// Package distribution provides comprehensive security for distributed context operations
package distribution

import (
	"context"
	"crypto/rand"
	"crypto/tls"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/json"
	"fmt"
	"math/big"
	"net"
	"sync"
	"time"

	"chorus.services/bzzz/pkg/config"
	"chorus.services/bzzz/pkg/crypto"
)

// SecurityManager handles all security aspects of the distributed system
type SecurityManager struct {
	mu                sync.RWMutex
	config            *config.Config
	tlsConfig         *TLSConfig
	authManager       *AuthenticationManager
	authzManager      *AuthorizationManager
	auditLogger       *SecurityAuditLogger
	nodeAuth          *NodeAuthentication
	encryption        *DistributionEncryption
	certificateAuth   *CertificateAuthority
	
	// Security state
	trustedNodes      map[string]*TrustedNode
	activeSessions    map[string]*SecuritySession
	securityPolicies  map[string]*SecurityPolicy
	threatDetector    *ThreatDetector
	
	// Configuration
	tlsEnabled        bool
	mutualTLSEnabled  bool
	auditingEnabled   bool
	encryptionEnabled bool
}

// TLSConfig manages TLS configuration for secure communications
type TLSConfig struct {
	ServerConfig      *tls.Config
	ClientConfig      *tls.Config
	CertificatePath   string
	PrivateKeyPath    string
	CAPath            string
	MinTLSVersion     uint16
	CipherSuites      []uint16
	CurvePreferences  []tls.CurveID
	ClientAuth        tls.ClientAuthType
	VerifyConnection  func(tls.ConnectionState) error
}

// AuthenticationManager handles node and user authentication
type AuthenticationManager struct {
	mu                 sync.RWMutex
	providers          map[string]AuthProvider
	tokenValidator     TokenValidator
	sessionManager     *SessionManager
	multiFactorAuth    *MultiFactorAuth
	credentialStore    *CredentialStore
	loginAttempts      map[string]*LoginAttempts
	authPolicies       map[string]*AuthPolicy
}

// AuthProvider interface for different authentication methods
type AuthProvider interface {
	Authenticate(ctx context.Context, credentials *Credentials) (*AuthResult, error)
	ValidateToken(ctx context.Context, token string) (*TokenClaims, error)
	RefreshToken(ctx context.Context, refreshToken string) (*TokenPair, error)
	Name() string
	IsEnabled() bool
}

// Credentials represents authentication credentials
type Credentials struct {
	Type         CredentialType             `json:"type"`
	Username     string                     `json:"username,omitempty"`
	Password     string                     `json:"password,omitempty"`
	Token        string                     `json:"token,omitempty"`
	Certificate  *x509.Certificate          `json:"certificate,omitempty"`
	Signature    []byte                     `json:"signature,omitempty"`
	Challenge    string                     `json:"challenge,omitempty"`
	Metadata     map[string]interface{}     `json:"metadata,omitempty"`
}

// CredentialType represents different types of credentials
type CredentialType string

const (
	CredentialTypePassword    CredentialType = "password"
	CredentialTypeToken       CredentialType = "token"
	CredentialTypeCertificate CredentialType = "certificate"
	CredentialTypeSignature   CredentialType = "signature"
	CredentialTypeMFA         CredentialType = "mfa"
	CredentialTypeAPIKey      CredentialType = "api_key"
)

// AuthResult represents the result of authentication
type AuthResult struct {
	Success        bool                       `json:"success"`
	UserID         string                     `json:"user_id"`
	Roles          []string                   `json:"roles"`
	Permissions    []string                   `json:"permissions"`
	TokenPair      *TokenPair                 `json:"token_pair"`
	SessionID      string                     `json:"session_id"`
	ExpiresAt      time.Time                  `json:"expires_at"`
	Metadata       map[string]interface{}     `json:"metadata"`
	FailureReason  string                     `json:"failure_reason,omitempty"`
}

// TokenPair represents access and refresh tokens
type TokenPair struct {
	AccessToken  string    `json:"access_token"`
	RefreshToken string    `json:"refresh_token"`
	TokenType    string    `json:"token_type"`
	ExpiresIn    int64     `json:"expires_in"`
	IssuedAt     time.Time `json:"issued_at"`
}

// TokenClaims represents JWT token claims
type TokenClaims struct {
	UserID      string                 `json:"user_id"`
	Roles       []string               `json:"roles"`
	Permissions []string               `json:"permissions"`
	Issuer      string                 `json:"issuer"`
	Subject     string                 `json:"subject"`
	Audience    []string               `json:"audience"`
	ExpiresAt   time.Time              `json:"expires_at"`
	IssuedAt    time.Time              `json:"issued_at"`
	NotBefore   time.Time              `json:"not_before"`
	Claims      map[string]interface{} `json:"claims"`
}

// AuthorizationManager handles authorization and access control
type AuthorizationManager struct {
	mu               sync.RWMutex
	policyEngine     PolicyEngine
	rbacManager      *RBACManager
	aclManager       *ACLManager
	resourceManager  *ResourceManager
	permissionCache  *PermissionCache
	authzPolicies    map[string]*AuthorizationPolicy
}

// PolicyEngine interface for policy evaluation
type PolicyEngine interface {
	Evaluate(ctx context.Context, request *AuthorizationRequest) (*AuthorizationResult, error)
	LoadPolicies(policies []*AuthorizationPolicy) error
	ValidatePolicy(policy *AuthorizationPolicy) error
}

// AuthorizationRequest represents an authorization request
type AuthorizationRequest struct {
	UserID      string                 `json:"user_id"`
	Roles       []string               `json:"roles"`
	Resource    string                 `json:"resource"`
	Action      string                 `json:"action"`
	Context     map[string]interface{} `json:"context"`
	RequestTime time.Time              `json:"request_time"`
}

// AuthorizationResult represents the result of authorization
type AuthorizationResult struct {
	Decision       AuthorizationDecision      `json:"decision"`
	Reason         string                     `json:"reason"`
	Policies       []string                   `json:"applied_policies"`
	Conditions     []string                   `json:"conditions"`
	TTL            time.Duration              `json:"ttl"`
	Metadata       map[string]interface{}     `json:"metadata"`
	EvaluationTime time.Duration              `json:"evaluation_time"`
}

// AuthorizationDecision represents authorization decisions
type AuthorizationDecision string

const (
	DecisionAllow  AuthorizationDecision = "allow"
	DecisionDeny   AuthorizationDecision = "deny"
	DecisionUnsure AuthorizationDecision = "unsure"
)

// SecurityAuditLogger handles security event logging
type SecurityAuditLogger struct {
	mu            sync.RWMutex
	loggers       []SecurityLogger
	eventBuffer   []*SecurityEvent
	alertManager  *SecurityAlertManager
	compliance    *ComplianceManager
	retention     *AuditRetentionPolicy
	enabled       bool
}

// SecurityLogger interface for security event logging
type SecurityLogger interface {
	Log(ctx context.Context, event *SecurityEvent) error
	Query(ctx context.Context, criteria *SecurityEventCriteria) ([]*SecurityEvent, error)
	Name() string
}

// SecurityEvent represents a security event
type SecurityEvent struct {
	EventID       string                 `json:"event_id"`
	EventType     SecurityEventType      `json:"event_type"`
	Severity      SecuritySeverity       `json:"severity"`
	Timestamp     time.Time              `json:"timestamp"`
	UserID        string                 `json:"user_id,omitempty"`
	NodeID        string                 `json:"node_id,omitempty"`
	Resource      string                 `json:"resource,omitempty"`
	Action        string                 `json:"action,omitempty"`
	Result        string                 `json:"result"`
	Message       string                 `json:"message"`
	Details       map[string]interface{} `json:"details"`
	IPAddress     string                 `json:"ip_address,omitempty"`
	UserAgent     string                 `json:"user_agent,omitempty"`
	SessionID     string                 `json:"session_id,omitempty"`
	RequestID     string                 `json:"request_id,omitempty"`
	Fingerprint   string                 `json:"fingerprint"`
}

// SecurityEventType represents different types of security events
type SecurityEventType string

const (
	EventTypeAuthentication    SecurityEventType = "authentication"
	EventTypeAuthorization     SecurityEventType = "authorization"
	EventTypeDataAccess        SecurityEventType = "data_access"
	EventTypeSystemAccess      SecurityEventType = "system_access"
	EventTypeSecurityViolation SecurityEventType = "security_violation"
	EventTypeThreats           SecurityEventType = "threats"
	EventTypeCompliance        SecurityEventType = "compliance"
	EventTypeConfiguration     SecurityEventType = "configuration"
)

// SecuritySeverity represents security event severity levels
type SecuritySeverity string

const (
	SeverityDebug    SecuritySeverity = "debug"
	SeverityInfo     SecuritySeverity = "info"
	SeverityWarning  SecuritySeverity = "warning"
	SeverityError    SecuritySeverity = "error"
	SeverityCritical SecuritySeverity = "critical"
	SeverityAlert    SecuritySeverity = "alert"
)

// NodeAuthentication handles node-to-node authentication
type NodeAuthentication struct {
	mu               sync.RWMutex
	certificateAuth  *CertificateAuth
	keyExchange      *KeyExchange
	trustStore       *TrustStore
	nodeRegistry     *NodeRegistry
	challengeManager *ChallengeManager
}

// TrustedNode represents a trusted node in the network
type TrustedNode struct {
	NodeID        string                 `json:"node_id"`
	PublicKey     []byte                 `json:"public_key"`
	Certificate   *x509.Certificate      `json:"certificate"`
	Roles         []string               `json:"roles"`
	Capabilities  []string               `json:"capabilities"`
	TrustLevel    TrustLevel             `json:"trust_level"`
	LastSeen      time.Time              `json:"last_seen"`
	VerifiedAt    time.Time              `json:"verified_at"`
	Metadata      map[string]interface{} `json:"metadata"`
	Status        NodeStatus             `json:"status"`
}

// TrustLevel represents the trust level of a node
type TrustLevel string

const (
	TrustLevelNone     TrustLevel = "none"
	TrustLevelLow      TrustLevel = "low"
	TrustLevelMedium   TrustLevel = "medium"
	TrustLevelHigh     TrustLevel = "high"
	TrustLevelCritical TrustLevel = "critical"
)

// SecuritySession represents an active security session
type SecuritySession struct {
	SessionID     string                 `json:"session_id"`
	UserID        string                 `json:"user_id"`
	NodeID        string                 `json:"node_id"`
	Roles         []string               `json:"roles"`
	Permissions   []string               `json:"permissions"`
	CreatedAt     time.Time              `json:"created_at"`
	ExpiresAt     time.Time              `json:"expires_at"`
	LastActivity  time.Time              `json:"last_activity"`
	IPAddress     string                 `json:"ip_address"`
	UserAgent     string                 `json:"user_agent"`
	Metadata      map[string]interface{} `json:"metadata"`
	Status        SessionStatus          `json:"status"`
}

// SessionStatus represents session status
type SessionStatus string

const (
	SessionStatusActive    SessionStatus = "active"
	SessionStatusExpired   SessionStatus = "expired"
	SessionStatusRevoked   SessionStatus = "revoked"
	SessionStatusSuspended SessionStatus = "suspended"
)

// ThreatDetector detects security threats and anomalies
type ThreatDetector struct {
	mu                  sync.RWMutex
	detectionRules      []*ThreatDetectionRule
	behaviorAnalyzer    *BehaviorAnalyzer
	anomalyDetector     *AnomalyDetector
	threatIntelligence  *ThreatIntelligence
	activeThreats       map[string]*ThreatEvent
	mitigationStrategies map[ThreatType]*MitigationStrategy
}

// ThreatDetectionRule represents a threat detection rule
type ThreatDetectionRule struct {
	RuleID       string                 `json:"rule_id"`
	Name         string                 `json:"name"`
	Description  string                 `json:"description"`
	ThreatType   ThreatType             `json:"threat_type"`
	Severity     SecuritySeverity       `json:"severity"`
	Conditions   []*ThreatCondition     `json:"conditions"`
	Actions      []*ThreatAction        `json:"actions"`
	Enabled      bool                   `json:"enabled"`
	CreatedAt    time.Time              `json:"created_at"`
	UpdatedAt    time.Time              `json:"updated_at"`
	Metadata     map[string]interface{} `json:"metadata"`
}

// ThreatType represents different types of threats
type ThreatType string

const (
	ThreatTypeBruteForce     ThreatType = "brute_force"
	ThreatTypeUnauthorized   ThreatType = "unauthorized_access"
	ThreatTypeDataExfiltration ThreatType = "data_exfiltration"
	ThreatTypeDoS            ThreatType = "denial_of_service"
	ThreatTypePrivilegeEscalation ThreatType = "privilege_escalation"
	ThreatTypeAnomalous      ThreatType = "anomalous_behavior"
	ThreatTypeMaliciousCode  ThreatType = "malicious_code"
	ThreatTypeInsiderThreat  ThreatType = "insider_threat"
)

// CertificateAuthority manages certificate generation and validation
type CertificateAuthority struct {
	mu            sync.RWMutex
	rootCA        *x509.Certificate
	rootKey       interface{}
	intermediateCA *x509.Certificate
	intermediateKey interface{}
	certStore     *CertificateStore
	crlManager    *CRLManager
	ocspResponder *OCSPResponder
}

// DistributionEncryption handles encryption for distributed communications
type DistributionEncryption struct {
	mu              sync.RWMutex
	keyManager      *DistributionKeyManager
	encryptionSuite *EncryptionSuite
	keyRotationPolicy *KeyRotationPolicy
	encryptionMetrics *EncryptionMetrics
}

// NewSecurityManager creates a new security manager
func NewSecurityManager(config *config.Config) (*SecurityManager, error) {
	if config == nil {
		return nil, fmt.Errorf("config is required")
	}

	sm := &SecurityManager{
		config:           config,
		trustedNodes:     make(map[string]*TrustedNode),
		activeSessions:   make(map[string]*SecuritySession),
		securityPolicies: make(map[string]*SecurityPolicy),
		tlsEnabled:       true,
		mutualTLSEnabled: true,
		auditingEnabled:  true,
		encryptionEnabled: true,
	}

	// Initialize components
	if err := sm.initializeComponents(); err != nil {
		return nil, fmt.Errorf("failed to initialize security components: %w", err)
	}

	return sm, nil
}

// initializeComponents initializes all security components
func (sm *SecurityManager) initializeComponents() error {
	var err error

	// Initialize TLS configuration
	sm.tlsConfig, err = sm.createTLSConfig()
	if err != nil {
		return fmt.Errorf("failed to create TLS config: %w", err)
	}

	// Initialize Certificate Authority
	sm.certificateAuth, err = NewCertificateAuthority(sm.config)
	if err != nil {
		return fmt.Errorf("failed to create certificate authority: %w", err)
	}

	// Initialize authentication manager
	sm.authManager, err = NewAuthenticationManager(sm.config)
	if err != nil {
		return fmt.Errorf("failed to create authentication manager: %w", err)
	}

	// Initialize authorization manager
	sm.authzManager, err = NewAuthorizationManager(sm.config)
	if err != nil {
		return fmt.Errorf("failed to create authorization manager: %w", err)
	}

	// Initialize audit logger
	sm.auditLogger, err = NewSecurityAuditLogger(sm.config)
	if err != nil {
		return fmt.Errorf("failed to create audit logger: %w", err)
	}

	// Initialize node authentication
	sm.nodeAuth, err = NewNodeAuthentication(sm.config, sm.certificateAuth)
	if err != nil {
		return fmt.Errorf("failed to create node authentication: %w", err)
	}

	// Initialize encryption
	sm.encryption, err = NewDistributionEncryption(sm.config)
	if err != nil {
		return fmt.Errorf("failed to create distribution encryption: %w", err)
	}

	// Initialize threat detector
	sm.threatDetector, err = NewThreatDetector(sm.config)
	if err != nil {
		return fmt.Errorf("failed to create threat detector: %w", err)
	}

	return nil
}

// createTLSConfig creates TLS configuration for secure communications
func (sm *SecurityManager) createTLSConfig() (*TLSConfig, error) {
	config := &TLSConfig{
		MinTLSVersion: tls.VersionTLS12,
		CipherSuites: []uint16{
			tls.TLS_AES_256_GCM_SHA384,
			tls.TLS_AES_128_GCM_SHA256,
			tls.TLS_CHACHA20_POLY1305_SHA256,
			tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
			tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
			tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
			tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
		},
		CurvePreferences: []tls.CurveID{
			tls.X25519,
			tls.CurveP384,
			tls.CurveP256,
		},
		ClientAuth: tls.RequireAndVerifyClientCert,
	}

	// Load certificates
	cert, err := sm.loadOrGenerateCertificate()
	if err != nil {
		return nil, fmt.Errorf("failed to load certificate: %w", err)
	}

	// Configure server TLS
	config.ServerConfig = &tls.Config{
		Certificates:     []tls.Certificate{*cert},
		MinVersion:       config.MinTLSVersion,
		CipherSuites:     config.CipherSuites,
		CurvePreferences: config.CurvePreferences,
		ClientAuth:       config.ClientAuth,
		ClientCAs:        sm.createClientCAPool(),
		VerifyConnection: sm.verifyTLSConnection,
	}

	// Configure client TLS
	config.ClientConfig = &tls.Config{
		Certificates:     []tls.Certificate{*cert},
		MinVersion:       config.MinTLSVersion,
		CipherSuites:     config.CipherSuites,
		CurvePreferences: config.CurvePreferences,
		RootCAs:          sm.createRootCAPool(),
		VerifyConnection: sm.verifyTLSConnection,
	}

	return config, nil
}

// Authenticate authenticates a request
func (sm *SecurityManager) Authenticate(ctx context.Context, credentials *Credentials) (*AuthResult, error) {
	// Log authentication attempt
	sm.logSecurityEvent(ctx, &SecurityEvent{
		EventType: EventTypeAuthentication,
		Severity:  SeverityInfo,
		Action:    "authenticate",
		Message:   "Authentication attempt",
		Details: map[string]interface{}{
			"credential_type": credentials.Type,
			"username":       credentials.Username,
		},
	})

	return sm.authManager.Authenticate(ctx, credentials)
}

// Authorize authorizes a request
func (sm *SecurityManager) Authorize(ctx context.Context, request *AuthorizationRequest) (*AuthorizationResult, error) {
	// Log authorization attempt
	sm.logSecurityEvent(ctx, &SecurityEvent{
		EventType: EventTypeAuthorization,
		Severity:  SeverityInfo,
		UserID:    request.UserID,
		Resource:  request.Resource,
		Action:    request.Action,
		Message:   "Authorization attempt",
	})

	return sm.authzManager.Authorize(ctx, request)
}

// ValidateNodeIdentity validates a node's identity
func (sm *SecurityManager) ValidateNodeIdentity(ctx context.Context, nodeID string, certificate *x509.Certificate) error {
	// Check if node is trusted
	sm.mu.RLock()
	trustedNode, exists := sm.trustedNodes[nodeID]
	sm.mu.RUnlock()

	if !exists {
		return fmt.Errorf("node %s is not trusted", nodeID)
	}

	// Validate certificate
	if err := sm.validateCertificate(certificate, trustedNode); err != nil {
		return fmt.Errorf("certificate validation failed: %w", err)
	}

	// Log successful validation
	sm.logSecurityEvent(ctx, &SecurityEvent{
		EventType: EventTypeAuthentication,
		Severity:  SeverityInfo,
		NodeID:    nodeID,
		Action:    "validate_node_identity",
		Result:    "success",
		Message:   "Node identity validated successfully",
	})

	return nil
}

// EncryptForDistribution encrypts data for distribution
func (sm *SecurityManager) EncryptForDistribution(ctx context.Context, data []byte, recipients []string) ([]byte, error) {
	if !sm.encryptionEnabled {
		return data, nil
	}

	return sm.encryption.Encrypt(ctx, data, recipients)
}

// DecryptFromDistribution decrypts data from distribution
func (sm *SecurityManager) DecryptFromDistribution(ctx context.Context, encryptedData []byte, nodeID string) ([]byte, error) {
	if !sm.encryptionEnabled {
		return encryptedData, nil
	}

	return sm.encryption.Decrypt(ctx, encryptedData, nodeID)
}

// GetTLSConfig returns TLS configuration for secure connections
func (sm *SecurityManager) GetTLSConfig(isServer bool) *tls.Config {
	if !sm.tlsEnabled {
		return nil
	}

	if isServer {
		return sm.tlsConfig.ServerConfig
	}
	return sm.tlsConfig.ClientConfig
}

// AddTrustedNode adds a node to the trusted nodes list
func (sm *SecurityManager) AddTrustedNode(ctx context.Context, node *TrustedNode) error {
	sm.mu.Lock()
	defer sm.mu.Unlock()

	// Validate node information
	if err := sm.validateTrustedNode(node); err != nil {
		return fmt.Errorf("node validation failed: %w", err)
	}

	sm.trustedNodes[node.NodeID] = node

	// Log node addition
	sm.logSecurityEvent(ctx, &SecurityEvent{
		EventType: EventTypeConfiguration,
		Severity:  SeverityInfo,
		NodeID:    node.NodeID,
		Action:    "add_trusted_node",
		Result:    "success",
		Message:   "Trusted node added",
		Details: map[string]interface{}{
			"trust_level": node.TrustLevel,
			"roles":       node.Roles,
		},
	})

	return nil
}

// DetectThreats analyzes events for potential security threats
func (sm *SecurityManager) DetectThreats(ctx context.Context, events []*SecurityEvent) ([]*ThreatEvent, error) {
	return sm.threatDetector.DetectThreats(ctx, events)
}

// Helper methods (placeholder implementations)

func (sm *SecurityManager) loadOrGenerateCertificate() (*tls.Certificate, error) {
	// Placeholder implementation
	// In production, this would load existing certificates or generate new ones
	cert, key, err := sm.generateSelfSignedCertificate()
	if err != nil {
		return nil, err
	}

	tlsCert, err := tls.X509KeyPair(cert, key)
	if err != nil {
		return nil, err
	}

	return &tlsCert, nil
}

func (sm *SecurityManager) generateSelfSignedCertificate() ([]byte, []byte, error) {
	// Generate a self-signed certificate for development/testing
	// In production, use proper CA-signed certificates
	
	template := x509.Certificate{
		SerialNumber: big.NewInt(1),
		Subject: pkix.Name{
			Organization:  []string{"BZZZ SLURP"},
			Country:       []string{"US"},
			Province:      []string{""},
			Locality:      []string{"San Francisco"},
			StreetAddress: []string{""},
			PostalCode:    []string{""},
		},
		NotBefore:    time.Now(),
		NotAfter:     time.Now().Add(365 * 24 * time.Hour),
		KeyUsage:     x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
		ExtKeyUsage:  []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
		IPAddresses:  []net.IP{net.IPv4(127, 0, 0, 1), net.IPv6loopback},
	}

	// This is a simplified implementation
	// In production, use proper key generation and certificate management
	return nil, nil, fmt.Errorf("certificate generation not implemented")
}

func (sm *SecurityManager) createClientCAPool() *x509.CertPool {
	// Create CA pool for client certificate validation
	return x509.NewCertPool()
}

func (sm *SecurityManager) createRootCAPool() *x509.CertPool {
	// Create root CA pool for server certificate validation
	return x509.NewCertPool()
}

func (sm *SecurityManager) verifyTLSConnection(cs tls.ConnectionState) error {
	// Custom TLS connection verification logic
	return nil
}

func (sm *SecurityManager) validateCertificate(cert *x509.Certificate, node *TrustedNode) error {
	// Validate certificate against trusted node information
	return nil
}

func (sm *SecurityManager) validateTrustedNode(node *TrustedNode) error {
	// Validate trusted node information
	if node.NodeID == "" {
		return fmt.Errorf("node ID is required")
	}
	if len(node.PublicKey) == 0 {
		return fmt.Errorf("public key is required")
	}
	return nil
}

func (sm *SecurityManager) logSecurityEvent(ctx context.Context, event *SecurityEvent) {
	if !sm.auditingEnabled || sm.auditLogger == nil {
		return
	}

	event.EventID = sm.generateEventID()
	event.Timestamp = time.Now()
	event.Fingerprint = sm.generateEventFingerprint(event)

	go func() {
		if err := sm.auditLogger.LogSecurityEvent(ctx, event); err != nil {
			// Log error but don't fail the operation
		}
	}()
}

func (sm *SecurityManager) generateEventID() string {
	return fmt.Sprintf("sec_%d", time.Now().UnixNano())
}

func (sm *SecurityManager) generateEventFingerprint(event *SecurityEvent) string {
	// Generate a fingerprint for event deduplication
	return fmt.Sprintf("%s_%s_%s", event.EventType, event.Action, event.UserID)
}

// Component constructor placeholders
func NewCertificateAuthority(config *config.Config) (*CertificateAuthority, error) {
	return &CertificateAuthority{}, nil
}

func NewAuthenticationManager(config *config.Config) (*AuthenticationManager, error) {
	return &AuthenticationManager{
		providers:     make(map[string]AuthProvider),
		loginAttempts: make(map[string]*LoginAttempts),
		authPolicies:  make(map[string]*AuthPolicy),
	}, nil
}

func NewAuthorizationManager(config *config.Config) (*AuthorizationManager, error) {
	return &AuthorizationManager{
		authzPolicies: make(map[string]*AuthorizationPolicy),
	}, nil
}

func NewSecurityAuditLogger(config *config.Config) (*SecurityAuditLogger, error) {
	return &SecurityAuditLogger{
		loggers:     []SecurityLogger{},
		eventBuffer: []*SecurityEvent{},
		enabled:     true,
	}, nil
}

func NewNodeAuthentication(config *config.Config, ca *CertificateAuthority) (*NodeAuthentication, error) {
	return &NodeAuthentication{}, nil
}

func NewDistributionEncryption(config *config.Config) (*DistributionEncryption, error) {
	return &DistributionEncryption{}, nil
}

func NewThreatDetector(config *config.Config) (*ThreatDetector, error) {
	return &ThreatDetector{
		detectionRules: []*ThreatDetectionRule{},
		activeThreats:  make(map[string]*ThreatEvent),
		mitigationStrategies: make(map[ThreatType]*MitigationStrategy),
	}, nil
}

// Method implementations for components (placeholders)
func (am *AuthenticationManager) Authenticate(ctx context.Context, credentials *Credentials) (*AuthResult, error) {
	return &AuthResult{Success: true}, nil
}

func (azm *AuthorizationManager) Authorize(ctx context.Context, request *AuthorizationRequest) (*AuthorizationResult, error) {
	return &AuthorizationResult{Decision: DecisionAllow}, nil
}

func (sal *SecurityAuditLogger) LogSecurityEvent(ctx context.Context, event *SecurityEvent) error {
	return nil
}

func (de *DistributionEncryption) Encrypt(ctx context.Context, data []byte, recipients []string) ([]byte, error) {
	return data, nil
}

func (de *DistributionEncryption) Decrypt(ctx context.Context, encryptedData []byte, nodeID string) ([]byte, error) {
	return encryptedData, nil
}

func (td *ThreatDetector) DetectThreats(ctx context.Context, events []*SecurityEvent) ([]*ThreatEvent, error) {
	return []*ThreatEvent{}, nil
}

// Supporting types (placeholders)
type TokenValidator interface{}
type SessionManager struct{}
type MultiFactorAuth struct{}
type CredentialStore struct{}
type LoginAttempts struct{}
type AuthPolicy struct{}
type RBACManager struct{}
type ACLManager struct{}
type ResourceManager struct{}
type PermissionCache struct{}
type AuthorizationPolicy struct{}
type SecurityPolicy struct{}
type SecurityAlertManager struct{}
type ComplianceManager struct{}
type AuditRetentionPolicy struct{}
type SecurityEventCriteria struct{}
type CertificateAuth struct{}
type KeyExchange struct{}
type TrustStore struct{}
type NodeRegistry struct{}
type ChallengeManager struct{}
type BehaviorAnalyzer struct{}
type AnomalyDetector struct{}
type ThreatIntelligence struct{}
type ThreatEvent struct{}
type MitigationStrategy struct{}
type ThreatCondition struct{}
type ThreatAction struct{}
type CertificateStore struct{}
type CRLManager struct{}
type OCSPResponder struct{}
type DistributionKeyManager struct{}
type EncryptionSuite struct{}
type KeyRotationPolicy struct{}
type EncryptionMetrics struct{}