# Copyright (C) 2009, Tutorius.org
# Copyright (C) 2009, Vincent Vinet <vince.vinet@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
"""
Universal Addressing Mechanism module

Allows addressing Events, signals, widgets, etc for supported platforms
"""

from urllib2 import urlparse

import gtkparser
import gobjectparser


SCHEME="tap" #Tutorius Adressing Protocol

__parsers = {
    gtkparser.SCHEME:gtkparser.parse_gtk,
    gobjectparser.SCHEME:gobjectparser.parse_gobject,
}

def __add_to_urlparse(name):
    #Add to uses_netloc
    if not name in urlparse.uses_netloc:
        urlparse.uses_netloc.append(name)
    
    #Add to uses_relative
    if not name in urlparse.uses_relative:
        urlparse.uses_relative.append(name)

#    #Add to uses_params
#    if not name in urlparse.uses_params:
#        urlparse.uses_params.append(name)

    #Add to uses_query
    if not name in urlparse.uses_query:
        urlparse.uses_query.append(name)

    #Add to uses_frament
    if not name in urlparse.uses_fragment:
        urlparse.uses_fragment.append(name)
    

#Add schemes to urlparse
__add_to_urlparse(SCHEME)

for subscheme in [".".join([SCHEME,s]) for s in __parsers]:
    __add_to_urlparse(subscheme)


class SchemeError(Exception):
    def __init__(self, message):
        Exception.__init__(self, message)
        self.message = message


def parse_uri(uri):
    res = urlparse.urlparse(uri)

    scheme = res.scheme.split(".")[0]
    subscheme = ".".join(res.scheme.split(".")[1:])
    if not scheme == SCHEME:
        raise SchemeError("Scheme %s not supported" % scheme)

    if subscheme != "" and not subscheme in __parsers:
        raise SchemeError("SubScheme %s not supported" % subscheme)

    if subscheme:
        return __parsers[subscheme](res)

    return res