package svc

import (
	"context"
	"errors"
	"fmt"
	"gim/internal/business/comm/md"
	"gim/internal/business/comm/service/qiniu"
	"gim/internal/business/comm/utils"
	"gim/internal/business/comm/utils/logx"
	"strings"
)

// 请求文件上传
func FileReqUpload(ctx context.Context, uid, dirName, fName, callbackUrl string, fSize int64) (interface{}, error) {
	ext := utils.FileExt(fName)
	if err := initStg(ctx, fSize, ext); err != nil {
		return nil, err
	}
	newName := dirName + "_" + fmt.Sprintf("%010s", uid)

	// 默认都加时间戳
	newName += "_" + utils.FormatNanoUnix() + utils.RandString(4, "0123456789")
	newName += "." + ext

	f := &md.FileCallback{
		Uid:      uid,
		DirId:    md.FileUserDir[dirName],
		FileName: newName,
	}
	return qiniu.ReqImgUpload(f, callbackUrl), nil
}

func initStg(ctx context.Context, fSize int64, ext string) error {
	// 获取上传配置
	stgInfo := SysCfgFind(
		ctx,
		md.KEY_CFG_FILE_BUCKET,
		md.KEY_CFG_FILE_HOST,
		md.KEY_CFG_FILE_AK,
		md.KEY_CFG_FILE_SK,
		md.KEY_CFG_FILE_PVD,
		md.KEY_CFG_FILE_REGION,
		md.KEY_CFG_FILE_MAX_SIZE,
		md.KEY_CFG_FILE_EXT,
		md.KEY_CFG_FILE_SCHEME,
	)

	if stgInfo == nil {
		return errors.New("获取配置信息出错")
	}
	// todo 目前仅支持七牛
	if v, ok := stgInfo[md.KEY_CFG_FILE_PVD]; !ok || v != "qiniu" {
		return errors.New("file_provider error")
	}
	if v, ok := stgInfo[md.KEY_CFG_FILE_REGION]; !ok || v == "" {
		return errors.New("file_bucket_region error")
	}
	if v, ok := stgInfo[md.KEY_CFG_FILE_AK]; !ok || v == "" {
		return errors.New("file_access_key error")
	}
	if v, ok := stgInfo[md.KEY_CFG_FILE_SK]; !ok || v == "" {
		return errors.New("file_secret_key error")
	}
	if v, ok := stgInfo[md.KEY_CFG_FILE_BUCKET]; !ok || v == "" {
		return errors.New("file_bucket error")
	}
	if v, ok := stgInfo[md.KEY_CFG_FILE_SCHEME]; !ok || v == "" {
		stgInfo[md.KEY_CFG_FILE_SCHEME] = "http"
		SysCfgSet(ctx, md.KEY_CFG_FILE_SCHEME, stgInfo[md.KEY_CFG_FILE_SCHEME], "文件域名HTTP协议")
	}
	qiniu.Init(stgInfo[md.KEY_CFG_FILE_AK], stgInfo[md.KEY_CFG_FILE_SK], stgInfo[md.KEY_CFG_FILE_BUCKET], stgInfo[md.KEY_CFG_FILE_REGION], stgInfo[md.KEY_CFG_FILE_SCHEME])
	if v, ok := stgInfo[md.KEY_CFG_FILE_HOST]; !ok || v == "" {
		var err error
		stgInfo[md.KEY_CFG_FILE_HOST], err = qiniu.BucketGetDomain(stgInfo[md.KEY_CFG_FILE_BUCKET])
		if err != nil {
			logx.Error(err)
			return errors.New("服务器配置错误")
		}
		SysCfgSet(ctx, md.KEY_CFG_FILE_HOST, stgInfo[md.KEY_CFG_FILE_HOST], "文件域名地址")
	}

	// 检查文件大小限制
	if v, ok := stgInfo[md.KEY_CFG_FILE_MAX_SIZE]; ok && v != "" && utils.StrToInt64(v) < fSize {
		return errors.New("file_user_upload_max_size error")
	}
	// 检查文件后缀
	if v, ok := stgInfo[md.KEY_CFG_FILE_EXT]; ok && v != "" && !strings.Contains(v, ext) {
		return errors.New("file_ext error")
	}
	return nil
}