package resolver

import (
	"git.hlsq.asia/mmorpg/service-common/log"
	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"
	"google.golang.org/grpc/keepalive"
	"time"
)

const serviceConfig = `{
	"loadBalancingConfig": [
		{
			"round_robin": {}
		}
	],
	"healthCheckConfig": {
		"serviceName": ""
	}
}`

func NewGrpcConnection(target string) (*grpc.ClientConn, error) {
	cc, err := grpc.NewClient(
		target,
		grpc.WithTransportCredentials(insecure.NewCredentials()),
		grpc.WithStatsHandler(otelgrpc.NewClientHandler()),
		grpc.WithDefaultServiceConfig(serviceConfig),
		grpc.WithKeepaliveParams(
			keepalive.ClientParameters{
				Time:                30 * time.Second, // 保活探测包发送的时间间隔
				Timeout:             10 * time.Second, // 保活探测包的超时时间
				PermitWithoutStream: true,
			},
		),
	)
	if err != nil {
		log.Errorf("create grpc err: %v, target: %v", err, target)
		return nil, err
	}
	return cc, nil
}