"""
Penetration Tester Agent

Automated penetration testing to identify security weaknesses through
simulated attacks, exploitation attempts, and security testing.
"""

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


class PenetrationTesterAgent(BaseAgent):
    """
    Automated penetration testing agent.

    Performs:
    - Network penetration testing
    - Web application testing
    - API security testing
    - Wireless security testing
    - Social engineering simulation
    """

    def __init__(self):
        super().__init__(
            name='penetration-tester',
            description='Automated penetration testing',
            category='security',
            version='1.0.0',
            tags=['security', 'pentesting', 'exploitation', 'attack-simulation', 'red-team']
        )

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

        Args:
            params: {
                'target': str,
                'test_type': 'network|web|api|wireless|social|full',
                'scope': {
                    'ip_ranges': List[str],
                    'domains': List[str],
                    'excluded_targets': List[str]
                },
                'testing_level': 'passive|active|aggressive',
                'options': {
                    'test_authentication': bool,
                    'test_authorization': bool,
                    'attempt_exploitation': bool,
                    'test_injection': bool,
                    'test_xss': bool,
                    'test_csrf': bool,
                    'brute_force': bool,
                    'privilege_escalation': bool,
                    'lateral_movement': bool
                },
                'credentials': {
                    'valid_user': str,
                    'valid_password': str
                },
                'authorization': str,  # Written authorization required
                'time_window': {
                    'start': str,
                    'end': str
                }
            }

        Returns:
            {
                'status': 'success|failed',
                'test_id': str,
                'findings': List[Dict],
                'exploited_vulnerabilities': List[Dict],
                'compromised_systems': List[str],
                'severity_summary': Dict
            }
        """
        target = params.get('target')
        test_type = params.get('test_type', 'network')
        testing_level = params.get('testing_level', 'active')
        options = params.get('options', {})

        self.logger.info(
            f"Starting penetration test on {target} - {test_type} ({testing_level})"
        )

        # Mock penetration testing results
        findings = [
            {
                'id': 'PENTEST-001',
                'phase': 'reconnaissance',
                'severity': 'info',
                'title': 'Information Gathering Completed',
                'description': 'Collected system information and mapped attack surface',
                'discovered': {
                    'open_ports': [22, 80, 443, 3306, 8080],
                    'services': ['ssh', 'http', 'https', 'mysql', 'tomcat'],
                    'subdomains': ['api.example.com', 'admin.example.com', 'dev.example.com'],
                    'technologies': ['Apache 2.4', 'PHP 7.4', 'MySQL 8.0'],
                    'email_addresses': ['admin@example.com', 'support@example.com']
                }
            },
            {
                'id': 'PENTEST-002',
                'phase': 'scanning',
                'severity': 'high',
                'title': 'Default Credentials on Admin Panel',
                'description': 'Admin panel accessible with default credentials',
                'target': 'https://example.com/admin',
                'exploited': True,
                'credentials_found': {'username': 'admin', 'password': 'admin123'},
                'impact': 'Full administrative access to application',
                'remediation': 'Change default credentials immediately',
                'cvss_score': 8.8
            },
            {
                'id': 'PENTEST-003',
                'phase': 'exploitation',
                'severity': 'critical',
                'title': 'SQL Injection Leading to Database Compromise',
                'description': 'Successfully exploited SQL injection to extract database contents',
                'target': 'https://example.com/api/users',
                'exploited': True,
                'payload': "' OR '1'='1' --",
                'data_extracted': {
                    'tables': ['users', 'passwords', 'credit_cards'],
                    'records_accessed': 15234,
                    'sensitive_data': True
                },
                'impact': 'Complete database compromise, PII exposure',
                'remediation': 'Use parameterized queries, implement input validation',
                'cvss_score': 9.8
            },
            {
                'id': 'PENTEST-004',
                'phase': 'exploitation',
                'severity': 'critical',
                'title': 'Remote Code Execution via File Upload',
                'description': 'Uploaded malicious file and gained shell access',
                'target': 'https://example.com/upload',
                'exploited': True,
                'access_gained': 'reverse shell',
                'privileges': 'www-data',
                'impact': 'Remote code execution on web server',
                'remediation': 'Implement file type validation, restrict upload directory permissions',
                'cvss_score': 9.6
            },
            {
                'id': 'PENTEST-005',
                'phase': 'post-exploitation',
                'severity': 'critical',
                'title': 'Privilege Escalation to Root',
                'description': 'Escalated from www-data to root user',
                'method': 'Kernel exploit (CVE-2024-12345)',
                'exploited': True,
                'privileges_gained': 'root',
                'impact': 'Full system compromise',
                'remediation': 'Update kernel, apply security patches',
                'cvss_score': 10.0
            },
            {
                'id': 'PENTEST-006',
                'phase': 'post-exploitation',
                'severity': 'high',
                'title': 'Lateral Movement to Database Server',
                'description': 'Pivoted to internal database server',
                'exploited': True,
                'target': '10.0.1.50:3306',
                'credentials_reused': True,
                'impact': 'Access to production database',
                'remediation': 'Implement network segmentation, use unique credentials'
            }
        ]

        exploited_vulnerabilities = [f for f in findings if f.get('exploited')]

        compromised_systems = [
            'web-server-01 (10.0.1.10)',
            'database-server-01 (10.0.1.50)',
            'api-server-01 (10.0.1.25)'
        ]

        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'),
            'info': sum(1 for f in findings if f['severity'] == 'info')
        }

        attack_chain = [
            {
                'step': 1,
                'phase': 'Initial Access',
                'method': 'Default credentials on admin panel',
                'success': True
            },
            {
                'step': 2,
                'phase': 'Execution',
                'method': 'File upload to achieve RCE',
                'success': True
            },
            {
                'step': 3,
                'phase': 'Privilege Escalation',
                'method': 'Kernel exploit to gain root',
                'success': True
            },
            {
                'step': 4,
                'phase': 'Lateral Movement',
                'method': 'Credential reuse to access database',
                'success': True
            },
            {
                'step': 5,
                'phase': 'Data Exfiltration',
                'method': 'Extract sensitive database contents',
                'success': True
            }
        ]

        return {
            'status': 'success',
            'test_id': f'pentest-{test_type}-20251116-001',
            'target': target,
            'test_type': test_type,
            'testing_level': testing_level,
            'timestamp': '2025-11-16T00:00:00Z',
            'findings': findings,
            'total_findings': len(findings),
            'severity_counts': severity_counts,
            'exploited_vulnerabilities': exploited_vulnerabilities,
            'exploitation_success_rate': len(exploited_vulnerabilities) / len(findings) * 100,
            'compromised_systems': compromised_systems,
            'attack_chain': attack_chain,
            'attack_success': True,
            'time_to_compromise': '2.5 hours',
            'access_level_achieved': 'root/administrator',
            'data_accessed': {
                'databases': ['production_db', 'user_db'],
                'files': ['/etc/passwd', '/etc/shadow', '/var/www/config.php'],
                'credentials_harvested': 47,
                'pii_records': 15234
            },
            'test_duration_hours': 8.5,
            'recommendations': [
                'Immediately change all default credentials',
                'Patch SQL injection vulnerabilities',
                'Implement file upload restrictions',
                'Update kernel and apply security patches',
                'Implement network segmentation',
                'Enable MFA for all administrative access',
                'Implement intrusion detection system',
                'Conduct security awareness training'
            ],
            'compliance_impact': {
                'pci-dss': 'Critical violations - failed',
                'hipaa': 'Critical violations - failed',
                'gdpr': 'Data breach risk - failed',
                'soc2': 'Control failures - failed'
            },
            'reports_generated': [
                f'pentest_report_{test_type}_20251116.pdf',
                f'pentest_report_{test_type}_20251116.json',
                f'pentest_executive_summary_20251116.pdf'
            ],
            'next_steps': [
                'Present findings to security team',
                'Prioritize critical vulnerability remediation',
                'Implement recommended security controls',
                'Schedule retest after remediation',
                'Update incident response plan'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate penetration testing parameters."""
        if 'target' not in params:
            self.logger.error("Missing required field: target")
            return False

        if 'authorization' not in params:
            self.logger.error("Written authorization required for penetration testing")
            return False

        valid_test_types = ['network', 'web', 'api', 'wireless', 'social', 'full']
        test_type = params.get('test_type', 'network')
        if test_type not in valid_test_types:
            self.logger.error(f"Invalid test_type: {test_type}")
            return False

        valid_testing_levels = ['passive', 'active', 'aggressive']
        testing_level = params.get('testing_level', 'active')
        if testing_level not in valid_testing_levels:
            self.logger.error(f"Invalid testing_level: {testing_level}")
            return False

        return True
