// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package repo

import (
	contexExt "context"
	"encoding/json"
	"errors"
	"fmt"
	"mime/multipart"
	"net/http"
	"path"
	"strconv"
	"strings"

	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/modules/context"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/minio_ext"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/storage"
	"code.gitea.io/gitea/modules/upload"
	"code.gitea.io/gitea/modules/worker"

	gouuid "github.com/satori/go.uuid"
)

const (
	//result of decompress
	DecompressSuccess = "0"
	DecompressFailed  = "1"
)

type CloudBrainDataset struct {
	UUID       string `json:"id"`
	Name       string `json:"name"`
	Path       string `json:"place"`
	UserName   string `json:"provider"`
	CreateTime string `json:"created_at"`
}

type UploadForm struct {
	UploadID      	string                	`form:"uploadId"`
	UuID      	  	string                	`form:"uuid"`
	PartSize	  	int64					`form:"size"`
	Offset			int64					`form:"offset"`
	PartNumber	  	int						`form:"chunkNumber"`
	PartFile 		multipart.File			`form:"file"`
}

func RenderAttachmentSettings(ctx *context.Context) {
	renderAttachmentSettings(ctx)
}

func renderAttachmentSettings(ctx *context.Context) {
	ctx.Data["IsAttachmentEnabled"] = setting.Attachment.Enabled
	ctx.Data["AttachmentStoreType"] = setting.Attachment.StoreType
	ctx.Data["AttachmentAllowedTypes"] = setting.Attachment.AllowedTypes
	ctx.Data["AttachmentMaxSize"] = setting.Attachment.MaxSize
	ctx.Data["AttachmentMaxFiles"] = setting.Attachment.MaxFiles
}

// UploadAttachment response for uploading issue's attachment
func UploadAttachment(ctx *context.Context) {
	if !setting.Attachment.Enabled {
		ctx.Error(404, "attachment is not enabled")
		return
	}

	file, header, err := ctx.Req.FormFile("file")
	if err != nil {
		ctx.Error(500, fmt.Sprintf("FormFile: %v", err))
		return
	}
	defer file.Close()

	buf := make([]byte, 1024)
	n, _ := file.Read(buf)
	if n > 0 {
		buf = buf[:n]
	}

	err = upload.VerifyAllowedContentType(buf, strings.Split(setting.Attachment.AllowedTypes, ","))
	if err != nil {
		ctx.Error(400, err.Error())
		return
	}

	datasetID, _ := strconv.ParseInt(ctx.Req.FormValue("dataset_id"), 10, 64)

	attach, err := models.NewAttachment(&models.Attachment{
		IsPrivate:  true,
		UploaderID: ctx.User.ID,
		Name:       header.Filename,
		DatasetID:  datasetID,
	}, buf, file)
	if err != nil {
		ctx.Error(500, fmt.Sprintf("NewAttachment: %v", err))
		return
	}

	log.Trace("New attachment uploaded: %s", attach.UUID)
	ctx.JSON(200, map[string]string{
		"uuid": attach.UUID,
	})
}

func UpdatePublicAttachment(ctx *context.Context) {
	file := ctx.Query("file")
	isPrivate, _ := strconv.ParseBool(ctx.Query("is_private"))
	attach, err := models.GetAttachmentByUUID(file)
	if err != nil {
		ctx.Error(404, err.Error())
		return
	}
	attach.IsPrivate = isPrivate
	models.UpdateAttachment(attach)
}

// DeleteAttachment response for deleting issue's attachment
func DeleteAttachment(ctx *context.Context) {
	file := ctx.Query("file")
	attach, err := models.GetAttachmentByUUID(file)
	if err != nil {
		ctx.Error(400, err.Error())
		return
	}
	if !ctx.IsSigned || (ctx.User.ID != attach.UploaderID) {
		ctx.Error(403)
		return
	}
	err = models.DeleteAttachment(attach, false)
	if err != nil {
		ctx.Error(500, fmt.Sprintf("DeleteAttachment: %v", err))
		return
	}
	ctx.JSON(200, map[string]string{
		"uuid": attach.UUID,
	})
}

// GetAttachment serve attachements
func GetAttachment(ctx *context.Context) {
	typeCloudBrain := ctx.QueryInt("type")
	err := checkTypeCloudBrain(typeCloudBrain)
	if err != nil {
		ctx.ServerError("checkTypeCloudBrain failed", err)
		return
	}

	attach, err := models.GetAttachmentByUUID(ctx.Params(":uuid"))
	if err != nil {
		if models.IsErrAttachmentNotExist(err) {
			ctx.Error(404)
		} else {
			ctx.ServerError("GetAttachmentByUUID", err)
		}
		return
	}

	repository, unitType, err := attach.LinkedRepository()
	if err != nil {
		ctx.ServerError("LinkedRepository", err)
		return
	}

	if repository == nil { //If not linked
		if !(ctx.IsSigned && attach.UploaderID == ctx.User.ID) && attach.IsPrivate { //We block if not the uploader
			ctx.Error(http.StatusNotFound)
			return
		}
	} else { //If we have the repository we check access
		perm, err := models.GetUserRepoPermission(repository, ctx.User)
		if err != nil {
			ctx.Error(http.StatusInternalServerError, "GetUserRepoPermission", err.Error())
			return
		}
		if !perm.CanRead(unitType) {
			ctx.Error(http.StatusNotFound)
			return
		}
	}

	dataSet, err := attach.LinkedDataSet()
	if err != nil {
		ctx.ServerError("LinkedDataSet", err)
		return
	}

	if dataSet != nil {
		isPermit, err := models.GetUserDataSetPermission(dataSet, ctx.User)
		if err != nil {
			ctx.Error(http.StatusInternalServerError, "GetUserDataSetPermission", err.Error())
			return
		}
		if !isPermit {
			ctx.Error(http.StatusNotFound)
			return
		}
	}

	//If we have matched and access to release or issue
	if setting.Attachment.StoreType == storage.MinioStorageType {
		url := ""
		if typeCloudBrain == models.TypeCloudBrainOne {
			url, err = storage.Attachments.PresignedGetURL(attach.RelativePath(), attach.Name)
			if err != nil {
				ctx.ServerError("PresignedGetURL", err)
				return
			}
		} else {
			url, err = storage.ObsGetPreSignedUrl(attach.UUID, attach.Name)
			if err != nil {
				ctx.ServerError("ObsGetPreSignedUrl", err)
				return
			}
		}

		log.Info(url)

		if err = increaseDownloadCount(attach, dataSet); err != nil {
			ctx.ServerError("Update", err)
			return
		}

		http.Redirect(ctx.Resp, ctx.Req.Request, url, http.StatusMovedPermanently)
	} else {
		fr, err := storage.Attachments.Open(attach.RelativePath())
		if err != nil {
			ctx.ServerError("Open", err)
			return
		}
		defer fr.Close()

		if err = increaseDownloadCount(attach, dataSet); err != nil {
			ctx.ServerError("Update", err)
			return
		}
		if err = ServeData(ctx, attach.Name, fr); err != nil {
			ctx.ServerError("ServeData", err)
			return
		}
	}

}

func increaseDownloadCount(attach *models.Attachment, dataSet *models.Dataset) error {
	if err := attach.IncreaseDownloadCount(); err != nil {
		return err
	}

	if dataSet != nil {
		if err := models.IncreaseDownloadCount(dataSet.ID); err != nil {
			return err
		}
	}

	return nil
}

// Get a presigned url for put object
func GetPresignedPutObjectURL(ctx *context.Context) {
	if !setting.Attachment.Enabled {
		ctx.Error(404, "attachment is not enabled")
		return
	}

	err := upload.VerifyFileType(ctx.Params("file_type"), strings.Split(setting.Attachment.AllowedTypes, ","))
	if err != nil {
		ctx.Error(400, err.Error())
		return
	}

	if setting.Attachment.StoreType == storage.MinioStorageType {
		uuid := gouuid.NewV4().String()
		url, err := storage.Attachments.PresignedPutURL(models.AttachmentRelativePath(uuid))
		if err != nil {
			ctx.ServerError("PresignedPutURL", err)
			return
		}

		ctx.JSON(200, map[string]string{
			"uuid": uuid,
			"url":  url,
		})
	} else {
		ctx.Error(404, "storage type is not enabled")
		return
	}
}

// AddAttachment response for add attachment record
func AddAttachment(ctx *context.Context) {
	typeCloudBrain := ctx.QueryInt("type")
	err := checkTypeCloudBrain(typeCloudBrain)
	if err != nil {
		ctx.ServerError("checkTypeCloudBrain failed", err)
		return
	}

	uuid := ctx.Query("uuid")
	has := false
	if typeCloudBrain == models.TypeCloudBrainOne {
		has, err = storage.Attachments.HasObject(models.AttachmentRelativePath(uuid))
		if err != nil {
			ctx.ServerError("HasObject", err)
			return
		}
	} else {
		has, err = storage.ObsHasObject(setting.BasePath + models.AttachmentRelativePath(uuid) + "/" + uuid)
		if err != nil {
			ctx.ServerError("ObsHasObject", err)
			return
		}
	}

	if !has {
		ctx.Error(404, "attachment has not been uploaded")
		return
	}

	attachment, err := models.InsertAttachment(&models.Attachment{
		UUID:       uuid,
		UploaderID: ctx.User.ID,
		IsPrivate:  true,
		Name:       ctx.Query("file_name"),
		Size:       ctx.QueryInt64("size"),
		DatasetID:  ctx.QueryInt64("dataset_id"),
		Type:		typeCloudBrain,
	})

	if err != nil {
		ctx.Error(500, fmt.Sprintf("InsertAttachment: %v", err))
		return
	}

	if attachment.DatasetID != 0 {
		if strings.HasSuffix(attachment.Name, ".zip") {
			if typeCloudBrain == models.TypeCloudBrainOne {
				err = worker.SendDecompressTask(contexExt.Background(), uuid)
				if err != nil {
					log.Error("SendDecompressTask(%s) failed:%s", uuid, err.Error())
				} else {
					attachment.DecompressState = models.DecompressStateIng
					err = models.UpdateAttachment(attachment)
					if err != nil {
						log.Error("UpdateAttachment state(%s) failed:%s", uuid, err.Error())
					}
				}
			}
			//todo:decompress type_two
		}
	}

	ctx.JSON(200, map[string]string{
		"result_code": "0",
	})
}

func UpdateAttachmentDecompressState(ctx *context.Context) {
	uuid := ctx.Query("uuid")
	result := ctx.Query("result")
	attach, err := models.GetAttachmentByUUID(uuid)
	if err != nil {
		log.Error("GetAttachmentByUUID(%s) failed:%s", uuid, err.Error())
		return
	}

	if result == DecompressSuccess {
		attach.DecompressState = models.DecompressStateDone
	} else if result == DecompressFailed {
		attach.DecompressState = models.DecompressStateFailed
	} else {
		log.Error("result is error:", result)
		return
	}

	err = models.UpdateAttachment(attach)
	if err != nil {
		log.Error("UpdateAttachment(%s) failed:%s", uuid, err.Error())
		return
	}

	ctx.JSON(200, map[string]string{
		"result_code": "0",
	})
}

func GetSuccessChunks(ctx *context.Context) {
	fileMD5 := ctx.Query("md5")
	typeCloudBrain := ctx.QueryInt("type")
	var chunks string

	err := checkTypeCloudBrain(typeCloudBrain)
	if err != nil {
		ctx.ServerError("checkTypeCloudBrain failed", err)
		return
	}

	fileChunk, err := models.GetFileChunkByMD5AndUser(fileMD5, ctx.User.ID, typeCloudBrain)
	if err != nil {
		if models.IsErrFileChunkNotExist(err) {
			ctx.JSON(200, map[string]string{
				"uuid":     "",
				"uploaded": "0",
				"uploadID": "",
				"chunks":   "",
			})
		} else {
			ctx.ServerError("GetFileChunkByMD5", err)
		}
		return
	}

	isExist := false
	if typeCloudBrain == models.TypeCloudBrainOne {
		isExist, err = storage.Attachments.HasObject(models.AttachmentRelativePath(fileChunk.UUID))
		if err != nil {
			ctx.ServerError("HasObject failed", err)
			return
		}
	} else {
		isExist, err = storage.ObsHasObject(models.AttachmentRelativePath(fileChunk.UUID))
		if err != nil {
			ctx.ServerError("ObsHasObject failed", err)
			return
		}
	}


	if isExist {
		if fileChunk.IsUploaded == models.FileNotUploaded {
			log.Info("the file has been uploaded but not recorded")
			fileChunk.IsUploaded = models.FileUploaded
			if err = models.UpdateFileChunk(fileChunk); err != nil {
				log.Error("UpdateFileChunk failed:", err.Error())
			}
		}
	} else {
		if fileChunk.IsUploaded == models.FileUploaded {
			log.Info("the file has been recorded but not uploaded")
			fileChunk.IsUploaded = models.FileNotUploaded
			if err = models.UpdateFileChunk(fileChunk); err != nil {
				log.Error("UpdateFileChunk failed:", err.Error())
			}
		}

		if typeCloudBrain == models.TypeCloudBrainOne {
			chunks, err = storage.GetPartInfos(fileChunk.UUID, fileChunk.UploadID)
			if err != nil {
				ctx.ServerError("GetPartInfos failed", err)
				return
			}
		} else {
			chunks, err = storage.GetObsPartInfos(fileChunk.UUID, fileChunk.UploadID)
			if err != nil {
				ctx.ServerError("GetObsPartInfos failed", err)
				return
			}
		}
	}

	var attachID int64
	attach, err := models.GetAttachmentByUUID(fileChunk.UUID)
	if err != nil {
		if models.IsErrAttachmentNotExist(err) {
			attachID = 0
		} else {
			ctx.ServerError("GetAttachmentByUUID", err)
			return
		}
	} else {
		attachID = attach.ID
	}

	if attach == nil {
		ctx.JSON(200, map[string]string{
			"uuid":        fileChunk.UUID,
			"uploaded":    strconv.Itoa(fileChunk.IsUploaded),
			"uploadID":    fileChunk.UploadID,
			"chunks":      string(chunks),
			"attachID":    "0",
			"datasetID":   "0",
			"fileName":    "",
			"datasetName": "",
		})
		return
	}

	dataset, err := models.GetDatasetByID(attach.DatasetID)
	if err != nil {
		ctx.ServerError("GetDatasetByID", err)
		return
	}

	ctx.JSON(200, map[string]string{
		"uuid":        fileChunk.UUID,
		"uploaded":    strconv.Itoa(fileChunk.IsUploaded),
		"uploadID":    fileChunk.UploadID,
		"chunks":      string(chunks),
		"attachID":    strconv.Itoa(int(attachID)),
		"datasetID":   strconv.Itoa(int(attach.DatasetID)),
		"fileName":    attach.Name,
		"datasetName": dataset.Title,
	})

}

func NewMultipart(ctx *context.Context) {
	if !setting.Attachment.Enabled {
		ctx.Error(404, "attachment is not enabled")
		return
	}

	err := upload.VerifyFileType(ctx.Query("fileType"), strings.Split(setting.Attachment.AllowedTypes, ","))
	if err != nil {
		ctx.Error(400, err.Error())
		return
	}

	typeCloudBrain := ctx.QueryInt("type")
	err = checkTypeCloudBrain(typeCloudBrain)
	if err != nil {
		ctx.ServerError("checkTypeCloudBrain failed", err)
		return
	}

	if setting.Attachment.StoreType == storage.MinioStorageType {
		totalChunkCounts := ctx.QueryInt("totalChunkCounts")
		if totalChunkCounts > minio_ext.MaxPartsCount {
			ctx.Error(400, fmt.Sprintf("chunk counts(%d) is too much", totalChunkCounts))
			return
		}

		fileSize := ctx.QueryInt64("size")
		if fileSize > minio_ext.MaxMultipartPutObjectSize {
			ctx.Error(400, fmt.Sprintf("file size(%d) is too big", fileSize))
			return
		}

		uuid := gouuid.NewV4().String()
		var uploadID string
		if typeCloudBrain == models.TypeCloudBrainOne {
			uploadID, err = storage.NewMultiPartUpload(uuid)
			if err != nil {
				ctx.ServerError("NewMultipart", err)
				return
			}
		} else {
			uploadID, err = storage.NewObsMultiPartUpload(uuid)
			if err != nil {
				ctx.ServerError("NewObsMultiPartUpload", err)
				return
			}
		}

		_, err = models.InsertFileChunk(&models.FileChunk{
			UUID:        uuid,
			UserID:      ctx.User.ID,
			UploadID:    uploadID,
			Md5:         ctx.Query("md5"),
			Size:        fileSize,
			TotalChunks: totalChunkCounts,
			Type:		 typeCloudBrain,
		})

		if err != nil {
			ctx.Error(500, fmt.Sprintf("InsertFileChunk: %v", err))
			return
		}

		ctx.JSON(200, map[string]string{
			"uuid":     uuid,
			"uploadID": uploadID,
		})
	} else {
		ctx.Error(404, "storage type is not enabled")
		return
	}
}

func GetMultipartUploadUrl(ctx *context.Context) {
	uuid := ctx.Query("uuid")
	uploadID := ctx.Query("uploadID")
	partNumber := ctx.QueryInt("chunkNumber")
	size := ctx.QueryInt64("size")

	typeCloudBrain := ctx.QueryInt("type")
	err := checkTypeCloudBrain(typeCloudBrain)
	if err != nil {
		ctx.ServerError("checkTypeCloudBrain failed", err)
		return
	}

	url := ""
	if typeCloudBrain == models.TypeCloudBrainOne {
		if size > minio_ext.MinPartSize {
			ctx.Error(400, fmt.Sprintf("chunk size(%d) is too big", size))
			return
		}

		url, err = storage.GenMultiPartSignedUrl(uuid, uploadID, partNumber, size)
		if err != nil {
			ctx.Error(500, fmt.Sprintf("GenMultiPartSignedUrl failed: %v", err))
			return
		}
	} else {
		url, err = storage.ObsGenMultiPartSignedUrl(uuid, uploadID, partNumber, size)
		if err != nil {
			ctx.Error(500, fmt.Sprintf("ObsGenMultiPartSignedUrl failed: %v", err))
			return
		}
	}

	ctx.JSON(200, map[string]string{
		"url": url,
	})
}

func GetObsKey(ctx *context.Context) {
	uuid := gouuid.NewV4().String()
	key := strings.TrimPrefix(path.Join(setting.BasePath, path.Join(uuid[0:1], uuid[1:2], uuid, uuid)), "/")

	ctx.JSON(200, map[string]string{
		"uuid": uuid,
		"key": key,
		"access_key_id": setting.AccessKeyID,
		"secret_access_key": setting.SecretAccessKey,
		"server": setting.Endpoint,
		"bucket": setting.Bucket,
	})
}

func UploadPart(ctx *context.Context) {
	tmp, err := ctx.Req.Body().String()
	log.Info(tmp)

	err = ctx.Req.ParseMultipartForm(100*1024*1024)
	if err != nil {
		ctx.Error(http.StatusBadRequest, fmt.Sprintf("ParseMultipartForm failed: %v", err))
		return
	}

	file, fileHeader, err := ctx.Req.FormFile("file")
	log.Info(ctx.Req.Form.Get("file"))
	if err != nil {
		ctx.Error(http.StatusBadRequest, fmt.Sprintf("FormFile failed: %v", err))
		return
	}



	log.Info(fileHeader.Filename)

	etag, err := storage.ObsUploadPart("", "", 1, 1, file)
	if err != nil {
		ctx.Error(500, fmt.Sprintf("ObsUploadPart failed: %v", err))
		return
	}

	ctx.JSON(200, map[string]string{
		"etag": etag,
	})
}

func CompleteMultipart(ctx *context.Context) {
	uuid := ctx.Query("uuid")
	uploadID := ctx.Query("uploadID")
	typeCloudBrain := ctx.QueryInt("type")

	err := checkTypeCloudBrain(typeCloudBrain)
	if err != nil {
		ctx.ServerError("checkTypeCloudBrain failed", err)
		return
	}

	fileChunk, err := models.GetFileChunkByUUID(uuid)
	if err != nil {
		if models.IsErrFileChunkNotExist(err) {
			ctx.Error(404)
		} else {
			ctx.ServerError("GetFileChunkByUUID", err)
		}
		return
	}

	if typeCloudBrain == models.TypeCloudBrainOne {
		_, err = storage.CompleteMultiPartUpload(uuid, uploadID)
		if err != nil {
			ctx.Error(500, fmt.Sprintf("CompleteMultiPartUpload failed: %v", err))
			return
		}
	} else {
		err = storage.CompleteObsMultiPartUpload(uuid, uploadID)
		if err != nil {
			ctx.Error(500, fmt.Sprintf("CompleteObsMultiPartUpload failed: %v", err))
			return
		}
	}

	fileChunk.IsUploaded = models.FileUploaded

	err = models.UpdateFileChunk(fileChunk)
	if err != nil {
		ctx.Error(500, fmt.Sprintf("UpdateFileChunk: %v", err))
		return
	}

	attachment, err := models.InsertAttachment(&models.Attachment{
		UUID:       uuid,
		UploaderID: ctx.User.ID,
		IsPrivate:  true,
		Name:       ctx.Query("file_name"),
		Size:       ctx.QueryInt64("size"),
		DatasetID:  ctx.QueryInt64("dataset_id"),
		Type:		typeCloudBrain,
	})

	if err != nil {
		ctx.Error(500, fmt.Sprintf("InsertAttachment: %v", err))
		return
	}

	if attachment.DatasetID != 0 {
		if strings.HasSuffix(attachment.Name, ".zip") {
			err = worker.SendDecompressTask(contexExt.Background(), uuid)
			if err != nil {
				log.Error("SendDecompressTask(%s) failed:%s", uuid, err.Error())
			} else {
				attachment.DecompressState = models.DecompressStateIng
				err = models.UpdateAttachment(attachment)
				if err != nil {
					log.Error("UpdateAttachment state(%s) failed:%s", uuid, err.Error())
				}
			}
		}
	}

	ctx.JSON(200, map[string]string{
		"result_code": "0",
	})
}

func UpdateMultipart(ctx *context.Context) {
	uuid := ctx.Query("uuid")
	partNumber := ctx.QueryInt("chunkNumber")
	etag := ctx.Query("etag")

	fileChunk, err := models.GetFileChunkByUUID(uuid)
	if err != nil {
		if models.IsErrFileChunkNotExist(err) {
			ctx.Error(404)
		} else {
			ctx.ServerError("GetFileChunkByUUID", err)
		}
		return
	}

	fileChunk.CompletedParts = append(fileChunk.CompletedParts, strconv.Itoa(partNumber)+"-"+strings.Replace(etag, "\"", "", -1))

	err = models.UpdateFileChunk(fileChunk)
	if err != nil {
		ctx.Error(500, fmt.Sprintf("UpdateFileChunk: %v", err))
		return
	}

	ctx.JSON(200, map[string]string{
		"result_code": "0",
	})
}

func HandleUnDecompressAttachment() {
	attachs, err := models.GetUnDecompressAttachments()
	if err != nil {
		log.Error("GetUnDecompressAttachments failed:", err.Error())
		return
	}

	for _, attach := range attachs {
		err = worker.SendDecompressTask(contexExt.Background(), attach.UUID)
		if err != nil {
			log.Error("SendDecompressTask(%s) failed:%s", attach.UUID, err.Error())
		} else {
			attach.DecompressState = models.DecompressStateIng
			err = models.UpdateAttachment(attach)
			if err != nil {
				log.Error("UpdateAttachment state(%s) failed:%s", attach.UUID, err.Error())
			}
		}
	}

	return
}

func QueryAllPublicDataset(ctx *context.Context) {
	attachs, err := models.GetAllPublicAttachments()
	if err != nil {
		ctx.JSON(200, map[string]string{
			"result_code": "-1",
			"error_msg":   err.Error(),
			"data":        "",
		})
		return
	}

	queryDatasets(ctx, attachs)
}

func QueryPrivateDataset(ctx *context.Context) {
	username := ctx.Params(":username")
	attachs, err := models.GetPrivateAttachments(username)
	if err != nil {
		ctx.JSON(200, map[string]string{
			"result_code": "-1",
			"error_msg":   err.Error(),
			"data":        "",
		})
		return
	}

	for _, attach := range attachs {
		attach.Name = username
	}

	queryDatasets(ctx, attachs)
}

func queryDatasets(ctx *context.Context, attachs []*models.AttachmentUsername) {
	var datasets []CloudBrainDataset
	if len(attachs) == 0 {
		log.Info("dataset is null")
		ctx.JSON(200, map[string]string{
			"result_code": "0",
			"error_msg":   "",
			"data":        "",
		})
		return
	}

	for _, attch := range attachs {
		has, err := storage.Attachments.HasObject(models.AttachmentRelativePath(attch.UUID))
		if err != nil || !has {
			continue
		}

		datasets = append(datasets, CloudBrainDataset{strconv.FormatInt(attch.ID, 10),
			attch.Attachment.Name,
			setting.Attachment.Minio.RealPath +
				setting.Attachment.Minio.Bucket + "/" +
				setting.Attachment.Minio.BasePath +
				models.AttachmentRelativePath(attch.UUID) +
				attch.UUID,
			attch.Name,
			attch.CreatedUnix.Format("2006-01-02 03:04:05 PM")})
	}

	data, err := json.Marshal(datasets)
	if err != nil {
		log.Error("json.Marshal failed:", err.Error())
		ctx.JSON(200, map[string]string{
			"result_code": "-1",
			"error_msg":   err.Error(),
			"data":        "",
		})
		return
	}

	ctx.JSON(200, map[string]string{
		"result_code": "0",
		"error_msg":   "",
		"data":        string(data),
	})
	return
}

func checkTypeCloudBrain(typeCloudBrain int) error {
	if typeCloudBrain != models.TypeCloudBrainOne && typeCloudBrain != models.TypeCloudBrainTwo {
		log.Error("type error:", typeCloudBrain)
		return errors.New("type error")
	}
	return nil
}