# -*- coding: utf-8 -*-
'''
Return data to a mongodb server

Required python modules: pymongo


This returner will send data from the minions to a MongoDB server. To
configure the settings for your MongoDB server, add the following lines
to the minion config files::

    mongo.db: <database name>
    mongo.host: <server ip address>
    mongo.user: <MongoDB username>
    mongo.password: <MongoDB user password>
    mongo.port: 27017

  To use the mongo returner, append '--return mongo' to the salt command. ex:

    salt '*' test.ping --return mongo
'''

# Import python libs
import logging

# import Salt libs
import salt.utils

# Import third party libs
try:
    import pymongo
    HAS_PYMONGO = True
except ImportError:
    HAS_PYMONGO = False


log = logging.getLogger(__name__)


def __virtual__():
    if not HAS_PYMONGO:
        return False
    return 'mongo_return'


def _remove_dots(src):
    '''
    Remove dots from the given data structure
    '''
    output = {}
    for key, val in src.iteritems():
        if isinstance(val, dict):
            val = _remove_dots(val)
        output[key.replace('.', '-')] = val
    return output


def _get_conn():
    '''
    Return a mongodb connection object
    '''
    if 'config.option' in __salt__:
        host = __salt__['config.option']('mongo.host')
        port = __salt__['config.option']('mongo.port')
        db_ = __salt__['config.option']('mongo.db')
        user = __salt__['config.option']('mongo.user')
        password = __salt__['config.option']('mongo.password')
    else:
        cfg = __opts__
        host = cfg.get('mongo.host', None)
        port = cfg.get('mongo.port', None)
        db_ = cfg.get('mongo.db', None)
        user = cfg.get('mongo.user', None)
        password = cfg.get('mongo.password', None)

    conn = pymongo.Connection(host, port)
    mdb = conn[db_]

    if user and password:
        mdb.authenticate(user, password)
    return conn, mdb


def returner(ret):
    '''
    Return data to a mongodb server
    '''
    _, mdb = _get_conn()
    col = mdb[ret['id']]

    if isinstance(ret['return'], dict):
        back = _remove_dots(ret['return'])
    else:
        back = ret['return']

    log.debug(back)
    sdata = {ret['jid']: back, 'fun': ret['fun']}
    if 'out' in ret:
        sdata['out'] = ret['out']
    col.insert(sdata)


def get_jid(jid):
    '''
    Return the return information associated with a jid
    '''
    _, mdb = _get_conn()
    ret = {}
    for collection in mdb.collection_names():
        rdata = mdb[collection].find_one({jid: {'$exists': 'true'}})
        if rdata:
            ret[collection] = rdata
    return ret


def get_fun(fun):
    '''
    Return the most recent jobs that have executed the named function
    '''
    _, mdb = _get_conn()
    ret = {}
    for collection in mdb.collection_names():
        rdata = mdb[collection].find_one({'fun': fun})
        if rdata:
            ret[collection] = rdata
    return ret


def prep_jid(nocache):  # pylint: disable=unused-argument
    '''
    Pre-process the jid and return the jid to use
    '''
    return salt.utils.gen_jid()
