"""
Encryption Manager Agent

Manages encryption keys, certificates, and encryption policies across
systems and applications. Ensures data is properly encrypted at rest and in transit.
"""

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


class EncryptionManagerAgent(BaseAgent):
    """
    Encryption and key management agent.

    Manages:
    - Encryption keys (symmetric and asymmetric)
    - Certificates (SSL/TLS, code signing)
    - Key rotation policies
    - Encryption at rest and in transit
    - Hardware Security Modules (HSM)
    """

    def __init__(self):
        super().__init__(
            name='encryption-manager',
            description='Manage encryption keys and policies',
            category='security',
            version='1.0.0',
            tags=['encryption', 'keys', 'certificates', 'kms', 'hsm', 'crypto']
        )

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

        Args:
            params: {
                'action': 'generate-key|rotate-key|manage-cert|encrypt-data|decrypt-data|audit',
                'key_type': 'aes-256|rsa-2048|rsa-4096|ecdsa-p256|ecdsa-p384',
                'purpose': 'data-encryption|signing|authentication|tls',
                'key_id': str,
                'options': {
                    'key_store': 'hsm|software|cloud-kms',
                    'rotation_period_days': int,
                    'enable_auto_rotation': bool,
                    'key_material': 'customer|aws|azure|gcp',
                    'multi_region': bool,
                    'backup_keys': bool
                },
                'cert_options': {
                    'common_name': str,
                    'san': List[str],
                    'validity_days': int,
                    'key_usage': List[str],
                    'ca': str
                },
                'encryption_scope': {
                    'databases': List[str],
                    'storage': List[str],
                    'backups': List[str],
                    'logs': List[str]
                },
                'compliance_requirements': ['pci-dss', 'hipaa', 'gdpr']
            }

        Returns:
            {
                'status': 'success|failed',
                'action_result': Dict,
                'keys_managed': int,
                'certificates_managed': int,
                'encryption_coverage': Dict
            }
        """
        action = params.get('action', 'audit')
        key_type = params.get('key_type', 'aes-256')
        purpose = params.get('purpose', 'data-encryption')
        options = params.get('options', {})
        key_store = options.get('key_store', 'cloud-kms')

        self.logger.info(
            f"Encryption manager: {action} - {key_type} ({purpose})"
        )

        result = {
            'status': 'success',
            'action': action,
            'timestamp': '2025-11-16T00:00:00Z'
        }

        if action == 'generate-key':
            key_id = f"key-{key_type}-{purpose}-20251116-001"
            result['action_result'] = {
                'key_id': key_id,
                'key_type': key_type,
                'purpose': purpose,
                'algorithm': key_type.upper(),
                'key_length': 256 if 'aes-256' in key_type else 2048,
                'key_store': key_store,
                'state': 'enabled',
                'creation_date': '2025-11-16T00:00:00Z',
                'rotation_enabled': options.get('enable_auto_rotation', True),
                'rotation_period_days': options.get('rotation_period_days', 90),
                'next_rotation': '2026-02-14T00:00:00Z',
                'multi_region': options.get('multi_region', False),
                'regions': ['us-east-1', 'us-west-2', 'eu-west-1'] if options.get('multi_region') else ['us-east-1'],
                'key_policy': {
                    'allow_encrypt': True,
                    'allow_decrypt': True,
                    'allow_generate_data_key': True,
                    'allow_key_rotation': True
                },
                'tags': {
                    'Environment': 'Production',
                    'Purpose': purpose,
                    'ManagedBy': 'EncryptionManager',
                    'ComplianceScope': 'PCI-DSS,HIPAA'
                }
            }

        elif action == 'rotate-key':
            key_id = params.get('key_id', 'key-existing-001')
            result['action_result'] = {
                'key_id': key_id,
                'rotation_status': 'completed',
                'old_key_version': 'v1',
                'new_key_version': 'v2',
                'rotation_date': '2025-11-16T00:00:00Z',
                'old_key_disabled': False,
                'old_key_deletion_scheduled': '2025-12-16T00:00:00Z',
                're_encryption_required': True,
                'affected_resources': [
                    's3://encrypted-bucket-1',
                    'rds://production-db',
                    'ebs://vol-12345'
                ],
                'resources_re_encrypted': 47,
                'resources_pending': 3
            }

        elif action == 'manage-cert':
            cert_options = params.get('cert_options', {})
            result['action_result'] = {
                'certificate_id': f"cert-{cert_options.get('common_name', 'example.com')}-001",
                'common_name': cert_options.get('common_name', 'example.com'),
                'subject_alternative_names': cert_options.get('san', ['*.example.com', 'example.com']),
                'issuer': cert_options.get('ca', 'InternalCA'),
                'key_algorithm': 'RSA',
                'key_size': 2048,
                'signature_algorithm': 'SHA256WithRSA',
                'validity_days': cert_options.get('validity_days', 365),
                'valid_from': '2025-11-16T00:00:00Z',
                'valid_to': '2026-11-16T00:00:00Z',
                'serial_number': '1234567890ABCDEF',
                'thumbprint': 'A1:B2:C3:D4:E5:F6:A7:B8:C9:D0:E1:F2',
                'key_usage': cert_options.get('key_usage', [
                    'digitalSignature',
                    'keyEncipherment',
                    'dataEncipherment'
                ]),
                'extended_key_usage': [
                    'serverAuth',
                    'clientAuth'
                ],
                'status': 'active',
                'auto_renewal': True,
                'renewal_notification_days': 30
            }

        elif action == 'encrypt-data':
            result['action_result'] = {
                'operation': 'encrypt',
                'key_id': params.get('key_id', 'key-aes-256-001'),
                'algorithm': 'AES-256-GCM',
                'data_encrypted': True,
                'data_size_bytes': 1048576,
                'encrypted_size_bytes': 1048592,
                'encryption_context': {
                    'purpose': 'database-encryption',
                    'environment': 'production'
                },
                'iv': 'Base64EncodedIV==',
                'auth_tag': 'Base64EncodedAuthTag=='
            }

        elif action == 'decrypt-data':
            result['action_result'] = {
                'operation': 'decrypt',
                'key_id': params.get('key_id', 'key-aes-256-001'),
                'algorithm': 'AES-256-GCM',
                'data_decrypted': True,
                'decrypted_size_bytes': 1048576
            }

        elif action == 'audit':
            result['action_result'] = {
                'audit_id': 'encryption-audit-20251116-001',
                'scope': params.get('encryption_scope', {}),
                'keys_managed': 47,
                'certificates_managed': 23,
                'encryption_coverage': {
                    'databases': {
                        'total': 15,
                        'encrypted': 12,
                        'unencrypted': 3,
                        'coverage_percent': 80.0,
                        'unencrypted_list': [
                            'legacy_db_1',
                            'dev_database',
                            'test_database'
                        ]
                    },
                    'storage': {
                        'total_buckets': 45,
                        'encrypted_buckets': 42,
                        'unencrypted_buckets': 3,
                        'coverage_percent': 93.3,
                        'total_size_tb': 125.5,
                        'encrypted_size_tb': 122.1
                    },
                    'backups': {
                        'total': 89,
                        'encrypted': 78,
                        'unencrypted': 11,
                        'coverage_percent': 87.6
                    },
                    'in_transit': {
                        'tls_enabled': 87.5,
                        'tls_1_2_plus': 72.3,
                        'weak_protocols': 12
                    }
                },
                'key_rotation_status': {
                    'total_keys': 47,
                    'rotation_enabled': 39,
                    'rotation_disabled': 8,
                    'overdue_rotation': 5,
                    'upcoming_rotation_30_days': 12
                },
                'certificate_status': {
                    'total_certificates': 23,
                    'active': 18,
                    'expiring_30_days': 3,
                    'expiring_90_days': 7,
                    'expired': 2,
                    'weak_algorithms': 1
                },
                'compliance_gaps': [
                    {
                        'regulation': 'PCI-DSS',
                        'requirement': '3.4',
                        'issue': 'Cardholder data not encrypted in 3 databases',
                        'severity': 'critical'
                    },
                    {
                        'regulation': 'HIPAA',
                        'requirement': '164.312(a)(2)(iv)',
                        'issue': 'PHI in 2 backups not encrypted',
                        'severity': 'critical'
                    },
                    {
                        'regulation': 'GDPR',
                        'requirement': 'Article 32',
                        'issue': 'Personal data in 11 backup files not encrypted',
                        'severity': 'high'
                    }
                ],
                'recommendations': [
                    'Encrypt 3 unencrypted databases immediately',
                    'Enable encryption for all backup systems',
                    'Renew 2 expired certificates',
                    'Enable automatic key rotation for 8 keys',
                    'Rotate 5 overdue keys',
                    'Upgrade weak TLS protocols to 1.2+',
                    'Replace weak certificate algorithms'
                ]
            }

        # Add summary metrics
        result['keys_managed'] = 47
        result['certificates_managed'] = 23
        result['encryption_coverage'] = {
            'overall_coverage_percent': 86.5,
            'databases_encrypted_percent': 80.0,
            'storage_encrypted_percent': 93.3,
            'backups_encrypted_percent': 87.6,
            'transit_encrypted_percent': 87.5
        }
        result['compliance_status'] = {
            'pci-dss': 'non-compliant',
            'hipaa': 'non-compliant',
            'gdpr': 'partial'
        }
        result['next_steps'] = [
            'Address critical compliance gaps',
            'Encrypt all unencrypted sensitive data',
            'Enable automatic key rotation',
            'Renew expiring certificates',
            'Implement HSM for critical keys'
        ]

        return result

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate encryption management parameters."""
        valid_actions = ['generate-key', 'rotate-key', 'manage-cert', 'encrypt-data', 'decrypt-data', 'audit']
        action = params.get('action', 'audit')
        if action not in valid_actions:
            self.logger.error(f"Invalid action: {action}")
            return False

        if action in ['generate-key', 'encrypt-data']:
            valid_key_types = ['aes-256', 'aes-128', 'rsa-2048', 'rsa-4096', 'ecdsa-p256', 'ecdsa-p384']
            key_type = params.get('key_type', 'aes-256')
            if key_type not in valid_key_types:
                self.logger.error(f"Invalid key_type: {key_type}")
                return False

        if action in ['rotate-key', 'decrypt-data'] and 'key_id' not in params:
            self.logger.error("key_id required for this action")
            return False

        return True
