#!/usr/bin/env python
#coding=utf8

import logging
import socket
from sjrpc.server import SimpleSslRpcServer
from handlers import WelcomeHandler
from conf import CCConf
from client import CCClient

class CCServer(object):
    '''
    CloudControl server main class.

    :param conf_dir: the directory that store the client configuration
    :param certfile: the path to the ssl certificate
    :param keyfile: the path to the ssl key
    :param address: the interface to bind
    :param port: the port to bind
    '''

    LISTEN_BACKLOG = 5

    def __init__(self, conf_dir, certfile=None, keyfile=None,
                 address='0.0.0.0', port=1984):

        # Dict containing all connected accounts, the key is the login of
        # the account and the value the :class:`RpcConnection` of the peer:
        self._connected = {}

        # The interface object to the configuration directory:
        self.conf = CCConf(conf_dir)

        # Create the server socket
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        sock.bind((address, port))
        sock.listen(CCServer.LISTEN_BACKLOG)

        if certfile:
            logging.info('SSL Certificate: %s' % certfile)
        if keyfile:
            logging.info('SSL Key: %s' % certfile)

        logging.info('Started to listen on %s port %s' % (address, port))
        
        # Create the connection manager:
        self.manager = SimpleSslRpcServer(sock, certfile=certfile,
                                          keyfile=keyfile,
                                          default_handler=WelcomeHandler(self))

    def iterrole(self, role):
        '''
        Generator to iter on each connected client with specified role.

        :param role: role to filter
        '''

        for login, client in self._connected.iteritems():
            if client.connection.get_handler().__class__.role_name == role:
                yield client

    def register(self, login, role, connection):
        '''
        Register a new connected account on the server.

        :param login: login of the account
        :param connection: connection to register
        :param tags: tags to add for the client
        '''
        
        self._connected[login] = CCClient(login, role, self, connection)

    def search_client_by_connection(self, connection):
        '''
        Search a connected client by it connection. If no client is found,
        return None.

        :param connection: the connection of the client to search
        :return: the found client or None
        '''

        for client in self._connected.values():
            if client.connection is connection:
                return client
        else:
            return None

    def run(self):
        '''
        Run the server mainloop.
        '''

        logging.info('Running manager mainloop')
        self.manager.run()