# -*- coding: utf-8 -*-

#

# Copyright IRI (c) 2013

#

# contact@iri.centrepompidou.fr

#

# This software is governed by the CeCILL-B license under French law and

# abiding by the rules of distribution of free software.  You can  use, 

# modify and/ or redistribute the software under the terms of the CeCILL-B

# license as circulated by CEA, CNRS and INRIA at the following URL

# "http://www.cecill.info". 

#

# As a counterpart to the access to the source code and  rights to copy,

# modify and redistribute granted by the license, users are provided only

# with a limited warranty  and the software's author,  the holder of the

# economic rights,  and the successive licensors  have only  limited

# liability. 

#

# In this respect, the user's attention is drawn to the risks associated

# with loading,  using,  modifying and/or developing or reproducing the

# software by the user in light of its specific status of free software,

# that may mean  that it is complicated to manipulate,  and  that  also

# therefore means  that it is reserved for developers  and  experienced

# professionals having in-depth computer knowledge. Users are therefore

# encouraged to load and test the software's suitability as regards their

# requirements in conditions enabling the security of their systems and/or 

# data to be ensured and,  more generally, to use and operate it in the 

# same conditions as regards security. 

#

# The fact that you are presently reading this means that you have had

# knowledge of the CeCILL-B license and that you accept its terms.

#

import json

import logging

import time

from django.conf import settings

from django.shortcuts import redirect, get_object_or_404

from django.views.generic import DetailView, View

from rest_framework.renderers import UnicodeJSONRenderer

from p4l.api.serializers import RecordSerializer

from p4l.models import Record

from p4l.utils import get_labels_for_uris

logger = logging.getLogger(__name__)

QUERY_FIELDS_TRANSLATION = {

    'url': 'dataurl',

    'filter': 'dataquery',

    'root': 'datarootquery',

    'childs': 'datachildsquery',

    'child-count': 'datachildcountquery'

}

def get_record_uri_labels(record, lang):

    uri_labels = get_labels_for_uris([s.uri for s in record.subjects.all()], settings.RDF_SCHEMES['subjects'], lang, False)

    uri_labels.update(get_labels_for_uris([s.uri for s in record.themes.all()], settings.RDF_SCHEMES['themes'], lang, False))

    uri_labels.update(get_labels_for_uris([s.uri for s in record.countries.all()], settings.RDF_SCHEMES['countries'], lang, False))

    uri_labels.update(get_labels_for_uris([record.language.uri] if record.language else [], settings.RDF_SCHEMES['languages'], lang, False))

    uri_labels.update(get_labels_for_uris([s.uri for s in record.otherLanguages.all()], settings.RDF_SCHEMES['languages'], lang, False))

    uri_labels.update(get_labels_for_uris([s.uri for s in record.projectNames.all()], settings.RDF_SCHEMES['projects'], None, True))

    uri_labels.update(get_labels_for_uris([s.uri for s in record.subjectCorporateBodies.all()], settings.RDF_SCHEMES['organizations'], None, True))

    uri_labels.update(get_labels_for_uris([s.uri for s in record.corporateAuthors.all()], settings.RDF_SCHEMES['organizations'], None, True))

    uri_labels.update(get_labels_for_uris([record.recordType] if record.recordType else [], settings.RDF_SCHEMES['types'], lang, False))

    uri_labels.update(get_labels_for_uris([s.uri for s in record.audiences.all()], settings.RDF_SCHEMES['audiences'], None, True))

    return uri_labels

class RecordDetailView(DetailView):

    model = Record

    template_name = "p4l/record_view.html"

    slug_field = "identifier"

    def get_context_data(self, **kwargs):

        context = DetailView.get_context_data(self, **kwargs)

        # We get the language, "fr" by default

        lang = "fr"

        if "lang" in self.request.GET:

            lang = self.request.GET["lang"]

        elif hasattr(self.request, "LANGUAGE_CODE") and self.request.LANGUAGE_CODE in ["fr","en","es"]:

            lang = self.request.LANGUAGE_CODE

        context['uri_labels'] = get_record_uri_labels(self.object,lang)

        return context

class RecordEditView(DetailView):

    http_method_names = ['get']

    template_name = 'p4l/record_update_form.html'

    model = Record

    slug_field = "identifier"

    is_create_view = False

    def get_empty_object(self):

        obj = Record()

        obj.id = -1

        obj.identifier = "T" + str(int(time.time()))

        obj.uri = "http://www.iiep.unesco.org/plan4learning/record/" + obj.identifier

        return obj

    def get_object(self, *args, **kwargs):

        """

        Returns the object the view is displaying.

        By default this requires `self.queryset` and a `pk` or `slug` argument

        in the URLconf, but subclasses can override this to return any object.

        """

        if self.is_create_view:

            return self.get_empty_object()

        return super(RecordEditView, self).get_object(*args, **kwargs)

    def get_context_data(self, **kwargs):

        context = super(RecordEditView, self).get_context_data(**kwargs)

        if self.object:

            serializer = RecordSerializer(self.object)

            context['object_json'] = UnicodeJSONRenderer().render(serializer.data)

        else:

            context['object_json'] = "null"

        # We get the language, "fr" by default

        lang = "fr"

        if "lang" in self.request.GET:

            lang = self.request.GET["lang"]

        elif hasattr(self.request, "LANGUAGE_CODE") and self.request.LANGUAGE_CODE in ["fr","en","es"]:

            lang = self.request.LANGUAGE_CODE

        context['uri_labels'] = json.dumps(get_record_uri_labels(self.object,lang))

        # lang must be like "XX" in the sparql request 

        lang = '"' + lang + '"'

        query_dicts = dict([(k , dict([ (QUERY_FIELDS_TRANSLATION[key],value.format(lang=lang)) for key,value in v.items()  ])) for k,v in settings.SPARQL_REF_QUERIES.items()])

        context['query_dicts'] = json.dumps(query_dicts)

        # Languages list used in drop down list

        context['languages_list'] = json.dumps(settings.LANGUAGES_LIST)

        context['is_create_view'] = json.dumps(self.is_create_view)

        return context

class RecordDeleteView(View):

    def get(self, request, slug, **kwargs):

        rec = get_object_or_404(Record, identifier=slug)

        rec.delete()

        return redirect('p4l_home')