package service

import (
	"crypto/md5"
	"crypto/sha1"
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"fm-upload/internal/biz"
	"fm-upload/internal/conf"
	"fm-upload/internal/data/model"
	response "fm-upload/internal/data/model"
	"fm-upload/internal/data/model/request"
	"hash"
	"io"
	"path/filepath"
	"regexp"
	"strings"
	"time"

	"errors"

	"github.com/aliyun/alibaba-cloud-sdk-go/sdk/utils"
	"github.com/gin-gonic/gin"
)

const obs = "bkb-obs-dev"

// GreeterService is a greeter service.
type StorageService struct {
	conf *conf.System
	uc   *biz.StorageUsecase
	ic   *biz.ImageUsecase
}

// NewGreeterService new a greeter service.
func NewStorageService(uc *biz.StorageUsecase, ic *biz.ImageUsecase, conf *conf.System) *StorageService {
	return &StorageService{uc: uc, ic: ic, conf: conf}
}

// SayHello implements helloworld.GreeterServer.
func (s *StorageService) Upload(c *gin.Context, in *request.UploadRequest) (*request.UploadResponse, error) {
	//文件类型,大小
	var oName string

	// fmt.Println(x.File.Header)
	if in.Type == "image" || in.Type == "avatar" {
		if in.File.Size > int64(s.conf.ImageSize)*1048576 {
			return nil, errors.New("image file too large")
		}
		oName = in.Type + "/"
	} else if in.Type == "video" {
		if in.File.Size > int64(s.conf.VideoSize)*1048576 {
			return nil, errors.New("video file too large")
		}
		oName = "video/"
	} else {
		if in.File.Size > int64(s.conf.DocSize)*1048576 {
			return nil, errors.New("doc file too large")
		}
		oName = "doc/"
	}
	//文件名
	fileName := strings.ReplaceAll(in.FileName, " ", "") //指定

	fileEnd := filepath.Ext(in.File.Filename)
	fileId := utils.GetUUID()
	var key string
	if fileName != "" {
		re := regexp.MustCompile("[\u4e00-\u9fa5_\\-a-zA-Z0-9\\.]+")
		t := re.FindAllString(fileName, -1)
		fileName = strings.Join(t, "")
	}
	if fileName != "" {
		re, _ := regexp.Compile(`\.([^.]*)$`)
		t := re.FindStringIndex(fileName)
		if t != nil {
			fileId = fileName[:t[0]] + "_" + fileId[:10]
			fileEnd = fileName[t[0]:]
		} else {
			fileId = fileName + "_" + fileId[:10]
		}
	}
	key = oName + time.Now().Format("20060102") + "/" + fileId
	fileEnd = strings.ToLower(fileEnd)
	key += fileEnd
	resData := request.UploadResponse{UploadFileName: in.File.Filename,
		VframeTime: -1}
	func() {
		if len(in.Hash) > 0 {
			fileHash := ""
			var hh hash.Hash
			if in.Hash == "sha256" {
				hh = sha256.New()
			} else if in.Hash == "sha1" {
				hh = sha1.New()
			} else if in.Hash == "md5" {
				hh = md5.New()
			} else {
				return
			}
			file, _ := in.File.Open()
			if _, err := io.Copy(hh, file); err == nil {
				fileHash = hex.EncodeToString(hh.Sum(nil))
			}
			resData.Hash = fileHash
			file.Seek(0, 0)
		}
	}()
	return s.uc.UploadToServer(c, oName, resData, key, in.File, obs)
}

// SayHello implements helloworld.GreeterServer.
func (s *StorageService) Ping(c *gin.Context) {
	response.Ok(c)
}

func (s *StorageService) ImagesController(c *gin.Context, in *request.CompressImagesRequest) (*request.ImagesCompressResponse, error) {
	var (
		err error
		p   []model.ImageParams
	)
	err = json.Unmarshal([]byte(in.ProcessParams), &p)
	if err != nil {
		return nil, errors.New("processParams format error")
	}
	return s.ic.ImagesController(c, in, p, obs)
}

func (s *StorageService) ImageController(c *gin.Context, in *request.CompressImageRequest) (*model.ImageCompressResponse, error) {
	return s.ic.ImageController(c, in, obs)
}