package repo

import (
	"fmt"
	"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"
	gouuid "github.com/satori/go.uuid"
)

func GetModelChunks(ctx *context.Context) {
	fileMD5 := ctx.Query("md5")
	typeCloudBrain := ctx.QueryInt("type")
	fileName := ctx.Query("file_name")
	scene := ctx.Query("scene")
	modeluuid := ctx.Query("modeluuid")
	log.Info("scene=" + scene + " typeCloudBrain=" + fmt.Sprint(typeCloudBrain))
	var chunks string

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

	fileChunk, err := models.GetModelFileChunkByMD5AndUser(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(fileChunk.ObjectName)
		if isExist {
			log.Info("The file is exist in minio. has uploaded.path=" + fileChunk.ObjectName)
		} else {
			log.Info("The file is not exist in minio..")
		}
		if err != nil {
			ctx.ServerError("HasObject failed", err)
			return
		}
	} else {
		isExist, err = storage.ObsHasObject(fileChunk.ObjectName)
		if isExist {
			log.Info("The file is exist in obs. has uploaded. path=" + fileChunk.ObjectName)
		} else {
			log.Info("The file is not exist in obs.")
		}
		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.UpdateModelFileChunk(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.UpdateModelFileChunk(fileChunk); err != nil {
				log.Error("UpdateFileChunk failed:", err.Error())
			}
		}

		if typeCloudBrain == models.TypeCloudBrainOne {
			chunks, err = storage.GetPartInfos(fileChunk.ObjectName, fileChunk.UploadID)
			if err != nil {
				log.Error("GetPartInfos failed:%v", err.Error())
			}
		} else {
			chunks, err = storage.GetObsPartInfos(fileChunk.ObjectName, fileChunk.UploadID)
			if err != nil {
				log.Error("GetObsPartInfos failed:%v", err.Error())
			}
		}
		if err != nil {
			models.DeleteModelFileChunk(fileChunk)
			ctx.JSON(200, map[string]string{
				"uuid":     "",
				"uploaded": "0",
				"uploadID": "",
				"chunks":   "",
			})
			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
	}

	//使用description存储模型信息
	dbmodeluuid := attach.Description
	modelname := ""
	if dbmodeluuid != modeluuid {
		log.Info("The file has uploaded.fileChunk.ObjectName=" + fileChunk.ObjectName + " typeCloudBrain=" + fmt.Sprint(typeCloudBrain))
		isExist := copyModelAttachmentFile(typeCloudBrain, fileChunk, fileName, modeluuid)
		if dbmodeluuid != "" {
			model, err := models.QueryModelById(dbmodeluuid)
			if err == nil && model != nil {
				modelname = model.Name
			}
		}
		if isExist {
			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)),
				"modeluuid": modeluuid,
				"fileName":  attach.Name,
				"modelName": modelname,
			})
		} else {
			UpdateModelSize(modeluuid)
			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)),
				"fileName": attach.Name,
			})
		}
		return
	} else {
		model, err := models.QueryModelById(dbmodeluuid)
		if err == nil {
			modelname = model.Name
		}
		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)),
			"modeluuid": dbmodeluuid,
			"fileName":  attach.Name,
			"modelName": modelname,
		})
		return
	}

}

func copyModelAttachmentFile(typeCloudBrain int, fileChunk *models.ModelFileChunk, fileName, modeluuid string) bool {
	srcObjectName := fileChunk.ObjectName
	var isExist bool
	//copy
	destObjectName := getObjectName(fileName, modeluuid)
	if typeCloudBrain == models.TypeCloudBrainOne {
		bucketName := setting.Attachment.Minio.Bucket
		log.Info("minio copy..srcObjectName=" + srcObjectName + " bucketName=" + bucketName)
		if storage.MinioGetFilesSize(bucketName, []string{destObjectName}) > 0 {
			isExist = true
		} else {

			log.Info("minio copy..srcObjectName=" + srcObjectName + " bucketName=" + bucketName)
			storage.MinioCopyAFile(bucketName, srcObjectName, bucketName, destObjectName)
		}
	} else {
		bucketName := setting.Bucket
		log.Info("obs copy..srcObjectName=" + srcObjectName + " bucketName=" + bucketName)
		if storage.ObsGetFilesSize(bucketName, []string{destObjectName}) > 0 {
			isExist = true
		} else {
			log.Info("obs copy..srcObjectName=" + srcObjectName + " bucketName=" + bucketName)
			storage.ObsCopyFile(bucketName, srcObjectName, bucketName, destObjectName)
		}
	}
	return isExist
}

func getObjectName(filename string, modeluuid string) string {
	return strings.TrimPrefix(path.Join(Model_prefix, path.Join(modeluuid[0:1], modeluuid[1:2], modeluuid, filename)), "/")
}

func NewModelMultipart(ctx *context.Context) {
	if !setting.Attachment.Enabled {
		ctx.Error(404, "attachment is not enabled")
		return
	}
	fileName := ctx.Query("file_name")
	modeluuid := ctx.Query("modeluuid")

	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
		var objectName string
		if typeCloudBrain == models.TypeCloudBrainOne {
			objectName = strings.TrimPrefix(path.Join(Model_prefix, path.Join(modeluuid[0:1], modeluuid[1:2], modeluuid, fileName)), "/")
			uploadID, err = storage.NewMultiPartUpload(objectName)
			if err != nil {
				ctx.ServerError("NewMultipart", err)
				return
			}
		} else {

			objectName = strings.TrimPrefix(path.Join(Model_prefix, path.Join(modeluuid[0:1], modeluuid[1:2], modeluuid, fileName)), "/")
			uploadID, err = storage.NewObsMultiPartUpload(objectName)
			if err != nil {
				ctx.ServerError("NewObsMultiPartUpload", err)
				return
			}
		}

		_, err = models.InsertModelFileChunk(&models.ModelFileChunk{
			UUID:        uuid,
			UserID:      ctx.User.ID,
			UploadID:    uploadID,
			Md5:         ctx.Query("md5"),
			Size:        fileSize,
			ObjectName:  objectName,
			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 GetModelMultipartUploadUrl(ctx *context.Context) {
	uuid := ctx.Query("uuid")
	uploadID := ctx.Query("uploadID")
	partNumber := ctx.QueryInt("chunkNumber")
	size := ctx.QueryInt64("size")
	fileName := ctx.Query("file_name")
	typeCloudBrain := ctx.QueryInt("type")
	err := checkTypeCloudBrain(typeCloudBrain)
	if err != nil {
		ctx.ServerError("checkTypeCloudBrain failed", err)
		return
	}
	fileChunk, err := models.GetModelFileChunkByUUID(uuid)
	if err != nil {
		if models.IsErrFileChunkNotExist(err) {
			ctx.Error(404)
		} else {
			ctx.ServerError("GetFileChunkByUUID", 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(fileChunk.ObjectName, uploadID, partNumber, size)
		if err != nil {
			ctx.Error(500, fmt.Sprintf("GenMultiPartSignedUrl failed: %v", err))
			return
		}
	} else {
		if setting.PROXYURL != "" {
			url = setting.PROXYURL + "/obs_proxy_multipart?uuid=" + uuid + "&uploadId=" + uploadID + "&partNumber=" + fmt.Sprint(partNumber) + "&file_name=" + fileName
			log.Info("return url=" + url)
		} else {
			url, err = storage.ObsGenMultiPartSignedUrl(fileChunk.ObjectName, uploadID, partNumber)
			if err != nil {
				ctx.Error(500, fmt.Sprintf("ObsGenMultiPartSignedUrl failed: %v", err))
				return
			}
			log.Info("url=" + url)
		}
	}

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

func CompleteModelMultipart(ctx *context.Context) {
	uuid := ctx.Query("uuid")
	uploadID := ctx.Query("uploadID")
	typeCloudBrain := ctx.QueryInt("type")
	fileName := ctx.Query("file_name")
	modeluuid := ctx.Query("modeluuid")
	log.Warn("uuid:" + uuid)
	log.Warn("modeluuid:" + modeluuid)
	log.Warn("typeCloudBrain:" + strconv.Itoa(typeCloudBrain))

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

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

	fileChunk.IsUploaded = models.FileUploaded

	err = models.UpdateModelFileChunk(fileChunk)
	if err != nil {
		ctx.Error(500, fmt.Sprintf("UpdateFileChunk: %v", err))
		return
	}
	//更新模型大小信息
	UpdateModelSize(modeluuid)

	_, err = models.InsertAttachment(&models.Attachment{
		UUID:        uuid,
		UploaderID:  ctx.User.ID,
		IsPrivate:   true,
		Name:        fileName,
		Size:        ctx.QueryInt64("size"),
		DatasetID:   0,
		Description: modeluuid,
		Type:        typeCloudBrain,
	})

	if err != nil {
		ctx.Error(500, fmt.Sprintf("InsertAttachment: %v", err))
		return
	}
	ctx.JSON(200, map[string]string{
		"result_code": "0",
	})

}