"""
MFA Manager Agent

Manages multi-factor authentication (MFA) enrollment, configuration,
and enforcement across systems and applications.
"""

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


class MFAManagerAgent(BaseAgent):
    """
    Multi-factor authentication management agent.

    Manages:
    - MFA enrollment and provisioning
    - TOTP (Time-based One-Time Password)
    - SMS and email verification
    - Hardware tokens (YubiKey, etc.)
    - Biometric authentication
    - Backup codes
    """

    def __init__(self):
        super().__init__(
            name='mfa-manager',
            description='Manage multi-factor authentication',
            category='security',
            version='1.0.0',
            tags=['mfa', '2fa', 'authentication', 'totp', 'security', 'yubikey']
        )

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

        Args:
            params: {
                'action': 'enroll|enforce|audit|report|reset',
                'scope': {
                    'users': List[str],
                    'user_groups': List[str],
                    'applications': List[str],
                    'systems': List[str]
                },
                'mfa_methods': ['totp', 'sms', 'email', 'push', 'hardware-token', 'biometric'],
                'policy': {
                    'require_mfa_for_admins': bool,
                    'require_mfa_for_all': bool,
                    'allow_trusted_devices': bool,
                    'trusted_device_duration_days': int,
                    'backup_codes_required': bool,
                    'min_mfa_methods': int
                },
                'enforcement_mode': 'optional|recommended|required',
                'grace_period_days': int
            }

        Returns:
            {
                'status': 'success|failed',
                'mfa_id': str,
                'enrollment_status': Dict,
                'enforcement_results': Dict,
                'compliance_rate': float
            }
        """
        action = params.get('action', 'audit')
        scope = params.get('scope', {})
        mfa_methods = params.get('mfa_methods', ['totp'])
        policy = params.get('policy', {})
        enforcement_mode = params.get('enforcement_mode', 'required')

        self.logger.info(
            f"MFA management - action: {action}, enforcement: {enforcement_mode}"
        )

        enrollment_status = {
            'total_users': 1234,
            'enrolled_users': 987,
            'not_enrolled_users': 247,
            'enrollment_rate': 80.0,
            'by_method': {
                'totp': 756,
                'sms': 234,
                'email': 189,
                'push_notification': 567,
                'hardware_token': 89,
                'biometric': 123
            },
            'admin_users': {
                'total': 89,
                'enrolled': 78,
                'not_enrolled': 11,
                'enrollment_rate': 87.6
            },
            'privileged_users': {
                'total': 234,
                'enrolled': 198,
                'not_enrolled': 36,
                'enrollment_rate': 84.6
            }
        }

        enforcement_results = {
            'users_notified': 247,
            'enrollment_invitations_sent': 247,
            'grace_period_active': params.get('grace_period_days', 0) > 0,
            'grace_period_ends': '2025-12-16T00:00:00Z',
            'accounts_restricted': 0 if enforcement_mode != 'required' else 36,
            'backup_codes_generated': 987
        }

        non_compliant_users = [
            {
                'user': 'admin.user',
                'role': 'Administrator',
                'mfa_status': 'not_enrolled',
                'risk_level': 'critical',
                'last_login': '2025-11-15T14:30:00Z',
                'action_required': 'immediate_enrollment'
            },
            {
                'user': 'finance.manager',
                'role': 'Finance Manager',
                'mfa_status': 'not_enrolled',
                'risk_level': 'high',
                'last_login': '2025-11-16T08:15:00Z',
                'action_required': 'enrollment_within_7_days'
            }
        ]

        mfa_usage_statistics = {
            'total_mfa_verifications_today': 4567,
            'successful_verifications': 4523,
            'failed_verifications': 44,
            'success_rate': 99.0,
            'by_method': {
                'totp': 2834,
                'push': 1234,
                'sms': 345,
                'hardware_token': 110,
                'biometric': 44
            },
            'trusted_devices': {
                'total_trusted_devices': 2345,
                'active_trusted_devices': 1987,
                'expired_trusted_devices': 358
            }
        }

        security_incidents = [
            {
                'incident_type': 'MFA Bypass Attempt',
                'user': 'compromised.user',
                'timestamp': '2025-11-16T03:15:00Z',
                'details': 'Multiple failed MFA attempts',
                'action_taken': 'Account locked, user notified'
            },
            {
                'incident_type': 'Device Registration from New Location',
                'user': 'traveling.user',
                'timestamp': '2025-11-16T10:30:00Z',
                'location': 'Singapore',
                'usual_location': 'New York',
                'action_taken': 'Additional verification required'
            }
        ]

        return {
            'status': 'success',
            'mfa_id': f'mfa-{action}-20251116-001',
            'action': action,
            'enforcement_mode': enforcement_mode,
            'timestamp': '2025-11-16T00:00:00Z',
            'enrollment_status': enrollment_status,
            'enforcement_results': enforcement_results,
            'compliance_rate': enrollment_status['enrollment_rate'],
            'non_compliant_users': non_compliant_users,
            'mfa_usage_statistics': mfa_usage_statistics,
            'security_incidents': security_incidents,
            'supported_methods': {
                'totp': {
                    'enabled': True,
                    'apps': ['Google Authenticator', 'Microsoft Authenticator', 'Authy'],
                    'users': 756
                },
                'sms': {
                    'enabled': True,
                    'provider': 'Twilio',
                    'users': 234
                },
                'push_notification': {
                    'enabled': True,
                    'provider': 'Duo Security',
                    'users': 567
                },
                'hardware_token': {
                    'enabled': True,
                    'types': ['YubiKey', 'Titan Security Key'],
                    'users': 89
                },
                'biometric': {
                    'enabled': True,
                    'types': ['Fingerprint', 'Face ID'],
                    'users': 123
                }
            },
            'recommendations': [
                'IMMEDIATE: Enforce MFA for 11 admin users without MFA',
                'HIGH: Enroll 36 privileged users in MFA',
                'MEDIUM: Encourage adoption of hardware tokens for admins',
                'MEDIUM: Phase out SMS-based MFA (less secure)',
                'Enable MFA for all users within 30 days',
                'Implement adaptive MFA based on risk',
                'Provide MFA setup assistance and documentation',
                'Monitor MFA bypass attempts',
                'Regular MFA compliance audits',
                'User training on MFA importance'
            ],
            'best_practices': [
                'Require MFA for all administrative accounts',
                'Use TOTP or hardware tokens over SMS',
                'Implement adaptive MFA (risk-based)',
                'Provide multiple MFA method options',
                'Generate and store backup codes',
                'Monitor for MFA bypass attempts',
                'Regular MFA enrollment campaigns',
                'Educate users on phishing-resistant MFA',
                'Use push notifications with number matching',
                'Implement device trust with time limits'
            ],
            'reports_generated': [
                f'mfa_{action}_20251116.pdf',
                f'mfa_enrollment_status_20251116.csv',
                f'mfa_compliance_report_20251116.json',
                f'mfa_usage_statistics_20251116.html'
            ],
            'next_steps': [
                'Notify non-enrolled users',
                'Enforce MFA for administrators immediately',
                'Set enforcement deadline for all users',
                'Provide MFA enrollment support',
                'Monitor compliance and follow up',
                'Review and address security incidents'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate MFA management parameters."""
        valid_actions = ['enroll', 'enforce', 'audit', 'report', 'reset']
        action = params.get('action', 'audit')
        if action not in valid_actions:
            self.logger.error(f"Invalid action: {action}")
            return False

        valid_enforcement_modes = ['optional', 'recommended', 'required']
        enforcement_mode = params.get('enforcement_mode', 'required')
        if enforcement_mode not in valid_enforcement_modes:
            self.logger.error(f"Invalid enforcement_mode: {enforcement_mode}")
            return False

        return True
