Healthcare SSO: HIPAA-Compliant EMR & EHR Authentication

const healthcareIdPConfig = {
  tenantId: process.env.AZURE_TENANT_ID,
  clientId: process.env.HEALTHCARE_CLIENT_ID,
  clientSecret: process.env.HEALTHCARE_CLIENT_SECRET,
  authority: `https://login.microsoftonline.com/${tenantId}`,
  redirectUri: 'https://emr-portal.healthnet.com/auth/callback',
  scopes: ['User.Read', 'Group.Read.All', 'Directory.Read.All'],
  conditionalAccess: {
    requireMFA: true,
    allowedLocations: ['hospital_network', 'clinic_branches'],
    deviceCompliance: 'required',
    sessionTimeout: 480
  },
  auditSettings: {
    logAllAccess: true,
    retentionPeriod: '7_years',
    hipaaCompliant: true
  }
};

const healthcareRoles = {
  'attending_physician': {
    permissions: ['full_patient_access', 'prescribe_medication', 'discharge_patients'],
    systemAccess: ['epic', 'cerner', 'lab_systems', 'radiology'],
    emergencyAccess: true
  },
  'resident_physician': {
    permissions: ['supervised_patient_access', 'order_labs', 'document_care'],
    systemAccess: ['epic', 'cerner', 'lab_systems'],
    supervisorRequired: true
  },
  'registered_nurse': {
    permissions: ['assigned_patient_access', 'medication_admin', 'vital_signs'],
    systemAccess: ['epic', 'medication_system', 'monitoring'],
    shiftBased: true
  },
  'specialist_consultant': {
    permissions: ['consultation_access', 'specialty_orders', 'referral_management'],
    systemAccess: ['epic', 'specialty_systems'],
    temporaryAccess: true
  }
};

const samlaConfig = {
  issuer: 'https://sso.healthnet.com',
  entryPoint: 'https://sso.healthnet.com/auth/saml/login',
  cert: process.env.SAML_CERT,
  privateCert: process.env.SAML_PRIVATE_KEY,
  
  serviceProviders: {
    epic: {
      entityId: 'https://epic.healthnet.com',
      assertionConsumerServiceURL: 'https://epic.healthnet.com/saml/acs',
      nameIdFormat: 'urn:oasis:names:tc:SAML:2.0:nameid-format:persistent',
      encryptAssertions: true,
      signRequests: true
    },
    cerner: {
      entityId: 'https://cerner.healthnet.com',
      assertionConsumerServiceURL: 'https://cerner.healthnet.com/auth/saml',
      nameIdFormat: 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
      smartOnFhir: true,
      contextPassing: 'patient_id'
    }
  },
  
  attributeMapping: {
    'employee_id': 'urn:oid:2.5.4.3',
    'medical_license': 'urn:oid:1.3.6.1.4.1.5923.1.1.1.6',
    'department': 'urn:oid:2.5.4.11',
    'role': 'urn:oid:1.3.6.1.4.1.5923.1.1.1.1',
    'npi_number': 'urn:oid:1.3.6.1.4.1.5923.1.1.1.13'
  }
};

const emergencyAccess = {
  triggerConditions: [
    'patient_code_blue',
    'system_unavailable',
    'disaster_mode',
    'supervisor_override'
  ],
  
  authentication: {
    method: 'break_glass',
    requiresJustification: true,
    minimumApprovers: 1,
    maxDuration: '4_hours',
    autoExpiry: true
  },
  
  auditRequirements: {
    logLevel: 'emergency',
    immediateNotification: ['security_team', 'compliance_officer'],
    requiresReview: true,
    reviewDeadline: '24_hours',
    documentationRequired: true
  },
  
  permissions: {
    scope: 'limited_patient_access',
    excludeSystems: ['billing', 'administrative'],
    includesSystems: ['epic_emergency', 'lab_critical', 'pharmacy_emergency'],
    dataAccess: 'read_only_except_critical'
  }
};

function initiateEmergencyAccess(providerId, reason, patientId) {
  const session = {
    sessionId: generateEmergencySessionId(),
    providerId: providerId,
    reason: reason,
    patientId: patientId,
    timestamp: new Date(),
    approver: getCurrentSupervisor(),
    duration: '4_hours',
    restrictions: ['audit_enhanced', 'limited_scope']
  };
  
  auditLogger.logEmergencyAccess(session);
  notifySecurityTeam(session);
  
  return generateEmergencyToken(session);
}

const hipaaAuditLogger = {
  logUserAccess: (userId, patientId, action, systemId) => {
    const auditEntry = {
      timestamp: new Date().toISOString(),
      userId: userId,
      patientId: patientId,
      action: action,
      systemId: systemId,
      ipAddress: getClientIP(),
      userAgent: getUserAgent(),
      sessionId: getCurrentSessionId(),
      accessGranted: verifyAccess(userId, patientId),
      minimumNecessary: checkMinimumNecessary(userId, patientId, action)
    };
    
    encryptAndStore(auditEntry);
    
    if (isSensitiveAccess(action)) {
      alertSecurityTeam(auditEntry);
    }
  },
  
  generateComplianceReport: (startDate, endDate) => {
    const metrics = {
      totalAccess: getTotalAccessCount(startDate, endDate),
      uniqueUsers: getUniqueUserCount(startDate, endDate),
      emergencyAccess: getEmergencyAccessCount(startDate, endDate),
      failedLogins: getFailedLoginCount(startDate, endDate),
      suspiciousActivity: getSuspiciousActivityCount(startDate, endDate)
    };
    
    return generateHIPAAReport(metrics);
  }
};