package repo

import (
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/modelarts"
	"code.gitea.io/gitea/modules/obs"
	"code.gitea.io/gitea/modules/storage"
	"encoding/json"
	"errors"
	"github.com/unknwon/com"
	"io"
	"os"
	"path"
	"strconv"
	"strings"
	"time"

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

const (
	tplModelArtsNotebookIndex base.TplName = "repo/modelarts/notebook/index"
	tplModelArtsNotebookNew   base.TplName = "repo/modelarts/notebook/new"
	tplModelArtsNotebookShow  base.TplName = "repo/modelarts/notebook/show"

	tplModelArtsTrainJobIndex base.TplName = "repo/modelarts/trainjob/index"
	tplModelArtsTrainJobNew   base.TplName = "repo/modelarts/trainjob/new"
	tplModelArtsTrainJobShow  base.TplName = "repo/modelarts/trainjob/show"
)

// MustEnableDataset check if repository enable internal cb
func MustEnableModelArts(ctx *context.Context) {
	if !ctx.Repo.CanRead(models.UnitTypeCloudBrain) {
		ctx.NotFound("MustEnableCloudbrain", nil)
		return
	}
}

func NotebookIndex(ctx *context.Context) {
	MustEnableModelArts(ctx)
	repo := ctx.Repo.Repository
	page := ctx.QueryInt("page")
	if page <= 0 {
		page = 1
	}

	ciTasks, count, err := models.Cloudbrains(&models.CloudbrainsOptions{
		ListOptions: models.ListOptions{
			Page:     page,
			PageSize: setting.UI.IssuePagingNum,
		},
		RepoID: repo.ID,
		Type:	models.TypeCloudBrainNotebook,
	})
	if err != nil {
		ctx.ServerError("Cloudbrain", err)
		return
	}

	for i, task := range ciTasks {
		if task.Status == string(models.JobRunning) {
			ciTasks[i].CanDebug = true
		} else {
			ciTasks[i].CanDebug = false
		}
	}

	pager := context.NewPagination(int(count), setting.UI.IssuePagingNum, page, 5)
	pager.SetDefaultParams(ctx)
	ctx.Data["Page"] = pager

	ctx.Data["PageIsCloudBrain"] = true
	ctx.Data["Tasks"] = ciTasks
	ctx.HTML(200, tplModelArtsNotebookIndex)
}

func NotebookNew(ctx *context.Context) {
	ctx.Data["PageIsCloudBrain"] = true

	t := time.Now()
	var jobName = cutString(ctx.User.Name, 5) + t.Format("2006010215") + strconv.Itoa(int(t.Unix()))[5:]
	ctx.Data["job_name"] = jobName

	attachs, err := models.GetModelArtsUserAttachments(ctx.User.ID)
	if err != nil {
		ctx.ServerError("GetAllUserAttachments failed:", err)
		return
	}

	ctx.Data["attachments"] = attachs
	ctx.Data["dataset_path"] = modelarts.DataSetMountPath
	ctx.Data["env"] = modelarts.NotebookEnv
	ctx.Data["notebook_type"] = modelarts.NotebookType
	ctx.Data["flavor"] = modelarts.FlavorInfo
	ctx.HTML(200, tplModelArtsNotebookNew)
}

func NotebookCreate(ctx *context.Context, form auth.CreateModelArtsNotebookForm) {
	ctx.Data["PageIsCloudBrain"] = true
	jobName := form.JobName
	uuid := form.Attachment
	description := form.Description

	err := modelarts.GenerateTask(ctx, jobName, uuid, description)
	if err != nil {
		ctx.RenderWithErr(err.Error(), tplModelArtsNotebookNew, &form)
		return
	}

	ctx.Redirect(setting.AppSubURL + ctx.Repo.RepoLink + "/modelarts/notebook")
}

func NotebookShow(ctx *context.Context) {
	ctx.Data["PageIsCloudBrain"] = true

	var jobID = ctx.Params(":jobid")
	task, err := models.GetCloudbrainByJobID(jobID)
	if err != nil {
		ctx.Data["error"] = err.Error()
		ctx.RenderWithErr(err.Error(), tplModelArtsNotebookIndex, nil)
		return
	}

	result, err := modelarts.GetJob(jobID)
	if err != nil {
		ctx.Data["error"] = err.Error()
		ctx.RenderWithErr(err.Error(), tplModelArtsNotebookIndex, nil)
		return
	}

	if result != nil {
		task.Status = result.Status
		err = models.UpdateJob(task)
		if err != nil {
			ctx.Data["error"] = err.Error()
			ctx.RenderWithErr(err.Error(), tplModelArtsNotebookIndex, nil)
			return
		}

		createTime, _ := com.StrTo(result.CreationTimestamp).Int64()
		result.CreateTime = time.Unix(int64(createTime/1000), 0).Format("2006-01-02 15:04:05")
		endTime, _ := com.StrTo(result.LatestUpdateTimestamp).Int64()
		result.LatestUpdateTime = time.Unix(int64(endTime/1000), 0).Format("2006-01-02 15:04:05")
		result.QueuingInfo.BeginTime = time.Unix(int64(result.QueuingInfo.BeginTimestamp/1000), 0).Format("2006-01-02 15:04:05")
		result.QueuingInfo.EndTime = time.Unix(int64(result.QueuingInfo.EndTimestamp/1000), 0).Format("2006-01-02 15:04:05")
	}

	ctx.Data["task"] = task
	ctx.Data["jobID"] = jobID
	ctx.Data["result"] = result
	ctx.HTML(200, tplModelArtsNotebookShow)
}

func NotebookDebug(ctx *context.Context) {
	var jobID = ctx.Params(":jobid")
	_, err := models.GetCloudbrainByJobID(jobID)
	if err != nil {
		ctx.ServerError("GetCloudbrainByJobID failed", err)
		return
	}

	result, err := modelarts.GetJob(jobID)
	if err != nil {
		ctx.RenderWithErr(err.Error(), tplModelArtsNotebookIndex, nil)
		return
	}

	res, err := modelarts.GetJobToken(jobID)
	if err != nil {
		ctx.RenderWithErr(err.Error(), tplModelArtsNotebookIndex, nil)
		return
	}


	urls := strings.Split(result.Spec.Annotations.Url, "/")
	urlPrefix := result.Spec.Annotations.TargetDomain
	for i, url := range urls {
		if i > 2 {
			urlPrefix += "/" + url
		}
	}

	debugUrl := urlPrefix + "?token=" + res.Token
	ctx.Redirect(debugUrl)
}

func NotebookStop(ctx *context.Context) {
	var jobID = ctx.Params(":jobid")
	log.Info(jobID)
	task, err := models.GetCloudbrainByJobID(jobID)
	if err != nil {
		ctx.ServerError("GetCloudbrainByJobID failed", err)
		return
	}

	if task.Status != string(models.JobRunning) {
		log.Error("the job(%s) is not running", task.JobName)
		ctx.ServerError("the job is not running", errors.New("the job is not running"))
		return
	}

	param := models.NotebookAction{
		Action: models.ActionStop,
	}
	res, err := modelarts.StopJob(jobID, param)
	if err != nil {
		log.Error("StopJob(%s) failed:%v", task.JobName, err.Error())
		ctx.ServerError("StopJob failed", err)
		return
	}

	task.Status = res.CurrentStatus
	err = models.UpdateJob(task)
	if err != nil {
		ctx.ServerError("UpdateJob failed", err)
		return
	}

	ctx.Redirect(setting.AppSubURL + ctx.Repo.RepoLink + "/modelarts/notebook")
}

func NotebookDel(ctx *context.Context) {
	var jobID = ctx.Params(":jobid")
	task, err := models.GetCloudbrainByJobID(jobID)
	if err != nil {
		ctx.ServerError("GetCloudbrainByJobID failed", err)
		return
	}

	if task.Status != string(models.JobStopped) {
		log.Error("the job(%s) has not been stopped", task.JobName)
		ctx.ServerError("the job has not been stopped", errors.New("the job has not been stopped"))
		return
	}

	_, err = modelarts.DelJob(jobID)
	if err != nil {
		log.Error("DelJob(%s) failed:%v", task.JobName, err.Error())
		ctx.ServerError("DelJob failed", err)
		return
	}

	err = models.DeleteJob(task)
	if err != nil {
		ctx.ServerError("DeleteJob failed", err)
		return
	}

	ctx.Redirect(setting.AppSubURL + ctx.Repo.RepoLink + "/modelarts/notebook")
}

func TrainJobIndex(ctx *context.Context) {
	MustEnableModelArts(ctx)
	repo := ctx.Repo.Repository
	page := ctx.QueryInt("page")
	if page <= 0 {
		page = 1
	}

	tasks, count, err := models.Cloudbrains(&models.CloudbrainsOptions{
		ListOptions: models.ListOptions{
			Page:     page,
			PageSize: setting.UI.IssuePagingNum,
		},
		RepoID: repo.ID,
		Type:	models.TypeCloudBrainTrainJob,
	})
	if err != nil {
		ctx.ServerError("Cloudbrain", err)
		return
	}

	pager := context.NewPagination(int(count), setting.UI.IssuePagingNum, page, 5)
	pager.SetDefaultParams(ctx)
	ctx.Data["Page"] = pager

	ctx.Data["PageIsCloudBrain"] = true
	ctx.Data["Tasks"] = tasks
	ctx.HTML(200, tplModelArtsTrainJobIndex)
}

func TrainJobNew(ctx *context.Context) {
	ctx.Data["PageIsCloudBrain"] = true

	t := time.Now()
	var jobName = cutString(ctx.User.Name, 5) + t.Format("2006010215") + strconv.Itoa(int(t.Unix()))[5:]
	ctx.Data["job_name"] = jobName

	attachs, err := models.GetModelArtsUserAttachments(ctx.User.ID)
	if err != nil {
		ctx.ServerError("GetAllUserAttachments failed:", err)
		return
	}
	ctx.Data["attachments"] = attachs

	var resourcePools modelarts.ResourcePool
	if err = json.Unmarshal([]byte(modelarts.ResourcePools), &resourcePools); err != nil {
		ctx.ServerError("json.Unmarshal failed:", err)
		return
	}
	ctx.Data["resource_pools"] = resourcePools.Info

	var engines modelarts.Engine
	if err = json.Unmarshal([]byte(modelarts.Engines), &engines); err != nil {
		ctx.ServerError("json.Unmarshal failed:", err)
		return
	}
	ctx.Data["engines"] = engines.Info

	var versionInfos modelarts.VersionInfo
	if err = json.Unmarshal([]byte(modelarts.EngineVersions), &versionInfos); err != nil {
		ctx.ServerError("json.Unmarshal failed:", err)
		return
	}
	ctx.Data["engine_versions"] = versionInfos.Version

	var flavorInfos modelarts.Flavor
	if err = json.Unmarshal([]byte(modelarts.FlavorInfos), &flavorInfos); err != nil {
		ctx.ServerError("json.Unmarshal failed:", err)
		return
	}
	ctx.Data["flavor_infos"] = flavorInfos.Info

	ctx.HTML(200, tplModelArtsTrainJobNew)
}

func TrainJobCreate(ctx *context.Context, form auth.CreateModelArtsTrainJobForm) {
	ctx.Data["PageIsCloudBrain"] = true
	jobName := form.JobName
	uuid := form.Attachment
	description := form.Description
	workServerNumber := form.WorkServerNumber
	engineID := form.EngineID
	bootFile := form.BootFile
	flavorCode := form.Flavor
	poolID := form.PoolID
	isSaveParam := form.IsSaveParam
	repo := ctx.Repo.Repository
	codeLocalPath := setting.JobPath + jobName + modelarts.CodePath
	codeObsPath := "/" + setting.Bucket + modelarts.JobPath + jobName + modelarts.CodePath
	outputObsPath := "/" + setting.Bucket + modelarts.JobPath + jobName + modelarts.OutputPath
	logObsPath := "/" + setting.Bucket + modelarts.JobPath + jobName + modelarts.LogPath
	dataPath := "/" + setting.Bucket + "/" + setting.BasePath + path.Join(uuid[0:1], uuid[1:2]) + "/" + uuid + "/"

	//param check
	if err := paramCheckCreateTrainJob(form); err != nil {
		log.Error("paramCheckCreateTrainJob failed:(%v)", err)
		ctx.RenderWithErr(err.Error(), tplModelArtsTrainJobNew, &form)
		return
	}

	if err := git.Clone(repo.RepoPath(), codeLocalPath, git.CloneRepoOptions{}); err != nil {
		log.Error("Failed to clone repository: %s (%v)", repo.FullName(), err)
		ctx.RenderWithErr("Failed to clone repository", tplModelArtsTrainJobNew, &form)
		return
	}

	//todo: upload code (send to file_server todo this work?)
	if err := obsMkdir(setting.CodePathPrefix + jobName + modelarts.OutputPath); err != nil {
		log.Error("Failed to obsMkdir_output: %s (%v)", repo.FullName(), err)
		ctx.RenderWithErr("Failed to obsMkdir_output", tplModelArtsTrainJobNew, &form)
		return
	}

	if err := obsMkdir(setting.CodePathPrefix + jobName + modelarts.LogPath); err != nil {
		log.Error("Failed to obsMkdir_log: %s (%v)", repo.FullName(), err)
		ctx.RenderWithErr("Failed to obsMkdir_log", tplModelArtsTrainJobNew, &form)
		return
	}

	if err := uploadCodeToObs(codeLocalPath, jobName, ""); err != nil {
		log.Error("Failed to uploadCodeToObs: %s (%v)", repo.FullName(), err)
		ctx.RenderWithErr("Failed to uploadCodeToObs", tplModelArtsTrainJobNew, &form)
		return
	}

	if isSaveParam == "on" {
		if form.ParameterTemplateName == "" {
			log.Error("ParameterTemplateName is empty")
			ctx.RenderWithErr("保存作业参数时，作业参数名称不能为空", tplModelArtsTrainJobNew, &form)
			return
		}

		_, err := modelarts.CreateTrainJobConfig(models.CreateConfigParams{
			ConfigName:		form.ParameterTemplateName,
			Description:	form.PrameterDescription,
			DataUrl:		dataPath,
			AppUrl:			codeObsPath,
			BootFileUrl:	codeObsPath + bootFile,
			TrainUrl:		outputObsPath,
			Flavor:			models.Flavor{
				Code:		flavorCode,
			},
			WorkServerNum:	workServerNumber,
			EngineID:			int64(engineID),
			LogUrl:				logObsPath,
			PoolID:				poolID,
			Parameter:			[]models.Parameter{

			},
		})

		if err != nil {
			log.Error("Failed to CreateTrainJobConfig: %v", err)
			ctx.RenderWithErr("保存作业参数失败:" + err.Error(), tplModelArtsTrainJobNew, &form)
			return
		}
	}

	req := &modelarts.GenerateTrainJobReq{
		JobName:			jobName,
		DataUrl:			dataPath,
		Description: 		description,
		CodeObsPath:		codeObsPath,
		BootFile:			codeObsPath + bootFile,
		TrainUrl:			outputObsPath,
		FlavorCode:			flavorCode,
		WorkServerNumber:	workServerNumber,
		EngineID:			int64(engineID),
		LogUrl:				logObsPath,
		PoolID:				poolID,
	}

	err := modelarts.GenerateTrainJob(ctx, req)
	if err != nil {
		log.Error("GenerateTrainJob failed:%v", err.Error())
		ctx.RenderWithErr(err.Error(), tplModelArtsTrainJobNew, &form)
		return
	}

	ctx.Redirect(setting.AppSubURL + ctx.Repo.RepoLink + "/modelarts/train-job")
}

// readDir reads the directory named by dirname and returns
// a list of directory entries sorted by filename.
func readDir(dirname string) ([]os.FileInfo, error) {
	f, err := os.Open(dirname)
	if err != nil {
		return nil, err
	}

	list, err := f.Readdir(100)
	f.Close()
	if err != nil {
		//todo: can not upload empty folder
		if err == io.EOF {
			return nil, nil
		}
		return nil, err
	}

	//sort.Slice(list, func(i, j int) bool { return list[i].Name() < list[j].Name() })
	return list, nil
}

func uploadCodeToObs(codePath, jobName, parentDir string) error {
	files, err := readDir(codePath)
	if err != nil {
		log.Error("readDir(%s) failed: %s", codePath, err.Error())
		return err
	}

	for _, file := range files {
		if file.IsDir() {
			input := &obs.PutObjectInput{}
			input.Bucket = setting.Bucket
			input.Key = parentDir + file.Name() + "/"
			_, err = storage.ObsCli.PutObject(input)
			if err != nil {
				log.Error("PutObject(%s) failed: %s", input.Key, err.Error())
				return err
			}

			if err = uploadCodeToObs(codePath + file.Name() + "/", jobName, parentDir + file.Name() + "/"); err != nil {
				log.Error("uploadCodeToObs(%s) failed: %s", file.Name(), err.Error())
				return err
			}
		} else {
			input := &obs.PutFileInput{}
			input.Bucket = setting.Bucket
			input.Key = setting.CodePathPrefix + jobName + "/code/" + parentDir + file.Name()
			input.SourceFile = codePath + file.Name()
			_, err = storage.ObsCli.PutFile(input)
			if err != nil {
				log.Error("PutFile(%s) failed: %s", input.SourceFile, err.Error())
				return err
			}
		}
	}

	return nil
}

func obsMkdir(dir string) error {
	input := &obs.PutObjectInput{}
	input.Bucket = setting.Bucket
	input.Key = dir
	_, err := storage.ObsCli.PutObject(input)
	if err != nil {
		log.Error("PutObject(%s) failed: %s", input.Key, err.Error())
		return err
	}

	return nil
}

func paramCheckCreateTrainJob(form auth.CreateModelArtsTrainJobForm) error {
	if !strings.HasSuffix(form.BootFile, ".py") {
		log.Error("the boot file(%s) must be a python file", form.BootFile)
		return errors.New("启动文件必须是python文件")
	}

	if form.WorkServerNumber > 25 || form.WorkServerNumber < 1{
		log.Error("the WorkServerNumber(%d) must be in (1,25)", form.WorkServerNumber)
		return errors.New("计算节点数必须在1-25之间")
	}

	return nil
}