package waku

/*
	#cgo LDFLAGS: -L../third_party/nwaku/build/ -lnegentropy -lwaku
	#cgo LDFLAGS: -L../third_party/nwaku -Wl,-rpath,../third_party/nwaku/build/

	#include "../third_party/nwaku/library/libwaku.h"
	#include <stdio.h>
	#include <stdlib.h>

	extern void globalEventCallback(int ret, char* msg, size_t len, void* userData);

	typedef struct {
		int ret;
		char* msg;
		size_t len;
		void* ffiWg;
	} Resp;

	static void* allocResp(void* wg) {
		Resp* r = calloc(1, sizeof(Resp));
		r->ffiWg = wg;
		return r;
	}

	static void freeResp(void* resp) {
		if (resp != NULL) {
			free(resp);
		}
	}

	static char* getMyCharPtr(void* resp) {
		if (resp == NULL) {
			return NULL;
		}
		Resp* m = (Resp*) resp;
		return m->msg;
	}

	static size_t getMyCharLen(void* resp) {
		if (resp == NULL) {
			return 0;
		}
		Resp* m = (Resp*) resp;
		return m->len;
	}

	static int getRet(void* resp) {
		if (resp == NULL) {
			return 0;
		}
		Resp* m = (Resp*) resp;
		return m->ret;
	}

	// resp must be set != NULL in case interest on retrieving data from the callback
	void GoCallback(int ret, char* msg, size_t len, void* resp);

	#define WAKU_CALL(call)                                                        \
	do {                                                                           \
		int ret = call;                                                            \
		if (ret != 0) {                                                            \
			printf("Failed the call to: %s. Returned code: %d\n", #call, ret);     \
			exit(1);                                                               \
		}                                                                          \
	} while (0)

	static void* cGoWakuNew(const char* configJson, void* resp) {
		// We pass NULL because we are not interested in retrieving data from this callback
		void* ret = waku_new(configJson, (WakuCallBack) GoCallback, resp);
		return ret;
	}

	static void cGoWakuStart(void* wakuCtx, void* resp) {
		WAKU_CALL(waku_start(wakuCtx, (WakuCallBack) GoCallback, resp));
	}

	static void cGoWakuStop(void* wakuCtx, void* resp) {
		WAKU_CALL(waku_stop(wakuCtx, (WakuCallBack) GoCallback, resp));
	}

	static void cGoWakuDestroy(void* wakuCtx, void* resp) {
		WAKU_CALL(waku_destroy(wakuCtx, (WakuCallBack) GoCallback, resp));
	}

	static void cGoWakuStartDiscV5(void* wakuCtx, void* resp) {
		WAKU_CALL(waku_start_discv5(wakuCtx, (WakuCallBack) GoCallback, resp));
	}

	static void cGoWakuStopDiscV5(void* wakuCtx, void* resp) {
		WAKU_CALL(waku_stop_discv5(wakuCtx, (WakuCallBack) GoCallback, resp));
	}

	static void cGoWakuVersion(void* wakuCtx, void* resp) {
		WAKU_CALL(waku_version(wakuCtx, (WakuCallBack) GoCallback, resp));
	}

	static void cGoWakuSetEventCallback(void* wakuCtx) {
		// The 'globalEventCallback' Go function is shared amongst all possible Waku instances.

		// Given that the 'globalEventCallback' is shared, we pass again the
		// wakuCtx instance but in this case is needed to pick up the correct method
		// that will handle the event.

		// In other words, for every call the libwaku makes to globalEventCallback,
		// the 'userData' parameter will bring the context of the node that registered
		// that globalEventCallback.

		// This technique is needed because cgo only allows to export Go functions and not methods.

		waku_set_event_callback(wakuCtx, (WakuCallBack) globalEventCallback, wakuCtx);
	}

	static void cGoWakuContentTopic(void* wakuCtx,
							char* appName,
							int appVersion,
							char* contentTopicName,
							char* encoding,
							void* resp) {

		WAKU_CALL( waku_content_topic(wakuCtx,
							appName,
							appVersion,
							contentTopicName,
							encoding,
							(WakuCallBack) GoCallback,
							resp) );
	}

	static void cGoWakuPubsubTopic(void* wakuCtx, char* topicName, void* resp) {
		WAKU_CALL( waku_pubsub_topic(wakuCtx, topicName, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuDefaultPubsubTopic(void* wakuCtx, void* resp) {
		WAKU_CALL (waku_default_pubsub_topic(wakuCtx, (WakuCallBack) GoCallback, resp));
	}

	static void cGoWakuRelayPublish(void* wakuCtx,
                       const char* pubSubTopic,
                       const char* jsonWakuMessage,
                       int timeoutMs,
					   void* resp) {

		WAKU_CALL (waku_relay_publish(wakuCtx,
                       pubSubTopic,
                       jsonWakuMessage,
                       timeoutMs,
                       (WakuCallBack) GoCallback,
                       resp));
	}

	static void cGoWakuRelaySubscribe(void* wakuCtx, char* pubSubTopic, void* resp) {
		WAKU_CALL ( waku_relay_subscribe(wakuCtx,
							pubSubTopic,
							(WakuCallBack) GoCallback,
							resp) );
	}

	static void cGoWakuRelayUnsubscribe(void* wakuCtx, char* pubSubTopic, void* resp) {

		WAKU_CALL ( waku_relay_unsubscribe(wakuCtx,
							pubSubTopic,
							(WakuCallBack) GoCallback,
							resp) );
	}

	static void cGoWakuConnect(void* wakuCtx, char* peerMultiAddr, int timeoutMs, void* resp) {
		WAKU_CALL( waku_connect(wakuCtx,
						peerMultiAddr,
						timeoutMs,
						(WakuCallBack) GoCallback,
						resp) );
	}

	static void cGoWakuDialPeer(void* wakuCtx,
									char* peerMultiAddr,
									char* protocol,
									int timeoutMs,
									void* resp) {

		WAKU_CALL( waku_dial_peer(wakuCtx,
						peerMultiAddr,
						protocol,
						timeoutMs,
						(WakuCallBack) GoCallback,
						resp) );
	}

	static void cGoWakuDialPeerById(void* wakuCtx,
									char* peerId,
									char* protocol,
									int timeoutMs,
									void* resp) {

		WAKU_CALL( waku_dial_peer_by_id(wakuCtx,
						peerId,
						protocol,
						timeoutMs,
						(WakuCallBack) GoCallback,
						resp) );
	}

	static void cGoWakuDisconnectPeerById(void* wakuCtx, char* peerId, void* resp) {
		WAKU_CALL( waku_disconnect_peer_by_id(wakuCtx,
						peerId,
						(WakuCallBack) GoCallback,
						resp) );
	}

	static void cGoWakuListenAddresses(void* wakuCtx, void* resp) {
		WAKU_CALL (waku_listen_addresses(wakuCtx, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuGetMyENR(void* ctx, void* resp) {
		WAKU_CALL (waku_get_my_enr(ctx, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuGetMyPeerId(void* ctx, void* resp) {
		WAKU_CALL (waku_get_my_peerid(ctx, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuPingPeer(void* ctx, char* peerAddr, int timeoutMs, void* resp) {
		WAKU_CALL (waku_ping_peer(ctx, peerAddr, timeoutMs, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuGetNumPeersInMesh(void* ctx, char* pubSubTopic, void* resp) {
		WAKU_CALL (waku_relay_get_num_peers_in_mesh(ctx, pubSubTopic, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuGetNumConnectedRelayPeers(void* ctx, char* pubSubTopic, void* resp) {
		WAKU_CALL (waku_relay_get_num_connected_peers(ctx, pubSubTopic, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuGetConnectedPeers(void* wakuCtx, void* resp) {
		WAKU_CALL (waku_get_connected_peers(wakuCtx, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuGetPeerIdsFromPeerStore(void* wakuCtx, void* resp) {
		WAKU_CALL (waku_get_peerids_from_peerstore(wakuCtx, (WakuCallBack) GoCallback, resp) );
	}

	static void cGoWakuLightpushPublish(void* wakuCtx,
					const char* pubSubTopic,
					const char* jsonWakuMessage,
					void* resp) {

		WAKU_CALL (waku_lightpush_publish(wakuCtx,
						pubSubTopic,
						jsonWakuMessage,
						(WakuCallBack) GoCallback,
						resp));
	}

	static void cGoWakuStoreQuery(void* wakuCtx,
					const char* jsonQuery,
					const char* peerAddr,
					int timeoutMs,
					void* resp) {

		WAKU_CALL (waku_store_query(wakuCtx,
									jsonQuery,
									peerAddr,
									timeoutMs,
									(WakuCallBack) GoCallback,
									resp));
	}

	static void cGoWakuPeerExchangeQuery(void* wakuCtx,
								uint64_t numPeers,
								void* resp) {

		WAKU_CALL (waku_peer_exchange_request(wakuCtx,
									numPeers,
									(WakuCallBack) GoCallback,
									resp));
	}

	static void cGoWakuGetPeerIdsByProtocol(void* wakuCtx,
									 const char* protocol,
									 void* resp) {

		WAKU_CALL (waku_get_peerids_by_protocol(wakuCtx,
									protocol,
									(WakuCallBack) GoCallback,
									resp));
	}

	static void cGoWakuDnsDiscovery(void* wakuCtx,
									 const char* entTreeUrl,
									 const char* nameDnsServer,
									 int timeoutMs,
									 void* resp) {

		WAKU_CALL (waku_dns_discovery(wakuCtx,
									entTreeUrl,
									nameDnsServer,
									timeoutMs,
									(WakuCallBack) GoCallback,
									resp));
	}

*/
import "C"
import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"runtime"
	"strconv"
	"strings"
	"sync"
	"time"
	"unsafe"

	"github.com/ethereum/go-ethereum/common/hexutil"
	"github.com/ethereum/go-ethereum/p2p/enode"
	"github.com/libp2p/go-libp2p/core/peer"
	libp2pproto "github.com/libp2p/go-libp2p/core/protocol"
	"github.com/multiformats/go-multiaddr"
	"github.com/waku-org/go-waku/waku/v2/protocol/pb"
	storepb "github.com/waku-org/go-waku/waku/v2/protocol/store/pb"
	"github.com/waku-org/go-waku/waku/v2/utils"
	"go.uber.org/zap"
)

const requestTimeout = 30 * time.Second

type WakuConfig struct {
	Host                        string   `json:"host,omitempty"`
	Port                        int      `json:"port,omitempty"`
	Nodekey                     string   `json:"nodekey,omitempty"`
	Relay                       bool     `json:"relay,omitempty"`
	Store                       bool     `json:"store,omitempty"`
	Storenode                   string   `json:"storenode,omitempty"`
	StoreMessageRetentionPolicy string   `json:"storeMessageRetentionPolicy,omitempty"`
	StoreMessageDbUrl           string   `json:"storeMessageDbUrl,omitempty"`
	StoreMessageDbVacuum        bool     `json:"storeMessageDbVacuum,omitempty"`
	StoreMaxNumDbConnections    int      `json:"storeMaxNumDbConnections,omitempty"`
	StoreResume                 bool     `json:"storeResume,omitempty"`
	Filter                      bool     `json:"filter,omitempty"`
	Filternode                  string   `json:"filternode,omitempty"`
	FilterSubscriptionTimeout   int64    `json:"filterSubscriptionTimeout,omitempty"`
	FilterMaxPeersToServe       uint32   `json:"filterMaxPeersToServe,omitempty"`
	FilterMaxCriteria           uint32   `json:"filterMaxCriteria,omitempty"`
	Lightpush                   bool     `json:"lightpush,omitempty"`
	LightpushNode               string   `json:"lightpushnode,omitempty"`
	LogLevel                    string   `json:"logLevel,omitempty"`
	DnsDiscovery                bool     `json:"dnsDiscovery,omitempty"`
	DnsDiscoveryUrl             string   `json:"dnsDiscoveryUrl,omitempty"`
	MaxMessageSize              string   `json:"maxMessageSize,omitempty"`
	Staticnodes                 []string `json:"staticnodes,omitempty"`
	Discv5BootstrapNodes        []string `json:"discv5BootstrapNodes,omitempty"`
	Discv5Discovery             bool     `json:"discv5Discovery,omitempty"`
	Discv5UdpPort               uint16   `json:"discv5UdpPort,omitempty"`
	ClusterID                   uint16   `json:"clusterId,omitempty"`
	Shards                      []uint16 `json:"shards,omitempty"`
	PeerExchange                bool     `json:"peerExchange,omitempty"`
	PeerExchangeNode            string   `json:"peerExchangeNode,omitempty"`
	TcpPort                     uint16   `json:"tcpPort,omitempty"`
}

// Waku represents a dark communication interface through the Ethereum
// network, using its very own P2P communication layer.
type Waku struct {
	node *WakuNode

	ctx    context.Context
	cancel context.CancelFunc

	wakuCfg *WakuConfig

	logger *zap.Logger
}

// Start implements node.Service, starting the background data propagation thread
// of the Waku protocol.
func (w *Waku) Start() error {
	err := w.node.Start()
	if err != nil {
		return fmt.Errorf("failed to start nwaku node: %v", err)
	}

	peerID, err := w.node.PeerID()
	if err != nil {
		return err
	}

	w.logger.Info("Waku PeerID", zap.Stringer("id", peerID))

	return nil
}

// Stop implements node.Service, stopping the background data propagation thread
// of the Waku protocol.
func (w *Waku) Stop() error {
	w.cancel()

	err := w.node.Stop()
	if err != nil {
		return err
	}

	w.ctx = nil
	w.cancel = nil

	return nil
}

func (w *Waku) PeerCount() (int, error) {
	return w.node.GetNumConnectedPeers()
}

func (w *Waku) ListenAddresses() ([]multiaddr.Multiaddr, error) {
	return w.node.ListenAddresses()
}

func (w *Waku) DialPeer(address multiaddr.Multiaddr) error {
	// Using WakuConnect so it matches the go-waku's behavior and terminology
	ctx, cancel := context.WithTimeout(w.ctx, requestTimeout)
	defer cancel()
	return w.node.Connect(ctx, address)
}

func (w *Waku) DialPeerByID(peerID peer.ID, protocol libp2pproto.ID) error {
	ctx, cancel := context.WithTimeout(w.ctx, requestTimeout)
	defer cancel()
	return w.node.DialPeerByID(ctx, peerID, protocol)
}

func (w *Waku) DropPeer(peerID peer.ID) error {
	return w.node.DisconnectPeerByID(peerID)
}

type response struct {
	err   error
	value any
}

//export GoCallback
func GoCallback(ret C.int, msg *C.char, len C.size_t, resp unsafe.Pointer) {
	if resp != nil {
		m := (*C.Resp)(resp)
		m.ret = ret
		m.msg = msg
		m.len = len
		wg := (*sync.WaitGroup)(m.ffiWg)
		wg.Done()
	}
}

// WakuNode represents an instance of an nwaku node
type WakuNode struct {
	wakuCtx unsafe.Pointer
	cancel  context.CancelFunc
}

func newWakuNode(ctx context.Context, config *WakuConfig) (*WakuNode, error) {
	ctx, cancel := context.WithCancel(ctx)

	n := &WakuNode{
		cancel: cancel,
	}

	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		// defer gocommon.LogOnPanic()

		runtime.LockOSThread()
		defer runtime.UnlockOSThread()

		wg.Done()

		<-ctx.Done()
	}()

	wg.Wait()

	jsonConfig, err := json.Marshal(config)
	if err != nil {
		return nil, err
	}

	var cJsonConfig = C.CString(string(jsonConfig))

	var resp = C.allocResp(unsafe.Pointer(&wg))

	defer C.free(unsafe.Pointer(cJsonConfig))
	defer C.freeResp(resp)

	if C.getRet(resp) != C.RET_OK {
		errMsg := "error wakuNew: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		return nil, errors.New(errMsg)
	}

	wg.Add(1)
	n.wakuCtx = C.cGoWakuNew(cJsonConfig, resp)
	wg.Wait()

	// Notice that the events for self node are handled by the 'MyEventCallback' method
	C.cGoWakuSetEventCallback(n.wakuCtx)

	return n, nil
}

// New creates a Waku client ready to communicate through the LibP2P network.
func New(nwakuCfg *WakuConfig, logger *zap.Logger) (*Waku, error) {
	var err error
	if logger == nil {
		logger, err = zap.NewDevelopment()
		if err != nil {
			return nil, err
		}
	}

	logger.Info("starting Waku with config", zap.Any("nwakuCfg", nwakuCfg))

	ctx, cancel := context.WithCancel(context.Background())
	wakunode, err := newWakuNode(ctx, nwakuCfg)
	if err != nil {
		cancel()
		return nil, err
	}

	return &Waku{
		node:    wakunode,
		wakuCfg: nwakuCfg,
		logger:  logger,
		ctx:     ctx,
		cancel:  cancel,
	}, nil
}

//export globalEventCallback
func globalEventCallback(callerRet C.int, msg *C.char, len C.size_t, userData unsafe.Pointer) {
	// This is shared among all Golang instances
	// TODO-nwaku
	// self := Waku{wakuCtx: userData}
	// self.MyEventCallback(callerRet, msg, len)
}

func (n *WakuNode) GetNumConnectedRelayPeers(optPubsubTopic ...string) (int, error) {
	var pubsubTopic string
	if len(optPubsubTopic) == 0 {
		pubsubTopic = ""
	} else {
		pubsubTopic = optPubsubTopic[0]
	}

	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	var cPubsubTopic = C.CString(pubsubTopic)
	defer C.free(unsafe.Pointer(cPubsubTopic))

	C.cGoWakuGetNumConnectedRelayPeers(n.wakuCtx, cPubsubTopic, resp)

	if C.getRet(resp) == C.RET_OK {
		numPeersStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		numPeers, err := strconv.Atoi(numPeersStr)
		if err != nil {
			errMsg := "GetNumConnectedRelayPeers - error converting string to int: " + err.Error()
			return 0, errors.New(errMsg)
		}
		return numPeers, nil
	}
	errMsg := "error GetNumConnectedRelayPeers: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return 0, errors.New(errMsg)
}

func (n *WakuNode) DisconnectPeerByID(peerID peer.ID) error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPeerId = C.CString(peerID.String())
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPeerId))

	wg.Add(1)
	C.cGoWakuDisconnectPeerById(n.wakuCtx, cPeerId, resp)
	wg.Wait()

	if C.getRet(resp) == C.RET_OK {
		return nil
	}
	errMsg := "error DisconnectPeerById: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) GetConnectedPeers() (peer.IDSlice, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuGetConnectedPeers(n.wakuCtx, resp)
	wg.Wait()

	if C.getRet(resp) == C.RET_OK {
		peersStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		if peersStr == "" {
			return nil, nil
		}
		// peersStr contains a comma-separated list of peer ids
		itemsPeerIds := strings.Split(peersStr, ",")
		var peers peer.IDSlice
		for _, peerId := range itemsPeerIds {
			id, err := peer.Decode(peerId)
			if err != nil {
				return nil, fmt.Errorf("GetConnectedPeers - decoding peerId: %w", err)
			}
			peers = append(peers, id)
		}
		return peers, nil
	}
	errMsg := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return nil, fmt.Errorf("GetConnectedPeers: %s", errMsg)

}

func (n *WakuNode) RelaySubscribe(pubsubTopic string) error {
	if pubsubTopic == "" {
		return errors.New("pubsub topic is empty")
	}

	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPubsubTopic = C.CString(pubsubTopic)

	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPubsubTopic))

	if n.wakuCtx == nil {
		return errors.New("wakuCtx is nil")
	}

	wg.Add(1)
	C.cGoWakuRelaySubscribe(n.wakuCtx, cPubsubTopic, resp)
	wg.Wait()

	if C.getRet(resp) == C.RET_OK {
		return nil
	}

	errMsg := "error WakuRelaySubscribe: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) RelayUnsubscribe(pubsubTopic string) error {
	if pubsubTopic == "" {
		return errors.New("pubsub topic is empty")
	}

	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPubsubTopic = C.CString(pubsubTopic)

	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPubsubTopic))

	if n.wakuCtx == nil {
		return errors.New("wakuCtx is nil")
	}

	wg.Add(1)
	C.cGoWakuRelayUnsubscribe(n.wakuCtx, cPubsubTopic, resp)
	wg.Wait()

	if C.getRet(resp) == C.RET_OK {
		return nil
	}

	errMsg := "error WakuRelayUnsubscribe: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) PeerExchangeRequest(numPeers uint64) (uint64, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuPeerExchangeQuery(n.wakuCtx, C.uint64_t(numPeers), resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		numRecvPeersStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		numRecvPeers, err := strconv.ParseUint(numRecvPeersStr, 10, 64)
		if err != nil {
			return 0, err
		}
		return numRecvPeers, nil
	}

	errMsg := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return 0, errors.New(errMsg)
}

func (n *WakuNode) StartDiscV5() error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuStartDiscV5(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		return nil
	}
	errMsg := "error WakuStartDiscV5: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) StopDiscV5() error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuStopDiscV5(n.wakuCtx, resp)
	wg.Wait()

	if C.getRet(resp) == C.RET_OK {
		return nil
	}
	errMsg := "error WakuStopDiscV5: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) Version() (string, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuVersion(n.wakuCtx, resp)
	wg.Wait()

	if C.getRet(resp) == C.RET_OK {
		var version = C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		return version, nil
	}

	errMsg := "error WakuVersion: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return "", errors.New(errMsg)
}

func (n *WakuNode) StoreQuery(ctx context.Context, storeRequest *storepb.StoreQueryRequest, peerInfo peer.AddrInfo) (*storepb.StoreQueryResponse, error) {
	// TODO: extract timeout from context
	timeoutMs := time.Minute.Milliseconds()

	b, err := json.Marshal(storeRequest)
	if err != nil {
		return nil, err
	}

	addrs := make([]string, len(peerInfo.Addrs))
	for i, addr := range utils.EncapsulatePeerID(peerInfo.ID, peerInfo.Addrs...) {
		addrs[i] = addr.String()
	}

	var cJsonQuery = C.CString(string(b))
	var cPeerAddr = C.CString(strings.Join(addrs, ","))
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))

	defer C.free(unsafe.Pointer(cJsonQuery))
	defer C.free(unsafe.Pointer(cPeerAddr))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuStoreQuery(n.wakuCtx, cJsonQuery, cPeerAddr, C.int(timeoutMs), resp)
	wg.Wait()

	if C.getRet(resp) == C.RET_OK {
		jsonResponseStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		storeQueryResponse := &storepb.StoreQueryResponse{}
		err = json.Unmarshal([]byte(jsonResponseStr), storeQueryResponse)
		if err != nil {
			return nil, err
		}
		return storeQueryResponse, nil
	}
	errMsg := "error WakuStoreQuery: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return nil, errors.New(errMsg)
}

func (n *WakuNode) RelayPublish(ctx context.Context, message *pb.WakuMessage, pubsubTopic string) (pb.MessageHash, error) {
	// TODO: extract timeout from context
	timeoutMs := time.Minute.Milliseconds()

	jsonMsg, err := json.Marshal(message)
	if err != nil {
		return pb.MessageHash{}, err
	}

	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPubsubTopic = C.CString(pubsubTopic)
	var msg = C.CString(string(jsonMsg))
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPubsubTopic))
	defer C.free(unsafe.Pointer(msg))

	wg.Add(1)
	C.cGoWakuRelayPublish(n.wakuCtx, cPubsubTopic, msg, C.int(timeoutMs), resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		msgHash := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		msgHashBytes, err := hexutil.Decode(msgHash)
		if err != nil {
			return pb.MessageHash{}, err
		}
		return pb.ToMessageHash(msgHashBytes), nil
	}
	errMsg := "WakuRelayPublish: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return pb.MessageHash{}, errors.New(errMsg)
}

func (n *WakuNode) DnsDiscovery(ctx context.Context, enrTreeUrl string, nameDnsServer string) ([]multiaddr.Multiaddr, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cEnrTree = C.CString(enrTreeUrl)
	var cDnsServer = C.CString(nameDnsServer)
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cEnrTree))
	defer C.free(unsafe.Pointer(cDnsServer))

	// TODO: extract timeout from context
	wg.Add(1)
	C.cGoWakuDnsDiscovery(n.wakuCtx, cEnrTree, cDnsServer, C.int(time.Minute.Milliseconds()), resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		var addrsRet []multiaddr.Multiaddr
		nodeAddresses := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		addrss := strings.Split(nodeAddresses, ",")
		for _, addr := range addrss {
			addr, err := multiaddr.NewMultiaddr(addr)
			if err != nil {
				return nil, err
			}
			addrsRet = append(addrsRet, addr)
		}
		return addrsRet, nil
	}
	errMsg := "error WakuDnsDiscovery: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return nil, errors.New(errMsg)
}

func (n *WakuNode) PingPeer(ctx context.Context, peerInfo peer.AddrInfo) (time.Duration, error) {
	addrs := make([]string, len(peerInfo.Addrs))
	for i, addr := range utils.EncapsulatePeerID(peerInfo.ID, peerInfo.Addrs...) {
		addrs[i] = addr.String()
	}

	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	var cPeerId = C.CString(strings.Join(addrs, ","))
	defer C.free(unsafe.Pointer(cPeerId))

	// TODO: extract timeout from ctx
	wg.Add(1)
	C.cGoWakuPingPeer(n.wakuCtx, cPeerId, C.int(time.Minute.Milliseconds()), resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		rttStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		rttInt, err := strconv.ParseInt(rttStr, 10, 64)
		if err != nil {
			return 0, err
		}
		return time.Duration(rttInt), nil
	}

	errMsg := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return 0, fmt.Errorf("PingPeer: %s", errMsg)
}

func (n *WakuNode) Start() error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuStart(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		return nil
	}

	errMsg := "error WakuStart: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) Stop() error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuStop(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		return nil
	}

	errMsg := "error WakuStop: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) Destroy() error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuDestroy(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		return nil
	}

	errMsg := "error WakuDestroy: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) PeerID() (peer.ID, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuGetMyPeerId(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		peerIdStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		id, err := peer.Decode(peerIdStr)
		if err != nil {
			errMsg := "WakuGetMyPeerId - decoding peerId: %w"
			return "", fmt.Errorf(errMsg, err)
		}
		return id, nil
	}
	errMsg := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return "", errors.New(errMsg)
}

func (n *WakuNode) Connect(ctx context.Context, addr multiaddr.Multiaddr) error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPeerMultiAddr = C.CString(addr.String())
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPeerMultiAddr))

	// TODO: extract timeout from ctx
	wg.Add(1)
	C.cGoWakuConnect(n.wakuCtx, cPeerMultiAddr, C.int(time.Minute.Milliseconds()), resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		return nil
	}
	errMsg := "error WakuConnect: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) DialPeerByID(ctx context.Context, peerID peer.ID, protocol libp2pproto.ID) error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPeerId = C.CString(peerID.String())
	var cProtocol = C.CString(string(protocol))
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPeerId))
	defer C.free(unsafe.Pointer(cProtocol))

	// TODO: extract timeout from ctx
	wg.Add(1)
	C.cGoWakuDialPeerById(n.wakuCtx, cPeerId, cProtocol, C.int(time.Minute.Milliseconds()), resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		return nil
	}
	errMsg := "error DialPeerById: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) ListenAddresses() ([]multiaddr.Multiaddr, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuListenAddresses(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		var addrsRet []multiaddr.Multiaddr
		listenAddresses := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		addrss := strings.Split(listenAddresses, ",")
		for _, addr := range addrss {
			addr, err := multiaddr.NewMultiaddr(addr)
			if err != nil {
				return nil, err
			}
			addrsRet = append(addrsRet, addr)
		}
		return addrsRet, nil
	}
	errMsg := "error WakuListenAddresses: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return nil, errors.New(errMsg)
}

func (n *WakuNode) ENR() (*enode.Node, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuGetMyENR(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		enrStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		n, err := enode.Parse(enode.ValidSchemes, enrStr)
		if err != nil {
			return nil, err
		}
		return n, nil
	}
	errMsg := "error WakuGetMyENR: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return nil, errors.New(errMsg)
}

func (n *WakuNode) GetNumPeersInMesh(pubsubTopic string) (int, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPubsubTopic = C.CString(pubsubTopic)
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPubsubTopic))

	wg.Add(1)
	C.cGoWakuGetNumPeersInMesh(n.wakuCtx, cPubsubTopic, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		numPeersStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		numPeers, err := strconv.Atoi(numPeersStr)
		if err != nil {
			errMsg := "GetNumPeersInMesh - error converting string to int: " + err.Error()
			return 0, errors.New(errMsg)
		}
		return numPeers, nil
	}
	errMsg := "error GetNumPeersInMesh: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return 0, errors.New(errMsg)
}

func (n *WakuNode) GetPeerIDsFromPeerStore() (peer.IDSlice, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	defer C.freeResp(resp)

	wg.Add(1)
	C.cGoWakuGetPeerIdsFromPeerStore(n.wakuCtx, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		peersStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		if peersStr == "" {
			return nil, nil
		}
		// peersStr contains a comma-separated list of peer ids
		itemsPeerIds := strings.Split(peersStr, ",")

		var peers peer.IDSlice
		for _, peerId := range itemsPeerIds {
			id, err := peer.Decode(peerId)
			if err != nil {
				return nil, fmt.Errorf("GetPeerIdsFromPeerStore - decoding peerId: %w", err)
			}
			peers = append(peers, id)
		}
		return peers, nil
	}
	errMsg := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return nil, fmt.Errorf("GetPeerIdsFromPeerStore: %s", errMsg)
}

func (n *WakuNode) GetPeerIDsByProtocol(protocol libp2pproto.ID) (peer.IDSlice, error) {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cProtocol = C.CString(string(protocol))
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cProtocol))

	wg.Add(1)
	C.cGoWakuGetPeerIdsByProtocol(n.wakuCtx, cProtocol, resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		peersStr := C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
		if peersStr == "" {
			return nil, nil
		}
		// peersStr contains a comma-separated list of peer ids
		itemsPeerIds := strings.Split(peersStr, ",")

		var peers peer.IDSlice
		for _, p := range itemsPeerIds {
			id, err := peer.Decode(p)
			if err != nil {
				return nil, fmt.Errorf("GetPeerIdsByProtocol - decoding peerId: %w", err)
			}
			peers = append(peers, id)
		}
		return peers, nil
	}
	errMsg := "error GetPeerIdsByProtocol: " +
		C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return nil, fmt.Errorf("GetPeerIdsByProtocol: %s", errMsg)
}

func (n *WakuNode) DialPeer(ctx context.Context, peerAddr multiaddr.Multiaddr, protocol libp2pproto.ID) error {
	wg := sync.WaitGroup{}

	var resp = C.allocResp(unsafe.Pointer(&wg))
	var cPeerMultiAddr = C.CString(peerAddr.String())
	var cProtocol = C.CString(string(protocol))
	defer C.freeResp(resp)
	defer C.free(unsafe.Pointer(cPeerMultiAddr))
	defer C.free(unsafe.Pointer(cProtocol))
	// TODO: extract timeout from context
	wg.Add(1)
	C.cGoWakuDialPeer(n.wakuCtx, cPeerMultiAddr, cProtocol, C.int(requestTimeout.Milliseconds()), resp)
	wg.Wait()
	if C.getRet(resp) == C.RET_OK {
		return nil
	}
	errMsg := "error DialPeer: " + C.GoStringN(C.getMyCharPtr(resp), C.int(C.getMyCharLen(resp)))
	return errors.New(errMsg)
}

func (n *WakuNode) GetNumConnectedPeers() (int, error) {
	peers, err := n.GetConnectedPeers()
	if err != nil {
		return 0, err
	}
	return len(peers), nil
}