package main

import (
	"net"
	"net/rpc"

	"gitlab.com/go-course-project/go17/skills/rpc/hello_world/service"
)

var _ service.HelloService = (*HelloServiceServer)(nil)

// 实现业务功能
// req := &HelloRequest{}
// resp := &HelloResponse{}
// err := &HelloServiceServer{}.Hello(req, resp)
// net/rpc
// 1. 写好的对象， 注册给RPC Server
// 2. 再把RPC Server 启动起来
type HelloServiceServer struct {
}

// HTTP Handler
func (h *HelloServiceServer) Hello(request *service.HelloRequest, response *service.HelloResponse) error {
	response.Message = "hello:" + request.MyName
	return nil
}

func main() {
	// 1. 把业务 注册给RPC
	// 2. RPC 业务RPC必须是满足条件的接口:  (req any, req any) error
	// Hello(request *HelloRequest, response *HelloResponse) error
	if err := rpc.RegisterName("HelloService", &HelloServiceServer{}); err != nil {
		panic(err)
	}

	// 启动RPC服务
	listener, err := net.Listen("tcp", ":1234")
	if err != nil {
		panic(err)
	}
	defer listener.Close()
	for {
		conn, err := listener.Accept()
		if err != nil {
			continue
		}
		// 用户的net层数据 转交给 rpc框架
		go rpc.ServeConn(conn)
	}
}