package models

import (
	"code.gitea.io/gitea/modules/timeutil"
	"xorm.io/xorm"
)

const (
	FileNotUploaded int = iota
	FileUploaded
)

const (
	TypeCloudBrainOne = 0
	TypeCloudBrainTwo = 1
)

type FileChunk struct {
	ID             int64  `xorm:"pk autoincr"`
	UUID           string `xorm:"uuid UNIQUE"`
	Md5            string `xorm:"INDEX"`
	IsUploaded     int    `xorm:"DEFAULT 0"` // not uploaded: 0, uploaded: 1
	UploadID       string `xorm:"UNIQUE"`    //minio upload id
	TotalChunks    int
	Size           int64
	UserID         int64              `xorm:"INDEX"`
	Type           int                `xorm:"INDEX DEFAULT 0"`
	CompletedParts []string           `xorm:"DEFAULT ''"` // chunkNumber+etag eg: ,1-asqwewqe21312312.2-123hjkas
	CreatedUnix    timeutil.TimeStamp `xorm:"INDEX created"`
	UpdatedUnix    timeutil.TimeStamp `xorm:"INDEX updated"`
}

// GetFileChunkByMD5 returns fileChunk by given id
func GetFileChunkByMD5(md5 string) (*FileChunk, error) {
	return getFileChunkByMD5(x, md5)
}

func getFileChunkByMD5(e Engine, md5 string) (*FileChunk, error) {
	fileChunk := new(FileChunk)

	if has, err := e.Where("md5 = ?", md5).Get(fileChunk); err != nil {
		return nil, err
	} else if !has {
		return nil, ErrFileChunkNotExist{md5, ""}
	}
	return fileChunk, nil
}

// GetFileChunkByMD5 returns fileChunk by given id
func GetFileChunkByMD5AndUser(md5 string, userID int64, typeCloudBrain int) (*FileChunk, error) {
	return getFileChunkByMD5AndUser(x, md5, userID, typeCloudBrain)
}

func getFileChunkByMD5AndUser(e Engine, md5 string, userID int64, typeCloudBrain int) (*FileChunk, error) {
	fileChunk := new(FileChunk)

	if has, err := e.Where("md5 = ? and user_id = ? and type = ?", md5, userID, typeCloudBrain).Get(fileChunk); err != nil {
		return nil, err
	} else if !has {
		return nil, ErrFileChunkNotExist{md5, ""}
	}
	return fileChunk, nil
}

// GetAttachmentByID returns attachment by given id
func GetFileChunkByUUID(uuid string) (*FileChunk, error) {
	return getFileChunkByUUID(x, uuid)
}

func getFileChunkByUUID(e Engine, uuid string) (*FileChunk, error) {
	fileChunk := new(FileChunk)

	if has, err := e.Where("uuid = ?", uuid).Get(fileChunk); err != nil {
		return nil, err
	} else if !has {
		return nil, ErrFileChunkNotExist{"", uuid}
	}
	return fileChunk, nil
}

// InsertFileChunk insert a record into file_chunk.
func InsertFileChunk(fileChunk *FileChunk) (_ *FileChunk, err error) {
	if _, err := x.Insert(fileChunk); err != nil {
		return nil, err
	}

	return fileChunk, nil
}

// UpdateAttachment updates the given attachment in database
func UpdateFileChunk(fileChunk *FileChunk) error {
	return updateFileChunk(x, fileChunk)
}

func updateFileChunk(e Engine, fileChunk *FileChunk) error {
	var sess *xorm.Session
	sess = e.Where("uuid = ?", fileChunk.UUID)
	_, err := sess.Cols("is_uploaded").Update(fileChunk)
	return err
}