# Copyright (c) 2012 netzguerilla.net <iro@netzguerilla.net>
# 
# This file is part of Iro.
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
# #Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
# PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from .dbdefer import dbdefer

from . import schema
from ..config import configParser
from ..offer import getProvider, Offer

@dbdefer
def extendProvider(session, user, typ, ps):
    """extend and reduce the offer list to allowed routes for **user**.

    - extend the "default" to the default offerlist of the **user**.
    - extend a Provider name to all routes of that provider.

    :param session: a valid session ( created by decorator :func:`iro.model.dbdefer.dbdefer`)
    :param `iro.model.schema.User` user: a user object
    :param string typ: typ of the message
    :param ps: a list of strings or a string, each one offer name or provider name
    :return: a extended an reduced offer list
    """
    user = session.merge(user)
    ret = []
    if ps == "default" or ps == ["default"]:
        ps = (q[0] for q in  user.routes(typ,default=True))
    for p in ps:
        if p not in ret and user.has_right(typ, offer_name = p): 
                ret.append(p)
        elif user.providers(typ).filter(schema.Offer.provider==p).first():
            for r in providers[p].typs[typ]:
                n = user.has_right(typ, provider=p, route=r)
                if n and n not in ret:
                    ret.append(n)
    return ret

@dbdefer
def loadOffers(session):
    """loading Offers from database and configuration file and store them in :attr:`~iro.model.offer.offers` and :attr:`~iro.model.offer.providers`.

    :param session: a valid session ( created by decorator :func:`iro.model.dbdefer.dbdefer`)
    """
    offers.clear()
    providers.clear()
    for provider in ( s for s in configParser.sections() if not s in ["main",]):
        p=getProvider(provider,configParser.get(provider,"typ"),configParser.items(provider))
        for t in p.typs:
            for r in p.typs[t]:
                n = schema.Offer.get(session, provider, r, t).name
                offers[n]=Offer(provider=p,route=r,typ=t,name=n)
        providers[provider]=p

offers={}
"""A dict of all available offers -- key is the offer name"""

providers={}
"""A dict of all available providers -- key is the provider name"""


configParser.registerReload(loadOffers)