"""
Security Patch Manager Agent

Manages security patches, updates, and vulnerability remediation across
systems, applications, and infrastructure.
"""

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


class SecurityPatchManagerAgent(BaseAgent):
    """
    Security patch management agent.

    Manages:
    - Patch identification and assessment
    - Patch testing and deployment
    - Emergency security updates
    - Patch compliance tracking
    - Vulnerability remediation
    """

    def __init__(self):
        super().__init__(
            name='security-patch-manager',
            description='Manage security patches',
            category='security',
            version='1.0.0',
            tags=['patches', 'updates', 'vulnerability', 'remediation', 'security']
        )

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

        Args:
            params: {
                'action': 'scan|assess|deploy|rollback|report',
                'scope': {
                    'systems': List[str],
                    'os_types': List[str],
                    'applications': List[str]
                },
                'patch_criteria': {
                    'severity': 'critical|high|medium|low|all',
                    'age_days': int,
                    'cve_ids': List[str],
                    'patch_categories': List[str]
                },
                'deployment_options': {
                    'schedule': str,
                    'maintenance_window': Dict,
                    'phased_rollout': bool,
                    'test_first': bool,
                    'auto_rollback': bool,
                    'max_concurrent_systems': int
                },
                'compliance_requirements': List[str]
            }

        Returns:
            {
                'status': 'success|failed',
                'patch_id': str,
                'patches_available': List[Dict],
                'deployment_results': Dict,
                'compliance_status': Dict
            }
        """
        action = params.get('action', 'scan')
        scope = params.get('scope', {})
        patch_criteria = params.get('patch_criteria', {})
        deployment_options = params.get('deployment_options', {})

        self.logger.info(
            f"Security patch management - action: {action}"
        )

        patches_available = [
            {
                'patch_id': 'MS25-NOV-001',
                'title': 'Windows Security Update - Critical RCE',
                'severity': 'critical',
                'cve_ids': ['CVE-2025-12345', 'CVE-2025-12346'],
                'affected_systems': 156,
                'kb_number': 'KB5025001',
                'release_date': '2025-11-08',
                'age_days': 8,
                'description': 'Remote code execution vulnerability in Windows',
                'cvss_score': 9.8,
                'exploit_available': True,
                'in_the_wild': True,
                'vendor': 'Microsoft',
                'category': 'Security Update',
                'requires_reboot': True,
                'deployment_status': 'pending',
                'priority': 1
            },
            {
                'patch_id': 'RHEL-2025-7890',
                'title': 'Red Hat Security Advisory - Kernel Update',
                'severity': 'high',
                'cve_ids': ['CVE-2025-23456'],
                'affected_systems': 89,
                'release_date': '2025-11-10',
                'age_days': 6,
                'description': 'Privilege escalation in Linux kernel',
                'cvss_score': 7.8,
                'vendor': 'Red Hat',
                'category': 'Kernel',
                'requires_reboot': True,
                'deployment_status': 'testing',
                'priority': 2
            },
            {
                'patch_id': 'JAVA-SEC-2025-11',
                'title': 'Oracle Java Critical Patch Update',
                'severity': 'critical',
                'cve_ids': ['CVE-2025-34567', 'CVE-2025-34568', 'CVE-2025-34569'],
                'affected_systems': 234,
                'release_date': '2025-11-15',
                'age_days': 1,
                'description': 'Multiple vulnerabilities in Java SE',
                'cvss_score': 9.0,
                'vendor': 'Oracle',
                'category': 'Application',
                'requires_reboot': False,
                'deployment_status': 'pending',
                'priority': 1
            }
        ]

        deployment_results = {
            'patches_deployed': 45,
            'systems_patched': 387,
            'successful_deployments': 372,
            'failed_deployments': 15,
            'pending_deployments': 89,
            'success_rate': 96.1,
            'deployment_timeline': {
                'started': '2025-11-15T02:00:00Z',
                'completed': '2025-11-15T06:30:00Z',
                'duration_hours': 4.5
            },
            'by_severity': {
                'critical_patches_deployed': 12,
                'high_patches_deployed': 23,
                'medium_patches_deployed': 10
            },
            'systems_requiring_reboot': 156,
            'systems_rebooted': 134,
            'systems_pending_reboot': 22
        }

        compliance_status = {
            'patch_compliance_rate': 83.5,
            'critical_patch_compliance': 76.2,
            'high_patch_compliance': 85.3,
            'systems_compliant': 758,
            'systems_non_compliant': 150,
            'overdue_patches': {
                'critical': 23,
                'high': 45,
                'medium': 67,
                'total': 135
            },
            'compliance_targets': {
                'critical_patches': '24 hours',
                'high_patches': '7 days',
                'medium_patches': '30 days'
            },
            'sla_violations': {
                'critical_sla_breached': 5,
                'high_sla_breached': 12,
                'total_breaches': 17
            }
        }

        patch_statistics = {
            'total_patches_available': len(patches_available),
            'critical_patches': sum(1 for p in patches_available if p['severity'] == 'critical'),
            'patches_with_exploits': sum(1 for p in patches_available if p.get('exploit_available')),
            'patches_exploited_in_wild': sum(1 for p in patches_available if p.get('in_the_wild')),
            'average_patch_age_days': 5.0,
            'oldest_unpatched_days': 45
        }

        return {
            'status': 'success',
            'patch_id': f'patch-mgmt-{action}-20251116-001',
            'action': action,
            'timestamp': '2025-11-16T00:00:00Z',
            'patches_available': patches_available,
            'total_patches_available': len(patches_available),
            'patch_statistics': patch_statistics,
            'deployment_results': deployment_results,
            'compliance_status': compliance_status,
            'systems_scanned': len(scope.get('systems', [])) or 908,
            'vulnerability_coverage': {
                'total_cves_addressed': 89,
                'critical_cves_addressed': 23,
                'high_cves_addressed': 45,
                'remaining_vulnerabilities': 67
            },
            'recommendations': [
                'IMMEDIATE: Deploy critical Windows RCE patch (CVE-2025-12345)',
                'IMMEDIATE: Deploy critical Java patches',
                'HIGH: Deploy RHEL kernel update during next maintenance window',
                'Address 17 SLA violations for patch deployment',
                'Implement automated patch testing',
                'Enable automatic patching for critical security updates',
                'Improve patch compliance from 83.5% to 95%',
                'Reduce critical patch deployment time to under 24 hours',
                'Schedule regular maintenance windows',
                'Implement pre-production patch testing environment'
            ],
            'patch_schedule': {
                'next_patch_tuesday': '2025-12-08',
                'next_maintenance_window': '2025-11-23 02:00-06:00 UTC',
                'emergency_patches_pending': 2,
                'scheduled_patches': 45
            },
            'risk_assessment': {
                'unpatched_critical_risk_score': 9.2,
                'unpatched_high_risk_score': 7.5,
                'overall_risk_level': 'high',
                'risk_reduction_after_patching': '65%',
                'estimated_risk_after_patching': 'medium'
            },
            'reports_generated': [
                f'patch_management_{action}_20251116.pdf',
                f'patch_compliance_report_20251116.json',
                f'patch_deployment_log_20251116.csv',
                f'vulnerability_remediation_status_20251116.html'
            ],
            'next_steps': [
                'Deploy critical patches immediately',
                'Test high-priority patches in staging',
                'Schedule maintenance window for kernel updates',
                'Follow up on failed deployments',
                'Reboot systems pending restart',
                'Monitor for new security advisories'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate patch management parameters."""
        valid_actions = ['scan', 'assess', 'deploy', 'rollback', 'report']
        action = params.get('action', 'scan')
        if action not in valid_actions:
            self.logger.error(f"Invalid action: {action}")
            return False

        valid_severities = ['critical', 'high', 'medium', 'low', 'all']
        severity = params.get('patch_criteria', {}).get('severity', 'all')
        if severity not in valid_severities:
            self.logger.error(f"Invalid severity: {severity}")
            return False

        return True
