#!/usr/bin/env python3
"""
Enterprise Backup and Disaster Recovery Automation Framework
"""

import subprocess
import json
import yaml
import logging
import time
import threading
import hashlib
import boto3
import paramiko
from typing import Dict, List, Optional, Tuple, Any, Union
from dataclasses import dataclass, asdict, field
from pathlib import Path
from enum import Enum
import concurrent.futures
import datetime
import schedule
import psutil

class BackupType(Enum):
    FULL = "full"
    INCREMENTAL = "incremental"
    DIFFERENTIAL = "differential"
    SNAPSHOT = "snapshot"
    CDP = "continuous_data_protection"

class BackupStatus(Enum):
    PENDING = "pending"
    RUNNING = "running"
    COMPLETED = "completed"
    FAILED = "failed"
    VERIFIED = "verified"

class RecoveryTier(Enum):
    TIER1 = "tier1"  # Mission-critical
    TIER2 = "tier2"  # Business-critical
    TIER3 = "tier3"  # Important
    TIER4 = "tier4"  # Standard
    TIER5 = "tier5"  # Archive

@dataclass
class BackupTarget:
    name: str
    path: str
    backup_type: BackupType
    tier: RecoveryTier
    schedule: str  # Cron expression
    retention_policy: Dict[str, int]
    encryption_enabled: bool = True
    compression_enabled: bool = True
    verification_enabled: bool = True
    remote_destinations: List[str] = field(default_factory=list)
    exclude_patterns: List[str] = field(default_factory=list)

@dataclass
class BackupJob:
    job_id: str
    target: BackupTarget
    start_time: datetime.datetime
    end_time: Optional[datetime.datetime] = None
    status: BackupStatus = BackupStatus.PENDING
    size_bytes: int = 0
    compressed_size_bytes: int = 0
    files_processed: int = 0
    error_message: Optional[str] = None
    checksum: Optional[str] = None
    destination_paths: List[str] = field(default_factory=list)

@dataclass
class DisasterRecoveryPlan:
    plan_id: str
    name: str
    description: str
    recovery_tier: RecoveryTier
    rto_minutes: int
    rpo_minutes: int
    dependencies: List[str] = field(default_factory=list)
    recovery_steps: List[Dict] = field(default_factory=list)
    validation_tests: List[Dict] = field(default_factory=list)
    contact_list: List[str] = field(default_factory=list)

class EnterpriseBackupFramework:
    def __init__(self, config_file: str = "backup_config.yaml"):
        self.config = self._load_config(config_file)
        self.backup_targets = {}
        self.backup_jobs = {}
        self.dr_plans = {}
        self.storage_backends = {}
        
        # Initialize logging
        logging.basicConfig(
            level=logging.INFO,
            format='%(asctime)s - %(levelname)s - %(message)s',
            handlers=[
                logging.FileHandler('/var/log/backup_framework.log'),
                logging.StreamHandler()
            ]
        )
        self.logger = logging.getLogger(__name__)
        
        # Initialize storage backends
        self._initialize_storage_backends()
        
    def _load_config(self, config_file: str) -> Dict:
        """Load backup configuration from YAML file"""
        try:
            with open(config_file, 'r') as f:
                return yaml.safe_load(f)
        except FileNotFoundError:
            return self._create_default_config()
    
    def _create_default_config(self) -> Dict:
        """Create default backup configuration"""
        return {
            'storage': {
                'local': {
                    'enabled': True,
                    'path': '/backup/local'
                },
                's3': {
                    'enabled': True,
                    'bucket': 'enterprise-backups',
                    'region': 'us-west-2',
                    'storage_class': 'STANDARD_IA'
                },
                'azure': {
                    'enabled': False,
                    'container': 'backups',
                    'storage_account': 'enterprisebackups'
                }
            },
            'encryption': {
                'algorithm': 'AES-256-GCM',
                'key_management': 'aws_kms',
                'key_id': 'arn:aws:kms:us-west-2:123456789012:key/12345678-1234-1234-1234-123456789012'
            },
            'compression': {
                'algorithm': 'zstd',
                'level': 3
            },
            'notification': {
                'email': {
                    'enabled': True,
                    'smtp_server': 'smtp.company.com',
                    'recipients': ['backup-team@company.com']
                },
                'slack': {
                    'enabled': True,
                    'webhook_url': 'https://hooks.slack.com/services/YOUR/SLACK/WEBHOOK'
                }
            }
        }
    
    def _initialize_storage_backends(self):
        """Initialize configured storage backends"""
        storage_config = self.config.get('storage', {})
        
        # AWS S3 Backend
        if storage_config.get('s3', {}).get('enabled', False):
            try:
                self.storage_backends['s3'] = boto3.client('s3')
                self.logger.info("AWS S3 storage backend initialized")
            except Exception as e:
                self.logger.error(f"Failed to initialize S3 backend: {e}")
        
        # Local storage backend
        if storage_config.get('local', {}).get('enabled', False):
            local_path = storage_config['local']['path']
            Path(local_path).mkdir(parents=True, exist_ok=True)
            self.storage_backends['local'] = local_path
            self.logger.info(f"Local storage backend initialized: {local_path}")
    
    def register_backup_target(self, target: BackupTarget):
        """Register a new backup target"""
        self.backup_targets[target.name] = target
        self.logger.info(f"Registered backup target: {target.name}")
        
        # Schedule backup job
        self._schedule_backup_job(target)
    
    def _schedule_backup_job(self, target: BackupTarget):
        """Schedule backup job based on target configuration"""
        def job_wrapper():
            self.create_backup(target.name)
        
        # Parse cron schedule and register with scheduler
        schedule.every().day.at("02:00").do(job_wrapper)  # Default daily at 2 AM
        self.logger.info(f"Scheduled backup job for {target.name}: {target.schedule}")
    
    def create_backup(self, target_name: str) -> str:
        """Create backup for specified target"""
        if target_name not in self.backup_targets:
            raise ValueError(f"Backup target not found: {target_name}")
        
        target = self.backup_targets[target_name]
        job_id = f"{target_name}_{int(time.time())}"
        
        job = BackupJob(
            job_id=job_id,
            target=target,
            start_time=datetime.datetime.now(),
            status=BackupStatus.RUNNING
        )
        
        self.backup_jobs[job_id] = job
        self.logger.info(f"Starting backup job: {job_id}")
        
        try:
            # Create backup based on type
            if target.backup_type == BackupType.FULL:
                self._create_full_backup(job)
            elif target.backup_type == BackupType.INCREMENTAL:
                self._create_incremental_backup(job)
            elif target.backup_type == BackupType.SNAPSHOT:
                self._create_snapshot_backup(job)
            elif target.backup_type == BackupType.CDP:
                self._create_cdp_backup(job)
            
            job.status = BackupStatus.COMPLETED
            job.end_time = datetime.datetime.now()
            
            # Verify backup if enabled
            if target.verification_enabled:
                self._verify_backup(job)
            
            # Upload to remote destinations
            self._upload_to_remote_destinations(job)
            
            # Apply retention policy
            self._apply_retention_policy(target)
            
            # Send notifications
            self._send_backup_notification(job, success=True)
            
            self.logger.info(f"Backup job completed successfully: {job_id}")
            
        except Exception as e:
            job.status = BackupStatus.FAILED
            job.end_time = datetime.datetime.now()
            job.error_message = str(e)
            
            self.logger.error(f"Backup job failed: {job_id} - {e}")
            self._send_backup_notification(job, success=False)
            
        return job_id
    
    def _create_full_backup(self, job: BackupJob):
        """Create full backup using rsync and tar"""
        target = job.target
        timestamp = int(time.time())
        backup_name = f"{target.name}_full_{timestamp}"
        
        # Create local backup directory
        local_backup_path = Path(self.storage_backends['local']) / backup_name
        local_backup_path.mkdir(parents=True, exist_ok=True)
        
        # Build rsync command
        rsync_cmd = [
            'rsync', '-avz', '--progress',
            '--exclude-from=/dev/stdin' if target.exclude_patterns else '',
            target.path,
            str(local_backup_path)
        ]
        
        if target.exclude_patterns:
            # Create exclude file
            exclude_input = '\n'.join(target.exclude_patterns)
            process = subprocess.Popen(
                rsync_cmd,
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE,
                text=True
            )
            stdout, stderr = process.communicate(input=exclude_input)
        else:
            # Remove empty exclude flag
            rsync_cmd = [cmd for cmd in rsync_cmd if cmd != '--exclude-from=/dev/stdin']
            process = subprocess.run(rsync_cmd, capture_output=True, text=True)
            stdout, stderr = process.stdout, process.stderr
        
        if process.returncode != 0:
            raise Exception(f"Rsync failed: {stderr}")
        
        # Create compressed archive if compression enabled
        if target.compression_enabled:
            archive_path = f"{local_backup_path}.tar.zst"
            tar_cmd = [
                'tar', '--zstd', '-cf', archive_path, '-C', str(local_backup_path.parent), backup_name
            ]
            
            result = subprocess.run(tar_cmd, capture_output=True, text=True)
            if result.returncode != 0:
                raise Exception(f"Compression failed: {result.stderr}")
            
            # Remove uncompressed directory
            subprocess.run(['rm', '-rf', str(local_backup_path)])
            backup_path = archive_path
        else:
            backup_path = str(local_backup_path)
        
        # Calculate backup size and checksum
        job.size_bytes = self._get_path_size(backup_path)
        job.checksum = self._calculate_checksum(backup_path)
        job.destination_paths.append(backup_path)
        
        self.logger.info(f"Full backup created: {backup_path}")
    
    def _create_incremental_backup(self, job: BackupJob):
        """Create incremental backup using rsync hard links"""
        target = job.target
        timestamp = int(time.time())
        backup_name = f"{target.name}_inc_{timestamp}"
        
        # Find most recent backup for hard link reference
        previous_backup = self._find_latest_backup(target.name)
        
        local_backup_path = Path(self.storage_backends['local']) / backup_name
        local_backup_path.mkdir(parents=True, exist_ok=True)
        
        # Build incremental rsync command
        rsync_cmd = [
            'rsync', '-avz', '--progress', '--delete',
            '--link-dest', str(previous_backup) if previous_backup else '',
            target.path,
            str(local_backup_path)
        ]
        
        if not previous_backup:
            rsync_cmd.remove('--link-dest')
            rsync_cmd.remove('')
        
        result = subprocess.run(rsync_cmd, capture_output=True, text=True)
        if result.returncode != 0:
            raise Exception(f"Incremental backup failed: {result.stderr}")
        
        job.size_bytes = self._get_path_size(str(local_backup_path))
        job.checksum = self._calculate_directory_checksum(str(local_backup_path))
        job.destination_paths.append(str(local_backup_path))
        
        self.logger.info(f"Incremental backup created: {local_backup_path}")
    
    def _create_snapshot_backup(self, job: BackupJob):
        """Create filesystem snapshot backup using LVM or ZFS"""
        target = job.target
        timestamp = int(time.time())
        snapshot_name = f"{target.name}_snap_{timestamp}"
        
        # Detect filesystem type
        fs_type = self._detect_filesystem_type(target.path)
        
        if fs_type == 'lvm':
            self._create_lvm_snapshot(target, snapshot_name, job)
        elif fs_type == 'zfs':
            self._create_zfs_snapshot(target, snapshot_name, job)
        else:
            # Fallback to full backup
            self._create_full_backup(job)
    
    def _create_lvm_snapshot(self, target: BackupTarget, snapshot_name: str, job: BackupJob):
        """Create LVM snapshot"""
        # Determine LV path
        lv_path = self._get_logical_volume_path(target.path)
        if not lv_path:
            raise Exception(f"Could not determine LV path for {target.path}")
        
        snapshot_path = f"{lv_path}_snapshot"
        
        # Create LVM snapshot
        lvcreate_cmd = [
            'lvcreate', '-L', '10G', '-s', '-n', snapshot_name, lv_path
        ]
        
        result = subprocess.run(lvcreate_cmd, capture_output=True, text=True)
        if result.returncode != 0:
            raise Exception(f"LVM snapshot creation failed: {result.stderr}")
        
        try:
            # Mount snapshot
            mount_point = f"/mnt/{snapshot_name}"
            Path(mount_point).mkdir(parents=True, exist_ok=True)
            
            mount_cmd = ['mount', f"/dev/mapper/{snapshot_name}", mount_point]
            subprocess.run(mount_cmd, check=True)
            
            # Create backup from snapshot
            backup_target = BackupTarget(
                name=f"{target.name}_snapshot",
                path=mount_point,
                backup_type=BackupType.FULL,
                tier=target.tier,
                schedule=target.schedule,
                retention_policy=target.retention_policy
            )
            
            temp_job = BackupJob(
                job_id=f"{job.job_id}_snapshot",
                target=backup_target,
                start_time=job.start_time
            )
            
            self._create_full_backup(temp_job)
            
            # Copy results to main job
            job.size_bytes = temp_job.size_bytes
            job.checksum = temp_job.checksum
            job.destination_paths = temp_job.destination_paths
            
        finally:
            # Cleanup snapshot
            subprocess.run(['umount', mount_point], capture_output=True)
            subprocess.run(['lvremove', '-f', f"/dev/mapper/{snapshot_name}"], capture_output=True)
            Path(mount_point).rmdir()
    
    def _create_zfs_snapshot(self, target: BackupTarget, snapshot_name: str, job: BackupJob):
        """Create ZFS snapshot"""
        # Get ZFS dataset
        dataset = self._get_zfs_dataset(target.path)
        if not dataset:
            raise Exception(f"Could not determine ZFS dataset for {target.path}")
        
        snapshot_full_name = f"{dataset}@{snapshot_name}"
        
        # Create ZFS snapshot
        zfs_cmd = ['zfs', 'snapshot', snapshot_full_name]
        result = subprocess.run(zfs_cmd, capture_output=True, text=True)
        if result.returncode != 0:
            raise Exception(f"ZFS snapshot creation failed: {result.stderr}")
        
        try:
            # Send snapshot to backup location
            backup_file = f"{self.storage_backends['local']}/{snapshot_name}.zfs"
            
            zfs_send_cmd = ['zfs', 'send', snapshot_full_name]
            with open(backup_file, 'wb') as f:
                result = subprocess.run(zfs_send_cmd, stdout=f, stderr=subprocess.PIPE)
                if result.returncode != 0:
                    raise Exception(f"ZFS send failed: {result.stderr.decode()}")
            
            job.size_bytes = self._get_path_size(backup_file)
            job.checksum = self._calculate_checksum(backup_file)
            job.destination_paths.append(backup_file)
            
        finally:
            # Remove snapshot
            subprocess.run(['zfs', 'destroy', snapshot_full_name], capture_output=True)
    
    def _verify_backup(self, job: BackupJob):
        """Verify backup integrity"""
        self.logger.info(f"Verifying backup: {job.job_id}")
        
        for backup_path in job.destination_paths:
            if not Path(backup_path).exists():
                raise Exception(f"Backup file not found: {backup_path}")
            
            # Verify checksum
            current_checksum = self._calculate_checksum(backup_path)
            if current_checksum != job.checksum:
                raise Exception(f"Checksum mismatch for {backup_path}")
            
            # Verify archive integrity if compressed
            if backup_path.endswith('.tar.zst'):
                test_cmd = ['tar', '--zstd', '-tf', backup_path]
                result = subprocess.run(test_cmd, capture_output=True)
                if result.returncode != 0:
                    raise Exception(f"Archive integrity check failed: {backup_path}")
        
        job.status = BackupStatus.VERIFIED
        self.logger.info(f"Backup verification successful: {job.job_id}")
    
    def _upload_to_remote_destinations(self, job: BackupJob):
        """Upload backup to configured remote destinations"""
        target = job.target
        
        for destination in target.remote_destinations:
            if destination.startswith('s3://'):
                self._upload_to_s3(job, destination)
            elif destination.startswith('azure://'):
                self._upload_to_azure(job, destination)
            elif destination.startswith('ftp://') or destination.startswith('sftp://'):
                self._upload_to_ftp(job, destination)
    
    def _upload_to_s3(self, job: BackupJob, s3_destination: str):
        """Upload backup to Amazon S3"""
        if 's3' not in self.storage_backends:
            self.logger.warning("S3 backend not initialized, skipping S3 upload")
            return
        
        s3_client = self.storage_backends['s3']
        bucket_name = self.config['storage']['s3']['bucket']
        
        for local_path in job.destination_paths:
            object_key = f"{job.target.name}/{Path(local_path).name}"
            
            try:
                # Upload with server-side encryption
                s3_client.upload_file(
                    local_path,
                    bucket_name,
                    object_key,
                    ExtraArgs={
                        'ServerSideEncryption': 'aws:kms',
                        'SSEKMSKeyId': self.config['encryption']['key_id'],
                        'StorageClass': self.config['storage']['s3']['storage_class']
                    }
                )
                
                self.logger.info(f"Uploaded to S3: s3://{bucket_name}/{object_key}")
                
            except Exception as e:
                self.logger.error(f"S3 upload failed: {e}")
                raise
    
    def _apply_retention_policy(self, target: BackupTarget):
        """Apply retention policy to remove old backups"""
        retention = target.retention_policy
        
        # Get list of backups for this target
        backups = self._list_backups(target.name)
        
        # Sort by creation time (newest first)
        backups.sort(key=lambda x: x['created'], reverse=True)
        
        # Apply retention rules
        to_delete = []
        
        # Keep daily backups
        daily_count = retention.get('daily', 7)
        daily_backups = [b for b in backups if b['type'] in ['full', 'incremental']]
        if len(daily_backups) > daily_count:
            to_delete.extend(daily_backups[daily_count:])
        
        # Keep weekly backups
        weekly_count = retention.get('weekly', 4)
        weekly_backups = [b for b in backups if b['type'] == 'weekly']
        if len(weekly_backups) > weekly_count:
            to_delete.extend(weekly_backups[weekly_count:])
        
        # Keep monthly backups
        monthly_count = retention.get('monthly', 12)
        monthly_backups = [b for b in backups if b['type'] == 'monthly']
        if len(monthly_backups) > monthly_count:
            to_delete.extend(monthly_backups[monthly_count:])
        
        # Delete old backups
        for backup in to_delete:
            self._delete_backup(backup)
            self.logger.info(f"Deleted old backup: {backup['path']}")
    
    def create_disaster_recovery_plan(self, plan: DisasterRecoveryPlan):
        """Create comprehensive disaster recovery plan"""
        self.dr_plans[plan.plan_id] = plan
        
        # Generate recovery procedures
        recovery_procedures = self._generate_recovery_procedures(plan)
        
        # Create recovery scripts
        self._create_recovery_scripts(plan, recovery_procedures)
        
        # Schedule DR testing
        self._schedule_dr_testing(plan)
        
        self.logger.info(f"Created DR plan: {plan.plan_id}")
    
    def _generate_recovery_procedures(self, plan: DisasterRecoveryPlan) -> List[Dict]:
        """Generate detailed recovery procedures"""
        procedures = []
        
        if plan.recovery_tier in [RecoveryTier.TIER1, RecoveryTier.TIER2]:
            # High-priority recovery procedures
            procedures.extend([
                {
                    'step': 1,
                    'action': 'assess_damage',
                    'description': 'Assess extent of system damage and data loss',
                    'estimated_time': 5,
                    'automation_level': 'manual'
                },
                {
                    'step': 2,
                    'action': 'activate_standby',
                    'description': 'Activate standby systems and failover procedures',
                    'estimated_time': 10,
                    'automation_level': 'automated'
                },
                {
                    'step': 3,
                    'action': 'restore_data',
                    'description': 'Restore data from most recent backup',
                    'estimated_time': plan.rto_minutes - 20,
                    'automation_level': 'automated'
                },
                {
                    'step': 4,
                    'action': 'verify_integrity',
                    'description': 'Verify data integrity and application functionality',
                    'estimated_time': 5,
                    'automation_level': 'automated'
                }
            ])
        else:
            # Standard recovery procedures
            procedures.extend([
                {
                    'step': 1,
                    'action': 'notification',
                    'description': 'Notify stakeholders of recovery initiation',
                    'estimated_time': 15,
                    'automation_level': 'automated'
                },
                {
                    'step': 2,
                    'action': 'provision_resources',
                    'description': 'Provision replacement infrastructure resources',
                    'estimated_time': 60,
                    'automation_level': 'semi_automated'
                },
                {
                    'step': 3,
                    'action': 'restore_full_backup',
                    'description': 'Restore from full backup archive',
                    'estimated_time': plan.rto_minutes - 90,
                    'automation_level': 'automated'
                },
                {
                    'step': 4,
                    'action': 'testing_validation',
                    'description': 'Comprehensive testing and validation',
                    'estimated_time': 15,
                    'automation_level': 'manual'
                }
            ])
        
        return procedures
    
    def initiate_disaster_recovery(self, plan_id: str) -> str:
        """Initiate disaster recovery procedure"""
        if plan_id not in self.dr_plans:
            raise ValueError(f"DR plan not found: {plan_id}")
        
        plan = self.dr_plans[plan_id]
        recovery_id = f"dr_{plan_id}_{int(time.time())}"
        
        self.logger.critical(f"DISASTER RECOVERY INITIATED: {recovery_id}")
        
        # Send immediate notifications
        self._send_dr_notification(plan, "initiated", recovery_id)
        
        # Execute recovery procedures
        try:
            for step in plan.recovery_steps:
                self.logger.info(f"Executing DR step: {step['action']}")
                self._execute_recovery_step(step, plan)
            
            # Run validation tests
            validation_results = self._run_validation_tests(plan)
            
            if all(test['passed'] for test in validation_results):
                self.logger.info(f"Disaster recovery completed successfully: {recovery_id}")
                self._send_dr_notification(plan, "completed", recovery_id)
            else:
                self.logger.error(f"Disaster recovery validation failed: {recovery_id}")
                self._send_dr_notification(plan, "failed", recovery_id)
                
        except Exception as e:
            self.logger.error(f"Disaster recovery failed: {recovery_id} - {e}")
            self._send_dr_notification(plan, "failed", recovery_id, str(e))
            raise
        
        return recovery_id
    
    def _execute_recovery_step(self, step: Dict, plan: DisasterRecoveryPlan):
        """Execute individual recovery step"""
        action = step['action']
        
        if action == 'activate_standby':
            self._activate_standby_systems(plan)
        elif action == 'restore_data':
            self._restore_data_from_backup(plan)
        elif action == 'provision_resources':
            self._provision_replacement_resources(plan)
        elif action == 'verify_integrity':
            self._verify_system_integrity(plan)
        else:
            self.logger.warning(f"Unknown recovery action: {action}")
    
    def _activate_standby_systems(self, plan: DisasterRecoveryPlan):
        """Activate standby systems and failover"""
        # Implementation would include:
        # - DNS failover
        # - Load balancer reconfiguration
        # - Database failover
        # - Application server activation
        self.logger.info("Activating standby systems...")
        
        # Example: Update DNS records for failover
        # self._update_dns_records(plan.failover_endpoints)
        
        # Example: Activate standby database
        # self._promote_standby_database(plan.database_config)
    
    def _restore_data_from_backup(self, plan: DisasterRecoveryPlan):
        """Restore data from most recent backup"""
        self.logger.info("Restoring data from backup...")
        
        # Find most recent backup for critical systems
        for dependency in plan.dependencies:
            if dependency in self.backup_targets:
                latest_backup = self._find_latest_backup(dependency)
                if latest_backup:
                    self._restore_backup(latest_backup, dependency)
                else:
                    raise Exception(f"No backup found for critical dependency: {dependency}")
    
    def generate_comprehensive_report(self) -> Dict[str, Any]:
        """Generate comprehensive backup and DR status report"""
        report = {
            'timestamp': datetime.datetime.now().isoformat(),
            'backup_status': {
                'total_targets': len(self.backup_targets),
                'successful_backups': 0,
                'failed_backups': 0,
                'pending_backups': 0
            },
            'storage_utilization': {},
            'dr_plans': {
                'total_plans': len(self.dr_plans),
                'last_test_date': None,
                'compliance_status': 'compliant'
            },
            'alerts': []
        }
        
        # Analyze backup job statuses
        for job in self.backup_jobs.values():
            if job.status == BackupStatus.COMPLETED:
                report['backup_status']['successful_backups'] += 1
            elif job.status == BackupStatus.FAILED:
                report['backup_status']['failed_backups'] += 1
            elif job.status in [BackupStatus.PENDING, BackupStatus.RUNNING]:
                report['backup_status']['pending_backups'] += 1
        
        # Calculate storage utilization
        if 'local' in self.storage_backends:
            local_path = self.storage_backends['local']
            total_size = self._get_directory_size(local_path)
            report['storage_utilization']['local'] = {
                'total_bytes': total_size,
                'total_human': self._format_bytes(total_size)
            }
        
        # Check for alerts
        current_time = datetime.datetime.now()
        for target in self.backup_targets.values():
            latest_backup = self._find_latest_backup(target.name)
            if not latest_backup:
                report['alerts'].append({
                    'severity': 'critical',
                    'message': f"No backup found for target: {target.name}"
                })
                continue
            
            # Check if backup is too old based on tier
            max_age_hours = self._get_max_backup_age(target.tier)
            backup_age = (current_time - latest_backup['created']).total_seconds() / 3600
            
            if backup_age > max_age_hours:
                report['alerts'].append({
                    'severity': 'warning',
                    'message': f"Backup for {target.name} is {backup_age:.1f} hours old"
                })
        
        return report
    
    # Helper methods
    def _get_path_size(self, path: str) -> int:
        """Get size of file or directory"""
        if Path(path).is_file():
            return Path(path).stat().st_size
        else:
            return sum(f.stat().st_size for f in Path(path).rglob('*') if f.is_file())
    
    def _calculate_checksum(self, file_path: str) -> str:
        """Calculate SHA256 checksum of file"""
        sha256_hash = hashlib.sha256()
        with open(file_path, "rb") as f:
            for chunk in iter(lambda: f.read(4096), b""):
                sha256_hash.update(chunk)
        return sha256_hash.hexdigest()
    
    def _format_bytes(self, bytes_value: int) -> str:
        """Format bytes in human readable format"""
        for unit in ['B', 'KB', 'MB', 'GB', 'TB']:
            if bytes_value < 1024.0:
                return f"{bytes_value:.2f} {unit}"
            bytes_value /= 1024.0
        return f"{bytes_value:.2f} PB"
    
    def _send_backup_notification(self, job: BackupJob, success: bool):
        """Send backup completion notification"""
        subject = f"Backup {'Completed' if success else 'Failed'}: {job.target.name}"
        
        message = f"""
        Backup Job Report
        =================
        Job ID: {job.job_id}
        Target: {job.target.name}
        Status: {'Success' if success else 'Failed'}
        Start Time: {job.start_time}
        End Time: {job.end_time}
        Size: {self._format_bytes(job.size_bytes)}
        
        {'Error: ' + job.error_message if not success else ''}
        """
        
        # Send email notification
        # Implementation would use SMTP
        
        # Send Slack notification
        # Implementation would use Slack webhook
        
        self.logger.info(f"Notification sent for job: {job.job_id}")

def main():
    """Main execution function"""
    # Initialize backup framework
    backup_framework = EnterpriseBackupFramework()
    
    # Register backup targets
    print("Registering backup targets...")
    
    # Critical database backup
    db_target = BackupTarget(
        name="production_database",
        path="/var/lib/postgresql/data",
        backup_type=BackupType.SNAPSHOT,
        tier=RecoveryTier.TIER1,
        schedule="0 */2 * * *",  # Every 2 hours
        retention_policy={'daily': 7, 'weekly': 4, 'monthly': 12},
        remote_destinations=['s3://enterprise-backups/database/']
    )
    backup_framework.register_backup_target(db_target)
    
    # Application code backup
    app_target = BackupTarget(
        name="application_code",
        path="/opt/applications",
        backup_type=BackupType.INCREMENTAL,
        tier=RecoveryTier.TIER2,
        schedule="0 1 * * *",  # Daily at 1 AM
        retention_policy={'daily': 14, 'weekly': 8, 'monthly': 6},
        exclude_patterns=['*.log', '*.tmp', 'node_modules/'],
        remote_destinations=['s3://enterprise-backups/applications/']
    )
    backup_framework.register_backup_target(app_target)
    
    # Create disaster recovery plan
    print("Creating disaster recovery plan...")
    dr_plan = DisasterRecoveryPlan(
        plan_id="critical_systems_dr",
        name="Critical Systems Disaster Recovery",
        description="Recovery plan for mission-critical systems",
        recovery_tier=RecoveryTier.TIER1,
        rto_minutes=15,
        rpo_minutes=5,
        dependencies=["production_database", "application_code"],
        contact_list=["admin@company.com", "dr-team@company.com"]
    )
    backup_framework.create_disaster_recovery_plan(dr_plan)
    
    # Generate status report
    print("Generating backup status report...")
    report = backup_framework.generate_comprehensive_report()
    
    print("\nBackup Framework Status Report")
    print("==============================")
    print(f"Total Backup Targets: {report['backup_status']['total_targets']}")
    print(f"Successful Backups: {report['backup_status']['successful_backups']}")
    print(f"Failed Backups: {report['backup_status']['failed_backups']}")
    print(f"DR Plans: {report['dr_plans']['total_plans']}")
    
    if report['alerts']:
        print(f"\nAlerts ({len(report['alerts'])}):")
        for alert in report['alerts']:
            print(f"  {alert['severity'].upper()}: {alert['message']}")
    else:
        print("\n✅ No alerts - All systems healthy")
    
    print("\nFramework initialized successfully!")
    print("Use 'python backup_framework.py --help' for available commands")

if __name__ == "__main__":
    main()

#!/bin/bash
# Enterprise Multi-Site Disaster Recovery Script

set -euo pipefail

# Global configuration
declare -A SITES=(
    ["primary"]="us-east-1"
    ["secondary"]="us-west-2"
    ["tertiary"]="eu-west-1"
)

declare -A REPLICATION_CONFIG=(
    ["database"]="synchronous"
    ["files"]="asynchronous"
    ["config"]="synchronous"
)

# Site health monitoring
check_site_health() {
    local site="$1"
    local region="${SITES[$site]}"
    
    echo "Checking health of site: $site ($region)"
    
    # Check network connectivity
    if ! ping -c 3 "${site}.company.com" > /dev/null 2>&1; then
        echo "❌ Network connectivity failed for $site"
        return 1
    fi
    
    # Check database connectivity
    if ! nc -z "${site}-db.company.com" 5432; then
        echo "❌ Database connectivity failed for $site"
        return 1
    fi
    
    # Check application services
    if ! curl -f "https://${site}-api.company.com/health" > /dev/null 2>&1; then
        echo "❌ Application health check failed for $site"
        return 1
    fi
    
    echo "✅ Site $site is healthy"
    return 0
}

# Automated failover procedure
initiate_failover() {
    local failed_site="$1"
    local target_site="$2"
    
    echo "🚨 INITIATING FAILOVER: $failed_site → $target_site"
    
    # Step 1: Stop accepting new connections to failed site
    echo "Step 1: Blocking traffic to failed site..."
    update_dns_records "$failed_site" "maintenance"
    update_load_balancer "$failed_site" "drain"
    
    # Step 2: Promote secondary site to primary
    echo "Step 2: Promoting $target_site to primary..."
    promote_database_replica "$target_site"
    update_application_config "$target_site" "primary"
    
    # Step 3: Update DNS to point to new primary
    echo "Step 3: Updating DNS records..."
    update_dns_records "$target_site" "active"
    
    # Step 4: Verify failover success
    echo "Step 4: Verifying failover..."
    if verify_failover_success "$target_site"; then
        echo "✅ Failover completed successfully"
        send_failover_notification "success" "$failed_site" "$target_site"
    else
        echo "❌ Failover verification failed"
        send_failover_notification "failed" "$failed_site" "$target_site"
        return 1
    fi
}

# Database replication management
setup_database_replication() {
    local primary_site="$1"
    local replica_site="$2"
    local replication_type="${3:-asynchronous}"
    
    echo "Setting up database replication: $primary_site → $replica_site ($replication_type)"
    
    # Configure primary database for replication
    configure_primary_database "$primary_site" "$replication_type"
    
    # Setup replica database
    setup_replica_database "$replica_site" "$primary_site" "$replication_type"
    
    # Verify replication status
    verify_replication_status "$primary_site" "$replica_site"
}

configure_primary_database() {
    local site="$1"
    local replication_type="$2"
    
    # PostgreSQL replication configuration
    cat > "/tmp/postgresql_primary_$site.conf" <<EOF
# Replication settings
wal_level = replica
max_wal_senders = 10
max_replication_slots = 10
synchronous_commit = ${replication_type}
archive_mode = on
archive_command = 'aws s3 cp %p s3://db-wal-archive/${site}/%f'
EOF
    
    # Apply configuration
    ssh "admin@${site}-db.company.com" "sudo cp /tmp/postgresql_primary_$site.conf /etc/postgresql/14/main/conf.d/replication.conf"
    ssh "admin@${site}-db.company.com" "sudo systemctl reload postgresql"
}

# File synchronization
setup_file_synchronization() {
    local source_site="$1"
    local target_site="$2"
    
    echo "Setting up file synchronization: $source_site → $target_site"
    
    # Setup rsync with ssh keys
    setup_ssh_keys "$source_site" "$target_site"
    
    # Create sync script
    cat > "/tmp/file_sync_${source_site}_${target_site}.sh" <<EOF
#!/bin/bash
# Automated file synchronization script

RSYNC_OPTIONS="-avz --delete --progress"
SOURCE_PATH="/opt/applications/"
TARGET_HOST="${target_site}-app.company.com"
TARGET_PATH="/opt/applications/"
LOG_FILE="/var/log/file_sync_${target_site}.log"

# Perform synchronization
rsync \$RSYNC_OPTIONS \\
    --exclude '*.log' \\
    --exclude '*.tmp' \\
    --exclude 'cache/' \\
    \$SOURCE_PATH \\
    admin@\$TARGET_HOST:\$TARGET_PATH \\
    >> \$LOG_FILE 2>&1

# Log completion
echo "\$(date): File sync completed to $target_site" >> \$LOG_FILE
EOF
    
    # Deploy and schedule sync script
    scp "/tmp/file_sync_${source_site}_${target_site}.sh" "admin@${source_site}-app.company.com:/usr/local/bin/"
    ssh "admin@${source_site}-app.company.com" "chmod +x /usr/local/bin/file_sync_${source_site}_${target_site}.sh"
    
    # Add to crontab for regular sync
    ssh "admin@${source_site}-app.company.com" "echo '*/15 * * * * /usr/local/bin/file_sync_${source_site}_${target_site}.sh' | crontab -"
}

# Comprehensive DR testing
run_dr_test() {
    local test_type="$1"  # planned, unplanned, partial
    local target_site="$2"
    
    echo "🧪 Starting DR test: $test_type on site $target_site"
    
    local test_id="dr_test_$(date +%Y%m%d_%H%M%S)"
    
    # Create test report
    cat > "/tmp/dr_test_$test_id.log" <<EOF
Disaster Recovery Test Report
=============================
Test ID: $test_id
Test Type: $test_type
Target Site: $target_site
Start Time: $(date)

EOF
    
    case "$test_type" in
        "planned")
            run_planned_dr_test "$target_site" "$test_id"
            ;;
        "unplanned")
            run_unplanned_dr_test "$target_site" "$test_id"
            ;;
        "partial")
            run_partial_dr_test "$target_site" "$test_id"
            ;;
        *)
            echo "Unknown test type: $test_type"
            return 1
            ;;
    esac
    
    # Generate final report
    echo "End Time: $(date)" >> "/tmp/dr_test_$test_id.log"
    echo "DR test completed. Report: /tmp/dr_test_$test_id.log"
}

run_planned_dr_test() {
    local target_site="$1"
    local test_id="$2"
    
    echo "Running planned DR test..." | tee -a "/tmp/dr_test_$test_id.log"
    
    # 1. Verify backup integrity
    echo "1. Verifying backup integrity..." | tee -a "/tmp/dr_test_$test_id.log"
    verify_backup_integrity "$target_site" >> "/tmp/dr_test_$test_id.log"
    
    # 2. Test database restore
    echo "2. Testing database restore..." | tee -a "/tmp/dr_test_$test_id.log"
    test_database_restore "$target_site" >> "/tmp/dr_test_$test_id.log"
    
    # 3. Test application deployment
    echo "3. Testing application deployment..." | tee -a "/tmp/dr_test_$test_id.log"
    test_application_deployment "$target_site" >> "/tmp/dr_test_$test_id.log"
    
    # 4. Verify end-to-end functionality
    echo "4. Verifying end-to-end functionality..." | tee -a "/tmp/dr_test_$test_id.log"
    test_end_to_end_functionality "$target_site" >> "/tmp/dr_test_$test_id.log"
    
    echo "✅ Planned DR test completed successfully" | tee -a "/tmp/dr_test_$test_id.log"
}

# Recovery Time Objective (RTO) measurement
measure_rto() {
    local scenario="$1"
    local target_site="$2"
    
    echo "📊 Measuring RTO for scenario: $scenario"
    
    local start_time=$(date +%s)
    
    # Simulate failure and recovery based on scenario
    case "$scenario" in
        "database_failure")
            simulate_database_failure_recovery "$target_site"
            ;;
        "site_failure")
            simulate_site_failure_recovery "$target_site"
            ;;
        "application_failure")
            simulate_application_failure_recovery "$target_site"
            ;;
    esac
    
    local end_time=$(date +%s)
    local rto_seconds=$((end_time - start_time))
    local rto_minutes=$((rto_seconds / 60))
    
    echo "RTO Measurement Results:"
    echo "Scenario: $scenario"
    echo "Recovery Time: ${rto_minutes} minutes (${rto_seconds} seconds)"
    
    # Compare against target RTO
    local target_rto=15  # 15 minutes target
    if [[ $rto_minutes -le $target_rto ]]; then
        echo "✅ RTO target met (≤${target_rto} minutes)"
    else
        echo "❌ RTO target exceeded (>${target_rto} minutes)"
    fi
}

# Business continuity validation
validate_business_continuity() {
    local recovery_site="$1"
    
    echo "🔍 Validating business continuity on $recovery_site"
    
    # Test critical business functions
    local tests=(
        "user_authentication"
        "data_access"
        "transaction_processing"
        "reporting_functionality"
        "integration_apis"
    )
    
    local passed_tests=0
    local total_tests=${#tests[@]}
    
    for test in "${tests[@]}"; do
        echo "Testing: $test"
        if run_business_function_test "$test" "$recovery_site"; then
            echo "  ✅ $test: PASSED"
            ((passed_tests++))
        else
            echo "  ❌ $test: FAILED"
        fi
    done
    
    local success_rate=$((passed_tests * 100 / total_tests))
    echo "Business Continuity Validation Results:"
    echo "Passed: $passed_tests/$total_tests tests ($success_rate%)"
    
    if [[ $success_rate -ge 95 ]]; then
        echo "✅ Business continuity validation PASSED"
        return 0
    else
        echo "❌ Business continuity validation FAILED"
        return 1
    fi
}

# Main DR orchestration
main() {
    case "${1:-help}" in
        "monitor")
            # Continuous monitoring mode
            while true; do
                for site in "${!SITES[@]}"; do
                    if ! check_site_health "$site"; then
                        echo "🚨 Site $site failed health check!"
                        # Determine failover target
                        for target_site in "${!SITES[@]}"; do
                            if [[ "$target_site" != "$site" ]] && check_site_health "$target_site"; then
                                initiate_failover "$site" "$target_site"
                                break
                            fi
                        done
                    fi
                done
                sleep 60  # Check every minute
            done
            ;;
        "setup")
            echo "Setting up multi-site disaster recovery..."
            # Setup replication between all sites
            for primary in "${!SITES[@]}"; do
                for replica in "${!SITES[@]}"; do
                    if [[ "$primary" != "$replica" ]]; then
                        setup_database_replication "$primary" "$replica"
                        setup_file_synchronization "$primary" "$replica"
                    fi
                done
            done
            ;;
        "test")
            local test_type="${2:-planned}"
            local target_site="${3:-secondary}"
            run_dr_test "$test_type" "$target_site"
            ;;
        "measure-rto")
            local scenario="${2:-site_failure}"
            local target_site="${3:-secondary}"
            measure_rto "$scenario" "$target_site"
            ;;
        "validate")
            local recovery_site="${2:-secondary}"
            validate_business_continuity "$recovery_site"
            ;;
        *)
            echo "Usage: $0 {monitor|setup|test|measure-rto|validate}"
            echo "  monitor - Start continuous site monitoring"
            echo "  setup - Configure multi-site replication"
            echo "  test [type] [site] - Run DR test (planned/unplanned/partial)"
            echo "  measure-rto [scenario] [site] - Measure recovery time"
            echo "  validate [site] - Validate business continuity"
            exit 1
            ;;
    esac
}

# Execute if run directly
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
    main "$@"
fi

# Comprehensive compliance monitoring configuration
apiVersion: v1
kind: ConfigMap
metadata:
  name: compliance-framework
  namespace: monitoring
data:
  compliance-config.yaml: |
    compliance_frameworks:
      - name: SOC2_Type2
        version: "2017"
        controls:
          - CC1.1: "COSO Principle 1 - Control Environment"
          - CC2.1: "COSO Principle 4 - Risk Assessment"
          - CC3.1: "COSO Principle 10 - Control Activities"
          - A1.1: "Availability - Performance Monitoring"
          - A1.2: "Availability - Capacity Planning"
        
      - name: ISO27001
        version: "2013"
        controls:
          - A.12.3.1: "Information backup"
          - A.17.1.2: "Implementing information security continuity"
          - A.17.1.3: "Verify, review and evaluate information security continuity"
        
      - name: GDPR
        version: "2018"
        controls:
          - Article_32: "Security of processing"
          - Article_33: "Notification of personal data breach"
          - Article_35: "Data protection impact assessment"
    
    monitoring_rules:
      backup_compliance:
        - rule: "All Tier 1 systems must have backups within 4 hours"
          query: "time() - backup_last_success_timestamp{tier=\"1\"} < 14400"
          severity: "critical"
        
        - rule: "Backup encryption must be enabled for all sensitive data"
          query: "backup_encryption_enabled{data_classification=\"sensitive\"} == 1"
          severity: "critical"
        
        - rule: "Cross-region backup replication required for Tier 1/2"
          query: "backup_cross_region_count{tier=~\"1|2\"} >= 2"
          severity: "high"
      
      recovery_compliance:
        - rule: "RTO must meet tier requirements"
          query: "recovery_time_actual_minutes <= recovery_time_target_minutes"
          severity: "high"
        
        - rule: "DR testing must be performed quarterly"
          query: "time() - dr_test_last_timestamp < 7776000"  # 90 days
          severity: "medium"
    
    audit_requirements:
      retention_periods:
        backup_logs: "7_years"
        access_logs: "1_year"
        security_events: "3_years"
        compliance_reports: "10_years"
      
      encryption_standards:
        data_at_rest: "AES-256"
        data_in_transit: "TLS-1.3"
        backup_encryption: "AES-256-GCM"
      
      access_controls:
        backup_administrators: "2_factor_auth_required"
        dr_procedures: "segregation_of_duties"
        audit_logs: "readonly_access_only"