/**
 * @fileoverview Tests for HIPAA compliance and healthcare-specific security requirements
 * Tests PHI handling, audit trails, access controls, and healthcare data protection
 */

import { describe, test, expect, beforeEach, afterEach } from '@jest/globals';
import { mockFactory } from '../mocks/mockFactory.js';

describe('HIPAA Compliance and Healthcare Security Tests', () => {
  let mockEnv;
  let toolGenerator;

  beforeEach(() => {
    mockEnv = mockFactory.createMockEnvironment({
      authTypes: ['provider', 'patient'],
      enableHttpMocks: true,
      enableAuthMocks: true,
      enableHealthcareMocks: true
    });

    toolGenerator = mockEnv.toolGenerator;
    
    // Setup healthcare authentication
    mockFactory.authMocks.setMockCredentials('provider', {
      username: 'test_provider',
      password: 'test_password'
    });
    mockFactory.authMocks.setMockCredentials('patient', {
      username: 'test_patient',
      password: 'test_password'
    });
  });

  afterEach(() => {
    mockFactory.resetAllMocks();
  });

  describe('PHI (Protected Health Information) Handling', () => {
    test('should properly encrypt PHI data in transit and at rest', async () => {
      // Setup
      const toolName = 'provider_create_emrregisterPatient';
      const parameters = {
        firstName: 'John',
        lastName: 'Doe',
        email: 'john.doe@test.com',
        dateOfBirth: '1990-01-01',
        personalID: 'SSN123456789', // Sensitive PHI
        medicalHistory: 'Diabetes, Hypertension' // Sensitive medical data
      };

      // Mock HIPAA-compliant response
      const mockPatient = mockFactory.healthcareMocks.createHIPAACompliantData('patient', 'provider', {
        firstName: 'John',
        lastName: 'Doe',
        email: 'john.doe@test.com'
      });

      mockFactory.httpMocks.mockRequest('POST', '/api/emr/register-patients', {
        status: 201,
        data: {
          success: true,
          patient: mockPatient,
          encryption: {
            algorithm: 'AES-256-GCM',
            keyRotation: 'enabled',
            transitEncryption: 'TLS 1.3'
          },
          hipaaCompliant: true
        }
      });

      // Execute
      const result = await toolGenerator.executeTool(toolName, parameters);

      // Assert HIPAA compliance
      expect(result.data.hipaaCompliant).toBe(true);
      expect(result.data.patient.hipaaMetadata).toBeDefined();
      expect(result.data.patient.hipaaMetadata.dataClassification).toBe('PHI');
      expect(result.data.patient.hipaaMetadata.encryptionStatus).toBe('encrypted');
      expect(result.data.encryption.algorithm).toBe('AES-256-GCM');
    });

    test('should implement minimum necessary standard for PHI access', async () => {
      const toolName = 'provider_create_getPatientInfo';
      const parameters = {
        patientId: 123,
        requestedFields: ['firstName', 'lastName', 'dateOfBirth'], // Limited fields
        accessPurpose: 'treatment'
      };

      // Mock minimum necessary response
      mockFactory.httpMocks.mockRequest('POST', '/api/get-patient-info/123', {
        status: 200,
        data: {
          success: true,
          patient: {
            firstName: 'John',
            lastName: 'Doe',
            dateOfBirth: '1990-01-01'
            // Other sensitive fields excluded based on minimum necessary
          },
          accessControl: {
            minimumNecessary: true,
            fieldsProvided: ['firstName', 'lastName', 'dateOfBirth'],
            fieldsExcluded: ['personalID', 'medicalHistory'],
            accessPurpose: 'treatment'
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.accessControl.minimumNecessary).toBe(true);
      expect(result.data.accessControl.fieldsExcluded).toContain('personalID');
    });

    test('should handle PHI de-identification for research purposes', async () => {
      const toolName = 'provider_get_researchData';
      const parameters = {
        dataset: 'diabetes_study',
        deidentification_level: 'safe_harbor'
      };

      // Mock de-identified data response
      mockFactory.httpMocks.mockRequest('GET', '/api/research-data/diabetes_study', {
        status: 200,
        data: {
          success: true,
          research_data: [
            {
              patient_id: 'DEIDENT_001', // De-identified ID
              age_range: '30-35',
              gender: 'M',
              diagnosis: 'Type 2 Diabetes',
              treatment_response: 'Positive'
              // No direct identifiers
            }
          ],
          deidentification: {
            method: 'safe_harbor',
            identifiers_removed: [
              'names', 'addresses', 'dates', 'phone_numbers', 
              'email_addresses', 'ssn', 'medical_record_numbers'
            ],
            certification: 'HIPAA_compliant',
            expert_determination: false
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.deidentification.method).toBe('safe_harbor');
      expect(result.data.deidentification.identifiers_removed).toContain('ssn');
      expect(result.data.research_data[0].patient_id).toMatch(/^DEIDENT_/);
    });
  });

  describe('Access Controls and Authorization', () => {
    test('should implement role-based access control (RBAC)', async () => {
      const toolName = 'provider_create_getPatientInfo';
      const parameters = {
        patientId: 123
      };

      // Mock RBAC response
      mockFactory.httpMocks.mockRequest('POST', '/api/get-patient-info/123', {
        status: 200,
        data: {
          success: true,
          patient: mockFactory.healthcareMocks.createHIPAACompliantData('patient', 'provider'),
          accessControl: {
            userRole: 'provider',
            permissions: ['read:patient_data', 'write:patient_data', 'read:medical_records'],
            restrictions: ['no_billing_access'],
            accessLevel: 'full_clinical_access'
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.accessControl.userRole).toBe('provider');
      expect(result.data.accessControl.permissions).toContain('read:patient_data');
      expect(result.data.accessControl.restrictions).toContain('no_billing_access');
    });

    test('should enforce break-glass emergency access procedures', async () => {
      const toolName = 'provider_emergency_patientAccess';
      const parameters = {
        patientId: 123,
        emergencyCode: 'EMERGENCY_001',
        justification: 'Patient in critical condition, immediate access required',
        emergencyType: 'life_threatening'
      };

      // Mock emergency access response
      mockFactory.httpMocks.mockRequest('POST', '/api/emergency-access/patient/123', {
        status: 200,
        data: {
          success: true,
          patient: mockFactory.healthcareMocks.createHIPAACompliantData('patient', 'provider'),
          emergencyAccess: {
            granted: true,
            emergencyCode: 'EMERGENCY_001',
            accessLevel: 'full_emergency_access',
            timeLimit: '4 hours',
            requiresReview: true,
            auditFlag: 'emergency_access'
          },
          complianceNote: 'Emergency access granted under HIPAA emergency provisions'
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.emergencyAccess.granted).toBe(true);
      expect(result.data.emergencyAccess.requiresReview).toBe(true);
      expect(result.data.emergencyAccess.auditFlag).toBe('emergency_access');
    });

    test('should implement patient consent verification', async () => {
      const toolName = 'provider_create_sharePatientData';
      const parameters = {
        patientId: 123,
        recipientProvider: 'specialist_456',
        dataTypes: ['medical_records', 'lab_results'],
        purpose: 'specialist_consultation'
      };

      // Mock consent verification
      mockFactory.httpMocks.mockRequest('POST', '/api/share-patient-data', {
        status: 200,
        data: {
          success: true,
          sharing_authorized: true,
          consent_verification: {
            consent_obtained: true,
            consent_date: '2025-01-15',
            consent_type: 'written_authorization',
            expiration_date: '2026-01-15',
            scope: ['medical_records', 'lab_results'],
            purpose: 'specialist_consultation'
          },
          sharing_details: {
            recipient: 'specialist_456',
            shared_at: new Date().toISOString(),
            tracking_id: 'SHARE_789'
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.consent_verification.consent_obtained).toBe(true);
      expect(result.data.consent_verification.scope).toContain('medical_records');
      expect(result.data.sharing_details.tracking_id).toBe('SHARE_789');
    });
  });

  describe('Audit Trails and Logging', () => {
    test('should maintain comprehensive audit trails for all PHI access', async () => {
      const toolName = 'provider_create_getPatientInfo';
      const parameters = {
        patientId: 123
      };

      // Mock comprehensive audit trail
      mockFactory.httpMocks.mockRequest('POST', '/api/get-patient-info/123', {
        status: 200,
        data: {
          success: true,
          patient: mockFactory.healthcareMocks.createHIPAACompliantData('patient', 'provider'),
          auditTrail: {
            accessId: 'AUDIT_12345',
            userId: 'provider_456',
            userRole: 'provider',
            patientId: 123,
            action: 'patient_data_access',
            timestamp: new Date().toISOString(),
            ipAddress: '192.168.1.100',
            userAgent: 'Healthcare Portal v2.1',
            sessionId: 'SESSION_789',
            accessPurpose: 'patient_care',
            dataAccessed: ['demographics', 'medical_history'],
            accessMethod: 'direct_lookup',
            workstation: 'WS_001',
            location: 'Main Clinic - Room 101'
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      const audit = result.data.auditTrail;
      expect(audit.accessId).toBeDefined();
      expect(audit.userId).toBe('provider_456');
      expect(audit.action).toBe('patient_data_access');
      expect(audit.dataAccessed).toContain('demographics');
      expect(audit.workstation).toBe('WS_001');
    });

    test('should log failed access attempts for security monitoring', async () => {
      const toolName = 'provider_create_getPatientInfo';
      const parameters = {
        patientId: 999 // Non-existent patient
      };

      // Mock failed access with audit
      mockFactory.httpMocks.mockRequest('POST', '/api/get-patient-info/999', null, true, {
        response: {
          status: 404,
          data: { 
            error: 'Patient not found',
            auditTrail: {
              accessId: 'AUDIT_FAIL_001',
              userId: 'provider_456',
              action: 'failed_patient_access',
              timestamp: new Date().toISOString(),
              failureReason: 'patient_not_found',
              attemptedPatientId: 999,
              securityFlag: 'potential_unauthorized_access'
            }
          }
        }
      });

      try {
        await toolGenerator.executeTool(toolName, parameters);
      } catch (error) {
        // Verify audit trail exists even for failed attempts
        expect(error.response?.data?.auditTrail).toBeDefined();
        expect(error.response.data.auditTrail.action).toBe('failed_patient_access');
        expect(error.response.data.auditTrail.securityFlag).toBe('potential_unauthorized_access');
      }
    });

    test('should implement audit log integrity protection', async () => {
      const toolName = 'admin_get_auditLogs';
      const parameters = {
        date_range: {
          start: '2025-07-01',
          end: '2025-07-09'
        }
      };

      // Mock audit log response with integrity protection
      mockFactory.httpMocks.mockRequest('GET', '/api/admin/audit-logs', {
        status: 200,
        data: {
          success: true,
          audit_logs: [
            {
              id: 'AUDIT_001',
              timestamp: '2025-07-09T10:00:00Z',
              action: 'patient_data_access',
              userId: 'provider_456',
              checksum: 'SHA256:abc123def456',
              signature: 'RSA_SIGNATURE_HERE'
            }
          ],
          integrity: {
            total_logs: 1,
            verified_checksums: 1,
            tamper_detected: false,
            last_integrity_check: new Date().toISOString(),
            protection_method: 'cryptographic_hash_chain'
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.integrity.tamper_detected).toBe(false);
      expect(result.data.integrity.verified_checksums).toBe(1);
      expect(result.data.audit_logs[0].checksum).toMatch(/^SHA256:/);
    });
  });

  describe('Data Breach Prevention and Response', () => {
    test('should detect and prevent potential data breaches', async () => {
      const toolName = 'provider_bulk_patientExport';
      const parameters = {
        patient_ids: Array.from({length: 1000}, (_, i) => i + 1), // Large bulk export
        export_format: 'csv'
      };

      // Mock breach prevention response
      mockFactory.httpMocks.mockRequest('POST', '/api/bulk-export-patients', null, true, {
        response: {
          status: 403,
          data: {
            error: 'Potential data breach detected',
            breach_prevention: {
              trigger: 'bulk_export_threshold_exceeded',
              threshold: 100,
              requested_count: 1000,
              risk_level: 'high',
              action_taken: 'request_blocked',
              incident_id: 'INCIDENT_001'
            },
            required_approvals: ['security_officer', 'privacy_officer'],
            compliance_note: 'Large data exports require additional authorization'
          }
        }
      });

      try {
        await toolGenerator.executeTool(toolName, parameters);
      } catch (error) {
        expect(error.response.data.breach_prevention.trigger).toBe('bulk_export_threshold_exceeded');
        expect(error.response.data.breach_prevention.risk_level).toBe('high');
        expect(error.response.data.required_approvals).toContain('security_officer');
      }
    });

    test('should implement automatic breach notification procedures', async () => {
      const toolName = 'system_security_incident';
      const parameters = {
        incident_type: 'unauthorized_access_detected',
        affected_records: 50,
        incident_details: 'Suspicious login patterns detected'
      };

      // Mock breach notification response
      mockFactory.httpMocks.mockRequest('POST', '/api/security-incident', {
        status: 200,
        data: {
          success: true,
          incident: {
            id: 'BREACH_001',
            type: 'unauthorized_access_detected',
            severity: 'medium',
            affected_records: 50,
            notification_required: true
          },
          breach_response: {
            immediate_actions: [
              'affected_accounts_locked',
              'security_team_notified',
              'audit_log_preserved'
            ],
            notification_timeline: {
              internal_notification: 'immediate',
              patient_notification: 'within_60_days',
              regulatory_notification: 'within_60_days'
            },
            compliance_requirements: [
              'HIPAA_breach_notification_rule',
              'state_breach_notification_laws'
            ]
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.incident.notification_required).toBe(true);
      expect(result.data.breach_response.immediate_actions).toContain('security_team_notified');
      expect(result.data.breach_response.compliance_requirements).toContain('HIPAA_breach_notification_rule');
    });
  });

  describe('Business Associate Agreements (BAA)', () => {
    test('should verify BAA compliance for third-party integrations', async () => {
      const toolName = 'provider_integrate_thirdPartyService';
      const parameters = {
        service_name: 'Lab Results API',
        service_provider: 'LabCorp',
        integration_type: 'api_connection'
      };

      // Mock BAA verification
      mockFactory.httpMocks.mockRequest('POST', '/api/integrate-third-party', {
        status: 200,
        data: {
          success: true,
          integration_approved: true,
          baa_compliance: {
            baa_signed: true,
            baa_date: '2025-01-01',
            baa_expiration: '2026-01-01',
            service_provider: 'LabCorp',
            compliance_verified: true,
            permitted_uses: ['lab_result_transmission', 'patient_data_processing'],
            safeguards_required: ['encryption', 'access_controls', 'audit_logging']
          }
        }
      });

      const result = await toolGenerator.executeTool(toolName, parameters);
      
      expect(result.data.baa_compliance.baa_signed).toBe(true);
      expect(result.data.baa_compliance.compliance_verified).toBe(true);
      expect(result.data.baa_compliance.safeguards_required).toContain('encryption');
    });
  });
});