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

import os

from django.contrib.auth import login

from django.contrib.auth.decorators import login_required

from django.contrib.auth.forms import AuthenticationForm

from django.contrib.auth.models import User

from django.core.urlresolvers import reverse

from django.shortcuts import render_to_response

from django.template import RequestContext

from project.kiwipycon.proceedings.models import Paper

from project.kiwipycon.user.forms import RegisterForm

from project.kiwipycon.user.models import UserProfile

from project.kiwipycon.utils import set_message_cookie

from project.kiwipycon.proceedings.booklet import mk_scipy_paper

from project.kiwipycon.proceedings.forms import ProceedingsForm

def handleUploadedFile(proceedings_form_data, rst_file):

    """Handles the uploaded file content and process the form

    """

    title = proceedings_form_data.get('title')

    abstract = proceedings_form_data.get('abstract')

    body = proceedings_form_data.get('body')

    authors = proceedings_form_data.get('authors')

    if rst_file:

        destination = open('some/file/name.txt', 'wb+')

        for chunk in rst_file.chunks():

            destination.write(chunk)

        destination.close()

    return title, abstract, body, authors

@login_required

def submit(request, id=None, template='proceedings/submit.html'):

    """View to submit the proceedings paper.

    """

    user = request.user

    if user.is_authenticated():

        try:

            profile = user.get_profile()

        except:

            profile, new = UserProfile.objects.get_or_create(user=user)

            if new:

                profile.save()

    message = None

    if request.method == 'POST':

        register_form = RegisterForm(data=request.POST)

        if request.POST.get('action', None) == 'login':

            login_form = AuthenticationForm(data=request.POST)

            if login_form.is_valid():

                login(request, login_form.get_user())

                redirect_to = reverse('kiwipycon_submit_proceedings')

                return set_message_cookie(redirect_to,

                        msg = u'You have been logged in.')

        if request.POST.get('action', None) == 'register':

            # add the new user

            if register_form.is_valid():

                user = kiwipycon_createuser(request, register_form.data)

        proceedings_form = ProceedingsForm(data=request.POST,

                                           files=request.FILES)

        if proceedings_form.is_valid():

            if user.is_authenticated():

                # Data from reSt file is appended to the data in fields

                title, abstract, body, authors = handleUploadedFile(

                    proceedings_form.cleaned_data, request.FILES.get('file'))

                paper = edit(id, title=title,

                    abstract=abstract, body=body,

                    authors=authors) if id else create(title=title,

                    abstract=abstract, body=body,

                    authors=authors)

                # Successfully saved. So get back to the edit page.

                redirect_to = reverse('kiwipycon_submit_proceedings',

                                  args=[paper.id])

                return set_message_cookie(

                redirect_to, msg = u'Thanks, your paper has been submitted.')

            else:

                # This is impossible. Something was wrong so return back

                # to submit page

                redirect_to = reverse('kiwipycon_submit_proceedings')

                return set_message_cookie(

                redirect_to, msg = u'Something is wrong here.')          

    else:

        if id:

            # If id exists initialize the form with old values

            paper = Paper.objects.get(id=id)

            proceedings_form = ProceedingsForm(

                initial={'title': paper.title,

                         'abstract': paper.abstract,

                         'body': paper.body,

                         'authors': ', '.join([

                             author.username for author in paper.authors.all()])

                })

        else:

            # Otherwise create a new form

            proceedings_form = ProceedingsForm()

        register_form = RegisterForm()

        login_form = AuthenticationForm()

    context = RequestContext(request, {

        'proceedings_form': proceedings_form,

        'register_form' : register_form,

        'message' : message,

        'login_form' : login_form

        })

    context['id'] = id if id else None

    return render_to_response(template, context)

def create(**kwargs):

    """View to create a new proceedings.

    """

    title = kwargs.get('title')

    abstract = kwargs.get('abstract')

    body = kwargs.get('body')

    authors = kwargs.get('authors')

    paper = Paper(title=title, abstract=abstract, body=body)

    paper.save()

    if authors:

        authors = authors.split(',')

        for author in authors:

            user = User.objects.get(username=author.strip())

            paper.authors.add(user)

    return paper

def edit(id, **kwargs):

    """View to edit the proceedings paper.

    """

    paper = Paper.objects.get(id=id)

    paper.title = kwargs.get('title')

    paper.abstract = kwargs.get('abstract')

    paper.body = kwargs.get('body')

    authors = kwargs.get('authors')

    if authors:

        authors = authors.split(',')

        for author in authors:

            user = User.objects.get(username=author.strip())

            paper.authors.add(user)

    paper.save()

    return paper

def show_paper(request, id):

    """Display the thumbnail of the rendered paper for download

    """

    paper = Paper.objects.get(id=id)

    paper_data = {

      'paper_abstract': paper.abstract,

      'authors': [

          {'first_names': author.first_name,

            'surname': author.last_name,

            'address': 'XXX',

            'country': 'XXX',

            'email_address': 'XXX@xx.com',

            'institution': 'XXX'

           } for author in paper.authors.all()],

      'title': paper.title

      }

    abstract = mk_scipy_paper.Bunch(**paper_data)

    abstract.authors = [mk_scipy_paper.Bunch(**a) for a in abstract.authors]

    abstract['paper_text'] = paper.body

    outfilename = '/media/python/workspace/kiwipycon/project/kiwipycon/proceedings/booklet/output/paper.pdf'

    attach_dir = os.path.dirname('/media/python/workspace/kiwipycon/project/kiwipycon/proceedings/booklet/output/')

    mk_scipy_paper.mk_abstract_preview(abstract, outfilename, attach_dir)

    from django.http import HttpResponse

    return HttpResponse('Machi')