api/agentic_network.go

//go:build agentic

// Package agentic provides high-performance RPC for agent networks
// Supports ZMQ, Cap'n Proto, and gRPC with post-quantum privacy
package agentic

import (
	"context"
	"crypto/rand"
	"encoding/binary"
	"fmt"
	"log"
	"sync"
	"time"

	// Protocol support
	"capnproto.org/go/capnp/v3"
	zmq "github.com/pebbe/zmq4"
	"google.golang.org/grpc"

	// Post-quantum cryptography
	"github.com/cloudflare/circl/kem/kyber/kyber1024"
	"github.com/cloudflare/circl/sign/dilithium/mode5"

	// Lux components
	"github.com/luxfi/api/agentic_capnp"
	"github.com/luxfi/crypto"
	"github.com/luxfi/p2p"
)

// AgenticNetwork manages high-performance agent communication
type AgenticNetwork struct {
	agentID      AgentID
	capabilities AgentCapabilities

	// Protocol handlers
	zmqSockets   map[string]*ZMQHandler
	capnpServers map[string]*CapnpHandler
	grpcServers  map[string]*grpc.Server

	// Post-quantum cryptography
	kemKeyPair *KEMKeyPair
	sigKeyPair *SignatureKeyPair

	// Zero-copy shared memory
	sharedMemory *SharedMemoryPool

	// Message routing
	routingTable *RoutingTable

	// Privacy and security
	mixerPool *MixerPool
	zkProver  *ZKProver

	mu sync.RWMutex
}

// Agent identity with post-quantum keys
type AgentID struct {
	PublicKey  []byte
	Address    string
	Reputation float64
	Stake      uint64
}

type AgentCapabilities struct {
	ComputeTypes    []ComputeType
	MaxMemory       uint64
	MaxCompute      uint64
	Specializations []string
	Protocols       []Protocol
	TrustLevel      TrustLevel
}

// Post-quantum key pairs
type KEMKeyPair struct {
	PublicKey  kyber1024.PublicKey
	PrivateKey kyber1024.PrivateKey
}

type SignatureKeyPair struct {
	PublicKey  mode5.PublicKey
	PrivateKey mode5.PrivateKey
}

// Protocol handlers
type ZMQHandler struct {
	socketType zmq.Type
	socket     *zmq.Socket
	endpoint   string
	options    ZMQOptions
}

type CapnpHandler struct {
	listener net.Listener
	server   *capnp.Server
	options  CapnpOptions
}

type ZMQOptions struct {
	SocketType        zmq.Type
	HighWaterMark     int64
	Linger            time.Duration
	ReconnectInterval time.Duration
	MaxReconnects     int
}

type CapnpOptions struct {
	Compression    CompressionType
	PackedEncoding bool
	TraversalLimit uint64
	NestingLimit   uint32
}

// NewAgenticNetwork creates a new high-performance agent network
func NewAgenticNetwork(config *NetworkConfig) (*AgenticNetwork, error) {
	// Generate post-quantum key pairs
	kemPub, kemPriv, err := kyber1024.GenerateKeyPair(rand.Reader)
	if err != nil {
		return nil, fmt.Errorf("failed to generate KEM key pair: %w", err)
	}

	sigPub, sigPriv, err := mode5.GenerateKey(rand.Reader)
	if err != nil {
		return nil, fmt.Errorf("failed to generate signature key pair: %w", err)
	}

	network := &AgenticNetwork{
		agentID: AgentID{
			PublicKey:  kemPub.Bytes(),
			Address:    config.Address,
			Reputation: 1.0,
			Stake:      config.InitialStake,
		},
		capabilities: config.Capabilities,
		kemKeyPair: &KEMKeyPair{
			PublicKey:  *kemPub,
			PrivateKey: *kemPriv,
		},
		sigKeyPair: &SignatureKeyPair{
			PublicKey:  *sigPub,
			PrivateKey: *sigPriv,
		},
		zmqSockets:   make(map[string]*ZMQHandler),
		capnpServers: make(map[string]*CapnpHandler),
		grpcServers:  make(map[string]*grpc.Server),
		sharedMemory: NewSharedMemoryPool(),
		routingTable: NewRoutingTable(),
		mixerPool:    NewMixerPool(),
		zkProver:     NewZKProver(),
	}

	return network, nil
}

// StartZMQEndpoint starts a ZeroMQ endpoint
func (an *AgenticNetwork) StartZMQEndpoint(name string, endpoint string, socketType zmq.Type) error {
	socket, err := zmq.NewSocket(socketType)
	if err != nil {
		return fmt.Errorf("failed to create ZMQ socket: %w", err)
	}

	// Configure socket options
	socket.SetLinger(5 * time.Second)
	socket.SetRcvhwm(10000)
	socket.SetSndhwm(10000)

	// Bind or connect based on socket type
	switch socketType {
	case zmq.REP, zmq.ROUTER, zmq.PUB, zmq.PULL:
		err = socket.Bind(endpoint)
	case zmq.REQ, zmq.DEALER, zmq.SUB, zmq.PUSH:
		err = socket.Connect(endpoint)
	default:
		return fmt.Errorf("unsupported socket type: %v", socketType)
	}

	if err != nil {
		return fmt.Errorf("failed to bind/connect ZMQ socket: %w", err)
	}

	handler := &ZMQHandler{
		socketType: socketType,
		socket:     socket,
		endpoint:   endpoint,
	}

	an.mu.Lock()
	an.zmqSockets[name] = handler
	an.mu.Unlock()

	// Start message handler goroutine
	go an.handleZMQMessages(name, handler)

	return nil
}

// StartCapnpEndpoint starts a Cap'n Proto endpoint
func (an *AgenticNetwork) StartCapnpEndpoint(name string, address string) error {
	listener, err := net.Listen("tcp", address)
	if err != nil {
		return fmt.Errorf("failed to listen on %s: %w", address, err)
	}

	// Create Cap'n Proto server
	server := &capnp.Server{
		Methods: an.createCapnpMethods(),
	}

	handler := &CapnpHandler{
		listener: listener,
		server:   server,
	}

	an.mu.Lock()
	an.capnpServers[name] = handler
	an.mu.Unlock()

	// Start serving
	go func() {
		log.Printf("Cap'n Proto server listening on %s", address)
		for {
			conn, err := listener.Accept()
			if err != nil {
				log.Printf("Failed to accept connection: %v", err)
				continue
			}
			go server.ServeConn(conn)
		}
	}()

	return nil
}

// StartgRPCEndpoint starts a gRPC endpoint
func (an *AgenticNetwork) StartgRPCEndpoint(name string, address string) error {
	listener, err := net.Listen("tcp", address)
	if err != nil {
		return fmt.Errorf("failed to listen on %s: %w", address, err)
	}

	// Create gRPC server with options
	server := grpc.NewServer(
		grpc.MaxRecvMsgSize(64*1024*1024), // 64MB
		grpc.MaxSendMsgSize(64*1024*1024), // 64MB
		grpc.KeepaliveParams(keepalive.ServerParameters{
			Time:    60 * time.Second,
			Timeout: 10 * time.Second,
		}),
	)

	// Register agentic service
	RegisterAgenticServiceServer(server, an)

	an.mu.Lock()
	an.grpcServers[name] = server
	an.mu.Unlock()

	// Start serving
	go func() {
		log.Printf("gRPC server listening on %s", address)
		if err := server.Serve(listener); err != nil {
			log.Printf("gRPC server error: %v", err)
		}
	}()

	return nil
}

// SendValueTransfer sends value with post-quantum privacy
func (an *AgenticNetwork) SendValueTransfer(ctx context.Context, transfer *ValueTransfer) error {
	// Create zero-knowledge proof for privacy
	zkProof, err := an.zkProver.CreateTransferProof(transfer)
	if err != nil {
		return fmt.Errorf("failed to create ZK proof: %w", err)
	}

	// Apply mixer for anonymity
	mixedTransfer, err := an.mixerPool.MixTransfer(transfer)
	if err != nil {
		return fmt.Errorf("failed to mix transfer: %w", err)
	}

	// Encrypt with post-quantum crypto
	encryptedTransfer, err := an.encryptPQ(mixedTransfer)
	if err != nil {
		return fmt.Errorf("failed to encrypt transfer: %w", err)
	}

	// Create Cap'n Proto message
	msg := &AgenticMessage{
		MessageID:   generateMessageID(),
		Timestamp:   uint64(time.Now().UnixNano()),
		SourceAgent: an.agentID,
		Payload:     &ValueTransferPayload{Transfer: encryptedTransfer, ZKProof: zkProof},
		Encryption:  encryptedTransfer.Encryption,
	}

	// Route and send
	return an.routeMessage(ctx, msg)
}

// RequestComputation requests computation from another agent
func (an *AgenticNetwork) RequestComputation(ctx context.Context, req *ComputationRequest) (*ComputationResult, error) {
	// Find suitable agents
	agents, err := an.discoverAgents(ctx, req.Requirements)
	if err != nil {
		return nil, fmt.Errorf("failed to discover agents: %w", err)
	}

	if len(agents) == 0 {
		return nil, fmt.Errorf("no suitable agents found")
	}

	// Select best agent based on price, latency, reputation
	bestAgent := an.selectBestAgent(agents, req.Requirements)

	// Prepare computation with privacy
	privacyConfig := req.Privacy
	var encryptedInput []byte

	switch privacyConfig.InputPrivacy {
	case PrivacyLevelFHE:
		// Fully homomorphic encryption
		encryptedInput, err = an.encryptFHE(req.InputData, bestAgent.PublicKey)
	case PrivacyLevelMPC:
		// Multi-party computation
		encryptedInput, err = an.prepareMPC(req.InputData, privacyConfig.MPC)
	case PrivacyLevelTEE:
		// Trusted execution environment
		encryptedInput, err = an.prepareTEE(req.InputData, privacyConfig.TEE)
	default:
		// Standard post-quantum encryption
		encryptedInput, err = an.encryptPQ(req.InputData)
	}

	if err != nil {
		return nil, fmt.Errorf("failed to prepare computation input: %w", err)
	}

	// Create computation message
	computeMsg := &AgenticMessage{
		MessageID:   generateMessageID(),
		Timestamp:   uint64(time.Now().UnixNano()),
		SourceAgent: an.agentID,
		TargetAgent: bestAgent.ID,
		Payload: &ComputationPayload{
			Request:        req,
			EncryptedInput: encryptedInput,
		},
	}

	// Send computation request
	response, err := an.sendComputeRequest(ctx, computeMsg)
	if err != nil {
		return nil, fmt.Errorf("failed to send computation request: %w", err)
	}

	// Decrypt and verify result
	result, err := an.processComputeResponse(response, privacyConfig)
	if err != nil {
		return nil, fmt.Errorf("failed to process computation response: %w", err)
	}

	return result, nil
}

// ShareIntelligence shares AI/ML intelligence with other agents
func (an *AgenticNetwork) ShareIntelligence(ctx context.Context, intel *IntelligenceShare) error {
	// Store in shared memory for zero-copy distribution
	sharedID := an.sharedMemory.Store(intel.Data.Data)

	// Create intelligence share message
	msg := &AgenticMessage{
		MessageID:   generateMessageID(),
		Timestamp:   uint64(time.Now().UnixNano()),
		SourceAgent: an.agentID,
		Payload: &IntelligencePayload{
			ShareType:  intel.ShareType,
			Data:       intel.Data,
			Rights:     intel.Rights,
			Provenance: intel.Provenance,
			Incentives: intel.Incentives,
		},
		SharedDataRef: &SharedDataReference{
			SharedID: sharedID,
			Size:     uint64(len(intel.Data.Data)),
		},
	}

	// Broadcast to interested agents
	return an.broadcastIntelligence(ctx, msg)
}

// CoordinateAgents coordinates multiple agents for complex tasks
func (an *AgenticNetwork) CoordinateAgents(ctx context.Context, coordination *CoordinationMessage) (*CoordinationResult, error) {
	// Implement consensus mechanism
	switch coordination.Proposal.VotingMechanism {
	case VotingMechanismQuadratic:
		return an.runQuadraticVoting(ctx, coordination)
	case VotingMechanismWeighted:
		return an.runWeightedVoting(ctx, coordination)
	case VotingMechanismLiquid:
		return an.runLiquidDemocracy(ctx, coordination)
	default:
		return an.runSimpleVoting(ctx, coordination)
	}
}

// ZMQ message handler
func (an *AgenticNetwork) handleZMQMessages(name string, handler *ZMQHandler) {
	for {
		// Receive message
		msg, err := handler.socket.RecvBytes(0)
		if err != nil {
			log.Printf("ZMQ receive error: %v", err)
			continue
		}

		// Parse Cap'n Proto message
		capnpMsg, err := capnp.Unmarshal(msg)
		if err != nil {
			log.Printf("Failed to unmarshal Cap'n Proto message: %v", err)
			continue
		}

		// Process message
		go an.processMessage(capnpMsg)
	}
}

// Cap'n Proto methods
func (an *AgenticNetwork) createCapnpMethods() capnp.Method {
	return capnp.Method{
		"sendMessage":    an.handleCapnpMessage,
		"queryAgents":    an.handleAgentQuery,
		"requestCompute": an.handleComputeRequest,
	}
}

func (an *AgenticNetwork) handleCapnpMessage(ctx context.Context, call capnp.Call) error {
	// Handle incoming Cap'n Proto message
	params, err := call.Params()
	if err != nil {
		return err
	}

	// Extract message
	agenticMsg, err := ReadRootAgenticMessage(params.Struct())
	if err != nil {
		return err
	}

	// Process based on payload type
	return an.processAgenticMessage(ctx, agenticMsg)
}

// Post-quantum encryption
func (an *AgenticNetwork) encryptPQ(data interface{}) (*PQEncryption, error) {
	// Serialize data
	plaintext, err := an.serialize(data)
	if err != nil {
		return nil, err
	}

	// Generate ephemeral key pair
	ephemeralPub, ephemeralPriv, err := kyber1024.GenerateKeyPair(rand.Reader)
	if err != nil {
		return nil, err
	}

	// Key encapsulation
	ciphertext, sharedSecret, err := kyber1024.EncryptTo(ephemeralPub, rand.Reader, plaintext)
	if err != nil {
		return nil, err
	}

	// Create signature
	signature, err := an.sigKeyPair.PrivateKey.Sign(plaintext)
	if err != nil {
		return nil, err
	}

	return &PQEncryption{
		Algorithm:     PQAlgorithmKyber1024,
		EncryptedData: ciphertext,
		KeyExchange: &PQKeyExchange{
			Algorithm:  PQAlgorithmKyber1024,
			PublicKey:  ephemeralPub.Bytes(),
			SessionKey: sharedSecret,
		},
		Signature: &PQSignature{
			Algorithm: PQAlgorithmDilithium5,
			Signature: signature,
			PublicKey: an.sigKeyPair.PublicKey.Bytes(),
		},
	}, nil
}

// FHE encryption for homomorphic computation
func (an *AgenticNetwork) encryptFHE(data interface{}, recipientPubKey []byte) ([]byte, error) {
	// Implement FHE encryption using BFV/CKKS schemes
	// This would integrate with a library like Microsoft SEAL or Lattigo
	return nil, fmt.Errorf("FHE not yet implemented")
}

// MPC preparation
func (an *AgenticNetwork) prepareMPC(data interface{}, mpcConfig *MPCConfig) ([]byte, error) {
	// Implement MPC secret sharing
	return nil, fmt.Errorf("MPC not yet implemented")
}

// TEE preparation
func (an *AgenticNetwork) prepareTEE(data interface{}, teeConfig *TEEConfig) ([]byte, error) {
	// Implement TEE attestation and secure computation
	return nil, fmt.Errorf("TEE not yet implemented")
}

// Agent discovery
func (an *AgenticNetwork) discoverAgents(ctx context.Context, requirements *ComputeRequirements) ([]*AgentMatch, error) {
	// Query network for suitable agents
	query := &DiscoveryQuery{
		Criteria: &SearchCriteria{
			Capabilities: requirements.Specialized,
			TrustLevel:   requirements.TrustRequired,
		},
		MaxResults: 10,
		Timeout:    30,
	}

	return an.queryNetwork(ctx, query)
}

// Network query
func (an *AgenticNetwork) queryNetwork(ctx context.Context, query *DiscoveryQuery) ([]*AgentMatch, error) {
	// Broadcast discovery query via multiple protocols
	var matches []*AgentMatch

	// Query via ZMQ
	zmqMatches, err := an.queryViaZMQ(ctx, query)
	if err == nil {
		matches = append(matches, zmqMatches...)
	}

	// Query via Cap'n Proto
	capnpMatches, err := an.queryViaCapnp(ctx, query)
	if err == nil {
		matches = append(matches, capnpMatches...)
	}

	// Query via gRPC
	grpcMatches, err := an.queryViagRPC(ctx, query)
	if err == nil {
		matches = append(matches, grpcMatches...)
	}

	// Deduplicate and rank
	return an.rankAgents(matches), nil
}

// Utility functions
func generateMessageID() uint64 {
	var buf [8]byte
	rand.Read(buf[:])
	return binary.LittleEndian.Uint64(buf[:])
}

func (an *AgenticNetwork) serialize(data interface{}) ([]byte, error) {
	// Implement efficient serialization (protobuf, cap'n proto, or msgpack)
	return nil, fmt.Errorf("serialization not implemented")
}

func (an *AgenticNetwork) rankAgents(matches []*AgentMatch) []*AgentMatch {
	// Implement agent ranking based on reputation, price, latency, etc.
	return matches
}

// NetworkConfig for initialization
type NetworkConfig struct {
	Address      string
	InitialStake uint64
	Capabilities AgentCapabilities
	Protocols    []Protocol
	Security     SecurityConfig
}

// Privacy components (placeholder implementations)
type MixerPool struct{}

func NewMixerPool() *MixerPool { return &MixerPool{} }
func (mp *MixerPool) MixTransfer(transfer *ValueTransfer) (*ValueTransfer, error) {
	return transfer, nil
}

type ZKProver struct{}

func NewZKProver() *ZKProver { return &ZKProver{} }
func (zk *ZKProver) CreateTransferProof(transfer *ValueTransfer) (*ZKProof, error) {
	return &ZKProof{}, nil
}

type RoutingTable struct{}

func NewRoutingTable() *RoutingTable { return &RoutingTable{} }

// Placeholder types (implement based on actual requirements)
type (
	Protocol            = string
	ComputeType         = string
	TrustLevel          = string
	ValueTransfer       = interface{}
	ComputationRequest  = interface{}
	ComputationResult   = interface{}
	IntelligenceShare   = interface{}
	CoordinationMessage = interface{}
	CoordinationResult  = interface{}
	AgentMatch          = interface{}
	ZKProof             = interface{}
	SecurityConfig      = interface{}
)