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

from django.conf import settings

from django.core.management import BaseCommand

from p4l.models import Subject

from p4l.utils import show_progress

import logging

import requests

logger = logging.getLogger(__name__)

class Command(BaseCommand):

    query = """

PREFIX skos:<http://www.w3.org/2004/02/skos/core#>

PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX owl:<http://www.w3.org/2002/07/owl#>

PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>

SELECT ?uri ?label 

WHERE {

    ?uri skos:inScheme <http://skos.um.es/unescothes/CS000> .

    ?uri skos:prefLabel|skos:label ?label .

    FILTER (?uri = $root)

}

"""

    def fill_label(self):

        # Loads Subjects label from sparkl query

        subjects = Subject.objects.filter(label=None)

        total_subjects = len(subjects)

        writer = None

        i = 0

        found = 0

        for s in subjects:

            i += 1

            res = requests.get(

                settings.SPARQL_QUERY_ENDPOINT,

                params={'query':self.query, 'timeout':10, '$root' : "<"+s.subject+">"},

                headers={'accept':'application/sparql-results+json'},

            )

            if not res.ok:

                continue

            elif res.text:

                json_res = res.json()

                if 'results' in json_res and 'bindings' in json_res['results'] and len(json_res['results']['bindings'])>0:

                    # json_res['results']['bindings'] has several languages. If we find french, we save the french label.

                    # If not, we save the first one.

                    tmp_dict = {}

                    first_label = None

                    # We create a temporary dict with the lang code and the label

                    for b in json_res['results']['bindings']:

                        if 'label' in b and 'value' in b['label'] and 'xml:lang' in b['label']:

                            tmp_dict[b['label']['xml:lang']] = b['label']['value']

                            if not first_label:

                                first_label = b['label']['value']

                    if 'fr' in tmp_dict or first_label:

                        if 'fr' in tmp_dict:

                            s.label = tmp_dict['fr']

                        else:

                            s.label = first_label

                        l = s.label

                        s.save()

                        found += 1

                        writer = show_progress(i, total_subjects, l, 50, writer=writer)

        print("Processing Subjects Sparql Done. %d found on %d" % (found, total_subjects))

    def handle(self, *args, **options):

        self.fill_label()