from .connection import HTTPConnection
from .connection_pool import ConnectionPool
from .http11 import HTTP11Connection
from .http_proxy import HTTPProxy
from .interfaces import ConnectionInterface

try:
    from .http2 import HTTP2Connection
except ImportError:  # pragma: nocover

    class HTTP2Connection:  # type: ignore
        def __init__(self, *args, **kwargs) -> None:  # type: ignore
            raise RuntimeError(
                "Attempted to use http2 support, but the `h2` package is not "
                "installed. Use 'pip install httpcore[http2]'."
            )


try:
    from .socks_proxy import SOCKSProxy
except ImportError:  # pragma: nocover

    class SOCKSProxy:  # type: ignore
        def __init__(self, *args, **kwargs) -> None:  # type: ignore
            raise RuntimeError(
                "Attempted to use SOCKS support, but the `socksio` package is not "
                "installed. Use 'pip install httpcore[socks]'."
            )


__all__ = [
    "HTTPConnection",
    "ConnectionPool",
    "HTTPProxy",
    "HTTP11Connection",
    "HTTP2Connection",
    "ConnectionInterface",
    "SOCKSProxy",
]