package logic

import (
	"encoding/json"
	"fmt"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"fusenapi/utils/hash"
	"time"

	"context"

	"fusenapi/server/upload/internal/svc"
	"fusenapi/server/upload/internal/types"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/service/s3"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/mr"
)

type UploadFilesFrontendLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewUploadFilesFrontendLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UploadFilesFrontendLogic {
	return &UploadFilesFrontendLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// 处理进入前逻辑w,r
// func (l *UploadFilesFrontendLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
// }

// 处理逻辑后 w,r 如:重定向, resp 必须重新处理
// func (l *UploadFilesFrontendLogic) AfterLogic(w http.ResponseWriter, r *http.Request, resp *basic.Response) {
// // httpx.OkJsonCtx(r.Context(), w, resp)
// }

func (l *UploadFilesFrontendLogic) UploadFilesFrontend(req *types.UploadFilesReq, userinfo *auth.UserInfo) (resp *basic.Response) {
	// 返回值必须调用Set重新返回, resp可以空指针调用 resp.SetStatus(basic.CodeOK, data)
	// userinfo 传入值时, 一定不为null
	// 定义用户ID和S3键名格式
	var uid int64
	var userId int64
	var guestId int64

	// 检查用户是否是游客
	if userinfo.IsGuest() {
		// 如果是，使用游客ID和游客键名格式
		guestId = userinfo.GuestId
		uid = guestId
	} else {
		// 否则，使用用户ID和用户键名格式
		userId = userinfo.UserId
		uid = userId
	}

	var uploadInfoList []UploadInfo
	err := json.Unmarshal([]byte(req.UploadInfo), &uploadInfoList)
	if err != nil {
		logx.Error(err)
		return resp.SetStatus(basic.CodeFileUploadErr, "file upload err,params Unmarshal failed")
	}

	var fileLen = len(uploadInfoList)

	if fileLen == 0 {
		return resp.SetStatus(basic.CodeFileUploadErr, "file upload err,no files")
	}
	if req.ApiType == 1 && fileLen > 100 {
		return resp.SetStatus(basic.CodeFileUploadErr, "file upload err, files count is beyond the maximum")
	}

	// 定义存储桶名称
	var bucketName *string

	// 根据类别选择存储桶
	switch req.UploadBucket {
	case 2:
		bucketName = basic.TempfileBucketName
	default:
		bucketName = basic.StorageBucketName
	}

	// 设置AWS会话的区域
	l.svcCtx.AwsSession.Config.Region = aws.String("us-west-1")

	// 创建新的S3服务实例
	svc := s3.New(l.svcCtx.AwsSession)

	result, err := mr.MapReduce(func(source chan<- interface{}) {
		for _, info := range uploadInfoList {
			if info.FileSize <= 1024*1024*500 {
				// 一系列业务逻辑....验证类型,文件大小
				var hashKey string = hash.JsonHashKey(fmt.Sprintf("%s%d", info.FileKeys, uid))
				source <- UploadData{
					FileKey:  info.FileKeys,
					FileSize: info.FileSize,
					Bucket:   bucketName,
					HashKey:  hashKey,
				}
			}
		}
	}, func(item interface{}, writer mr.Writer[interface{}], cancel func(error)) {
		var uploadUrl = UploadUrl{}
		uploadDataInfo := item.(UploadData)

		s3req, _ := svc.PutObjectRequest(
			&s3.PutObjectInput{
				Bucket:        uploadDataInfo.Bucket,
				Key:           &uploadDataInfo.HashKey,
				ContentLength: aws.Int64(uploadDataInfo.FileSize),
			},
		)

		url, err := s3req.Presign(time.Minute * 5)
		if err != nil {
			logx.Error(err)
			uploadUrl.Status = 0
			uploadUrl.Url = ""
			uploadUrl.ResourceId = uploadDataInfo.HashKey
			uploadUrl.Key = uploadDataInfo.FileKey
		} else {
			// 打印请求URL
			logx.Info(url)
			uploadUrl.Status = 1
			uploadUrl.Url = url
			uploadUrl.ResourceId = uploadDataInfo.HashKey
			uploadUrl.Key = uploadDataInfo.FileKey
		}
		// Notice 这个必须加!
		writer.Write(uploadUrl)
	}, func(pipe <-chan interface{}, writer mr.Writer[interface{}], cancel func(error)) {
		var uploadUrlList = make(map[string][]*UploadUrl)
		var uploadUrlListFail []*UploadUrl
		var uploadUrlListSuccess []*UploadUrl
		for p := range pipe {
			var uploadUrl = p.(UploadUrl)
			if uploadUrl.Status == 1 {
				uploadUrlListSuccess = append(uploadUrlListSuccess, &uploadUrl)
			} else {
				uploadUrlListFail = append(uploadUrlListFail, &uploadUrl)
			}
		}

		// Notice 这个必须加!
		uploadUrlList["success"] = uploadUrlListSuccess
		uploadUrlList["fail"] = uploadUrlListFail
		writer.Write(uploadUrlList)
	})
	if err != nil {
		logx.Error(err)
	}

	// 返回成功的响应和上传URL
	return resp.SetStatus(basic.CodeOK, map[string]interface{}{
		"upload_urls": result,
	})
}