package main

import(
	"context"
	"fmt"
	log "github.com/sirupsen/logrus"
	"google.golang.org/grpc"
	"io"
	"net"
	"strconv"
	"sync"
	pb "test/grpctest/proto"
	"time"
)

type Server struct {

}

//一元
func (s *Server) GetData (context context.Context, reqData *pb.ReqData) (*pb.RepData, error){
	fmt.Println("request:",reqData.Data)

	rep := &pb.RepData{
		Data: "hello,"+reqData.Data,
	}
	return rep,nil

}


//服务端发送流调用
func (s *Server) GetStream (req *pb.ReqData, rep pb.ObjectStorageService_GetStreamServer ) error{
	fmt.Println("request",req.Data)
	if req.Data == "shuai" {
		cnt := 0
		resp := &pb.RepData{
			Data: "hello,"+req.Data,
		}
		for{
			err := rep.Send(resp)
			if err != nil{
				fmt.Println("send to client failed:",err.Error())
				break
			}
			time.Sleep(time.Second)
			if cnt > 10 {
				break
			}
			cnt++
		}
	}else{
		fmt.Println("error request")
	}
	return nil
}

//
func (s *Server) SetStream(req pb.ObjectStorageService_SetStreamServer) error {
	var err error
	for {
		req,err := req.Recv()
		if err != nil{
			if err == io.EOF {
				fmt.Println("server received over")
				break
			}else{
				fmt.Println("error:",err.Error())
				break
			}
		}
		fmt.Println("server received:",req.Data)
	}
	rep := &pb.ReqData{
		Data: "over",
	}
	req.SendMsg(rep)
	return err
}

//双向流式调用
func (s *Server) AllStream (req pb.ObjectStorageService_AllStreamServer) error {
	wg := sync.WaitGroup{}
	wg.Add(2)
	go func() {
		defer wg.Done()
		for {
			recvMsg,err := req.Recv()
			if err != nil{
				if err == io.EOF {
					fmt.Println("server received over")
					break
				}else{
					fmt.Println("error:",err.Error())
					break
				}
			}
			fmt.Println("server received",recvMsg.Data)
		}
	}()
	go func() {
		defer wg.Done()
		cnt := 0
		for {
			err := req.Send(&pb.RepData{
				Data: "over" + strconv.Itoa(cnt),
			})
			if err != nil{
				fmt.Println("error:",err.Error())
			}
			if cnt > 3 {
				break
			}
			cnt++
			time.Sleep(time.Second)
		}
	}()
	wg.Wait()
	return nil
}

func main(){
	listen,err := net.Listen("tcp","127.0.0.1:10000")
	if err != nil {
		log.Fatal("server build error:",err.Error())
	}
	g := grpc.NewServer()
	pb.RegisterObjectStorageServiceServer(g,&Server{})
	err = g.Serve(listen)
	if err != nil {
		log.Fatal("failed to server:",err.Error())
	}
}