package cloudbrainTask

import (
	"fmt"
	"net/http"
	"path"
	"strings"

	"code.gitea.io/gitea/modules/notebook"

	"code.gitea.io/gitea/modules/modelarts"
	"code.gitea.io/gitea/modules/modelarts_cd"

	"code.gitea.io/gitea/modules/git"

	"code.gitea.io/gitea/modules/cloudbrain"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/redis/redis_key"
	"code.gitea.io/gitea/modules/redis/redis_lock"
	"code.gitea.io/gitea/modules/storage"
	"code.gitea.io/gitea/services/cloudbrain/resource"
	"code.gitea.io/gitea/services/reward/point/account"

	"code.gitea.io/gitea/modules/setting"
	cloudbrainService "code.gitea.io/gitea/services/cloudbrain"
	repo_service "code.gitea.io/gitea/services/repository"

	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/modules/context"
	api "code.gitea.io/gitea/modules/structs"
	"code.gitea.io/gitea/modules/util"
)

const NoteBookExtension = ".ipynb"
const CPUType = 0
const GPUType = 1
const NPUType = 2
const CharacterLength = 2550

func FileNotebookCreate(ctx *context.Context, option api.CreateFileNotebookJobOption) {

	if ctx.Written() {
		return
	}

	if path.Ext(option.File) != NoteBookExtension {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_select_wrong")))
		return
	}
	if len(getBootFile(option.File, option.OwnerName, option.ProjectName)) > CharacterLength {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_path_too_long")))
		return
	}
	if len(option.BranchName) > CharacterLength {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_branch_name_too_long")))
		return
	}

	isNotebookFileExist, _ := isNoteBookFileExist(ctx, option)
	if !isNotebookFileExist {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_file_not_exist")))
		return
	}

	sourceRepo, err := models.GetRepositoryByOwnerAndName(option.OwnerName, option.ProjectName)
	if err != nil {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_file_not_exist")))
		return
	}

	permission, err := models.GetUserRepoPermission(sourceRepo, ctx.User)
	if err != nil {
		log.Error("Get permission failed", err)
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_file_no_right")))
		return
	}

	if !permission.CanRead(models.UnitTypeCode) {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_file_no_right")))
		return
	}

	//create repo if not exist
	repo, _ := models.GetRepositoryByName(ctx.User.ID, setting.FileNoteBook.ProjectName)
	if repo == nil {
		repo, err = repo_service.CreateRepository(ctx.User, ctx.User, models.CreateRepoOptions{
			Name:          setting.FileNoteBook.ProjectName,
			Alias:         "",
			Description:   "",
			IssueLabels:   "",
			Gitignores:    "",
			License:       "",
			Readme:        "Default",
			IsPrivate:     false,
			AutoInit:      true,
			DefaultBranch: "master",
		})
		if err != nil {
			ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.failed_to_create_notebook_repo", setting.FileNoteBook.ProjectName)))
			return
		}
	} else {

		noteBook, _ := models.GetWaitOrRunFileNotebookByRepo(repo.ID, getCloudbrainType(option.Type))
		if noteBook != nil {

			if isRepoConfilcts(option, noteBook) {
				ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_repo_conflict")))
				return
			}

			if isNotebookSpecMath(option, noteBook) {
				if !isRepoMatch(option, noteBook) {
					err = downloadCode(sourceRepo, getCodePath(noteBook.JobName, sourceRepo), option.BranchName)
					if err != nil {
						log.Error("download code failed", err)
						if !strings.Contains(err.Error(), "already exists and is not an empty directory") {
							ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("cloudbrain.load_code_failed")))
							return
						}
					}
				}
				if !isRepoFileMatch(option, noteBook) {
					if len(noteBook.BootFile)+len(getBootFile(option.File, option.OwnerName, option.ProjectName))+1 <= CharacterLength {
						noteBook.BootFile += ";" + getBootFile(option.File, option.OwnerName, option.ProjectName)
					} else {
						ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_path_too_long")))
						return
					}
					if len(noteBook.BranchName)+len(option.BranchName)+1 <= CharacterLength {
						noteBook.BranchName += ";" + option.BranchName
					} else {
						ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_branch_name_too_long")))
						return
					}

					if len(noteBook.Description)+len(getDescription(option))+1 <= CharacterLength {
						noteBook.Description += ";" + getDescription(option)
					}

					err := models.UpdateJob(noteBook)
					if err != nil {
						log.Error("GenerateNotebook2 failed, %v", err, ctx.Data["MsgID"])
						ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(err.Error()))
						return
					}
				}

				ctx.JSON(http.StatusOK, models.BaseMessageApi{
					Code:    0,
					Message: noteBook.JobID,
				})
				return
			}

		}
	}

	if option.Type <= GPUType {
		cloudBrainFileNoteBookCreate(ctx, option, repo, sourceRepo)
	} else {
		modelartsFileNoteBookCreate(ctx, option, repo, sourceRepo)
	}

}
func FileNotebookStatus(ctx *context.Context, option api.CreateFileNotebookJobOption) {
	if ctx.Written() {
		return
	}

	if path.Ext(option.File) != NoteBookExtension {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_select_wrong")))
		return
	}

	isNotebookFileExist, _ := isNoteBookFileExist(ctx, option)
	if !isNotebookFileExist {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.notebook_file_not_exist")))
		return
	}

	task, err := models.GetCloudbrainByJobID(option.JobId)
	if err != nil {
		log.Error("job not found:"+option.JobId, err)
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("Job id may not be right. can not find job."))
		return
	}
	if task.BootFile == "" || task.Status != string(models.ModelArtsRunning) {
		log.Warn("Boot file is empty or status is running. ")
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("Boot file is empty or status is running."))
		return
	}
	if !isRepoFileMatch(option, task) {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("can not math repo file."))
		return
	}
	debugBaseUrl, token, err := getBaseUrlAndToken(task)
	if err != nil {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(err.Error()))
		return
	}

	if uploadNotebookFileIfCannotBroswer(debugBaseUrl, getBootFile(option.File, option.OwnerName, option.ProjectName), task, token) {
		ctx.JSON(http.StatusOK, models.BaseOKMessageApi)
	} else {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("upload failed."))

	}

}

func getBaseUrlAndToken(task *models.Cloudbrain) (string, string, error) {
	var debugBaseUrl string
	var token string
	if task.Type == models.TypeCloudBrainOne {
		debugBaseUrl = setting.DebugServerHost + "jpylab_" + task.JobID + "_" + task.SubTaskName + "/lab"

	} else {
		var result *models.GetNotebook2Result
		var err error
		if task.Type == models.TypeCloudBrainTwo {
			result, err = modelarts.GetNotebook2(task.JobID)
		} else if task.Type == models.TypeCDCenter {
			result, err = modelarts_cd.GetNotebook(task.JobID)
		}
		if err != nil || result == nil || result.Status != string(models.ModelArtsRunning) || result.Url == "" {
			log.Error("notebook job not found:"+task.JobID, err)
			return "", "", fmt.Errorf("can not get job or job is invalid.")
		}

		debugBaseUrl = result.Url
		token = result.Token

	}
	return debugBaseUrl, token, nil
}

func uploadNotebookFileIfCannotBroswer(debugBaseUrl string, bootFile string, task *models.Cloudbrain, token string) bool {
	c := &notebook.NotebookContent{
		Url:      debugBaseUrl,
		Path:     bootFile,
		PathType: "file",
		Token:    token,
	}
	if c.IsNotebookFileCanBrowser() {
		return true
	} else {
		c.SetCookiesAndCsrf()
		c.UploadNoteBookFile(task)
		return c.IsNotebookFileCanBrowser()
	}

}

func isNotebookSpecMath(option api.CreateFileNotebookJobOption, book *models.Cloudbrain) bool {
	if option.Type == NPUType || option.Type == CPUType {
		return true
	}
	spec, err := models.GetCloudbrainSpecByID(book.ID)
	if err != nil {
		log.Warn("can not get spec ", err)
		return false
	}
	return spec.AccCardsNum > 0
}

func isRepoConfilcts(option api.CreateFileNotebookJobOption, book *models.Cloudbrain) bool {
	bootFiles := strings.Split(book.BootFile, ";")
	branches := strings.Split(book.BranchName, ";")

	for i, bootFile := range bootFiles {
		splits := strings.Split(bootFile, "/")
		if len(splits) >= 3 {
			if splits[0] == option.OwnerName && splits[1] == option.ProjectName && branches[i] != option.BranchName {
				return true
			}
		}
	}

	return false

}

func isRepoMatch(option api.CreateFileNotebookJobOption, book *models.Cloudbrain) bool {
	bootFiles := strings.Split(book.BootFile, ";")

	for _, bootFile := range bootFiles {
		splits := strings.Split(bootFile, "/")
		if len(splits) >= 3 {
			if splits[0] == option.OwnerName && splits[1] == option.ProjectName {
				return true
			}
		}
	}
	return false

}

func isRepoFileMatch(option api.CreateFileNotebookJobOption, book *models.Cloudbrain) bool {
	bootFiles := strings.Split(book.BootFile, ";")
	branches := strings.Split(book.BranchName, ";")

	for i, bootFile := range bootFiles {
		if branches[i] == option.BranchName && getBootFile(option.File, option.OwnerName, option.ProjectName) == bootFile {
			return true
		}
	}

	return false

}
func UploadNotebookFiles(task *models.Cloudbrain) {
	if task.Status == string(models.JobRunning) && task.BootFile != "" {

		debugBaseUrl, token, err := getBaseUrlAndToken(task)
		if err != nil {
			log.Error("can not get base url:", err)
			return
		}
		bootFiles := strings.Split(task.BootFile, ";")

		for _, bootFile := range bootFiles {
			uploadNotebookFileIfCannotBroswer(debugBaseUrl, bootFile, task, token)
		}

	}
}

func cloudBrainFileNoteBookCreate(ctx *context.Context, option api.CreateFileNotebookJobOption, repo *models.Repository, sourceRepo *models.Repository) {

	displayJobName := cloudbrainService.GetDisplayJobName(ctx.User.Name)
	jobName := util.ConvertDisplayJobNameToJobName(displayJobName)
	jobType := string(models.JobTypeDebug)

	lock := redis_lock.NewDistributeLock(redis_key.CloudbrainBindingJobNameKey(fmt.Sprint(repo.ID), jobType, displayJobName))
	defer lock.UnLock()
	isOk, err := lock.Lock(models.CloudbrainKeyDuration)
	if !isOk {
		log.Error("lock processed failed:%v", err, ctx.Data["MsgID"])
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.cloudbrain_samejob_err")))
		return
	}

	tasks, err := models.GetCloudbrainsByDisplayJobName(repo.ID, jobType, displayJobName)
	if err == nil {
		if len(tasks) != 0 {
			log.Error("the job name did already exist", ctx.Data["MsgID"])
			ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.cloudbrain_samejob_err")))
			return
		}
	} else {
		if !models.IsErrJobNotExist(err) {
			log.Error("system error, %v", err, ctx.Data["MsgID"])
			ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("system error."))
			return
		}
	}

	count, err := GetNotFinalStatusTaskCount(ctx.User.ID, models.TypeCloudBrainOne, jobType)
	if err != nil {
		log.Error("GetCloudbrainCountByUserID failed:%v", err, ctx.Data["MsgID"])
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("system error."))
		return
	} else {
		if count >= 1 {
			log.Error("the user already has running or waiting task", ctx.Data["MsgID"])
			ctx.JSON(http.StatusOK, models.BaseMessageApi{
				Code:    2,
				Message: ctx.Tr("repo.cloudbrain.morethanonejob"),
			})
			return
		}
	}

	err = downloadCode(sourceRepo, getCodePath(jobName, sourceRepo), option.BranchName)
	if err != nil {
		log.Error("download code failed", err)
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("cloudbrain.load_code_failed")))
		return
	}
	command := cloudbrain.GetCloudbrainDebugCommand()
	specId := setting.FileNoteBook.SpecIdGPU
	if option.Type == 0 {
		specId = setting.FileNoteBook.SpecIdCPU
	}
	spec, err := resource.GetAndCheckSpec(ctx.User.ID, specId, models.FindSpecsOptions{
		JobType:         models.JobType(jobType),
		ComputeResource: models.GPU,
		Cluster:         models.OpenICluster,
		AiCenterCode:    models.AICenterOfCloudBrainOne})
	if err != nil || spec == nil {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("cloudbrain.wrong_specification")))
		return
	}

	if !account.IsPointBalanceEnough(ctx.User.ID, spec.UnitPrice) {
		log.Error("point balance is not enough,userId=%d specId=%d", ctx.User.ID, spec.ID)
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("points.insufficient_points_balance")))
		return
	}
	ctx.Repo = &context.Repository{
		Repository: repo,
	}

	req := cloudbrain.GenerateCloudBrainTaskReq{
		Ctx:                  ctx,
		DisplayJobName:       displayJobName,
		JobName:              jobName,
		Image:                setting.FileNoteBook.ImageGPU,
		Command:              command,
		Uuids:                "",
		DatasetNames:         "",
		DatasetInfos:         nil,
		CodePath:             storage.GetMinioPath(jobName, cloudbrain.CodeMountPath+"/"),
		ModelPath:            storage.GetMinioPath(jobName, cloudbrain.ModelMountPath+"/"),
		BenchmarkPath:        storage.GetMinioPath(jobName, cloudbrain.BenchMarkMountPath+"/"),
		Snn4ImageNetPath:     storage.GetMinioPath(jobName, cloudbrain.Snn4imagenetMountPath+"/"),
		BrainScorePath:       storage.GetMinioPath(jobName, cloudbrain.BrainScoreMountPath+"/"),
		JobType:              jobType,
		Description:          getDescription(option),
		BranchName:           option.BranchName,
		BootFile:             getBootFile(option.File, option.OwnerName, option.ProjectName),
		Params:               "{\"parameter\":[]}",
		CommitID:             "",
		BenchmarkTypeID:      0,
		BenchmarkChildTypeID: 0,
		ResultPath:           storage.GetMinioPath(jobName, cloudbrain.ResultPath+"/"),
		Spec:                 spec,
	}

	jobId, err := cloudbrain.GenerateTask(req)
	if err != nil {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(err.Error()))
		return
	}
	ctx.JSON(http.StatusOK, models.BaseMessageApi{
		Code:    0,
		Message: jobId,
	})

}

func getCloudbrainType(optionType int) int {
	if optionType <= GPUType {
		return models.TypeCloudBrainOne
	}
	if setting.ModelartsCD.Enabled {
		return models.TypeCDCenter
	}
	return models.TypeCloudBrainTwo
}

func getCodePath(jobName string, repo *models.Repository) string {
	return setting.JobPath + jobName + cloudbrain.CodeMountPath + "/" + repo.OwnerName + "/" + repo.Name
}

func getDescription(option api.CreateFileNotebookJobOption) string {
	des := option.OwnerName + "/" + option.ProjectName + "/" + option.File
	if len(des) <= CharacterLength {
		return des
	}
	return ""
}

func modelartsFileNoteBookCreate(ctx *context.Context, option api.CreateFileNotebookJobOption, repo *models.Repository, sourceRepo *models.Repository) {
	displayJobName := cloudbrainService.GetDisplayJobName(ctx.User.Name)
	jobName := util.ConvertDisplayJobNameToJobName(displayJobName)

	lock := redis_lock.NewDistributeLock(redis_key.CloudbrainBindingJobNameKey(fmt.Sprint(repo.ID), string(models.JobTypeDebug), displayJobName))
	isOk, err := lock.Lock(models.CloudbrainKeyDuration)
	if !isOk {
		log.Error("lock processed failed:%v", err, ctx.Data["MsgID"])
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.cloudbrain_samejob_err")))
		return
	}
	defer lock.UnLock()

	count, err := GetNotFinalStatusTaskCount(ctx.User.ID, models.TypeCloudBrainTwo, string(models.JobTypeDebug))

	if err != nil {
		log.Error("GetCloudbrainNotebookCountByUserID failed:%v", err, ctx.Data["MsgID"])

		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("system error."))
		return
	} else {
		if count >= 1 {
			log.Error("the user already has running or waiting task", ctx.Data["MsgID"])
			ctx.JSON(http.StatusOK, models.BaseMessageApi{
				Code:    2,
				Message: ctx.Tr("repo.cloudbrain.morethanonejob"),
			})
			return
		}
	}

	tasks, err := models.GetCloudbrainsByDisplayJobName(repo.ID, string(models.JobTypeDebug), displayJobName)
	if err == nil {
		if len(tasks) != 0 {
			log.Error("the job name did already exist", ctx.Data["MsgID"])
			ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("repo.cloudbrain_samejob_err")))
			return
		}
	} else {
		if !models.IsErrJobNotExist(err) {
			log.Error("system error, %v", err, ctx.Data["MsgID"])
			ctx.JSON(http.StatusOK, models.BaseErrorMessageApi("system error."))
			return
		}
	}

	err = downloadCode(sourceRepo, getCodePath(jobName, sourceRepo), option.BranchName)
	if err != nil {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("cloudbrain.load_code_failed")))
		return
	}

	var aiCenterCode = models.AICenterOfCloudBrainTwo
	var specId = setting.FileNoteBook.SpecIdNPU
	if setting.ModelartsCD.Enabled {
		aiCenterCode = models.AICenterOfChengdu
		specId = setting.FileNoteBook.SpecIdNPUCD
	}
	spec, err := resource.GetAndCheckSpec(ctx.User.ID, specId, models.FindSpecsOptions{
		JobType:         models.JobTypeDebug,
		ComputeResource: models.NPU,
		Cluster:         models.OpenICluster,
		AiCenterCode:    aiCenterCode})
	if err != nil || spec == nil {
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("cloudbrain.wrong_specification")))
		return
	}
	if !account.IsPointBalanceEnough(ctx.User.ID, spec.UnitPrice) {
		log.Error("point balance is not enough,userId=%d specId=%d ", ctx.User.ID, spec.ID)
		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(ctx.Tr("points.insufficient_points_balance")))
		return
	}
	ctx.Repo = &context.Repository{
		Repository: repo,
	}

	var jobId string
	req := cloudbrain.GenerateModelArtsNotebookReq{
		DisplayJobName:     displayJobName,
		JobName:            jobName,
		Description:        getDescription(option),
		ImageId:            setting.FileNoteBook.ImageIdNPU,
		Spec:               spec,
		BootFile:           getBootFile(option.File, option.OwnerName, option.ProjectName),
		AutoStopDurationMs: modelarts.AutoStopDurationMs / 4,
		BranchName:         option.BranchName,
	}

	if setting.ModelartsCD.Enabled {
		req.ImageId = setting.FileNoteBook.ImageIdNPUCD
		jobId, err = modelarts_cd.GenerateNotebook(ctx, req)
	} else {
		jobId, err = modelarts.GenerateNotebook2(ctx, req)
	}

	if err != nil {
		log.Error("GenerateNotebook2 failed, %v", err, ctx.Data["MsgID"])

		ctx.JSON(http.StatusOK, models.BaseErrorMessageApi(err.Error()))

		return
	}

	ctx.JSON(http.StatusOK, models.BaseMessageApi{
		Code:    0,
		Message: jobId,
	})

}

func isNoteBookFileExist(ctx *context.Context, option api.CreateFileNotebookJobOption) (bool, error) {
	repoPathOfNoteBook := models.RepoPath(option.OwnerName, option.ProjectName)

	gitRepoOfNoteBook, err := git.OpenRepository(repoPathOfNoteBook)
	if err != nil {
		log.Error("RepoRef Invalid repo "+repoPathOfNoteBook, err.Error())
		return false, err
	}
	// We opened it, we should close it
	defer func() {
		// If it's been set to nil then assume someone else has closed it.
		if gitRepoOfNoteBook != nil {
			gitRepoOfNoteBook.Close()
		}
	}()
	fileExist, err := fileExists(gitRepoOfNoteBook, option.File, option.BranchName)
	if err != nil || !fileExist {
		log.Error("Get file error:", err, ctx.Data["MsgID"])

		return false, err
	}
	return true, nil
}

func getBootFile(filePath string, ownerName string, projectName string) string {
	return ownerName + "/" + projectName + "/" + filePath
}

func fileExists(gitRepo *git.Repository, path string, branch string) (bool, error) {

	commit, err := gitRepo.GetBranchCommit(branch)
	if err != nil {
		return false, err
	}
	if _, err := commit.GetTreeEntryByPath(path); err != nil {
		return false, err
	}
	return true, nil
}