import os
import socket
import errno
import warnings

from eventlet import greenio

def g_log(*args):
    warnings.warn("eventlet.util.g_log is deprecated because we're pretty sure no one uses it.  Send mail to eventletdev@lists.secondlife.com if you are actually using it.",
        DeprecationWarning, stacklevel=2)
    import sys
    from eventlet.support import greenlets as greenlet
    g_id = id(greenlet.getcurrent())
    if g_id is None:
        if greenlet.getcurrent().parent is None:
            ident = 'greenlet-main'
        else:
            g_id = id(greenlet.getcurrent())
            if g_id < 0:
                g_id += 1 + ((sys.maxint + 1) << 1)
            ident = '%08X' % (g_id,)
    else:
        ident = 'greenlet-%d' % (g_id,)
    print >>sys.stderr, '[%s] %s' % (ident, ' '.join(map(str, args)))


__original_socket__ = socket.socket
def tcp_socket():
    warnings.warn("eventlet.util.tcp_socket is deprecated."
        "Please use the standard socket technique for this instead:"
        "sock = socket.socket()",
        DeprecationWarning, stacklevel=2)
    s = __original_socket__(socket.AF_INET, socket.SOCK_STREAM)
    return s

try:
    # if ssl is available, use eventlet.green.ssl for our ssl implementation
    from eventlet.green import ssl
    def wrap_ssl(sock, certificate=None, private_key=None, server_side=False):
        return ssl.wrap_socket(sock,
            keyfile=private_key, certfile=certificate,
            server_side=server_side, cert_reqs=ssl.CERT_NONE,
            ssl_version=ssl.PROTOCOL_SSLv23, ca_certs=None,
            do_handshake_on_connect=True,
            suppress_ragged_eofs=True) 
except ImportError:
    # if ssl is not available, use PyOpenSSL
    def wrap_ssl(sock, certificate=None, private_key=None, server_side=False):
        try:
            from eventlet.green.OpenSSL import SSL
        except ImportError:
            raise ImportError("To use SSL with Eventlet, you must install PyOpenSSL or use Python 2.6 or later.")
        context = SSL.Context(SSL.SSLv23_METHOD)
        if certificate is not None:
            context.use_certificate_file(certificate)
        if private_key is not None:
            context.use_privatekey_file(private_key)
        context.set_verify(SSL.VERIFY_NONE, lambda *x: True)
    
        connection = SSL.Connection(context, sock)
        if server_side:
            connection.set_accept_state()
        else:
            connection.set_connect_state()
        return connection

def wrap_socket_with_coroutine_socket(use_thread_pool=None):
    warnings.warn("eventlet.util.wrap_socket_with_coroutine_socket() is now " 
        "eventlet.patcher.monkey_patch(all=False, socket=True)",
        DeprecationWarning, stacklevel=2)
    from eventlet import patcher
    patcher.monkey_patch(all=False, socket=True)
    

def wrap_pipes_with_coroutine_pipes():
    warnings.warn("eventlet.util.wrap_pipes_with_coroutine_pipes() is now " 
        "eventlet.patcher.monkey_patch(all=False, os=True)",
        DeprecationWarning, stacklevel=2)
    from eventlet import patcher
    patcher.monkey_patch(all=False, os=True)

def wrap_select_with_coroutine_select():
    warnings.warn("eventlet.util.wrap_select_with_coroutine_select() is now " 
        "eventlet.patcher.monkey_patch(all=False, select=True)",
        DeprecationWarning, stacklevel=2)
    from eventlet import patcher
    patcher.monkey_patch(all=False, select=True)

def wrap_threading_local_with_coro_local():
    """
    monkey patch ``threading.local`` with something that is greenlet aware.
    Since greenlets cannot cross threads, so this should be semantically
    identical to ``threadlocal.local``
    """
    warnings.warn("eventlet.util.wrap_threading_local_with_coro_local() is now " 
        "eventlet.patcher.monkey_patch(all=False, thread=True) -- though"
        "note that more than just _local is patched now.",
        DeprecationWarning, stacklevel=2)

    from eventlet import patcher
    patcher.monkey_patch(all=False, thread=True)


def socket_bind_and_listen(descriptor, addr=('', 0), backlog=50):
    warnings.warn("eventlet.util.socket_bind_and_listen is deprecated."
        "Please use the standard socket methodology for this instead:"
        "sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR, 1)"
        "sock.bind(addr)"
        "sock.listen(backlog)",
        DeprecationWarning, stacklevel=2)
    set_reuse_addr(descriptor)
    descriptor.bind(addr)
    descriptor.listen(backlog)
    return descriptor


def set_reuse_addr(descriptor):
    warnings.warn("eventlet.util.set_reuse_addr is deprecated."
        "Please use the standard socket methodology for this instead:"
        "sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR, 1)",
        DeprecationWarning, stacklevel=2)
    try:
        descriptor.setsockopt(
            socket.SOL_SOCKET,
            socket.SO_REUSEADDR,
            descriptor.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR) | 1)
    except socket.error:
        pass