saml2

def verify_authentication(credentials: Dict[str, str]) -> bool:
    """Verify the authentication by calling GetCallerIdentity using temporary credentials."""
    try:
        # Create a session using temporary SSO credentials
        session = boto3.Session(
            aws_access_key_id=credentials['AccessKeyId'],
            aws_secret_access_key=credentials['SecretAccessKey'],
            aws_session_token=credentials['SessionToken']
        )
        sts_client = session.client('sts')
        
        # Call to confirm if the token is valid
        identity = sts_client.get_caller_identity()
        print(f"Authenticated as: {identity['Arn']}")
        return True
    except Exception as e:
        print(f"Failed to verify authentication: {str(e)}")
        return False

def main():
    parser = argparse.ArgumentParser(description='AWS SAML Authentication and Role Switching Tool')
    parser.add_argument('--env', nargs='+', choices=['np', 'preprod', 'prod'],
                        required=True, help='Service environments to authenticate (e.g., np preprod)')
    parser.add_argument('--csv', required=True,
                        help='Path to CSV file containing account mappings')
    parser.add_argument('--username', '-u', help='Username (optional, defaults to $USER)')
    parser.add_argument('--quiet', '-q', action='store_true', help='Minimize output')
    parser.add_argument('--mfa-token', help='MFA Token (optional)')
    
    args = parser.parse_args()
    
    print("CDNXHG HIS AWS CLI Access Tool")
    print("===========================\n")
    
    # Map environment arguments to target environments
    selected_envs = {ENV_CONFIGS[env]['environment'] for env in args.env}
    
    # Load and filter CSV content based on selected environments
    print("\nLoading and validating CSV content...")
    account_mappings = load_and_filter_csv(args.csv, selected_envs)
    
    # Get username and prompt for password
    username = args.username or os.environ.get('USER') or input("Enter username: ")
    password = getpass.getpass("Password: ")
    mfa_token = args.mfa_token or input("MFA Token (Optional): [Press enter to skip] ")
    
    # Authenticate and process each environment
    for env_code in args.env:
        env_config = ENV_CONFIGS[env_code]
        env_name = env_config['environment']
        print(f"\nAuthenticating to {env_config['account_name']} for environment '{env_name}'")
        
        # Initial authentication
        session, response = get_session(env_config['account_name'], env_config['account_id'], args.quiet)
        saml_response = authenticate(session, username, password, mfa_token, args.quiet)
        
        # Parse the SAML response to obtain temporary credentials (assume these are obtained from `authenticate`)
        credentials = {
            'AccessKeyId': 'temporary_access_key',
            'SecretAccessKey': 'temporary_secret_key',
            'SessionToken': 'temporary_session_token'
        }  # Replace with actual parsing of SAML response

        # Verify authentication using the temporary credentials
        if not verify_authentication(credentials):
            sys.exit("Authentication verification failed. Please check your credentials and try again.")
        
        # Write verified service account credentials to the AWS credentials file
        write_credentials(env_config['account_name'], credentials)
        print(f"Service account credentials for {env_config['account_name']} saved successfully.")
        
        print(f"\nSwitching roles for environment '{env_name}'")
        for account in account_mappings.get(env_name, []):
            try:
                print(f"\nSwitching to role in account: {account['account_name']} ({account['account_id']})")
                
                credentials = switch_role(
                    source_profile=env_config['account_name'],
                    target_role_arn=account['switch_role_arn'],
                    session_name=f"{username}-session",
                    env_config=env_config  # Pass env_config for re-authentication if needed
                )

                write_credentials(account['account_name'], credentials)
                
                print(f"Successfully switched to role in {account['account_name']}")
                print(f"To use these credentials: export AWS_PROFILE={account['account_name']}")
                print(f"Credentials expire: {credentials['Expiration']}")
                
            except Exception as e:
                print(f"Error switching to account {account['account_name']}: {str(e)}")
                print("Continuing with next account...")
                continue