#!/usr/bin/env python3
"""
Enterprise SMB/CIFS Management and Automation Framework
"""

import subprocess
import json
import yaml
import logging
import time
import threading
import os
import socket
import ldap3
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 configparser
import tempfile

class SMBVersion(Enum):
    SMB1 = "1.0"
    SMB2 = "2.0"
    SMB21 = "2.1"
    SMB3 = "3.0"
    SMB311 = "3.1.1"

class SecurityLevel(Enum):
    NONE = "none"
    NTLM = "ntlm"
    NTLMV2 = "ntlmv2"
    KERBEROS = "krb5"
    KERBEROS_INTEGRITY = "krb5i"

class MountOptions(Enum):
    AUTO = "auto"
    NOAUTO = "noauto"
    USER = "user"
    NOUSER = "nouser"
    EXEC = "exec"
    NOEXEC = "noexec"

@dataclass
class SMBShare:
    name: str
    server: str
    share_path: str
    local_mount_point: str
    username: str
    password: str
    domain: str = ""
    security_level: SecurityLevel = SecurityLevel.NTLMV2
    smb_version: SMBVersion = SMBVersion.SMB3
    mount_options: List[MountOptions] = field(default_factory=list)
    uid: Optional[int] = None
    gid: Optional[int] = None
    file_mode: str = "0644"
    dir_mode: str = "0755"
    encryption_enabled: bool = True
    cache_mode: str = "strict"
    auto_mount: bool = True
    backup_enabled: bool = False

@dataclass
class ActiveDirectoryConfig:
    domain: str
    server: str
    bind_dn: str
    bind_password: str
    search_base: str
    user_search_filter: str = "(sAMAccountName={})"
    group_search_filter: str = "(cn={})"
    ssl_enabled: bool = True
    port: int = 636

@dataclass
class SambaConfig:
    workgroup: str
    realm: str
    security: str = "ads"
    winbind_use_default_domain: bool = True
    winbind_offline_logon: bool = False
    template_homedir: str = "/home/%D/%U"
    template_shell: str = "/bin/bash"
    idmap_config: Dict[str, str] = field(default_factory=dict)

class EnterpriseSMBFramework:
    def __init__(self, config_file: str = "smb_config.yaml"):
        self.config = self._load_config(config_file)
        self.shares = {}
        self.active_connections = {}
        self.credentials_store = {}
        self.ad_config = None
        self.samba_config = None
        
        # Initialize logging
        logging.basicConfig(
            level=logging.INFO,
            format='%(asctime)s - %(levelname)s - %(message)s',
            handlers=[
                logging.FileHandler('/var/log/smb_framework.log'),
                logging.StreamHandler()
            ]
        )
        self.logger = logging.getLogger(__name__)
        
        # Initialize system components
        self._initialize_system_components()
        
    def _load_config(self, config_file: str) -> Dict:
        """Load SMB 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 SMB configuration"""
        return {
            'smb_client': {
                'default_version': 'SMB3',
                'security_level': 'ntlmv2',
                'encryption_enabled': True,
                'cache_mode': 'strict',
                'timeout': 30
            },
            'active_directory': {
                'enabled': True,
                'domain': 'corp.company.com',
                'server': 'dc01.corp.company.com',
                'ssl_enabled': True
            },
            'samba': {
                'workgroup': 'CORP',
                'realm': 'CORP.COMPANY.COM',
                'security': 'ads',
                'winbind_enabled': True
            },
            'monitoring': {
                'enabled': True,
                'metrics_port': 9200,
                'health_check_interval': 60
            },
            'security': {
                'credentials_encryption': True,
                'kerberos_enabled': True,
                'certificate_validation': True
            }
        }
    
    def _initialize_system_components(self):
        """Initialize system-level SMB components"""
        # Install required packages
        self._install_required_packages()
        
        # Configure Samba client
        self._configure_samba_client()
        
        # Setup Kerberos if enabled
        if self.config.get('security', {}).get('kerberos_enabled', False):
            self._configure_kerberos()
    
    def _install_required_packages(self):
        """Install required SMB/CIFS packages"""
        packages = [
            'cifs-utils',
            'samba-common',
            'samba-common-bin',
            'samba-dsdb-modules',
            'winbind',
            'krb5-user',
            'krb5-config',
            'libpam-winbind',
            'libnss-winbind',
            'libpam-krb5'
        ]
        
        self.logger.info("Installing required packages...")
        for package in packages:
            try:
                subprocess.run(['apt-get', 'install', '-y', package], 
                             check=True, capture_output=True)
                self.logger.info(f"Installed package: {package}")
            except subprocess.CalledProcessError as e:
                self.logger.warning(f"Failed to install {package}: {e}")
    
    def register_smb_share(self, share: SMBShare):
        """Register a new SMB share"""
        self.shares[share.name] = share
        self.logger.info(f"Registered SMB share: {share.name}")
        
        # Store credentials securely
        self._store_credentials(share)
        
        # Create mount point
        self._create_mount_point(share.local_mount_point)
        
        # Configure auto-mount if enabled
        if share.auto_mount:
            self._configure_auto_mount(share)
    
    def _store_credentials(self, share: SMBShare):
        """Store SMB credentials securely"""
        credentials_file = f"/etc/samba/credentials/{share.name}"
        
        # Create credentials directory
        os.makedirs(os.path.dirname(credentials_file), exist_ok=True)
        
        # Write credentials file
        with open(credentials_file, 'w') as f:
            f.write(f"username={share.username}\n")
            f.write(f"password={share.password}\n")
            if share.domain:
                f.write(f"domain={share.domain}\n")
        
        # Set secure permissions
        os.chmod(credentials_file, 0o600)
        
        self.credentials_store[share.name] = credentials_file
        self.logger.info(f"Stored credentials for share: {share.name}")
    
    def _create_mount_point(self, mount_point: str):
        """Create mount point directory"""
        Path(mount_point).mkdir(parents=True, exist_ok=True)
        self.logger.info(f"Created mount point: {mount_point}")
    
    def _configure_auto_mount(self, share: SMBShare):
        """Configure automatic mounting at boot"""
        fstab_entry = self._generate_fstab_entry(share)
        
        # Read current fstab
        with open('/etc/fstab', 'r') as f:
            fstab_content = f.read()
        
        # Check if entry already exists
        if share.local_mount_point in fstab_content:
            self.logger.info(f"Fstab entry already exists for: {share.name}")
            return
        
        # Add entry to fstab
        with open('/etc/fstab', 'a') as f:
            f.write(f"\n# SMB Share: {share.name}\n")
            f.write(fstab_entry + "\n")
        
        self.logger.info(f"Added fstab entry for: {share.name}")
    
    def _generate_fstab_entry(self, share: SMBShare) -> str:
        """Generate fstab entry for SMB share"""
        # Build UNC path
        unc_path = f"//{share.server}/{share.share_path}"
        
        # Build mount options
        options = []
        options.append(f"credentials={self.credentials_store[share.name]}")
        options.append(f"vers={share.smb_version.value}")
        options.append(f"sec={share.security_level.value}")
        options.append(f"cache={share.cache_mode}")
        options.append(f"file_mode={share.file_mode}")
        options.append(f"dir_mode={share.dir_mode}")
        
        if share.uid is not None:
            options.append(f"uid={share.uid}")
        if share.gid is not None:
            options.append(f"gid={share.gid}")
        
        if share.encryption_enabled:
            options.append("seal")
        
        # Add mount options
        for option in share.mount_options:
            options.append(option.value)
        
        options_str = ",".join(options)
        
        return f"{unc_path} {share.local_mount_point} cifs {options_str} 0 0"
    
    def mount_share(self, share_name: str) -> bool:
        """Mount SMB share manually"""
        if share_name not in self.shares:
            raise ValueError(f"Share not found: {share_name}")
        
        share = self.shares[share_name]
        
        # Check if already mounted
        if self._is_mounted(share.local_mount_point):
            self.logger.info(f"Share already mounted: {share_name}")
            return True
        
        # Build mount command
        mount_cmd = self._build_mount_command(share)
        
        try:
            result = subprocess.run(mount_cmd, check=True, capture_output=True, text=True)
            self.logger.info(f"Successfully mounted share: {share_name}")
            
            # Track active connection
            self.active_connections[share_name] = {
                'mounted_at': time.time(),
                'mount_point': share.local_mount_point,
                'server': share.server
            }
            
            return True
            
        except subprocess.CalledProcessError as e:
            self.logger.error(f"Failed to mount share {share_name}: {e.stderr}")
            return False
    
    def _build_mount_command(self, share: SMBShare) -> List[str]:
        """Build mount command for SMB share"""
        unc_path = f"//{share.server}/{share.share_path}"
        
        cmd = ['mount', '-t', 'cifs', unc_path, share.local_mount_point]
        
        # Build options
        options = []
        options.append(f"credentials={self.credentials_store[share.name]}")
        options.append(f"vers={share.smb_version.value}")
        options.append(f"sec={share.security_level.value}")
        options.append(f"cache={share.cache_mode}")
        options.append(f"file_mode={share.file_mode}")
        options.append(f"dir_mode={share.dir_mode}")
        
        if share.uid is not None:
            options.append(f"uid={share.uid}")
        if share.gid is not None:
            options.append(f"gid={share.gid}")
        
        if share.encryption_enabled:
            options.append("seal")
        
        cmd.extend(['-o', ','.join(options)])
        
        return cmd
    
    def unmount_share(self, share_name: str) -> bool:
        """Unmount SMB share"""
        if share_name not in self.shares:
            raise ValueError(f"Share not found: {share_name}")
        
        share = self.shares[share_name]
        
        if not self._is_mounted(share.local_mount_point):
            self.logger.info(f"Share not mounted: {share_name}")
            return True
        
        try:
            subprocess.run(['umount', share.local_mount_point], check=True)
            self.logger.info(f"Successfully unmounted share: {share_name}")
            
            # Remove from active connections
            if share_name in self.active_connections:
                del self.active_connections[share_name]
            
            return True
            
        except subprocess.CalledProcessError as e:
            self.logger.error(f"Failed to unmount share {share_name}: {e}")
            return False
    
    def _is_mounted(self, mount_point: str) -> bool:
        """Check if mount point is currently mounted"""
        try:
            result = subprocess.run(['mountpoint', '-q', mount_point], 
                                  capture_output=True)
            return result.returncode == 0
        except:
            return False
    
    def configure_active_directory_integration(self, ad_config: ActiveDirectoryConfig):
        """Configure Active Directory integration"""
        self.ad_config = ad_config
        
        # Configure Samba for AD
        self._configure_samba_for_ad()
        
        # Configure Kerberos for AD
        self._configure_kerberos_for_ad()
        
        # Configure NSS and PAM
        self._configure_nss_pam_for_ad()
        
        # Join domain
        self._join_active_directory_domain()
        
        self.logger.info("Active Directory integration configured")
    
    def _configure_samba_for_ad(self):
        """Configure Samba for Active Directory"""
        samba_config = f"""
[global]
    security = ads
    workgroup = {self.ad_config.domain.split('.')[0].upper()}
    realm = {self.ad_config.domain.upper()}
    
    # Winbind configuration
    winbind use default domain = yes
    winbind offline logon = false
    winbind nss info = rfc2307
    winbind enum users = yes
    winbind enum groups = yes
    winbind refresh tickets = yes
    
    # ID mapping
    idmap config * : backend = tdb
    idmap config * : range = 3000-7999
    idmap config {self.ad_config.domain.split('.')[0].upper()} : backend = rid
    idmap config {self.ad_config.domain.split('.')[0].upper()} : range = 10000-999999
    
    # Authentication
    template homedir = /home/%D/%U
    template shell = /bin/bash
    
    # Logging
    log file = /var/log/samba/log.%m
    max log size = 1000
    log level = 2
    
    # Performance
    socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=131072 SO_SNDBUF=131072
    
    # Security
    client signing = mandatory
    server signing = mandatory
    client schannel = yes
    server schannel = yes
"""
        
        with open('/etc/samba/smb.conf', 'w') as f:
            f.write(samba_config)
        
        self.logger.info("Samba configured for Active Directory")
    
    def _configure_kerberos_for_ad(self):
        """Configure Kerberos for Active Directory"""
        krb5_config = f"""
[libdefaults]
    default_realm = {self.ad_config.domain.upper()}
    dns_lookup_realm = false
    dns_lookup_kdc = true
    ticket_lifetime = 24h
    renew_lifetime = 7d
    forwardable = true
    rdns = false
    default_ccache_name = KEYRING:persistent:%{{uid}}

[realms]
    {self.ad_config.domain.upper()} = {{
        kdc = {self.ad_config.server}
        admin_server = {self.ad_config.server}
        default_domain = {self.ad_config.domain.lower()}
    }}

[domain_realm]
    .{self.ad_config.domain.lower()} = {self.ad_config.domain.upper()}
    {self.ad_config.domain.lower()} = {self.ad_config.domain.upper()}
"""
        
        with open('/etc/krb5.conf', 'w') as f:
            f.write(krb5_config)
        
        self.logger.info("Kerberos configured for Active Directory")
    
    def _configure_nss_pam_for_ad(self):
        """Configure NSS and PAM for Active Directory"""
        # Configure NSS
        nss_config = """
passwd:         files winbind
group:          files winbind
shadow:         files winbind
"""
        
        with open('/etc/nsswitch.conf', 'w') as f:
            f.write(nss_config)
        
        # Configure PAM (simplified example)
        pam_config = """
auth        sufficient    pam_winbind.so
auth        required      pam_unix.so     try_first_pass nullok
auth        optional      pam_permit.so
auth        required      pam_env.so

account     sufficient    pam_winbind.so
account     required      pam_unix.so
account     optional      pam_permit.so
account     required      pam_time.so

password    sufficient    pam_winbind.so
password    required      pam_unix.so     try_first_pass nullok sha512 shadow
password    optional      pam_permit.so

session     required      pam_limits.so
session     required      pam_unix.so
session     optional      pam_winbind.so
session     optional      pam_permit.so
"""
        
        with open('/etc/pam.d/common-auth', 'w') as f:
            f.write(pam_config)
        
        self.logger.info("NSS and PAM configured for Active Directory")
    
    def _join_active_directory_domain(self):
        """Join the system to Active Directory domain"""
        try:
            # Stop services
            subprocess.run(['systemctl', 'stop', 'winbind'], check=True)
            subprocess.run(['systemctl', 'stop', 'smbd'], check=True)
            subprocess.run(['systemctl', 'stop', 'nmbd'], check=True)
            
            # Join domain
            join_cmd = [
                'net', 'ads', 'join', 
                f'-U{self.ad_config.bind_dn}%{self.ad_config.bind_password}',
                f'-S{self.ad_config.server}'
            ]
            
            result = subprocess.run(join_cmd, check=True, capture_output=True, text=True)
            self.logger.info("Successfully joined Active Directory domain")
            
            # Start services
            subprocess.run(['systemctl', 'start', 'winbind'], check=True)
            subprocess.run(['systemctl', 'start', 'smbd'], check=True)
            subprocess.run(['systemctl', 'start', 'nmbd'], check=True)
            
            # Enable services
            subprocess.run(['systemctl', 'enable', 'winbind'], check=True)
            subprocess.run(['systemctl', 'enable', 'smbd'], check=True)
            subprocess.run(['systemctl', 'enable', 'nmbd'], check=True)
            
        except subprocess.CalledProcessError as e:
            self.logger.error(f"Failed to join Active Directory domain: {e}")
            raise
    
    def test_smb_connectivity(self, share_name: str) -> Dict[str, Any]:
        """Test SMB connectivity and performance"""
        if share_name not in self.shares:
            raise ValueError(f"Share not found: {share_name}")
        
        share = self.shares[share_name]
        test_results = {
            'share_name': share_name,
            'server': share.server,
            'timestamp': time.time(),
            'tests': {}
        }
        
        # Test 1: Network connectivity
        test_results['tests']['network_connectivity'] = self._test_network_connectivity(share.server)
        
        # Test 2: SMB service availability
        test_results['tests']['smb_service'] = self._test_smb_service(share.server)
        
        # Test 3: Authentication
        test_results['tests']['authentication'] = self._test_smb_authentication(share)
        
        # Test 4: Mount test
        test_results['tests']['mount_test'] = self._test_mount_functionality(share)
        
        # Test 5: Performance test
        if test_results['tests']['mount_test']['success']:
            test_results['tests']['performance'] = self._test_smb_performance(share)
        
        return test_results
    
    def _test_network_connectivity(self, server: str) -> Dict[str, Any]:
        """Test network connectivity to SMB server"""
        try:
            # Test ping
            ping_result = subprocess.run(['ping', '-c', '3', server], 
                                       capture_output=True, text=True)
            
            if ping_result.returncode == 0:
                # Extract latency
                output_lines = ping_result.stdout.split('\n')
                for line in output_lines:
                    if 'avg' in line:
                        avg_latency = float(line.split('/')[-2])
                        break
                else:
                    avg_latency = 0
                
                return {
                    'success': True,
                    'latency_ms': avg_latency,
                    'message': 'Network connectivity successful'
                }
            else:
                return {
                    'success': False,
                    'error': ping_result.stderr,
                    'message': 'Network connectivity failed'
                }
        except Exception as e:
            return {
                'success': False,
                'error': str(e),
                'message': 'Network connectivity test failed'
            }
    
    def _test_smb_service(self, server: str) -> Dict[str, Any]:
        """Test SMB service availability"""
        try:
            # Test SMB ports
            smb_ports = [139, 445]
            results = {}
            
            for port in smb_ports:
                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                sock.settimeout(5)
                result = sock.connect_ex((server, port))
                sock.close()
                
                results[f'port_{port}'] = result == 0
            
            success = any(results.values())
            
            return {
                'success': success,
                'ports': results,
                'message': 'SMB service available' if success else 'SMB service unavailable'
            }
            
        except Exception as e:
            return {
                'success': False,
                'error': str(e),
                'message': 'SMB service test failed'
            }
    
    def _test_smb_authentication(self, share: SMBShare) -> Dict[str, Any]:
        """Test SMB authentication"""
        try:
            # Use smbclient to test authentication
            smbclient_cmd = [
                'smbclient', f'//{share.server}/{share.share_path}',
                '-U', f'{share.username}%{share.password}',
                '-c', 'ls'
            ]
            
            if share.domain:
                smbclient_cmd.extend(['-W', share.domain])
            
            result = subprocess.run(smbclient_cmd, capture_output=True, text=True)
            
            if result.returncode == 0:
                return {
                    'success': True,
                    'message': 'Authentication successful'
                }
            else:
                return {
                    'success': False,
                    'error': result.stderr,
                    'message': 'Authentication failed'
                }
                
        except Exception as e:
            return {
                'success': False,
                'error': str(e),
                'message': 'Authentication test failed'
            }
    
    def _test_mount_functionality(self, share: SMBShare) -> Dict[str, Any]:
        """Test mount functionality"""
        try:
            # Create temporary mount point
            temp_mount = tempfile.mkdtemp(prefix='smb_test_')
            
            try:
                # Build mount command
                mount_cmd = self._build_mount_command(share)
                mount_cmd[2] = temp_mount  # Use temporary mount point
                
                # Mount
                result = subprocess.run(mount_cmd, capture_output=True, text=True)
                
                if result.returncode == 0:
                    # Test file operations
                    test_file = os.path.join(temp_mount, 'test_file.txt')
                    try:
                        with open(test_file, 'w') as f:
                            f.write('SMB test file')
                        
                        with open(test_file, 'r') as f:
                            content = f.read()
                        
                        os.remove(test_file)
                        
                        # Unmount
                        subprocess.run(['umount', temp_mount], check=True)
                        
                        return {
                            'success': True,
                            'file_operations': True,
                            'message': 'Mount test successful'
                        }
                    except Exception as e:
                        subprocess.run(['umount', temp_mount], capture_output=True)
                        return {
                            'success': True,
                            'file_operations': False,
                            'error': str(e),
                            'message': 'Mount successful but file operations failed'
                        }
                else:
                    return {
                        'success': False,
                        'error': result.stderr,
                        'message': 'Mount failed'
                    }
                    
            finally:
                # Cleanup
                os.rmdir(temp_mount)
                
        except Exception as e:
            return {
                'success': False,
                'error': str(e),
                'message': 'Mount test failed'
            }
    
    def _test_smb_performance(self, share: SMBShare) -> Dict[str, Any]:
        """Test SMB performance"""
        try:
            if not self._is_mounted(share.local_mount_point):
                return {
                    'success': False,
                    'message': 'Share not mounted for performance test'
                }
            
            # Create test file
            test_file = os.path.join(share.local_mount_point, 'perf_test.dat')
            test_size = 10 * 1024 * 1024  # 10MB
            
            # Write test
            start_time = time.time()
            with open(test_file, 'wb') as f:
                f.write(b'0' * test_size)
            write_time = time.time() - start_time
            
            # Read test
            start_time = time.time()
            with open(test_file, 'rb') as f:
                data = f.read()
            read_time = time.time() - start_time
            
            # Cleanup
            os.remove(test_file)
            
            # Calculate throughput
            write_throughput = test_size / write_time / 1024 / 1024  # MB/s
            read_throughput = test_size / read_time / 1024 / 1024    # MB/s
            
            return {
                'success': True,
                'write_throughput_mbps': round(write_throughput, 2),
                'read_throughput_mbps': round(read_throughput, 2),
                'write_time_seconds': round(write_time, 2),
                'read_time_seconds': round(read_time, 2),
                'message': 'Performance test completed'
            }
            
        except Exception as e:
            return {
                'success': False,
                'error': str(e),
                'message': 'Performance test failed'
            }
    
    def monitor_smb_connections(self) -> Dict[str, Any]:
        """Monitor all SMB connections"""
        monitoring_data = {
            'timestamp': time.time(),
            'total_shares': len(self.shares),
            'active_connections': len(self.active_connections),
            'shares_status': {},
            'system_metrics': {}
        }
        
        # Check each share status
        for share_name, share in self.shares.items():
            is_mounted = self._is_mounted(share.local_mount_point)
            monitoring_data['shares_status'][share_name] = {
                'mounted': is_mounted,
                'mount_point': share.local_mount_point,
                'server': share.server,
                'last_check': time.time()
            }
            
            if is_mounted and share_name in self.active_connections:
                uptime = time.time() - self.active_connections[share_name]['mounted_at']
                monitoring_data['shares_status'][share_name]['uptime_seconds'] = uptime
        
        # System metrics
        monitoring_data['system_metrics'] = self._get_system_metrics()
        
        return monitoring_data
    
    def _get_system_metrics(self) -> Dict[str, Any]:
        """Get system metrics related to SMB"""
        metrics = {}
        
        try:
            # Check SMB processes
            smb_processes = subprocess.run(['pgrep', '-f', 'smb'], 
                                         capture_output=True, text=True)
            metrics['smb_processes'] = len(smb_processes.stdout.strip().split('\n')) if smb_processes.stdout.strip() else 0
            
            # Check winbind status
            winbind_status = subprocess.run(['systemctl', 'is-active', 'winbind'], 
                                          capture_output=True, text=True)
            metrics['winbind_active'] = winbind_status.stdout.strip() == 'active'
            
            # Check network connections
            netstat_result = subprocess.run(['netstat', '-an'], 
                                          capture_output=True, text=True)
            smb_connections = len([line for line in netstat_result.stdout.split('\n') 
                                 if ':445' in line and 'ESTABLISHED' in line])
            metrics['smb_network_connections'] = smb_connections
            
        except Exception as e:
            self.logger.error(f"Error getting system metrics: {e}")
            metrics['error'] = str(e)
        
        return metrics
    
    def generate_comprehensive_report(self) -> Dict[str, Any]:
        """Generate comprehensive SMB status report"""
        report = {
            'timestamp': time.time(),
            'summary': {
                'total_shares': len(self.shares),
                'mounted_shares': 0,
                'failed_shares': 0,
                'health_status': 'healthy'
            },
            'shares': {},
            'active_directory': {
                'enabled': self.ad_config is not None,
                'domain_joined': False
            },
            'system_status': {},
            'recommendations': []
        }
        
        # Test each share
        for share_name in self.shares:
            try:
                test_results = self.test_smb_connectivity(share_name)
                report['shares'][share_name] = test_results
                
                # Update summary
                if test_results['tests']['mount_test']['success']:
                    report['summary']['mounted_shares'] += 1
                else:
                    report['summary']['failed_shares'] += 1
                    
            except Exception as e:
                report['shares'][share_name] = {
                    'error': str(e),
                    'tests': {}
                }
                report['summary']['failed_shares'] += 1
        
        # Check AD status
        if self.ad_config:
            report['active_directory']['domain_joined'] = self._check_domain_joined()
        
        # System status
        report['system_status'] = self._get_system_metrics()
        
        # Generate recommendations
        report['recommendations'] = self._generate_recommendations(report)
        
        # Overall health
        if report['summary']['failed_shares'] == 0:
            report['summary']['health_status'] = 'healthy'
        elif report['summary']['failed_shares'] < report['summary']['total_shares'] / 2:
            report['summary']['health_status'] = 'warning'
        else:
            report['summary']['health_status'] = 'critical'
        
        return report
    
    def _check_domain_joined(self) -> bool:
        """Check if system is joined to AD domain"""
        try:
            result = subprocess.run(['wbinfo', '-t'], capture_output=True, text=True)
            return result.returncode == 0
        except:
            return False
    
    def _generate_recommendations(self, report: Dict[str, Any]) -> List[str]:
        """Generate recommendations based on report"""
        recommendations = []
        
        # Check for failed shares
        if report['summary']['failed_shares'] > 0:
            recommendations.append("Investigate failed SMB shares and resolve connectivity issues")
        
        # Check AD status
        if report['active_directory']['enabled'] and not report['active_directory']['domain_joined']:
            recommendations.append("Active Directory integration is enabled but domain join failed")
        
        # Check system status
        if not report['system_status'].get('winbind_active', False):
            recommendations.append("Winbind service is not active - AD authentication may not work")
        
        # Performance recommendations
        for share_name, share_data in report['shares'].items():
            if 'tests' in share_data and 'performance' in share_data['tests']:
                perf = share_data['tests']['performance']
                if perf['success']:
                    if perf['write_throughput_mbps'] < 10:
                        recommendations.append(f"Poor write performance on {share_name} - consider SMB optimization")
                    if perf['read_throughput_mbps'] < 10:
                        recommendations.append(f"Poor read performance on {share_name} - consider SMB optimization")
        
        return recommendations

def main():
    """Main execution function"""
    # Initialize SMB framework
    smb_framework = EnterpriseSMBFramework()
    
    # Register SMB shares
    print("Registering SMB shares...")
    
    # Production file share
    production_share = SMBShare(
        name="production_files",
        server="fileserver01.corp.company.com",
        share_path="Production",
        local_mount_point="/mnt/production",
        username="service_account",
        password="secure_password",
        domain="corp.company.com",
        security_level=SecurityLevel.KERBEROS,
        smb_version=SMBVersion.SMB311,
        encryption_enabled=True,
        uid=1000,
        gid=1000,
        auto_mount=True
    )
    smb_framework.register_smb_share(production_share)
    
    # User home directories
    home_share = SMBShare(
        name="user_homes",
        server="fileserver02.corp.company.com",
        share_path="Users",
        local_mount_point="/mnt/users",
        username="domain_user",
        password="user_password",
        domain="corp.company.com",
        security_level=SecurityLevel.NTLMV2,
        smb_version=SMBVersion.SMB3,
        encryption_enabled=True,
        auto_mount=True
    )
    smb_framework.register_smb_share(home_share)
    
    # Configure Active Directory integration
    print("Configuring Active Directory integration...")
    ad_config = ActiveDirectoryConfig(
        domain="corp.company.com",
        server="dc01.corp.company.com",
        bind_dn="CN=SMB Service,OU=Service Accounts,DC=corp,DC=company,DC=com",
        bind_password="ad_service_password",
        search_base="DC=corp,DC=company,DC=com"
    )
    smb_framework.configure_active_directory_integration(ad_config)
    
    # Test connectivity
    print("Testing SMB connectivity...")
    for share_name in smb_framework.shares:
        test_results = smb_framework.test_smb_connectivity(share_name)
        print(f"\nShare: {share_name}")
        print(f"Network: {'✅' if test_results['tests']['network_connectivity']['success'] else '❌'}")
        print(f"SMB Service: {'✅' if test_results['tests']['smb_service']['success'] else '❌'}")
        print(f"Authentication: {'✅' if test_results['tests']['authentication']['success'] else '❌'}")
        print(f"Mount Test: {'✅' if test_results['tests']['mount_test']['success'] else '❌'}")
        
        if 'performance' in test_results['tests']:
            perf = test_results['tests']['performance']
            if perf['success']:
                print(f"Write Speed: {perf['write_throughput_mbps']} MB/s")
                print(f"Read Speed: {perf['read_throughput_mbps']} MB/s")
    
    # Generate comprehensive report
    print("\nGenerating comprehensive report...")
    report = smb_framework.generate_comprehensive_report()
    
    print(f"\nSMB Framework Status Report")
    print("=" * 40)
    print(f"Total Shares: {report['summary']['total_shares']}")
    print(f"Mounted Shares: {report['summary']['mounted_shares']}")
    print(f"Failed Shares: {report['summary']['failed_shares']}")
    print(f"Health Status: {report['summary']['health_status'].upper()}")
    print(f"AD Integration: {'✅' if report['active_directory']['enabled'] else '❌'}")
    
    if report['recommendations']:
        print(f"\nRecommendations:")
        for i, rec in enumerate(report['recommendations'], 1):
            print(f"{i}. {rec}")
    
    print("\nSMB Framework initialized successfully!")
    print("All shares configured for automatic mounting at boot.")

if __name__ == "__main__":
    main()

#!/bin/bash
# Enterprise SMB Performance Optimization and Monitoring Script

set -euo pipefail

# Performance tuning parameters
declare -A SMB_TUNING=(
    ["socket_options"]="TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=131072 SO_SNDBUF=131072"
    ["read_size"]="65536"
    ["write_size"]="65536"
    ["max_xmit"]="65536"
    ["dead_time"]="30"
    ["keepalive"]="300"
    ["max_connections"]="1000"
)

# Optimize SMB client performance
optimize_smb_client() {
    echo "🚀 Optimizing SMB client performance..."
    
    # Kernel parameters
    echo "Setting kernel parameters..."
    cat >> /etc/sysctl.conf <<EOF
# SMB/CIFS Performance Optimization
net.core.rmem_default = 262144
net.core.rmem_max = 16777216
net.core.wmem_default = 262144
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 65536 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_sack = 1
net.core.netdev_max_backlog = 30000
net.ipv4.tcp_no_metrics_save = 1
net.core.somaxconn = 65536
EOF
    
    # Apply kernel parameters
    sysctl -p
    
    # Optimize mount options
    echo "Optimizing mount options..."
    cat > /etc/cifs_mount_options.conf <<EOF
# Enterprise SMB Mount Options
rsize=65536
wsize=65536
cache=strict
vers=3.0
sec=ntlmv2
seal
actimeo=30
EOF
    
    echo "✅ SMB client optimization completed"
}

# Monitor SMB performance
monitor_smb_performance() {
    local share_path="$1"
    local duration="${2:-300}"  # 5 minutes default
    
    echo "📊 Monitoring SMB performance for $share_path (${duration}s)..."
    
    # Create performance log
    local log_file="/var/log/smb_performance_$(date +%Y%m%d_%H%M%S).log"
    
    cat > "$log_file" <<EOF
SMB Performance Monitoring Report
================================
Share Path: $share_path
Duration: ${duration} seconds
Start Time: $(date)

EOF
    
    # Start background monitoring
    local monitor_pid
    (
        while true; do
            echo "$(date): $(iostat -x 1 1 | grep -E 'Device|$(basename "$share_path")')" >> "$log_file"
            echo "$(date): $(sar -n DEV 1 1 | grep -E 'IFACE|$(ip route get 8.8.8.8 | grep -oP 'dev \K\w+')')" >> "$log_file"
            sleep 30
        done
    ) &
    monitor_pid=$!
    
    # Performance tests
    run_performance_tests "$share_path" "$log_file"
    
    # Stop monitoring
    kill $monitor_pid 2>/dev/null
    
    echo "End Time: $(date)" >> "$log_file"
    echo "📊 Performance monitoring completed: $log_file"
}

# Run comprehensive performance tests
run_performance_tests() {
    local share_path="$1"
    local log_file="$2"
    
    echo "Running performance tests..." | tee -a "$log_file"
    
    # Test 1: Sequential write performance
    echo "Test 1: Sequential Write Performance" | tee -a "$log_file"
    local write_start=$(date +%s.%N)
    dd if=/dev/zero of="$share_path/test_write.dat" bs=1M count=100 2>&1 | tee -a "$log_file"
    local write_end=$(date +%s.%N)
    local write_time=$(echo "$write_end - $write_start" | bc)
    local write_speed=$(echo "scale=2; 100 / $write_time" | bc)
    echo "Write Speed: ${write_speed} MB/s" | tee -a "$log_file"
    
    # Test 2: Sequential read performance
    echo "Test 2: Sequential Read Performance" | tee -a "$log_file"
    local read_start=$(date +%s.%N)
    dd if="$share_path/test_write.dat" of=/dev/null bs=1M 2>&1 | tee -a "$log_file"
    local read_end=$(date +%s.%N)
    local read_time=$(echo "$read_end - $read_start" | bc)
    local read_speed=$(echo "scale=2; 100 / $read_time" | bc)
    echo "Read Speed: ${read_speed} MB/s" | tee -a "$log_file"
    
    # Test 3: Random I/O performance
    echo "Test 3: Random I/O Performance" | tee -a "$log_file"
    fio --name=random_rw --ioengine=libaio --rw=randrw --rwmixread=70 \
        --bs=4k --direct=1 --size=100M --numjobs=4 --runtime=60 \
        --group_reporting --filename="$share_path/test_random.dat" \
        --output-format=json --output="$share_path/fio_results.json" 2>&1 | tee -a "$log_file"
    
    # Test 4: Small file operations
    echo "Test 4: Small File Operations" | tee -a "$log_file"
    local small_file_start=$(date +%s.%N)
    mkdir -p "$share_path/small_files_test"
    for i in {1..1000}; do
        echo "test data $i" > "$share_path/small_files_test/file_$i.txt"
    done
    local small_file_end=$(date +%s.%N)
    local small_file_time=$(echo "$small_file_end - $small_file_start" | bc)
    echo "Small file creation time: ${small_file_time}s (1000 files)" | tee -a "$log_file"
    
    # Cleanup
    rm -f "$share_path/test_write.dat" "$share_path/test_random.dat"
    rm -rf "$share_path/small_files_test"
    
    echo "Performance tests completed" | tee -a "$log_file"
}

# SMB security audit
audit_smb_security() {
    echo "🔒 Conducting SMB security audit..."
    
    local audit_report="/var/log/smb_security_audit_$(date +%Y%m%d_%H%M%S).log"
    
    cat > "$audit_report" <<EOF
SMB Security Audit Report
========================
Date: $(date)
System: $(hostname)

EOF
    
    # Check SMB protocol versions
    echo "SMB Protocol Versions:" | tee -a "$audit_report"
    smbclient -L localhost -N 2>&1 | grep -E "protocol|version" | tee -a "$audit_report"
    
    # Check for SMB1 (should be disabled)
    echo -e "\nSMB1 Status:" | tee -a "$audit_report"
    if grep -q "min protocol = SMB2" /etc/samba/smb.conf; then
        echo "✅ SMB1 disabled" | tee -a "$audit_report"
    else
        echo "❌ SMB1 may be enabled - security risk!" | tee -a "$audit_report"
    fi
    
    # Check encryption settings
    echo -e "\nEncryption Settings:" | tee -a "$audit_report"
    grep -E "(encrypt|seal)" /etc/samba/smb.conf | tee -a "$audit_report"
    
    # Check authentication methods
    echo -e "\nAuthentication Methods:" | tee -a "$audit_report"
    grep -E "(security|auth)" /etc/samba/smb.conf | tee -a "$audit_report"
    
    # Check file permissions
    echo -e "\nCredentials File Permissions:" | tee -a "$audit_report"
    find /etc/samba -name "*credentials*" -ls 2>/dev/null | tee -a "$audit_report"
    
    # Check for anonymous access
    echo -e "\nAnonymous Access Check:" | tee -a "$audit_report"
    smbclient -L localhost -N 2>&1 | grep -i "anonymous" | tee -a "$audit_report"
    
    # Check firewall rules
    echo -e "\nFirewall Rules:" | tee -a "$audit_report"
    iptables -L | grep -E "(445|139|netbios)" | tee -a "$audit_report"
    
    echo "🔒 Security audit completed: $audit_report"
}

# Troubleshoot SMB issues
troubleshoot_smb() {
    local share_path="$1"
    local server="$2"
    
    echo "🔧 Troubleshooting SMB connection to $server..."
    
    local troubleshoot_log="/var/log/smb_troubleshoot_$(date +%Y%m%d_%H%M%S).log"
    
    cat > "$troubleshoot_log" <<EOF
SMB Troubleshooting Report
=========================
Date: $(date)
Server: $server
Share Path: $share_path

EOF
    
    # Test 1: Network connectivity
    echo "Test 1: Network Connectivity" | tee -a "$troubleshoot_log"
    if ping -c 3 "$server" > /dev/null 2>&1; then
        echo "✅ Network connectivity OK" | tee -a "$troubleshoot_log"
    else
        echo "❌ Network connectivity failed" | tee -a "$troubleshoot_log"
    fi
    
    # Test 2: SMB ports
    echo -e "\nTest 2: SMB Port Connectivity" | tee -a "$troubleshoot_log"
    for port in 139 445; do
        if nc -z "$server" "$port" 2>/dev/null; then
            echo "✅ Port $port is open" | tee -a "$troubleshoot_log"
        else
            echo "❌ Port $port is closed" | tee -a "$troubleshoot_log"
        fi
    done
    
    # Test 3: DNS resolution
    echo -e "\nTest 3: DNS Resolution" | tee -a "$troubleshoot_log"
    if nslookup "$server" > /dev/null 2>&1; then
        echo "✅ DNS resolution OK" | tee -a "$troubleshoot_log"
        echo "IP Address: $(nslookup "$server" | grep -A1 "Name:" | grep "Address:" | cut -d' ' -f2)" | tee -a "$troubleshoot_log"
    else
        echo "❌ DNS resolution failed" | tee -a "$troubleshoot_log"
    fi
    
    # Test 4: SMB negotiation
    echo -e "\nTest 4: SMB Negotiation" | tee -a "$troubleshoot_log"
    smbclient -L "$server" -N 2>&1 | head -20 | tee -a "$troubleshoot_log"
    
    # Test 5: Authentication
    echo -e "\nTest 5: Authentication Test" | tee -a "$troubleshoot_log"
    echo "Testing with null session..." | tee -a "$troubleshoot_log"
    smbclient -L "$server" -N 2>&1 | grep -E "(Session|NT_STATUS)" | tee -a "$troubleshoot_log"
    
    # Test 6: Mount status
    echo -e "\nTest 6: Current Mount Status" | tee -a "$troubleshoot_log"
    if mountpoint -q "$share_path" 2>/dev/null; then
        echo "✅ Share is currently mounted" | tee -a "$troubleshoot_log"
        mount | grep "$share_path" | tee -a "$troubleshoot_log"
    else
        echo "❌ Share is not mounted" | tee -a "$troubleshoot_log"
    fi
    
    # Test 7: System logs
    echo -e "\nTest 7: Recent System Logs" | tee -a "$troubleshoot_log"
    journalctl -u smbd -u nmbd -u winbind --since "1 hour ago" | tail -20 | tee -a "$troubleshoot_log"
    
    echo "🔧 Troubleshooting completed: $troubleshoot_log"
}

# Main execution
main() {
    case "${1:-help}" in
        "optimize")
            optimize_smb_client
            ;;
        "monitor")
            local share_path="${2:-/mnt/share}"
            local duration="${3:-300}"
            monitor_smb_performance "$share_path" "$duration"
            ;;
        "audit")
            audit_smb_security
            ;;
        "troubleshoot")
            local share_path="${2:-/mnt/share}"
            local server="${3:-fileserver.company.com}"
            troubleshoot_smb "$share_path" "$server"
            ;;
        "test")
            local share_path="${2:-/mnt/share}"
            if [[ -d "$share_path" ]]; then
                run_performance_tests "$share_path" "/tmp/test_results.log"
            else
                echo "Error: Share path $share_path does not exist"
                exit 1
            fi
            ;;
        *)
            echo "Usage: $0 {optimize|monitor|audit|troubleshoot|test}"
            echo "  optimize - Optimize SMB client performance"
            echo "  monitor [path] [duration] - Monitor SMB performance"
            echo "  audit - Conduct security audit"
            echo "  troubleshoot [path] [server] - Troubleshoot SMB issues"
            echo "  test [path] - Run performance tests"
            exit 1
            ;;
    esac
}

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

# Kubernetes SMB/CIFS High Availability Configuration
apiVersion: apps/v1
kind: Deployment
metadata:
  name: smb-client-controller
  namespace: storage
spec:
  replicas: 3
  selector:
    matchLabels:
      app: smb-client-controller
  template:
    metadata:
      labels:
        app: smb-client-controller
    spec:
      containers:
      - name: smb-controller
        image: enterprise/smb-controller:latest
        ports:
        - containerPort: 8080
        env:
        - name: SMB_SERVERS
          value: "smb01.company.com,smb02.company.com,smb03.company.com"
        - name: FAILOVER_ENABLED
          value: "true"
        - name: HEALTH_CHECK_INTERVAL
          value: "30"
        volumeMounts:
        - name: smb-config
          mountPath: /etc/smb-config
        - name: credentials
          mountPath: /etc/smb-credentials
          readOnly: true
        resources:
          requests:
            memory: "256Mi"
            cpu: "250m"
          limits:
            memory: "512Mi"
            cpu: "500m"
        livenessProbe:
          httpGet:
            path: /health
            port: 8080
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /ready
            port: 8080
          initialDelaySeconds: 5
          periodSeconds: 5
      volumes:
      - name: smb-config
        configMap:
          name: smb-config
      - name: credentials
        secret:
          name: smb-credentials
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: smb-config
  namespace: storage
data:
  smb-shares.yaml: |
    shares:
      - name: production-data
        servers:
          - primary: smb01.company.com
            secondary: smb02.company.com
            tertiary: smb03.company.com
        share_path: Production
        mount_point: /mnt/production
        options:
          vers: "3.0"
          sec: "krb5"
          cache: "strict"
          seal: true
          resilient: true
        failover:
          enabled: true
          timeout: 30
          retry_count: 3
          
      - name: user-homes
        servers:
          - primary: smb02.company.com
            secondary: smb03.company.com
            tertiary: smb01.company.com
        share_path: Users
        mount_point: /mnt/users
        options:
          vers: "3.1.1"
          sec: "ntlmv2"
          cache: "loose"
          seal: true
        failover:
          enabled: true
          timeout: 30
          retry_count: 3
---
apiVersion: v1
kind: Secret
metadata:
  name: smb-credentials
  namespace: storage
type: Opaque
data:
  username: c2VydmljZV9hY2NvdW50  # service_account
  password: c2VjdXJlX3Bhc3N3b3Jk  # secure_password
  domain: Y29ycC5jb21wYW55LmNvbQ==  # corp.company.com
---
apiVersion: v1
kind: Service
metadata:
  name: smb-client-controller
  namespace: storage
spec:
  selector:
    app: smb-client-controller
  ports:
  - port: 8080
    targetPort: 8080
  type: ClusterIP
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: smb-client-controller
  namespace: storage
spec:
  selector:
    matchLabels:
      app: smb-client-controller
  endpoints:
  - port: http
    interval: 30s
    path: /metrics