#!/usr/bin/env python3
"""
Example demonstrating the identify/push protocol.

This example shows how to:
1. Set up a host with the identify/push protocol handler
2. Connect to another peer
3. Push identify information to the peer
4. Receive and process identify/push messages
"""

import logging

import trio

from libp2p import (
    new_host,
)
from libp2p.crypto.secp256k1 import (
    create_new_key_pair,
)
from libp2p.custom_types import (
    TProtocol,
)
from libp2p.identity.identify import (
    identify_handler_for,
)
from libp2p.identity.identify_push import (
    ID_PUSH,
    identify_push_handler_for,
    push_identify_to_peer,
)
from libp2p.peer.peerinfo import (
    info_from_p2p_addr,
)

# Configure logging
logging.basicConfig(
    level=logging.DEBUG,
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
)
logger = logging.getLogger(__name__)


async def main() -> None:
    # Create key pairs for the two hosts
    key_pair_1 = create_new_key_pair()
    key_pair_2 = create_new_key_pair()

    # Create the first host
    host_1 = new_host(key_pair=key_pair_1)

    # Set up the identify and identify/push handlers
    host_1.set_stream_handler(TProtocol("/ipfs/id/1.0.0"), identify_handler_for(host_1))
    host_1.set_stream_handler(ID_PUSH, identify_push_handler_for(host_1))

    # Create the second host
    host_2 = new_host(key_pair=key_pair_2)

    # Set up the identify and identify/push handlers
    host_2.set_stream_handler(TProtocol("/ipfs/id/1.0.0"), identify_handler_for(host_2))
    host_2.set_stream_handler(ID_PUSH, identify_push_handler_for(host_2))

    # Start listening on random ports using the run context manager
    import multiaddr

    listen_addr_1 = multiaddr.Multiaddr("/ip4/127.0.0.1/tcp/0")
    listen_addr_2 = multiaddr.Multiaddr("/ip4/127.0.0.1/tcp/0")

    async with host_1.run([listen_addr_1]), host_2.run([listen_addr_2]):
        # Get the addresses of both hosts
        addr_1 = host_1.get_addrs()[0]
        logger.info("Host 1 listening on %s", addr_1)

        addr_2 = host_2.get_addrs()[0]
        logger.info("Host 2 listening on %s", addr_2)

        # Connect host_2 to host_1
        peer_info = info_from_p2p_addr(addr_1)
        await host_2.connect(peer_info)
        logger.info("Host 2 connected to Host 1")

        # Wait a bit for the connection to establish
        await trio.sleep(1)

        # Push identify information from host_1 to host_2
        logger.info("Host 1 pushing identify information to Host 2")
        await push_identify_to_peer(host_1, host_2.get_id())

        # Wait a bit for the push to complete
        await trio.sleep(1)

        logger.info("Example completed successfully")


if __name__ == "__main__":
    trio.run(main)