# -*- coding: utf-8 -*-
from django.shortcuts import  render_to_response, get_object_or_404
from django.http import HttpResponseRedirect
from django.core.context_processors import csrf
from django.conf import settings
from django.contrib.auth.decorators import login_required
from django.contrib.contenttypes.models import ContentType
from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage
#models and forms
from forms import ArticleForm, Article, ArticleChangeForm
from theme.models import Tag
from file.models import FileModel, TmpFile
from file.forms import FileModelForm
#pythom
import random


@login_required
def article_add(request):
    """
    Return form of article and post it on the server.
    If form is posted redirect on the page of all articles.
    """
    #if form would be not valid key must be same
    if request.POST.get('key'):
        key = request.POST['key']
    else:
        key = random.getrandbits(128)

    file_form = FileModelForm(initial={'key': key})

    if request.POST:
        form = ArticleForm(request.POST)
        #set choices filled by ajax
        form.fields['tag'].choices = [(item.id, item.name) for item in Tag.objects.all()]

        if form.is_valid():
            form.save()
            return HttpResponseRedirect('/article/all')
    else:
        form = ArticleForm(initial={'key': key})

    args = {}
    args.update(csrf(request))

    args['form'] = form
    args['languages'] = settings.LANGUAGES
    args['file_form'] = file_form
    args['files'] = TmpFile.objects.filter(key=key)

    return render_to_response('article_add.html', args)

@login_required
def article_all(request):
    """
    Return list of all articles with pagination
    """
    article_list = Article.objects.all()
    paginator = Paginator(article_list, 1)#show 10 items per page
    page = request.GET.get('page')
    try:
        articles = paginator.page(page)
    except PageNotAnInteger:
    # If page is not an integer, deliver first page.
        articles = paginator.page(1)
    except EmptyPage:
    # If page is out of range (e.g. 9999), deliver last page of results.
        articles = paginator.page(paginator._num_pages)
    return render_to_response('article_all.html', {'articles': articles})



def article_change(request, url):
    """
    Return form and fill it with existing Article object data.

    If form is posted redirect on the page of all articles.
    """
    try:
    #check if article_id exists else redirect to the list of cities
        article = Article.objects.get(url=url)
        file_form = FileModelForm(initial={'model': 'article.Article'})
    except:
        return HttpResponseRedirect('/article/all')

    if request.POST:
        form = ArticleChangeForm(request.POST)
        #set choices filled by ajax
        form.fields['tag'].choices = [(item.id, item.name) for item in Tag.objects.all()]

        if form.is_valid():
            form.save(getattr(article, 'id'))
            return HttpResponseRedirect('/article/all')
    else:
        data = {}
        #fill form with data from database
        data['author'] = article.author
        data['theme'] = [item.id for item in article.theme.all()]
        data['tag'] = [item.id for item in article.tag.all()]
        #data from translated fields
        for code, name in settings.LANGUAGES:
            obj = Article._meta.translations_model.objects.get(language_code = code,master__id=getattr(article, 'id')) #access to translated fields
            data['main_title_%s' % code] = obj.main_title
            data['preview_%s' % code] = obj.preview
            data['description_%s' % code] = obj.description
            data['title_%s' % code] = obj.title
            data['keywords_%s' % code] = obj.keywords
            data['descriptions_%s' % code] = obj.descriptions
        #fill form
        form = ArticleChangeForm(initial=data)
        #set choices filled by ajax
        form.fields['tag'].choices = [(item.id, item.name) for item in Tag.objects.filter(theme__in=data['theme'])]

    args = {}
    args.update(csrf(request))

    args['form'] = form
    args['languages'] = settings.LANGUAGES
    args['file_form'] = file_form

    #get list of files which connected with specific model object
    args['files'] = FileModel.objects.filter(content_type=ContentType.objects.get_for_model(article), object_id=getattr(article, 'id'))
    args['obj_id'] = getattr(article, 'id')


    return render_to_response('article_add.html', args)