package main

import (
	"github.com/nats-io/nats.go"
	"github.com/redis/go-redis/v9"
	clientv3 "go.etcd.io/etcd/client/v3"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"
	"google.golang.org/grpc/resolver"
	"sonet/internal/gateway_ws/server"
	"sonet/internal/postal/logic"
	"sonet/pkg/config"
	"sonet/pkg/grpc/client"
	"sonet/pkg/grpc/discovery"
	"sonet/pkg/grpc/generic"
	"sonet/pkg/plugins/cache"
	"sonet/pkg/plugins/mq"
	"sonet/pkg/utils/conver"
	"sonet/pkg/utils/shutdown"
	"sync"
)

type GatewayWsConfig struct {
	HttpPort        int
	EndpointAddress string

	SubjectCacheTopic         string
	SubjectLrcExpiration      string
	SubjectLrcCleanupInterval string
}

// websocket server with postalService
func main() {
	appConf := &GatewayWsConfig{}
	conf := config.LoadConfig(appConf, "cmd/gateway_ws")

	// registry and run
	etcdClient, err := clientv3.New(conf.Etcd)
	if err != nil {
		panic(err)
	}
	sessionStore := &sync.Map{}
	subjectStore, err := getSubjectMultiCache(appConf, conf.Redis, conf.Nats)
	if err != nil {
		panic(err)
	}
	clientFactory := client.NewGrpcDirectClientFactory(grpc.WithTransportCredentials(insecure.NewCredentials()))

	etcdResolver := discovery.NewResolver(etcdClient)
	resolver.Register(etcdResolver)

	grpcFactory := generic.NewGpcGenericClientFactory(etcdResolver, grpc.WithTransportCredentials(insecure.NewCredentials()))
	grpcFactory.Init()

	postalAddr := discovery.MustRegisterAddress(conf.Grpc.Address)
	connHandler := server.NewConnHandler(postalAddr, grpcFactory, sessionStore, subjectStore)
	httpServer := server.NewHttpServer(connHandler)
	go func() {
		err = httpServer.Run(appConf.HttpPort)
		if err != nil {
			panic(err)
		}
	}()

	// run postal server
	registry := discovery.NewRegister(etcdClient)
	shutdown.AddShutdownHook(registry.Stop)
	postalServer := logic.NewPostalServer(appConf.EndpointAddress, sessionStore, subjectStore, clientFactory)
	go func() {
		err = postalServer.Run(conf.Grpc, registry)
		if err != nil {
			panic(err)
		}
	}()

	// run postal cluster server
	postalClusterServer := logic.NewPostalClusterServer(postalServer)
	go func() {
		err := postalClusterServer.Run(conf.Grpc.Address, config.GetGrpcOptions(conf.Grpc)...)
		if err != nil {
			panic(err)
		}
	}()

	shutdown.Await()
}

func getSubjectMultiCache(appConf *GatewayWsConfig, redisOptions redis.Options, natsOptions nats.Options) (*cache.LocalRemoteCache, error) {
	// initial cache...
	rdb := redis.NewClient(&redisOptions)
	subjectRedisCache := cache.NewRedisCache(appConf.SubjectCacheTopic, rdb)
	shutdown.AddShutdownHook(func() { _ = rdb.Close() })

	// nats mq
	producer, err := mq.NewNatsProducer(natsOptions)
	if err != nil {
		return nil, err
	}
	shutdown.AddShutdownHook(func() { producer.Stop() })
	consumer, err := mq.NewNatsConsumer(natsOptions)
	if err != nil {
		return nil, err
	}
	shutdown.AddShutdownHook(func() { consumer.Stop() })

	// 多级缓存
	subjectLrcOpts := cache.LocalRemoteCacheOptions{
		Topic:           appConf.SubjectCacheTopic,
		LocalExpiration: conver.MustParseDuration(appConf.SubjectLrcExpiration),
		CleanupInterval: conver.MustParseDuration(appConf.SubjectLrcCleanupInterval),
		Remote:          subjectRedisCache,
		Producer:        producer,
		Consumer:        consumer,
	}
	subjectLrc, err := cache.NewLocalRemoteCache(subjectLrcOpts)
	return subjectLrc, err
}