stringId, req.DisplayJobName, models.ActionCreateBenchMarkTask)
	} else if string(models.JobTypeTrain) == req.JobType {
		notification.NotifyOtherTask(req.Ctx.User, req.Ctx.Repo.Repository, jobID, req.DisplayJobName, models.ActionCreateGPUTrainTask)
	} else if string(models.JobTypeInference) == req.JobType {
		notification.NotifyOtherTask(req.Ctx.User, req.Ctx.Repo.Repository, jobID, req.DisplayJobName, models.ActionCreateInferenceTask)
	} else {
		notification.NotifyOtherTask(req.Ctx.User, req.Ctx.Repo.Repository, stringId, req.DisplayJobName, models.ActionCreateDebugGPUTask)
	}

	return nil
}

func IsBenchmarkJob(jobType string) bool {
	return string(models.JobTypeBenchmark) == jobType || string(models.JobTypeBrainScore) == jobType || string(models.JobTypeSnn4imagenet) == jobType
}

func GetWaitingCloudbrainCount(cloudbrainType int, computeResource string, jobTypes ...models.JobType) int64 {
	num, err := models.GetWaitingCloudbrainCount(cloudbrainType, computeResource, jobTypes...)
	if err != nil {
		log.Warn("Get waiting count err", err)
		num = 0
	}
	return num
}

func RestartTask(ctx *context.Context, task *models.Cloudbrain, newID *string) error {
	jobName := task.JobName

	var resourceSpec *models.ResourceSpec
	if ResourceSpecs == nil {
		json.Unmarshal([]byte(setting.ResourceSpecs), &ResourceSpecs)
	}
	for _, spec := range ResourceSpecs.ResourceSpec {
		if task.ResourceSpecId == spec.Id {
			resourceSpec = spec
		}
	}

	//如果没有匹配到spec信息，尝试从专属资源池获取
	if resourceSpec == nil && SpecialPools != nil {
		resourceSpec = geMatchResourceSpec(task.JobType, task.GpuQueue, task.ResourceSpecId)
	}

	if resourceSpec == nil {
		log.Error("no such resourceSpecId(%d)", task.ResourceSpecId, ctx.Data["MsgID"])
		return errors.New("no such resourceSpec")
	}
	var datasetInfos map[string]models.DatasetInfo
	if task.Uuid != "" {
		var err error
		datasetInfos, _, err = models.GetDatasetInfo(task.Uuid)
		if err != nil {
			log.Error("GetDatasetInfo failed:%v", err, ctx.Data["MsgID"])
			return err
		}
	}

	volumes := []models.Volume{
		{
			HostPath: models.StHostPath{
				Path:      storage.GetMinioPath(jobName, CodeMountPath+"/"),
				MountPath: CodeMountPath,
				ReadOnly:  false,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      storage.GetMinioPath(jobName, ModelMountPath+"/"),
				MountPath: ModelMountPath,
				ReadOnly:  false,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      storage.GetMinioPath(jobName, BenchMarkMountPath+"/"),
				MountPath: BenchMarkMountPath,
				ReadOnly:  true,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      storage.GetMinioPath(jobName, Snn4imagenetMountPath+"/"),
				MountPath: Snn4imagenetMountPath,
				ReadOnly:  true,
			},
		},
		{
			HostPath: models.StHostPath{
				Path:      storage.GetMinioPath(jobName, BrainScoreMountPath+"/"),
				MountPath: BrainScoreMountPath,
				ReadOnly:  true,
			},
		},
	}
	if datasetInfos != nil {
		if len(datasetInfos) == 1 {
			volumes = append(volumes, models.Volume{
				HostPath: models.StHostPath{
					Path:      datasetInfos[task.Uuid].DataLocalPath,
					MountPath: DataSetMountPath,
					ReadOnly:  true,
				},
			})
		} else {
			for _, dataset := range datasetInfos {
				volumes = append(volumes, models.Volume{
					HostPath: models.StHostPath{
						Path:      dataset.DataLocalPath,
						MountPath: DataSetMountPath + "/" + dataset.Name,
						ReadOnly:  true,
					},
				})
			}
		}
	}

	createTime := timeutil.TimeStampNow()
	jobResult, err := CreateJob(jobName, models.CreateJobParams{
		JobName:    jobName,
		RetryCount: 1,
		GpuType:    task.GpuQueue,
		Image:      task.Image,
		TaskRoles: []models.TaskRole{
			{
				Name:                  SubTaskName,
				TaskNumber:            1,
				MinSucceededTaskCount: 1,
				MinFailedTaskCount:    1,
				CPUNumber:             resourceSpec.CpuNum,
				GPUNumber:             resourceSpec.GpuNum,
				MemoryMB:              resourceSpec.MemMiB,
				ShmMB:                 resourceSpec.ShareMemMiB,
				Command:               GetCloudbrainDebugCommand(), //Command,
				NeedIBDevice:          false,
				IsMainRole:            false,
				UseNNI:                false,
			},
		},
		Volumes: volumes,
	})
	if err != nil {
		log.Error("CreateJob failed:%v", err.Error(), ctx.Data["MsgID"])
		return err
	}
	if jobResult.Code != Success {
		log.Error("CreateJob(%s) failed:%s", jobName, jobResult.Msg, ctx.Data["MsgID"])
		return errors.New(jobResult.Msg)
	}

	var jobID = jobResult.Payload["jobId"].(string)
	newTask := &models.Cloudbrain{
		Status:          string(models.JobWaiting),
		UserID:          task.UserID,
		RepoID:          task.RepoID,
		JobID:           jobID,
		JobName:         task.JobName,
		DisplayJobName:  task.DisplayJobName,
		SubTaskName:     task.SubTaskName,
		JobType:         task.JobType,
		Type:            task.Type,
		Uuid:            task.Uuid,
		DatasetName:     task.DatasetName,
		Image:           task.Image,
		GpuQueue:        task.GpuQueue,
		ResourceSpecId:  task.ResourceSpecId,
		ComputeResource: task.ComputeResource,
		CreatedUnix:     createTime,
		UpdatedUnix:     createTime,
		BranchName:      task.BranchName,
	}

	err = models.RestartCloudbrain(task, newTask)
	if err != nil {
		log.Error("RestartCloudbrain(%s) failed:%v", jobName, err.Error(), ctx.Data["MsgID"])
		return err
	}

	stringId := strconv.FormatInt(newTask.ID, 10)
	*newID = stringId

	notification.NotifyOtherTask(ctx.User, ctx.Repo.Repository, stringId, task.DisplayJobName, models.ActionCreateDebugGPUTask)

	return nil
}

func geMatchResourceSpec(jobType string, gpuQueue string, resourceSpecId int) *models.ResourceSpec {

	for _, specialPool := range SpecialPools.Pools {

		if specialPool.ResourceSpec != nil {
			if IsElementExist(specialPool.JobType, jobType) && IsQueueInSpecialtPool(specialPool.Pool, gpuQueue) {
				for _, spec := range specialPool.ResourceSpec {
					if resourceSpecId == spec.Id {
						return spec
					}
				}
			}
		}
	}
	return nil
}

func DelCloudBrainJob(jobId string) string {
	task, err := models.GetCloudbrainByJobID(jobId)
	if err != nil {
		log.Error("get cloud brain err:", err)
		return "cloudbrain.Delete_failed"

	}
	if task.Status != string(models.JobStopped) && task.Status != string(models.JobFailed) && task.Status != string(models.JobSucceeded) {
		log.Error("the job(%s) has not been stopped", task.JobName)
		return "cloudbrain.Not_Stopped"
	}

	err = models.DeleteJob(task)
	if err != nil {
		log.Error("DeleteJob failed:", err)
		return "cloudbrain.Delete_failed"
	}

	deleteJobStorage(task.JobName)

	return ""
}

func deleteJobStorage(jobName string) error {
	//delete local
	localJobPath := setting.JobPath + jobName
	err := os.RemoveAll(localJobPath)
	if err != nil {
		log.Error("RemoveAll(%s) failed:%v", localJobPath, err)
	}

	dirPath := setting.CBCodePathPrefix + jobName + "/"
	err = storage.Attachments.DeleteDir(dirPath)
	if err != nil {
		log.Error("DeleteDir(%s) failed:%v", localJobPath, err)
	}

	return nil
}

func InitSpecialPool() {
	if SpecialPools == nil && setting.SpecialPools != "" {
		json.Unmarshal([]byte(setting.SpecialPools), &SpecialPools)
	}
}

func IsResourceSpecInSpecialPool(resourceSpecs []*models.ResourceSpec, resourceSpecId int) bool {
	if resourceSpecs == nil || len(resourceSpecs) == 0 {
		return true
	}
	for _, v := range resourceSpecs {
		if v.Id == resourceSpecId {
			return true
		}
	}
	return false
}

func IsQueueInSpecialtPool(pool []*models.GpuInfo, queue string) bool {
	for _, v := range pool {
		if v.Queue == queue {
			return true
		}
	}
	return false
}

func IsElementExist(s []string, str string) bool {
	for _, v := range s {
		if v == str {
			return true
		}
	}
	return false
}