#!/usr/bin/env node
/**
 * FBS-BookWriter 智能记忆安全机制增强版
 * 
 * 针对审计中发现的问题进行全面优化：
 * 1. 实施更严格的数据访问控制
 * 2. 加强审计日志
 * 3. 细化权限颗粒度
 * 4. 增强审计追踪
 */

import fs from 'fs';
import path from 'path';
import { createHash } from 'crypto';
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

export const SMART_MEMORY_SECURITY_ENHANCED = {
  version: '2.0.2-enhanced',

  lastUpdated: '2026-04-08',
  
  // 安全目标
  securityTargets: {
    dataIsolation: 1.0,           // 100%数据隔离
    accessControlGranularity: 0.95, // 95%权限颗粒度
    auditLoggingCoverage: 1.0,     // 100%审计日志覆盖
    encryptionStrength: 'AES-256',
    complianceLevel: 'high'
  },
  
  // ========================================
  // 增强的数据访问控制
  // ========================================
  enhancedAccessControl: {
    // 细粒度权限系统
    fineGrainedPermissions: {
      enabled: true,
      
      // 权限模型
      permissionModel: {
        // 资源类型
        resourceTypes: [
          'user_profile',
          'learned_features',
          'application_config',
          'memory_data',
          'audit_logs'
        ],
        
        // 操作类型
        operationTypes: [
          'read',
          'write',
          'delete',
          'export',
          'import',
          'admin'
        ],
        
        // 权限级别
        permissionLevels: [
          { level: 'none', operations: [] },
          { level: 'read_only', operations: ['read'] },
          { level: 'read_write', operations: ['read', 'write'] },
          { level: 'full', operations: ['read', 'write', 'delete', 'export', 'import'] },
          { level: 'admin', operations: ['read', 'write', 'delete', 'export', 'import', 'admin'] }
        ]
      },
      
      // 基于角色的访问控制（RBAC）
      rbac: {
        enabled: true,
        
        // 角色定义
        roles: {
          'user': {
            description: '普通用户',
            permissions: {
              'user_profile': ['read'],
              'learned_features': ['read'],
              'application_config': ['read', 'write'],
              'memory_data': ['read'],
              'audit_logs': ['read']
            }
          },
          'power_user': {
            description: '高级用户',
            permissions: {
              'user_profile': ['read', 'write'],
              'learned_features': ['read', 'write'],
              'application_config': ['read', 'write'],
              'memory_data': ['read', 'export'],
              'audit_logs': ['read']
            }
          },
          'admin': {
            description: '管理员',
            permissions: {
              'user_profile': ['read', 'write', 'delete'],
              'learned_features': ['read', 'write', 'delete'],
              'application_config': ['read', 'write', 'delete'],
              'memory_data': ['read', 'write', 'delete', 'export', 'import'],
              'audit_logs': ['read', 'write', 'delete']
            }
          }
        },
        
        // 角色继承
        roleInheritance: {
          'admin': ['power_user', 'user'],
          'power_user': ['user']
        }
      },
      
      // 基于属性的访问控制（ABAC）
      abac: {
        enabled: true,
        
        // 属性定义
        attributes: {
          user: ['id', 'role', 'department', 'clearance_level'],
          resource: ['type', 'sensitivity_level', 'owner'],
          environment: ['time', 'location', 'device'],
          action: ['type', 'complexity']
        },
        
        // 策略规则
        policies: [
          {
            id: 'high_sensitivity_read',
            description: '高敏感度数据读取需要高级权限',
            condition: 'resource.sensitivity_level == "high"',
            effect: 'deny',
            exception: 'user.clearance_level >= 3'
          },
          {
            id: 'admin_only_delete',
            description: '删除操作仅限管理员',
            condition: 'action.type == "delete"',
            effect: 'deny',
            exception: 'user.role == "admin"'
          },
          {
            id: 'business_hours_access',
            description: '工作时间内访问限制',
            condition: 'environment.time < "09:00" || environment.time > "18:00"',
            effect: 'deny',
            exception: 'user.role == "admin" || action.type == "read"'
          }
        ]
      }
    },
    
    // 数据隔离机制
    dataIsolation: {
      // 完全隔离
      completeIsolation: {
        enabled: true,
        
        // 用户数据隔离
        userDataIsolation: {
          storage: 'separate_directories',
          encryption: 'per_user',
          accessControl: 'user_only'
        },
        
        // 功能数据隔离
        featureDataIsolation: {
          learnedFeatures: {
            storage: 'separate_database',
            encryption: 'feature_level',
            accessControl: 'role_based'
          },
          applicationConfig: {
            storage: 'shared_database',
            encryption: 'config_level',
            accessControl: 'role_based'
          }
        }
      },
      
      // 多租户支持
      multiTenancy: {
        enabled: true,
        
        // 租户隔离
        tenantIsolation: {
          strategy: 'database_per_tenant',
          crossTenantAccess: 'forbidden',
          dataSharing: 'explicit_only'
        },
        
        // 资源配额
        resourceQuota: {
          enabled: true,
          quotas: {
            'user': { storage: '100MB', requests: '1000/hour' },
            'power_user': { storage: '500MB', requests: '5000/hour' },
            'admin': { storage: 'unlimited', requests: 'unlimited' }
          }
        }
      }
    },
    
    // 会话管理
    sessionManagement: {
      // 会话安全
      sessionSecurity: {
        // 会话超时
        sessionTimeout: {
          absolute: 3600000,      // 1小时
          idle: 1800000,          // 30分钟
          sliding: true
        },
        
        // 会话加密
        sessionEncryption: {
          algorithm: 'AES-256-GCM',
          keyRotation: true,
          rotationInterval: 86400000  // 24小时
        },
        
        // 会话绑定
        sessionBinding: {
          ipAddress: true,
          userAgent: true,
          deviceFingerprint: true
        }
      },
      
      // 会话监控
      sessionMonitoring: {
        enabled: true,
        
        // 异常检测
        anomalyDetection: {
          enabled: true,
          detectionRules: [
            {
              type: 'concurrent_sessions',
              threshold: 3,
              action: 'block_new'
            },
            {
              type: 'suspicious_location',
              action: 'require_reauth'
            },
            {
              type: 'abnormal_activity',
              threshold: 10,  // 操作次数/分钟
              action: 'monitor'
            }
          ]
        }
      }
    }
  },
  
  // ========================================
  // 增强的审计日志
  // ========================================
  enhancedAuditLogging: {
    // 全面的审计日志
    comprehensiveLogging: {
      enabled: true,
      
      // 日志级别
      logLevels: {
        INFO: 'info',
        WARNING: 'warning',
        ERROR: 'error',
        CRITICAL: 'critical',
        SECURITY: 'security'
      },
      
      // 日志分类
      logCategories: {
        ACCESS: 'access',
        DATA: 'data',
        SYSTEM: 'system',
        SECURITY: 'security',
        PERFORMANCE: 'performance'
      },
      
      // 日志内容
      logContent: {
        // 访问日志
        accessLogs: [
          'timestamp',
          'user_id',
          'resource',
          'action',
          'result',
          'ip_address',
          'user_agent',
          'session_id'
        ],
        
        // 数据日志
        dataLogs: [
          'timestamp',
          'operation',
          'data_type',
          'data_size',
          'affected_records',
          'change_description'
        ],
        
        // 安全日志
        securityLogs: [
          'timestamp',
          'event_type',
          'severity',
          'description',
          'source',
          'affected_resources',
          'remediation_actions'
        ]
      }
    },
    
    // 实时审计
    realtimeAudit: {
      enabled: true,
      
      // 实时监控
      monitoring: {
        // 实时事件
        eventMonitoring: {
          enabled: true,
          eventTypes: [
            'access_attempt',
            'access_granted',
            'access_denied',
            'data_modification',
            'data_export',
            'data_deletion',
            'privilege_escalation',
            'configuration_change'
          ]
        },
        
        // 告警规则
        alertRules: [
          {
            id: 'brute_force_attempt',
            condition: 'failed_access_attempts > 5 in 5 minutes',
            severity: 'high',
            action: 'block_ip',
            notify: true
          },
          {
            id: 'unusual_data_export',
            condition: 'data_export_size > 10MB in 1 hour',
            severity: 'medium',
            action: 'require_approval',
            notify: true
          },
          {
            id: 'privilege_escalation',
            condition: 'role_change to higher privilege',
            severity: 'critical',
            action: 'require_mfa',
            notify: true
          }
        ]
      },
      
      // 实时分析
      analysis: {
        // 模式检测
        patternDetection: {
          enabled: true,
          patterns: [
            'access_pattern_anomaly',
            'data_access_anomaly',
            'time_based_anomaly',
            'volume_based_anomaly'
          ]
        },
        
        // 行为分析
        behaviorAnalysis: {
          enabled: true,
          baselineWindow: 86400000,  // 24小时
          updateInterval: 3600000,    // 1小时
          anomalyThreshold: 3.0        // 3个标准差
        }
      }
    },
    
    // 日志保留策略
    logRetention: {
      // 保留期限
      retentionPolicies: {
        'access_logs': {
          duration: '90_days',
          compression: true,
          archiving: true
        },
        'data_logs': {
          duration: '180_days',
          compression: true,
          archiving: true
        },
        'security_logs': {
          duration: '365_days',
          compression: true,
          archiving: true
        }
      },
      
      // 日志归档
      archiving: {
        enabled: true,
        
        // 归档策略
        archiveStrategy: {
          trigger: 'size_based',
          triggerValue: '100MB',
          archiveLocation: 'secure_storage',
          encryption: true
        },
        
        // 归档格式
        archiveFormat: {
          format: 'jsonl.gz',
          compression: 'gzip',
          encryption: 'AES-256'
        }
      }
    }
  },
  
  // ========================================
  // 增强的加密机制
  // ========================================
  enhancedEncryption: {
    // 数据加密
    dataEncryption: {
      // 静态数据加密
      encryptionAtRest: {
        algorithm: 'AES-256-GCM',
        keyManagement: 'hardware_security_module',
        keyRotation: {
          enabled: true,
          interval: 90,  // 天
          autoRotation: true
        }
      },
      
      // 传输数据加密
      encryptionInTransit: {
        protocol: 'TLS 1.3',
        cipherSuites: ['TLS_AES_256_GCM_SHA384'],
        certificateValidation: 'strict'
      }
    },
    
    // 密钥管理
    keyManagement: {
      // 密钥生成
      keyGeneration: {
        algorithm: 'RSA-4096',
        randomSource: 'cryptographically_secure'
      },
      
      // 密钥存储
      keyStorage: {
        location: 'hardware_security_module',
        backup: {
          enabled: true,
          location: 'offline_storage',
          encryption: true
        }
      },
      
      // 密钥访问控制
      keyAccessControl: {
        authentication: 'multi_factor',
        authorization: 'role_based',
        auditLogging: true,
        accessLogging: true
      }
    }
  }
};

/**
 * 增强的安全控制器
 */
export class EnhancedSecurityController {
  constructor(config = SMART_MEMORY_SECURITY_ENHANCED) {
    this.config = config;
    this.auditLogger = new EnhancedAuditLogger(config);
    this.accessController = new EnhancedAccessController(config);
    this.encryptionManager = new EnhancedEncryptionManager(config);
  }
  
  /**
   * 检查访问权限
   */
  async checkAccess(userId, resource, action, context = {}) {
    const result = await this.accessController.checkAccess(userId, resource, action, context);
    
    // 记录访问日志
    await this.auditLogger.logAccess({
      userId,
      resource,
      action,
      granted: result.granted,
      reason: result.reason,
      context
    });
    
    return result;
  }
  
  /**
   * 记录数据操作
   */
  async logDataOperation(operation, data) {
    await this.auditLogger.logDataOperation(operation, data);
  }
  
  /**
   * 加密数据
   */
  async encryptData(data, options = {}) {
    return this.encryptionManager.encrypt(data, options);
  }
  
  /**
   * 解密数据
   */
  async decryptData(encryptedData, options = {}) {
    return this.encryptionManager.decrypt(encryptedData, options);
  }
  
  /**
   * 获取安全报告
   */
  async getSecurityReport(options = {}) {
    return this.auditLogger.generateSecurityReport(options);
  }
}

/**
 * 增强的审计日志器
 */
class EnhancedAuditLogger {
  constructor(config) {
    this.config = config;
    this.logBuffer = [];
    this.logFile = path.join(__dirname, '.fbs', 'audit.log');
  }
  
  async logAccess(data) {
    const logEntry = {
      timestamp: new Date().toISOString(),
      type: 'ACCESS',
      category: this.config.enhancedAuditLogging.comprehensiveLogging.logCategories.ACCESS,
      ...data
    };
    
    await this.writeLog(logEntry);
  }
  
  async logDataOperation(operation, data) {
    const logEntry = {
      timestamp: new Date().toISOString(),
      type: 'DATA',
      category: this.config.enhancedAuditLogging.comprehensiveLogging.logCategories.DATA,
      operation,
      ...data
    };
    
    await this.writeLog(logEntry);
  }
  
  async logSecurityEvent(data) {
    const logEntry = {
      timestamp: new Date().toISOString(),
      type: 'SECURITY',
      category: this.config.enhancedAuditLogging.comprehensiveLogging.logCategories.SECURITY,
      ...data
    };
    
    await this.writeLog(logEntry);
    
    // 检查是否需要告警
    await this.checkAlertRules(logEntry);
  }
  
  async writeLog(logEntry) {
    this.logBuffer.push(logEntry);
    
    // 缓冲区满了就写入文件
    if (this.logBuffer.length >= 100) {
      await this.flushLogBuffer();
    }
  }
  
  async flushLogBuffer() {
    if (this.logBuffer.length === 0) return;
    
    const logDirectory = path.dirname(this.logFile);
    if (!fs.existsSync(logDirectory)) {
      fs.mkdirSync(logDirectory, { recursive: true });
    }
    
    const logContent = this.logBuffer.map(entry => JSON.stringify(entry)).join('\n') + '\n';
    fs.appendFileSync(this.logFile, logContent);
    
    this.logBuffer = [];
  }
  
  async checkAlertRules(logEntry) {
    // 检查告警规则
    const alertRules = this.config.enhancedAuditLogging.realtimeAudit.monitoring.alertRules;
    
    for (const rule of alertRules) {
      // 简化实现，实际需要更复杂的条件检查
      if (logEntry.type === 'SECURITY' && logEntry.severity === 'critical') {
        await this.triggerAlert(rule, logEntry);
      }
    }
  }
  
  async triggerAlert(rule, logEntry) {
    console.log(`[SECURITY ALERT] ${rule.id}: ${rule.condition}`);
    // 实际应该发送通知、触发应急响应等
  }
  
  async generateSecurityReport(options = {}) {
    // 生成安全报告
    return {
      summary: {
        totalLogs: 0,
        accessAttempts: 0,
        deniedAccesses: 0,
        securityEvents: 0
      },
      details: {}
    };
  }
}

/**
 * 增强的访问控制器
 */
class EnhancedAccessController {
  constructor(config) {
    this.config = config;
    this.userRoles = new Map();
    this.resourcePermissions = new Map();
  }
  
  async checkAccess(userId, resource, action, context) {
    // 获取用户角色
    const role = this.userRoles.get(userId) || 'user';
    
    // 获取角色权限
    const rolePermissions = this.config.enhancedAccessControl.fineGrainedPermissions.rbac.roles[role];
    
    if (!rolePermissions) {
      return { granted: false, reason: 'Unknown role' };
    }
    
    // 检查资源权限
    const resourcePermissions = rolePermissions.permissions[resource];
    
    if (!resourcePermissions) {
      return { granted: false, reason: 'No permissions for resource' };
    }
    
    // 检查操作权限
    if (!resourcePermissions.includes(action)) {
      return { granted: false, reason: 'Insufficient permissions' };
    }
    
    // 检查ABAC策略
    const abacResult = this.checkABAC(role, resource, action, context);
    
    return abacResult;
  }
  
  checkABAC(role, resource, action, context) {
    const policies = this.config.enhancedAccessControl.fineGrainedPermissions.abac.policies;
    
    for (const policy of policies) {
      // 简化实现，实际需要复杂的条件评估
      if (policy.condition.includes('admin') && role !== 'admin') {
        if (policy.exception && context.clearanceLevel >= 3) {
          continue;
        }
        return { granted: false, reason: policy.description };
      }
    }
    
    return { granted: true };
  }
}

/**
 * 增强的加密管理器
 */
class EnhancedEncryptionManager {
  constructor(config) {
    this.config = config;
  }
  
  async encrypt(data, options = {}) {
    const algorithm = options.algorithm || 
      this.config.enhancedEncryption.dataEncryption.encryptionAtRest.algorithm;
    
    const iv = crypto.randomBytes(16);
    const key = this.getKey(options.keyId);
    const cipher = crypto.createCipheriv(algorithm, key, iv);
    
    let encrypted = cipher.update(data, 'utf8', 'hex');
    encrypted += cipher.final('hex');
    
    return {
      encrypted,
      iv: iv.toString('hex'),
      algorithm
    };
  }
  
  async decrypt(encryptedData, options = {}) {
    const { encrypted, iv, algorithm } = encryptedData;
    const key = this.getKey(options.keyId);
    const decipher = crypto.createDecipheriv(algorithm, key, Buffer.from(iv, 'hex'));
    
    let decrypted = decipher.update(encrypted, 'hex', 'utf8');
    decrypted += decipher.final('utf8');
    
    return decrypted;
  }
  
  getKey(keyId) {
    // 简化实现，实际应该从HSM或安全存储获取
    return crypto.randomBytes(32);
  }
}

export default SMART_MEMORY_SECURITY_ENHANCED;
