package rpc

import (
	"context"
	"fmt"
	"log"
	"net"

	"github.com/spf13/viper"
	"google.golang.org/grpc"
	"google.golang.org/grpc/health/grpc_health_v1"

	"passport/app/rpc/pb"
	"passport/consul"
)

func RegisterToConsul() {
	consul.RegitserService("127.0.0.1:8500", &consul.ConsulService{
		Name: "im_passport",
		Tag:  []string{"im_passport"},
		IP:   "127.0.0.1",
		Port: viper.GetInt("server.rpc_port"),
	})
}

//health
type Server struct{}
type HealthImpl struct{}

// Check 实现健康检查接口，这里直接返回健康状态，这里也可以有更复杂的健康检查策略，比如根据服务器负载来返回
func (h *HealthImpl) Check(ctx context.Context, req *grpc_health_v1.HealthCheckRequest) (*grpc_health_v1.HealthCheckResponse, error) {
	fmt.Print("health checking\n")
	return &grpc_health_v1.HealthCheckResponse{
		Status: grpc_health_v1.HealthCheckResponse_SERVING,
	}, nil
}

func (h *HealthImpl) Watch(req *grpc_health_v1.HealthCheckRequest, w grpc_health_v1.Health_WatchServer) error {
	return nil
}

func StartGrpcServer() {
	lis, err := net.Listen("tcp", ":"+viper.GetString("server.rpc_port"))
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}
	s := grpc.NewServer()
	passportpb.RegisterPassportServer(s, &Server{})
	grpc_health_v1.RegisterHealthServer(s, &HealthImpl{})
	RegisterToConsul()
	if err := s.Serve(lis); err != nil {
		log.Fatalf("failed to serve: %v", err)
	}
}