aioice

import asyncio
import aioice
import os

async def connect_using_ice():
    # In a real application, STUN/TURN servers should be provided.
    # For testing, you might use public STUN servers or set up your own.
    stun_server = os.environ.get('AIOICE_STUN_SERVER', 'stun.l.google.com:19302')
    
    connection = aioice.Connection(ice_controlling=True, stun_server=(stun_server.split(':')[0], int(stun_server.split(':')[1])))
    
    # Gather local candidates
    await connection.gather_candidates()
    
    # In a real application, 'send_local_info' and 'get_remote_info'
    # would be replaced by your signaling mechanism (e.g., WebSockets).
    # For this example, we'll simulate an exchange.
    
    # These would be exchanged with the remote peer via signaling
    local_candidates_sdp = [c.to_sdp() for c in connection.local_candidates]
    local_username = connection.local_username
    local_password = connection.local_password
    
    print(f"Local candidates: {local_candidates_sdp}")
    print(f"Local username: {local_username}")
    print(f"Local password: {local_password}")
    
    # --- Simulate remote information reception (replace with actual signaling) ---
    # For a full example, you'd receive this from another peer.
    # Let's assume remote_candidates, remote_username, remote_password are obtained.
    remote_candidates = [] # Populate with remote Candidate objects or SDP strings
    remote_username = "remote_user" # Example
    remote_password = "remote_pass" # Example
    # --- End simulation ---

    # Add remote candidates
    for candidate_sdp in remote_candidates:
        await connection.add_remote_candidate(aioice.Candidate.from_sdp(candidate_sdp))
    await connection.add_remote_candidate(None) # Signal end-of-candidates

    connection.remote_username = remote_username
    connection.remote_password = remote_password
    
    print("Performing ICE handshake...")
    try:
        await connection.connect()
        print(f"ICE connection established: {connection.state}")

        # Send and receive data on component 1
        await connection.sendto(b'Hello from aioice!', 1)
        print("Sent 'Hello from aioice!'")
        
        # In a real app, you would continuously listen for data
        data, component = await connection.recvfrom()
        print(f"Received '{data.decode()}' on component {component}")

    except Exception as e:
        print(f"ICE connection failed: {e}")
    finally:
        await connection.close()
        print("Connection closed.")

# To run this, you'd typically have two peers exchanging information via a signaling channel.
# For a local test, one would act as controlling, the other as controlled, and manually
# exchange the candidate, username, and password strings.
# asyncio.run(connect_using_ice())
print("Quickstart example demonstrates aioice usage. For a full connection, actual signaling is required.")