// +build nimbus

package shhext

import (
	"context"
	"github.com/status-im/status-go/protocol/common"

	"github.com/ethereum/go-ethereum/log"

	"github.com/status-im/status-go/eth-node/types"
	enstypes "github.com/status-im/status-go/eth-node/types/ens"
	"github.com/status-im/status-go/protocol"
	"github.com/status-im/status-go/protocol/encryption/multidevice"
	"github.com/status-im/status-go/protocol/transport"
)

// -----
// PUBLIC API
// -----

// NimbusPublicAPI extends whisper public API.
type NimbusPublicAPI struct {
	service   *NimbusService
	publicAPI types.PublicWhisperAPI
	log       log.Logger
}

// NewPublicAPI returns instance of the public API.
func NewNimbusPublicAPI(s *NimbusService) *NimbusPublicAPI {
	return &NimbusPublicAPI{
		service:   s,
		publicAPI: s.w.PublicWhisperAPI(),
		log:       log.New("package", "status-go/services/sshext.NimbusPublicAPI"),
	}
}

// func (api *NimbusPublicAPI) getPeer(rawurl string) (*enode.Node, error) {
// 	if len(rawurl) == 0 {
// 		return mailservers.GetFirstConnected(api.service.server, api.service.peerStore)
// 	}
// 	return enode.ParseV4(rawurl)
// }

// // RetryConfig specifies configuration for retries with timeout and max amount of retries.
// type RetryConfig struct {
// 	BaseTimeout time.Duration
// 	// StepTimeout defines duration increase per each retry.
// 	StepTimeout time.Duration
// 	MaxRetries  int
// }

// RequestMessagesSync repeats MessagesRequest using configuration in retry conf.
// func (api *NimbusPublicAPI) RequestMessagesSync(conf RetryConfig, r MessagesRequest) (MessagesResponse, error) {
// 	var resp MessagesResponse

// 	shh := api.service.w
// 	events := make(chan types.EnvelopeEvent, 10)
// 	var (
// 		requestID types.HexBytes
// 		err       error
// 		retries   int
// 	)
// 	for retries <= conf.MaxRetries {
// 		sub := shh.SubscribeEnvelopeEvents(events)
// 		r.Timeout = conf.BaseTimeout + conf.StepTimeout*time.Duration(retries)
// 		timeout := r.Timeout
// 		// FIXME this weird conversion is required because MessagesRequest expects seconds but defines time.Duration
// 		r.Timeout = time.Duration(int(r.Timeout.Seconds()))
// 		requestID, err = api.RequestMessages(context.Background(), r)
// 		if err != nil {
// 			sub.Unsubscribe()
// 			return resp, err
// 		}
// 		mailServerResp, err := waitForExpiredOrCompleted(types.BytesToHash(requestID), events, timeout)
// 		sub.Unsubscribe()
// 		if err == nil {
// 			resp.Cursor = hex.EncodeToString(mailServerResp.Cursor)
// 			resp.Error = mailServerResp.Error
// 			return resp, nil
// 		}
// 		retries++
// 		api.log.Error("[RequestMessagesSync] failed", "err", err, "retries", retries)
// 	}
// 	return resp, fmt.Errorf("failed to request messages after %d retries", retries)
// }

// func waitForExpiredOrCompleted(requestID types.Hash, events chan types.EnvelopeEvent, timeout time.Duration) (*types.MailServerResponse, error) {
// 	expired := fmt.Errorf("request %x expired", requestID)
// 	after := time.NewTimer(timeout)
// 	defer after.Stop()
// 	for {
// 		var ev types.EnvelopeEvent
// 		select {
// 		case ev = <-events:
// 		case <-after.C:
// 			return nil, expired
// 		}
// 		if ev.Hash != requestID {
// 			continue
// 		}
// 		switch ev.Event {
// 		case types.EventMailServerRequestCompleted:
// 			data, ok := ev.Data.(*types.MailServerResponse)
// 			if ok {
// 				return data, nil
// 			}
// 			return nil, errors.New("invalid event data type")
// 		case types.EventMailServerRequestExpired:
// 			return nil, expired
// 		}
// 	}
// }

// // RequestMessages sends a request for historic messages to a MailServer.
// func (api *NimbusPublicAPI) RequestMessages(_ context.Context, r MessagesRequest) (types.HexBytes, error) {
// 	api.log.Info("RequestMessages", "request", r)
// 	shh := api.service.w
// 	now := api.service.w.GetCurrentTime()
// 	r.setDefaults(now)

// 	if r.From > r.To {
// 		return nil, fmt.Errorf("Query range is invalid: from > to (%d > %d)", r.From, r.To)
// 	}

// 	mailServerNode, err := api.getPeer(r.MailServerPeer)
// 	if err != nil {
// 		return nil, fmt.Errorf("%v: %v", ErrInvalidMailServerPeer, err)
// 	}

// 	var (
// 		symKey    []byte
// 		publicKey *ecdsa.PublicKey
// 	)

// 	if r.SymKeyID != "" {
// 		symKey, err = shh.GetSymKey(r.SymKeyID)
// 		if err != nil {
// 			return nil, fmt.Errorf("%v: %v", ErrInvalidSymKeyID, err)
// 		}
// 	} else {
// 		publicKey = mailServerNode.Pubkey()
// 	}

// 	payload, err := makeMessagesRequestPayload(r)
// 	if err != nil {
// 		return nil, err
// 	}

// 	envelope, err := makeEnvelop(
// 		payload,
// 		symKey,
// 		publicKey,
// 		api.service.nodeID,
// 		shh.MinPow(),
// 		now,
// 	)
// 	if err != nil {
// 		return nil, err
// 	}
// 	hash := envelope.Hash()

// 	if !r.Force {
// 		err = api.service.requestsRegistry.Register(hash, r.Topics)
// 		if err != nil {
// 			return nil, err
// 		}
// 	}

// 	if err := shh.RequestHistoricMessagesWithTimeout(mailServerNode.ID().Bytes(), envelope, r.Timeout*time.Second); err != nil {
// 		if !r.Force {
// 			api.service.requestsRegistry.Unregister(hash)
// 		}
// 		return nil, err
// 	}

// 	return hash[:], nil
// }

// // createSyncMailRequest creates SyncMailRequest. It uses a full bloom filter
// // if no topics are given.
// func createSyncMailRequest(r SyncMessagesRequest) (types.SyncMailRequest, error) {
// 	var bloom []byte
// 	if len(r.Topics) > 0 {
// 		bloom = topicsToBloom(r.Topics...)
// 	} else {
// 		bloom = types.MakeFullNodeBloom()
// 	}

// 	cursor, err := hex.DecodeString(r.Cursor)
// 	if err != nil {
// 		return types.SyncMailRequest{}, err
// 	}

// 	return types.SyncMailRequest{
// 		Lower:  r.From,
// 		Upper:  r.To,
// 		Bloom:  bloom,
// 		Limit:  r.Limit,
// 		Cursor: cursor,
// 	}, nil
// }

// func createSyncMessagesResponse(r types.SyncEventResponse) SyncMessagesResponse {
// 	return SyncMessagesResponse{
// 		Cursor: hex.EncodeToString(r.Cursor),
// 		Error:  r.Error,
// 	}
// }

// // SyncMessages sends a request to a given MailServerPeer to sync historic messages.
// // MailServerPeers needs to be added as a trusted peer first.
// func (api *NimbusPublicAPI) SyncMessages(ctx context.Context, r SyncMessagesRequest) (SyncMessagesResponse, error) {
// 	log.Info("SyncMessages start", "request", r)

// 	var response SyncMessagesResponse

// 	mailServerEnode, err := enode.ParseV4(r.MailServerPeer)
// 	if err != nil {
// 		return response, fmt.Errorf("invalid MailServerPeer: %v", err)
// 	}
// 	mailServerID := mailServerEnode.ID().Bytes()

// 	request, err := createSyncMailRequest(r)
// 	if err != nil {
// 		return response, fmt.Errorf("failed to create a sync mail request: %v", err)
// 	}

// 	for {
// 		log.Info("Sending a request to sync messages", "request", request)

// 		resp, err := api.service.syncMessages(ctx, mailServerID, request)
// 		if err != nil {
// 			return response, err
// 		}

// 		log.Info("Syncing messages response", "error", resp.Error, "cursor", fmt.Sprintf("%#x", resp.Cursor))

// 		if resp.Error != "" || len(resp.Cursor) == 0 || !r.FollowCursor {
// 			return createSyncMessagesResponse(resp), nil
// 		}

// 		request.Cursor = resp.Cursor
// 	}
// }

// ConfirmMessagesProcessedByID is a method to confirm that messages was consumed by
// the client side.
// TODO: this is broken now as it requires dedup ID while a message hash should be used.
func (api *NimbusPublicAPI) ConfirmMessagesProcessedByID(messageConfirmations []*Metadata) error {
	confirmationCount := len(messageConfirmations)
	dedupIDs := make([][]byte, confirmationCount)
	encryptionIDs := make([][]byte, confirmationCount)
	for i, confirmation := range messageConfirmations {
		dedupIDs[i] = confirmation.DedupID
		encryptionIDs[i] = confirmation.EncryptionID
	}
	return api.service.ConfirmMessagesProcessed(encryptionIDs)
}

// Post is used to send one-to-one for those who did not enabled device-to-device sync,
// in other words don't use PFS-enabled messages. Otherwise, SendDirectMessage is used.
// It's important to call NimbusPublicAPI.afterSend() so that the client receives a signal
// with confirmation that the message left the device.
func (api *NimbusPublicAPI) Post(ctx context.Context, newMessage types.NewMessage) (types.HexBytes, error) {
	return api.publicAPI.Post(ctx, newMessage)
}

func (api *NimbusPublicAPI) Join(chat protocol.Chat) error {
	return api.service.messenger.Join(chat)
}

func (api *NimbusPublicAPI) Leave(chat protocol.Chat) error {
	return api.service.messenger.Leave(chat)
}

func (api *NimbusPublicAPI) LeaveGroupChat(ctx Context, chatID string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.LeaveGroupChat(ctx, chatID)
}

func (api *NimbusPublicAPI) CreateGroupChatWithMembers(ctx Context, name string, members []string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.CreateGroupChatWithMembers(ctx, name, members)
}

func (api *NimbusPublicAPI) AddMembersToGroupChat(ctx Context, chatID string, members []string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.AddMembersToGroupChat(ctx, chatID, members)
}

func (api *NimbusPublicAPI) RemoveMemberFromGroupChat(ctx Context, chatID string, member string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.RemoveMemberFromGroupChat(ctx, chatID, member)
}

func (api *NimbusPublicAPI) AddAdminsToGroupChat(ctx Context, chatID string, members []string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.AddAdminsToGroupChat(ctx, chatID, members)
}

func (api *NimbusPublicAPI) ConfirmJoiningGroup(ctx context.Context, chatID string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.ConfirmJoiningGroup(ctx, chatID)
}

// func (api *NimbusPublicAPI) requestMessagesUsingPayload(request db.HistoryRequest, peer, symkeyID string, payload []byte, force bool, timeout time.Duration, topics []types.TopicType) (hash types.Hash, err error) {
// 	shh := api.service.w
// 	now := api.service.w.GetCurrentTime()

// 	mailServerNode, err := api.getPeer(peer)
// 	if err != nil {
// 		return hash, fmt.Errorf("%v: %v", ErrInvalidMailServerPeer, err)
// 	}

// 	var (
// 		symKey    []byte
// 		publicKey *ecdsa.PublicKey
// 	)

// 	if symkeyID != "" {
// 		symKey, err = shh.GetSymKey(symkeyID)
// 		if err != nil {
// 			return hash, fmt.Errorf("%v: %v", ErrInvalidSymKeyID, err)
// 		}
// 	} else {
// 		publicKey = mailServerNode.Pubkey()
// 	}

// 	envelope, err := makeEnvelop(
// 		payload,
// 		symKey,
// 		publicKey,
// 		api.service.nodeID,
// 		shh.MinPow(),
// 		now,
// 	)
// 	if err != nil {
// 		return hash, err
// 	}
// 	hash = envelope.Hash()

// 	err = request.Replace(hash)
// 	if err != nil {
// 		return hash, err
// 	}

// 	if !force {
// 		err = api.service.requestsRegistry.Register(hash, topics)
// 		if err != nil {
// 			return hash, err
// 		}
// 	}

// 	if err := shh.RequestHistoricMessagesWithTimeout(mailServerNode.ID().Bytes(), envelope, timeout); err != nil {
// 		if !force {
// 			api.service.requestsRegistry.Unregister(hash)
// 		}
// 		return hash, err
// 	}

// 	return hash, nil

// }

// // InitiateHistoryRequests is a stateful API for initiating history request for each topic.
// // Caller of this method needs to define only two parameters per each TopicRequest:
// // - Topic
// // - Duration in nanoseconds. Will be used to determine starting time for history request.
// // After that status-go will guarantee that request for this topic and date will be performed.
// func (api *NimbusPublicAPI) InitiateHistoryRequests(parent context.Context, request InitiateHistoryRequestParams) (rst []types.HexBytes, err error) {
// 	tx := api.service.storage.NewTx()
// 	defer func() {
// 		if err == nil {
// 			err = tx.Commit()
// 		}
// 	}()
// 	ctx := NewContextFromService(parent, api.service, tx)
// 	requests, err := api.service.historyUpdates.CreateRequests(ctx, request.Requests)
// 	if err != nil {
// 		return nil, err
// 	}
// 	var (
// 		payload []byte
// 		hash    types.Hash
// 	)
// 	for i := range requests {
// 		req := requests[i]
// 		options := CreateTopicOptionsFromRequest(req)
// 		bloom := options.ToBloomFilterOption()
// 		payload, err = bloom.ToMessagesRequestPayload()
// 		if err != nil {
// 			return rst, err
// 		}
// 		hash, err = api.requestMessagesUsingPayload(req, request.Peer, request.SymKeyID, payload, request.Force, request.Timeout, options.Topics())
// 		if err != nil {
// 			return rst, err
// 		}
// 		rst = append(rst, hash.Bytes())
// 	}
// 	return rst, err
// }

// // CompleteRequest client must mark request completed when all envelopes were processed.
// func (api *NimbusPublicAPI) CompleteRequest(parent context.Context, hex string) (err error) {
// 	tx := api.service.storage.NewTx()
// 	ctx := NewContextFromService(parent, api.service, tx)
// 	err = api.service.historyUpdates.UpdateFinishedRequest(ctx, types.HexToHash(hex))
// 	if err == nil {
// 		return tx.Commit()
// 	}
// 	return err
// }

func (api *NimbusPublicAPI) LoadFilters(parent context.Context, chats []*transport.Filter) ([]*transport.Filter, error) {
	return api.service.messenger.LoadFilters(chats)
}

func (api *NimbusPublicAPI) SaveChat(parent context.Context, chat *protocol.Chat) error {
	api.log.Info("saving chat", "chat", chat)
	return api.service.messenger.SaveChat(chat)
}

func (api *NimbusPublicAPI) Chats(parent context.Context) []*protocol.Chat {
	return api.service.messenger.Chats()
}

func (api *NimbusPublicAPI) DeleteChat(parent context.Context, chatID string) error {
	return api.service.messenger.DeleteChat(chatID)
}

func (api *NimbusPublicAPI) SaveContact(parent context.Context, contact *protocol.Contact) error {
	return api.service.messenger.SaveContact(contact)
}

func (api *NimbusPublicAPI) BlockContact(parent context.Context, contact *protocol.Contact) ([]*protocol.Chat, error) {
	api.log.Info("blocking contact", "contact", contact.ID)
	return api.service.messenger.BlockContact(contact)
}

func (api *NimbusPublicAPI) Contacts(parent context.Context) []*protocol.Contact {
	return api.service.messenger.Contacts()
}

func (api *NimbusPublicAPI) RemoveFilters(parent context.Context, chats []*transport.Filter) error {
	return api.service.messenger.RemoveFilters(chats)
}

// EnableInstallation enables an installation for multi-device sync.
func (api *NimbusPublicAPI) EnableInstallation(installationID string) error {
	return api.service.messenger.EnableInstallation(installationID)
}

// DisableInstallation disables an installation for multi-device sync.
func (api *NimbusPublicAPI) DisableInstallation(installationID string) error {
	return api.service.messenger.DisableInstallation(installationID)
}

// GetOurInstallations returns all the installations available given an identity
func (api *NimbusPublicAPI) GetOurInstallations() []*multidevice.Installation {
	return api.service.messenger.Installations()
}

// SetInstallationMetadata sets the metadata for our own installation
func (api *NimbusPublicAPI) SetInstallationMetadata(installationID string, data *multidevice.InstallationMetadata) error {
	return api.service.messenger.SetInstallationMetadata(installationID, data)
}

// VerifyENSNames takes a list of ensdetails and returns whether they match the public key specified
func (api *NimbusPublicAPI) VerifyENSNames(details []enstypes.ENSDetails) (map[string]enstypes.ENSResponse, error) {
	return api.service.messenger.VerifyENSNames(api.service.config.VerifyENSURL, ensContractAddress, details)
}

type ApplicationMessagesResponse struct {
	Messages []*common.Message `json:"messages"`
	Cursor   string            `json:"cursor"`
}

func (api *NimbusPublicAPI) ChatMessages(chatID, cursor string, limit int) (*ApplicationMessagesResponse, error) {
	messages, cursor, err := api.service.messenger.MessageByChatID(chatID, cursor, limit)
	if err != nil {
		return nil, err
	}

	return &ApplicationMessagesResponse{
		Messages: messages,
		Cursor:   cursor,
	}, nil
}

func (api *NimbusPublicAPI) DeleteMessage(id string) error {
	return api.service.messenger.DeleteMessage(id)
}

func (api *NimbusPublicAPI) DeleteMessagesByChatID(id string) error {
	return api.service.messenger.DeleteMessagesByChatID(id)
}

func (api *NimbusPublicAPI) MarkMessagesSeen(chatID string, ids []string) error {
	return api.service.messenger.MarkMessagesSeen(chatID, ids)
}

func (api *NimbusPublicAPI) UpdateMessageOutgoingStatus(id, newOutgoingStatus string) error {
	return api.service.messenger.UpdateMessageOutgoingStatus(id, newOutgoingStatus)
}

func (api *PublicAPI) StartMessenger() error {
	return api.service.StartMessenger()
}

func (api *NimbusPublicAPI) SendChatMessage(ctx context.Context, message *common.Message) (*protocol.MessengerResponse, error) {
	return api.service.messenger.SendChatMessage(ctx, message)
}

func (api *NimbusPublicAPI) ReSendChatMessage(ctx context.Context, messageID string) error {
	return api.service.messenger.ReSendChatMessage(ctx, messageID)
}

func (api *NimbusPublicAPI) RequestTransaction(ctx context.Context, chatID, value, contract, address string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.RequestTransaction(ctx, chatID, value, contract, address)
}

func (api *NimbusPublicAPI) RequestAddressForTransaction(ctx context.Context, chatID, from, value, contract string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.RequestAddressForTransaction(ctx, chatID, from, value, contract)
}

func (api *NimbusPublicAPI) DeclineRequestAddressForTransaction(ctx context.Context, messageID string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.DeclineRequestAddressForTransaction(ctx, messageID)
}

func (api *NimbusPublicAPI) DeclineRequestTransaction(ctx context.Context, messageID string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.DeclineRequestTransaction(ctx, messageID)
}

func (api *NimbusPublicAPI) AcceptRequestAddressForTransaction(ctx context.Context, messageID, address string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.AcceptRequestAddressForTransaction(ctx, messageID, address)
}

func (api *NimbusPublicAPI) SendTransaction(ctx context.Context, chatID, value, contract, transactionHash string, signature types.HexBytes) (*protocol.MessengerResponse, error) {
	return api.service.messenger.SendTransaction(ctx, chatID, value, contract, transactionHash, signature)
}

func (api *NimbusPublicAPI) AcceptRequestTransaction(ctx context.Context, transactionHash, messageID string, signature types.HexBytes) (*protocol.MessengerResponse, error) {
	return api.service.messenger.AcceptRequestTransaction(ctx, transactionHash, messageID, signature)
}

func (api *NimbusPublicAPI) SendContactUpdates(ctx context.Context, name, picture string) error {
	return api.service.messenger.SendContactUpdates(ctx, name, picture)
}

func (api *NimbusPublicAPI) SendContactUpdate(ctx context.Context, contactID, name, picture string) (*protocol.MessengerResponse, error) {
	return api.service.messenger.SendContactUpdate(ctx, contactID, name, picture)
}

func (api *NimbusPublicAPI) SendPairInstallation(ctx context.Context) (*protocol.MessengerResponse, error) {
	return api.service.messenger.SendPairInstallation(ctx)
}

func (api *NimbusPublicAPI) SyncDevices(ctx context.Context, name, picture string) error {
	return api.service.messenger.SyncDevices(ctx, name, picture)
}

// -----
// HELPER
// -----

// makeEnvelop makes an envelop for a historic messages request.
// Symmetric key is used to authenticate to MailServer.
// PK is the current node ID.
// func makeEnvelop(
// 	payload []byte,
// 	symKey []byte,
// 	publicKey *ecdsa.PublicKey,
// 	nodeID *ecdsa.PrivateKey,
// 	pow float64,
// 	now time.Time,
// ) (types.Envelope, error) {
// 	params := whisper.MessageParams{
// 		PoW:      pow,
// 		Payload:  payload,
// 		WorkTime: defaultWorkTime,
// 		Src:      nodeID,
// 	}
// 	// Either symKey or public key is required.
// 	// This condition is verified in `message.Wrap()` method.
// 	if len(symKey) > 0 {
// 		params.KeySym = symKey
// 	} else if publicKey != nil {
// 		params.Dst = publicKey
// 	}
// 	message, err := whisper.NewSentMessage(&params)
// 	if err != nil {
// 		return nil, err
// 	}
// 	envelope, err := message.Wrap(&params, now)
// 	if err != nil {
// 		return nil, err
// 	}
// 	return nimbusbridge.NewNimbusEnvelopeWrapper(envelope), nil
// }

// // makeMessagesRequestPayload makes a specific payload for MailServer
// // to request historic messages.
// func makeMessagesRequestPayload(r MessagesRequest) ([]byte, error) {
// 	cursor, err := hex.DecodeString(r.Cursor)
// 	if err != nil {
// 		return nil, fmt.Errorf("invalid cursor: %v", err)
// 	}

// 	if len(cursor) > 0 && len(cursor) != mailserver.CursorLength {
// 		return nil, fmt.Errorf("invalid cursor size: expected %d but got %d", mailserver.CursorLength, len(cursor))
// 	}

// 	payload := mailserver.MessagesRequestPayload{
// 		Lower:  r.From,
// 		Upper:  r.To,
// 		Bloom:  createBloomFilter(r),
// 		Limit:  r.Limit,
// 		Cursor: cursor,
// 		// Client must tell the MailServer if it supports batch responses.
// 		// This can be removed in the future.
// 		Batch: true,
// 	}

// 	return rlp.EncodeToBytes(payload)
// }

// func createBloomFilter(r MessagesRequest) []byte {
// 	if len(r.Topics) > 0 {
// 		return topicsToBloom(r.Topics...)
// 	}

// 	return types.TopicToBloom(r.Topic)
// }

// func topicsToBloom(topics ...types.TopicType) []byte {
// 	i := new(big.Int)
// 	for _, topic := range topics {
// 		bloom := types.TopicToBloom(topic)
// 		i.Or(i, new(big.Int).SetBytes(bloom[:]))
// 	}

// 	combined := make([]byte, types.BloomFilterSize)
// 	data := i.Bytes()
// 	copy(combined[types.BloomFilterSize-len(data):], data[:])

// 	return combined
// }