import pexpect
import argparse
import os
import tempfile

def backup_wlc(ip, username, password,filename):
    print(f"Backing up WLC {ip}")
    print(f"Logging in with {username} and {password}")
    child = pexpect.spawn(f"ssh -oHostKeyAlgorithms=+ssh-ed25519 {username}@{ip}")
    child.expect("password:")
    child.sendline(password)
    child.expect("#")
    prompt = child.before.lstrip().decode("utf-8") + "#"
    prompt = prompt.replace("(","\(")
    prompt = prompt.replace(")","\)")
    prompt = prompt.replace("*","\*")
    prompt = prompt.replace("[","\[")
    prompt = prompt.replace("]","\]")
    child.sendline("no paging")
    child.expect(prompt)
    child.sendline("show running")
    child.expect(prompt)
    #print(child.before)
    running_config=child.before.decode("utf-8")
    running_config = running_config.replace("\r\n","\n")
    
    # Write to a temporary file
    with tempfile.NamedTemporaryFile(delete=False, mode="w", 
                        encoding="utf-8",dir=os.path.dirname(filename)) as temp_file:
        temp_file.write(running_config)
        temp_file_path = temp_file.name

    # Rename the temporary file to the desired output file
    try:
        os.rename(temp_file_path, filename)
        print(f"Backup saved to {filename}")
    except Exception as e:
        print(f"Failed to save backup: {e}")
        os.remove(temp_file_path)  # Clean up the temporary file

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="backup aruba wlc")
    parser.add_argument("--username", help="Username for login", required=True)
    parser.add_argument("--password", help="Password for login", required=True)
    parser.add_argument("--ip", help="IP address of WLC", required=True)
    parser.add_argument("--filename", help="filename to save file", required=True)

    args = parser.parse_args()

    backup_wlc(args.ip, args.username, args.password,args.filename)