"""
Security Audit Agent

Performs comprehensive security audits of systems, applications, and
infrastructure to identify security gaps, policy violations, and risks.
"""

from typing import Any, Dict, List
from agents.base import BaseAgent


class SecurityAuditAgent(BaseAgent):
    """
    Comprehensive security audit agent.

    Audits:
    - Security configurations
    - Access controls
    - Security policies
    - Compliance requirements
    - Security best practices
    """

    def __init__(self):
        super().__init__(
            name='security-audit',
            description='Perform security audits',
            category='security',
            version='1.0.0',
            tags=['security', 'audit', 'compliance', 'assessment', 'risk']
        )

    async def execute(self, params: Dict[str, Any]) -> Dict[str, Any]:
        """
        Perform security audit.

        Args:
            params: {
                'audit_type': 'comprehensive|targeted|compliance|risk',
                'scope': {
                    'systems': List[str],
                    'applications': List[str],
                    'networks': List[str],
                    'cloud_accounts': List[str]
                },
                'audit_standards': ['cis', 'nist', 'iso27001', 'pci-dss'],
                'options': {
                    'check_configurations': bool,
                    'check_access_controls': bool,
                    'check_policies': bool,
                    'check_logs': bool,
                    'check_encryption': bool,
                    'check_backups': bool,
                    'check_incident_response': bool,
                    'interview_staff': bool
                },
                'depth': 'basic|standard|thorough',
                'output_format': 'pdf|json|html|csv'
            }

        Returns:
            {
                'status': 'success|failed',
                'audit_id': str,
                'findings': List[Dict],
                'risk_assessment': Dict,
                'recommendations': List[str],
                'compliance_status': Dict
            }
        """
        audit_type = params.get('audit_type', 'comprehensive')
        scope = params.get('scope', {})
        audit_standards = params.get('audit_standards', ['cis'])
        options = params.get('options', {})
        depth = params.get('depth', 'standard')

        self.logger.info(
            f"Performing {audit_type} security audit - {depth} depth"
        )

        # Mock security audit findings
        findings = [
            {
                'id': 'AUDIT-001',
                'category': 'Access Control',
                'severity': 'high',
                'title': 'Excessive Privileged Access',
                'description': '15 users have unnecessary administrative privileges',
                'impact': 'Increased risk of unauthorized access and privilege abuse',
                'affected_systems': ['Active Directory', 'AWS IAM', 'Database'],
                'users_affected': 15,
                'recommendation': 'Apply principle of least privilege, review and revoke unnecessary permissions',
                'remediation_effort': 'medium',
                'compliance_violations': ['CIS 5.1', 'NIST AC-6', 'ISO27001 A.9.2'],
                'risk_score': 7.5
            },
            {
                'id': 'AUDIT-002',
                'category': 'Password Policy',
                'severity': 'medium',
                'title': 'Weak Password Requirements',
                'description': 'Current password policy does not meet security standards',
                'impact': 'Increased risk of password compromise',
                'current_policy': {
                    'min_length': 8,
                    'complexity': 'basic',
                    'expiration_days': 180,
                    'history': 3
                },
                'recommended_policy': {
                    'min_length': 12,
                    'complexity': 'strong',
                    'expiration_days': 90,
                    'history': 10,
                    'mfa_required': True
                },
                'recommendation': 'Implement stronger password policy and enforce MFA',
                'compliance_violations': ['CIS 1.1', 'PCI-DSS 8.2'],
                'risk_score': 6.0
            },
            {
                'id': 'AUDIT-003',
                'category': 'Encryption',
                'severity': 'critical',
                'title': 'Unencrypted Sensitive Data',
                'description': 'Sensitive data stored without encryption',
                'impact': 'Data breach risk, compliance violations',
                'unencrypted_data': {
                    'databases': ['customer_db', 'payment_db'],
                    'file_shares': ['//fileserver/hr', '//fileserver/finance'],
                    'backups': ['s3://backup-bucket/prod']
                },
                'data_types': ['PII', 'PHI', 'PCI', 'financial'],
                'records_at_risk': 250000,
                'recommendation': 'Implement encryption at rest and in transit for all sensitive data',
                'compliance_violations': ['GDPR Art. 32', 'HIPAA 164.312', 'PCI-DSS 3.4'],
                'risk_score': 9.0
            },
            {
                'id': 'AUDIT-004',
                'category': 'Logging and Monitoring',
                'severity': 'high',
                'title': 'Insufficient Security Logging',
                'description': 'Security events not adequately logged or monitored',
                'impact': 'Inability to detect and respond to security incidents',
                'gaps_identified': [
                    'Authentication failures not logged',
                    'Privilege escalations not monitored',
                    'Data access not audited',
                    'Log retention period too short (7 days)'
                ],
                'recommendation': 'Implement comprehensive logging and SIEM solution',
                'compliance_violations': ['CIS 4.1', 'NIST AU-2', 'SOC2 CC7.2'],
                'risk_score': 7.8
            },
            {
                'id': 'AUDIT-005',
                'category': 'Patch Management',
                'severity': 'critical',
                'title': 'Missing Critical Security Patches',
                'description': '47 systems with critical patches missing',
                'impact': 'Vulnerability to known exploits',
                'systems_affected': 47,
                'critical_patches_missing': 15,
                'high_patches_missing': 32,
                'oldest_missing_patch': '245 days',
                'recommendation': 'Implement automated patch management and emergency patching process',
                'compliance_violations': ['CIS 3.5', 'PCI-DSS 6.2'],
                'risk_score': 9.5
            },
            {
                'id': 'AUDIT-006',
                'category': 'Network Security',
                'severity': 'high',
                'title': 'Overly Permissive Firewall Rules',
                'description': 'Firewall rules allow unnecessary network access',
                'impact': 'Increased attack surface',
                'issues_found': [
                    '23 rules allow ANY source',
                    '15 rules allow ANY destination',
                    '8 legacy rules no longer needed',
                    'Production network not segmented from development'
                ],
                'recommendation': 'Implement network segmentation and review firewall rules',
                'compliance_violations': ['CIS 2.1', 'NIST SC-7'],
                'risk_score': 7.2
            },
            {
                'id': 'AUDIT-007',
                'category': 'Incident Response',
                'severity': 'medium',
                'title': 'Incident Response Plan Outdated',
                'description': 'Incident response plan not updated in 2 years',
                'impact': 'Ineffective incident response',
                'issues': [
                    'Contact information outdated',
                    'Procedures not tested',
                    'No tabletop exercises conducted',
                    'Team members not trained'
                ],
                'recommendation': 'Update IR plan and conduct regular testing',
                'risk_score': 5.5
            },
            {
                'id': 'AUDIT-008',
                'category': 'Backup and Recovery',
                'severity': 'high',
                'title': 'Backup Testing Not Performed',
                'description': 'No evidence of backup restoration testing',
                'impact': 'Unknown backup viability, potential data loss',
                'last_backup_test': 'Never',
                'backups_untested': 'All production backups',
                'recommendation': 'Implement regular backup testing schedule',
                'compliance_violations': ['CIS 10.1'],
                'risk_score': 8.0
            }
        ]

        severity_counts = {
            'critical': sum(1 for f in findings if f['severity'] == 'critical'),
            'high': sum(1 for f in findings if f['severity'] == 'high'),
            'medium': sum(1 for f in findings if f['severity'] == 'medium'),
            'low': sum(1 for f in findings if f['severity'] == 'low')
        }

        risk_assessment = {
            'overall_risk_score': 7.6,
            'risk_level': 'high',
            'critical_risks': severity_counts['critical'],
            'high_risks': severity_counts['high'],
            'risk_categories': {
                'Access Control': 'high',
                'Data Protection': 'critical',
                'Network Security': 'high',
                'Patch Management': 'critical',
                'Logging and Monitoring': 'high',
                'Incident Response': 'medium',
                'Physical Security': 'low'
            },
            'risk_trend': 'increasing',
            'previous_audit_score': 6.8
        }

        compliance_status = {
            'cis': {
                'score': 65.5,
                'status': 'partial',
                'controls_passed': 89,
                'controls_failed': 47,
                'controls_total': 136
            },
            'nist': {
                'score': 68.2,
                'status': 'partial',
                'controls_passed': 156,
                'controls_failed': 73,
                'controls_total': 229
            },
            'iso27001': {
                'score': 62.1,
                'status': 'partial',
                'controls_passed': 71,
                'controls_failed': 43,
                'controls_total': 114
            },
            'pci-dss': {
                'score': 58.3,
                'status': 'non-compliant',
                'requirements_passed': 7,
                'requirements_failed': 5,
                'requirements_total': 12
            }
        }

        recommendations = [
            'IMMEDIATE: Encrypt all sensitive data (customer, payment, health)',
            'IMMEDIATE: Patch all critical vulnerabilities within 48 hours',
            'HIGH: Implement principle of least privilege across all systems',
            'HIGH: Enable comprehensive security logging and monitoring',
            'HIGH: Test backup restoration procedures',
            'MEDIUM: Strengthen password policies and enforce MFA',
            'MEDIUM: Review and optimize firewall rules',
            'MEDIUM: Update and test incident response plan',
            'ONGOING: Implement automated patch management',
            'ONGOING: Conduct quarterly security audits',
            'ONGOING: Provide security awareness training'
        ]

        return {
            'status': 'success',
            'audit_id': f'audit-{audit_type}-20251116-001',
            'audit_type': audit_type,
            'audit_standards': audit_standards,
            'depth': depth,
            'timestamp': '2025-11-16T00:00:00Z',
            'findings': findings,
            'total_findings': len(findings),
            'severity_counts': severity_counts,
            'risk_assessment': risk_assessment,
            'compliance_status': compliance_status,
            'recommendations': recommendations,
            'systems_audited': scope.get('systems', []) or 47,
            'applications_audited': scope.get('applications', []) or 23,
            'interviews_conducted': 12 if options.get('interview_staff') else 0,
            'documents_reviewed': 156,
            'audit_duration_days': 5,
            'auditors': ['Senior Security Auditor', 'Compliance Specialist', 'Network Security Expert'],
            'reports_generated': [
                f'security_audit_{audit_type}_20251116.pdf',
                f'security_audit_{audit_type}_20251116_executive_summary.pdf',
                f'security_audit_{audit_type}_20251116_detailed.json',
                f'security_audit_{audit_type}_20251116_compliance_report.pdf'
            ],
            'next_steps': [
                'Present findings to executive leadership',
                'Prioritize critical and high-severity findings',
                'Develop remediation plan with timelines',
                'Assign owners for each finding',
                'Schedule follow-up audit in 90 days',
                'Track remediation progress monthly'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate security audit parameters."""
        valid_audit_types = ['comprehensive', 'targeted', 'compliance', 'risk']
        audit_type = params.get('audit_type', 'comprehensive')
        if audit_type not in valid_audit_types:
            self.logger.error(f"Invalid audit_type: {audit_type}")
            return False

        valid_depths = ['basic', 'standard', 'thorough']
        depth = params.get('depth', 'standard')
        if depth not in valid_depths:
            self.logger.error(f"Invalid depth: {depth}")
            return False

        return True
