# -*- coding: utf-8 -*-
# copyright 2019 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr -- mailto:contact@logilab.fr
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

from rdflib import Namespace, ConjunctiveGraph, plugin
import rdflib_jsonld  # noqa

plugin.register("jsonld", plugin.Serializer, "rdflib_jsonld.serializer", "JsonLDSerializer")

RDF_MIMETYPE_TO_FORMAT = {
    'application/rdf+xml': 'xml',
    'text/turtle': 'turtle',
    'text/n3': 'n3',
    'application/n-quads': 'nquads',
    'application/n-triples': 'nt',
    'application/trig': 'trig',
    'application/ld+json': 'json-ld',
}

namespaces = {
    "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
    "schema": "http://schema.org/",
}

NS_VARS = {ns: Namespace(uri) for ns, uri in namespaces.items()}


# dict: name of CWEType -> list of regid of adapters derived from EntityRDFAdapter
ETYPES_ADAPTERS = {
}


def conjunctive_graph():
    """factory to build a ``ConjunctiveGraph`` and bind all namespaces
    """
    graph = ConjunctiveGraph()
    for vocab, rdfns in NS_VARS.items():
        graph.bind(vocab, rdfns)
    return graph


def iter_rdf_adapters(entity):
    for adapter_id in ETYPES_ADAPTERS.get(entity.__regid__, ()):
        adapter = entity.cw_adapt_to(adapter_id)
        if adapter:
            yield adapter


def add_entity_to_graph(graph, entity):
    for adapter in iter_rdf_adapters(entity):
        for triple in adapter.triples():
            graph.add(triple)