# CyberArk Intelligent Password Rotation Engine
import asyncio
import json
from datetime import datetime, timedelta
from typing import Dict, List, Optional
import aiohttp
from cryptography.fernet import Fernet

class CyberArkAutomationEngine:
    """Enterprise CyberArk automation for Panasonic Gigafactory"""
    
    def __init__(self, vault_config: Dict[str, str]):
        self.vault_url = vault_config['url']
        self.api_version = vault_config.get('api_version', 'v2')
        self.session = None
        self.metrics = {
            'rotations_completed': 0,
            'rotations_failed': 0,
            'avg_rotation_time': 0
        }
        
    async def intelligent_rotation_scheduler(self):
        """AI-driven password rotation based on risk scoring"""
        accounts = await self.get_privileged_accounts()
        
        for account in accounts:
            risk_score = self.calculate_risk_score(account)
            
            if risk_score > 80:
                # Critical risk - immediate rotation
                await self.rotate_password(account, priority='critical')
            elif risk_score > 60:
                # High risk - schedule within 24 hours
                await self.schedule_rotation(account, hours=24)
            elif risk_score > 40:
                # Medium risk - standard rotation cycle
                await self.schedule_rotation(account, hours=72)
                
    def calculate_risk_score(self, account: Dict) -> int:
        """Calculate risk score based on multiple factors"""
        score = 0
        
        # Account type scoring
        if account['type'] == 'service_account':
            score += 20
        if account['privileged_level'] == 'domain_admin':
            score += 30
            
        # Access pattern analysis
        if account['unusual_activity']:
            score += 25
        if account['failed_attempts'] > 3:
            score += 15
            
        # Compliance factors
        days_since_rotation = (datetime.now() - 
                             datetime.fromisoformat(account['last_rotation'])).days
        if days_since_rotation > 90:
            score += 20
        elif days_since_rotation > 60:
            score += 10
            
        return min(score, 100)
        
    async def rotate_password(self, account: Dict, priority: str = 'normal'):
        """Execute password rotation with rollback capability"""
        rotation_id = f"ROT-{datetime.now().strftime('%Y%m%d%H%M%S')}"
        
        try:
            # Create backup before rotation
            backup = await self.create_credential_backup(account)
            
            # Generate new password based on policy
            new_password = self.generate_secure_password(account['policy'])
            
            # Update in CyberArk
            result = await self.update_account_password(
                account['id'], 
                new_password,
                rotation_id
            )
            
            # Verify rotation success
            if await self.verify_rotation(account['id'], rotation_id):
                self.metrics['rotations_completed'] += 1
                await self.notify_success(account, rotation_id)
            else:
                # Rollback on failure
                await self.rollback_password(account, backup)
                self.metrics['rotations_failed'] += 1
                
        except Exception as e:
            await self.handle_rotation_failure(account, e, backup)
            
    async def create_vault_health_report(self) -> Dict:
        """Generate comprehensive vault health metrics"""
        health_data = {
            'timestamp': datetime.now().isoformat(),
            'vault_status': await self.check_vault_status(),
            'performance_metrics': {
                'cpu_usage': await self.get_vault_cpu(),
                'memory_usage': await self.get_vault_memory(),
                'disk_usage': await self.get_vault_disk(),
                'active_sessions': await self.get_active_sessions()
            },
            'security_metrics': {
                'failed_auth_attempts': await self.get_failed_auths(),
                'suspicious_activities': await self.detect_anomalies(),
                'compliance_status': await self.check_compliance()
            },
            'rotation_metrics': self.metrics
        }
        
        return health_data