# -*- coding: utf-8 -*-
from django.conf import settings
from hdabo.models import Tag
from wikitools import api, wiki

def __is_homonymie(page_dict):
    for cat in page_dict.get(u"categories", []):
        if u'Catégorie:Homonymie' in cat.get(u"title", u"") or u'Category:Disambiguation pages' in cat.get(u"title", u""):
            return True
    return False

def query_wikipedia_title(site, label):
    
    params = {'action':'query', 'titles': label, 'prop':'info|categories', 'inprop':'url'}            
    wpquery = api.APIRequest(site, params) #@UndefinedVariable
    
    response = wpquery.query()    

    query_dict = response['query']
    # get page if multiple pages or none -> return Tag.null_result
    pages = query_dict.get("pages", {})
    if len(pages) > 1 or len(pages) == 0:
        return None, Tag.TAG_URL_STATUS_DICT["null_result"], None, None, response
    
    page = pages.values()[0]
    
    if u"invalid" in page or u"missing" in page:
        return None, Tag.TAG_URL_STATUS_DICT["null_result"], None, None, response

    url = page.get(u'fullurl', None)
    pageid = page.get(u'pageid', None)
    new_label = page[u'title']
    
    if __is_homonymie(page):
        status = Tag.TAG_URL_STATUS_DICT["homonyme"]
    elif u"redirect" in page:
        status = Tag.TAG_URL_STATUS_DICT["redirection"]
    else:
        status = Tag.TAG_URL_STATUS_DICT["match"]

    return new_label, status, url, pageid, response

def normalize_tag(tag):
    if len(tag) == 0:
        return tag
    tag = tag.strip()
    tag = tag.replace("_", " ")
    tag = " ".join(tag.split())
    tag = tag[0].upper() + tag[1:]
    return tag


def get_or_create_tag(tag_label):
    
    tag_label_normalized = normalize_tag(tag_label)
    # We get the wikipedia references for the tag_label
    # We get or create the tag object
    
    tag, created = Tag.objects.get_or_create(label__iexact=tag_label_normalized, defaults={'label':tag_label_normalized, 'original_label':tag_label})

    if created:
        site = wiki.Wiki(settings.WIKIPEDIA_API_URL) #@UndefinedVariable
        new_label, status, url, pageid, response = query_wikipedia_title(site, tag_label_normalized) #@UnusedVariable
    
        # We save the datas
        if new_label is not None:
            tag.label = new_label
        if status is not None:
            tag.url_status = status
        if url is not None:
            tag.wikipedia_url = url
        else:
            tag.wikipedia_url = None
            
        if pageid is not None:
            tag.wikipedia_pageid = pageid
        else:
            tag.wikipedia_pageid = None

        tag.save()
        
    return tag, created