package ImRelateController

import (
	"bytes"
	"dsSzxy/Utils/CommonUtil"
	"dsSzxy/Utils/ConfigUtil"
	"dsSzxy/Utils/MinioUtil"
	"encoding/base64"
	"fmt"
	"github.com/disintegration/imaging"
	"github.com/gin-gonic/gin"
	"github.com/minio/minio-go/v6"
	"io/ioutil"
	"log"
	"net/http"
	"net/url"
	"os"
	"strings"
)

//模块的路由配置
func Routers(r *gin.RouterGroup) {
	rr := r.Group("/imRelate")
	rr.POST("/fileUpload", fileUpload)
}



//聊天中的文件上传
func fileUpload(c *gin.Context) {
	file, err := c.FormFile("file")
	if err != nil {
		c.String(http.StatusBadRequest, fmt.Sprintf("get form err: %s", err.Error()))
		return
	}
	//扩展名
	ext := CommonUtil.Ext(file.Filename)
	ext = strings.ToLower(ext)
	//真实文件名
	uuid := CommonUtil.GetUUID()
	//子目录
	p := ConfigUtil.SavePath + uuid[0:2]
	exist := CommonUtil.Exists(p)
	if !exist {
		os.Mkdir(p, os.ModePerm)
	}

	trueName := uuid + ext
	filename := p + "/" + trueName
	if err := c.SaveUploadedFile(file, filename); err != nil {
		c.String(http.StatusBadRequest, fmt.Sprintf("upload file err: %s", err.Error()))
		return
	}

	//文件大小
	content, err := ioutil.ReadFile(filename)
	if err == nil {
		fmt.Println("file size is ", len(content))
	}
	size := len(content)

	// 初使化 minio client对象。
	minioClient, err := MinioUtil.GetMinioClient()
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "info": "minio无法连接！"})
		return
	}

	// 使用FPutObject上传一个zip文件。
	contentType := "application/octet-stream"
	_, err = minioClient.FPutObject(ConfigUtil.MinioBucket, trueName[0:2]+"/"+trueName, filename, minio.PutObjectOptions{ContentType: contentType})
	if err != nil {
		log.Fatalln(err)
	}

	//返回
	s := getFileDownLoadUrl(trueName[0:2]+"/"+trueName, file.Filename)
	originUrl := ConfigUtil.MinioDownloadPrefix + ConfigUtil.MinioBucket + "/" + trueName[0:2] + "/" + trueName

	//判断扩展名是不是图片
	if ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".bmp" {
		//读取本地文件
		imgData, _ := ioutil.ReadFile(filename)
		buf := bytes.NewBuffer(imgData)
		image, err := imaging.Decode(buf)
		if err != nil {
			fmt.Println(err)
			return
		}
		//生成缩略图
		image = imaging.Resize(image, 0, 150, imaging.Lanczos)
		thumbFileName := uuid + "_thumb" + ext
		thumbTrueName := p + "/" + thumbFileName
		err = imaging.Save(image, thumbTrueName)
		if err != nil {
			fmt.Println(err)
		}

		//读入生成图片的base64编码
		ff, _ := os.Open(thumbTrueName)
		defer ff.Close()
		sourceBuffer := make([]byte, 500000)
		n, _ := ff.Read(sourceBuffer)
		//base64压缩
		sourceString := base64.StdEncoding.EncodeToString(sourceBuffer[:n])
		//删除原始文件
		os.Remove(filename)
		//删除缩略图文件
		os.Remove(thumbTrueName)
		c.JSON(200, gin.H{
			"success":      true,
			"originUrl":    originUrl,
			"url":          s,
			"thumbContent": sourceString,
			"size":         size,
		})
	} else {
		//删除原始文件
		os.Remove(filename)
		c.JSON(200, gin.H{
			"success": true,
			"url":     s,
			"size":    size,
		})
	}
}

/**
功能：生成下载地址带中文名
*/
func getFileDownLoadUrl(key string, originName string) string {
	infix := "?response-content-disposition=attachment%3BfileName%2A%3DUTF-8%27%27"
	downloadUrl := ConfigUtil.MinioDownloadPrefix + ConfigUtil.MinioBucket + "/" + key + infix + url.QueryEscape(url.QueryEscape(originName))
	return downloadUrl
}