import argparse
import logging

import multiaddr
import trio

from libp2p import (
    new_host,
)
from libp2p.host.ping import (
    ID as PING_PROTOCOL_ID,
    PING_LENGTH,
    RESP_TIMEOUT,
    PingService,
)
from libp2p.network.stream.net_stream import (
    INetStream,
)
from libp2p.peer.peerinfo import (
    info_from_p2p_addr,
)

# Configure minimal logging
logging.basicConfig(level=logging.WARNING)
logging.getLogger("multiaddr").setLevel(logging.WARNING)
logging.getLogger("libp2p").setLevel(logging.WARNING)


PSK = "dffb7e3135399a8b1612b2aaca1c36a3a8ac2cd0cca51ceeb2ced87d308cac6d"


async def send_ping(stream: INetStream) -> None:
    try:
        payload = b"\x01" * PING_LENGTH
        print(f"sending ping to {stream.muxed_conn.peer_id}")

        await stream.write(payload)

        with trio.fail_after(RESP_TIMEOUT):
            response = await stream.read(PING_LENGTH)

        if response == payload:
            print(f"received pong from {stream.muxed_conn.peer_id}")

    except Exception as e:
        print(f"error occurred : {e}")


async def run(port: int, destination: str, psk: int, transport: str) -> None:
    from libp2p.utils.address_validation import (
        find_free_port,
        get_available_interfaces,
        get_optimal_binding_address,
    )

    if port <= 0:
        port = find_free_port()

    if transport == "tcp":
        listen_addrs = get_available_interfaces(port)
    if transport == "ws":
        listen_addrs = [multiaddr.Multiaddr(f"/ip4/127.0.0.1/tcp/{port}/ws")]

    if psk == 1:
        host = new_host(listen_addrs=listen_addrs, psk=PSK)
    else:
        host = new_host(listen_addrs=listen_addrs)

    async with host.run(listen_addrs=listen_addrs), trio.open_nursery() as nursery:
        # Start the peer-store cleanup task
        nursery.start_soon(host.get_peerstore().start_cleanup_task, 60)

        if not destination:
            ping_service = PingService(host)
            host.set_stream_handler(PING_PROTOCOL_ID, ping_service.handle_ping)

            # Get all available addresses with peer ID
            all_addrs = host.get_addrs()
            transport_addrs = host.get_transport_addrs()

            print("Listener ready, listening on:\n")
            for addr in all_addrs:
                print(f"{addr}")

            print("\nRaw transport addresses (without peer ID):")
            for addr in transport_addrs:
                print(f"{addr}")

            print(
                "\nRun this from the same folder in another console:\n\n"
                f"ping-demo -d {get_optimal_binding_address(port)}"
                f" -psk {psk} -t {transport}\n"
            )
            print("Waiting for incoming connection...")

        else:
            maddr = multiaddr.Multiaddr(destination)
            info = info_from_p2p_addr(maddr)
            await host.connect(info)
            stream = await host.new_stream(info.peer_id, [PING_PROTOCOL_ID])

            nursery.start_soon(send_ping, stream)

            return

        await trio.sleep_forever()


def main() -> None:
    description = """
    This program demonstrates a simple p2p ping application using libp2p.
    To use it, first run 'python ping.py -p <PORT>', where <PORT> is the port number.
    Then, run another instance with 'python ping.py -p <ANOTHER_PORT> -d <DESTINATION>',
    where <DESTINATION> is the multiaddress of the previous listener host.
    """

    example_maddr = (
        "/ip4/[HOST_IP]/tcp/8000/p2p/QmQn4SwGkDZKkUEpBRBvTmheQycxAHJUNmVEnjA2v1qe8Q"
    )

    parser = argparse.ArgumentParser(description=description)
    parser.add_argument("-p", "--port", default=0, type=int, help="source port number")

    parser.add_argument(
        "-d",
        "--destination",
        type=str,
        help=f"destination multiaddr string, e.g. {example_maddr}",
    )

    parser.add_argument(
        "-psk", "--psk", default=0, type=int, help="Enable PSK in the transport layer"
    )

    parser.add_argument(
        "-t",
        "--transport",
        default="tcp",
        type=str,
        help="Choose the transport layer for ping TCP/WS",
    )

    args = parser.parse_args()

    try:
        trio.run(run, *(args.port, args.destination, args.psk, args.transport))
    except KeyboardInterrupt:
        pass


if __name__ == "__main__":
    main()