"""
Security Scanner Agent

Scans code for security vulnerabilities, including OWASP Top 10,
dependency vulnerabilities, and security best practices.
"""

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


class SecurityScannerAgent(BaseAgent):
    """
    Scans code for security vulnerabilities.

    Detects:
    - SQL Injection
    - XSS vulnerabilities
    - CSRF issues
    - Authentication flaws
    - Hardcoded secrets
    - Dependency vulnerabilities
    """

    def __init__(self):
        super().__init__(
            name='security-scanner',
            description='Scan code for security vulnerabilities',
            category='engineering',
            version='1.0.0',
            tags=['security', 'vulnerabilities', 'owasp', 'scanning']
        )

    async def execute(self, params: Dict[str, Any]) -> Dict[str, Any]:
        """
        Scan for security vulnerabilities.

        Args:
            params: {
                'target_path': str,
                'language': 'python|javascript|typescript|go|rust',
                'scan_type': 'sast|dast|dependency|all',
                'options': {
                    'check_owasp_top10': bool,
                    'check_dependencies': bool,
                    'check_secrets': bool,
                    'check_configurations': bool,
                    'severity_threshold': 'low|medium|high|critical'
                }
            }

        Returns:
            {
                'status': 'success|failed',
                'vulnerabilities': List[Dict],
                'security_score': float,
                'owasp_categories': Dict,
                'remediation_steps': List[str]
            }
        """
        target_path = params.get('target_path')
        language = params.get('language', 'python')
        scan_type = params.get('scan_type', 'all')
        options = params.get('options', {})

        self.logger.info(
            f"Scanning {target_path} for security vulnerabilities ({scan_type})"
        )

        # Mock security scan results
        vulnerabilities = [
            {
                'id': 'VULN-001',
                'severity': 'critical',
                'category': 'SQL Injection',
                'owasp': 'A03:2021 – Injection',
                'file': 'src/api/routes.py',
                'line': 45,
                'code': 'query = f"SELECT * FROM users WHERE id = {user_id}"',
                'description': 'SQL injection vulnerability via string concatenation',
                'cwe': 'CWE-89',
                'remediation': 'Use parameterized queries or ORM methods',
                'confidence': 0.95
            },
            {
                'id': 'VULN-002',
                'severity': 'high',
                'category': 'XSS',
                'owasp': 'A03:2021 – Injection',
                'file': 'src/templates/user_profile.html',
                'line': 23,
                'code': '<div>{{ user_input }}</div>',
                'description': 'Unescaped user input in template',
                'cwe': 'CWE-79',
                'remediation': 'Enable auto-escaping or use safe filters',
                'confidence': 0.88
            },
            {
                'id': 'VULN-003',
                'severity': 'critical',
                'category': 'Hardcoded Secret',
                'owasp': 'A07:2021 – Identification and Authentication Failures',
                'file': 'src/config.py',
                'line': 12,
                'code': 'API_KEY = "sk_live_abc123xyz"',
                'description': 'Hardcoded API key in source code',
                'cwe': 'CWE-798',
                'remediation': 'Move secrets to environment variables or secret manager',
                'confidence': 0.99
            },
            {
                'id': 'VULN-004',
                'severity': 'high',
                'category': 'Insecure Deserialization',
                'owasp': 'A08:2021 – Software and Data Integrity Failures',
                'file': 'src/utils/serializer.py',
                'line': 67,
                'code': 'data = pickle.loads(user_data)',
                'description': 'Unsafe deserialization of untrusted data',
                'cwe': 'CWE-502',
                'remediation': 'Use safe serialization formats like JSON',
                'confidence': 0.92
            },
            {
                'id': 'VULN-005',
                'severity': 'medium',
                'category': 'Weak Cryptography',
                'owasp': 'A02:2021 – Cryptographic Failures',
                'file': 'src/auth/password.py',
                'line': 34,
                'code': 'hash = md5(password).hexdigest()',
                'description': 'Using weak hashing algorithm (MD5)',
                'cwe': 'CWE-327',
                'remediation': 'Use bcrypt, argon2, or scrypt for password hashing',
                'confidence': 0.99
            },
            {
                'id': 'VULN-006',
                'severity': 'high',
                'category': 'Dependency Vulnerability',
                'owasp': 'A06:2021 – Vulnerable and Outdated Components',
                'package': 'django',
                'version': '3.1.0',
                'cve': 'CVE-2021-35042',
                'description': 'SQL injection in Django QuerySet',
                'remediation': 'Update to Django 3.2.4 or later',
                'confidence': 1.0
            }
        ]

        owasp_categories = {
            'A01:2021 – Broken Access Control': 0,
            'A02:2021 – Cryptographic Failures': 1,
            'A03:2021 – Injection': 2,
            'A04:2021 – Insecure Design': 0,
            'A05:2021 – Security Misconfiguration': 0,
            'A06:2021 – Vulnerable and Outdated Components': 1,
            'A07:2021 – Identification and Authentication Failures': 1,
            'A08:2021 – Software and Data Integrity Failures': 1,
            'A09:2021 – Security Logging and Monitoring Failures': 0,
            'A10:2021 – Server-Side Request Forgery': 0
        }

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

        remediation_steps = [
            'Fix critical SQL injection vulnerability immediately',
            'Remove hardcoded secrets and use environment variables',
            'Update Django to latest secure version',
            'Replace MD5 with bcrypt for password hashing',
            'Enable auto-escaping in templates',
            'Replace pickle with JSON for serialization',
            'Add input validation and sanitization',
            'Implement CSRF protection',
            'Add security headers (CSP, HSTS, etc.)',
            'Enable security logging and monitoring'
        ]

        return {
            'status': 'success',
            'target_path': target_path,
            'language': language,
            'scan_type': scan_type,
            'vulnerabilities': vulnerabilities,
            'total_vulnerabilities': len(vulnerabilities),
            'severity_counts': severity_counts,
            'security_score': 3.2,  # Out of 10
            'risk_level': 'high',
            'owasp_categories': owasp_categories,
            'owasp_violations': sum(1 for v in owasp_categories.values() if v > 0),
            'remediation_steps': remediation_steps,
            'files_scanned': 47,
            'lines_scanned': 12456,
            'scan_duration': 8.3,
            'reports_generated': [
                'security_report.html',
                'security_report.json',
                'security_report.pdf'
            ],
            'compliance': {
                'owasp_top_10': False,
                'pci_dss': False,
                'gdpr': 'partial',
                'hipaa': False
            },
            'recommendations': [
                'Implement security training for developers',
                'Add security scanning to CI/CD pipeline',
                'Conduct regular security audits',
                'Implement WAF (Web Application Firewall)',
                'Enable security monitoring and alerting',
                'Perform penetration testing',
                'Implement security incident response plan'
            ],
            'next_steps': [
                'Review and prioritize vulnerabilities',
                'Fix critical and high severity issues',
                'Update vulnerable dependencies',
                'Add security tests',
                'Re-scan after fixes',
                'Set up continuous security scanning'
            ]
        }

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

        valid_scan_types = ['sast', 'dast', 'dependency', 'all']
        scan_type = params.get('scan_type', 'all')

        if scan_type not in valid_scan_types:
            self.logger.error(f"Invalid scan type: {scan_type}")
            return False

        return True
