import socket

# Configuration
TCP_IP = '127.0.0.1'  # The server's IP address (localhost in this case)
TCP_PORT = 49152       # The port the server is listening on
BUFFER_SIZE = 1024    # The maximum amount of data to be received at once
MESSAGE = b"rppairing" # Data must be in bytes

try:
    # 1. Create a TCP/IP socket
    # socket.AF_INET specifies the IPv4 address family
    # socket.SOCK_STREAM specifies the TCP protocol (stream socket)
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        # 2. Connect the socket to the remote address and port
        s.connect((TCP_IP, TCP_PORT))
        print(f"Connecting to {TCP_IP} port {TCP_PORT}")

        # 3. Send data
        s.sendall(MESSAGE) # Use sendall() for reliable transmission of all data
        print(f"Sending: {MESSAGE!r}")

        # 4. Receive data
        data = s.recv(BUFFER_SIZE)
        print(f"Received data: {data!r}")

    # The socket is automatically closed when exiting the 'with' block

except ConnectionRefusedError:
    print(f"Connection failed. Ensure a server is running on {TCP_IP}:{TCP_PORT}")
except Exception as e:
    print(f"An error occurred: {e}")