package main

import (
	"context"
	"fmt"
	"github.com/go-kratos/examples/helloworld/helloworld"
	"github.com/go-kratos/kratos/v2"
	"github.com/go-kratos/kratos/v2/errors"
	"github.com/go-kratos/kratos/v2/middleware/metadata"
	"github.com/go-kratos/kratos/v2/middleware/recovery"
	"github.com/go-kratos/kratos/v2/transport/grpc"
	"github.com/go-kratos/kratos/v2/transport/http"
	"log"
)

// go build -ldflags "-X main.Version=x.y.z"
var (
	// Name is the name of the compiled software.
	Name = "helloworld"
	// Version is the version of the compiled software.
	// Version = "v1.0.0"
)

// server is used to implement helloworld.GreeterServer.
type server struct {
	helloworld.UnimplementedGreeterServer
}

// SayHello implements helloworld.GreeterServer
func (s *server) SayHello(ctx context.Context, in *helloworld.HelloRequest) (*helloworld.HelloReply, error) {
        // 断言 http.Context，用于获取 http.ResponseWriter
	hctx, ok := ctx.(http.Context)
	if !ok {
		return nil, errors.BadRequest("custom_error", "not a http.Context")
	}
        hctx.Response()
	if in.Name == "error" {
		return nil, errors.BadRequest("custom_error", fmt.Sprintf("invalid argument %s", in.Name))
	}
	if in.Name == "panic" {
		panic("server panic")
	}
	return &helloworld.HelloReply{Message: fmt.Sprintf("Hello %+v", in.Name)}, nil
}

func main() {
	s := &server{}
	httpSrv := http.NewServer(
		http.Address(":8000"),
		http.Middleware(
			recovery.Recovery(),
                        // 增加中间件
			metadata.Server(),
		),
	)
	grpcSrv := grpc.NewServer(
		grpc.Address(":9000"),
		grpc.Middleware(
			recovery.Recovery(),
		),
	)
	helloworld.RegisterGreeterServer(grpcSrv, s)
	helloworld.RegisterGreeterHTTPServer(httpSrv, s)

	app := kratos.New(
		kratos.Name(Name),
		kratos.Server(
			httpSrv,
			grpcSrv,
		),
	)

	if err := app.Run(); err != nil {
		log.Fatal(err)
	}
}