from urlparse import urlparse

import simplejson as json

import os

from django.conf import settings

from django.contrib.auth.decorators import login_required

from django.contrib.auth.forms import AuthenticationForm

from django.contrib.auth.forms import PasswordChangeForm

from django.contrib.auth.models import User

from django.core.exceptions import ObjectDoesNotExist

from django.core.urlresolvers import reverse

from django.db.models import Q

from django.http import HttpResponse

from django.shortcuts import render_to_response

from django.template import RequestContext

from PIL import Image

from project.scipycon.base.models import Event

from project.scipycon.registration.models import Registration

from project.scipycon.registration.models import Wifi

from project.scipycon.registration.forms import WifiForm

from project.scipycon.talk.models import Talk

from project.scipycon.user.forms import EditProfileForm

from project.scipycon.user.forms import RegisterForm

from project.scipycon.user.forms import UsernameForm

from project.scipycon.user.utils import handle_uploaded_photo

from project.scipycon.user.utils import scipycon_createuser

from project.scipycon.utils import set_message_cookie

@login_required

def account(request, scope, template_name="user/account.html"):

    """Displays the main screen of the current user's account.

    """

    user = request.user

    profile = user.get_profile()

    talks = Talk.objects.filter(speaker=user)

    try:

        registration = Registration.objects.get(registrant=user)

    except ObjectDoesNotExist:

        registration = None

    try:

        wifiobj = Wifi.objects.get(user=user)

    except ObjectDoesNotExist:

        wifiobj = None

    event = Event.objects.get(scope=scope)

    if profile.photo:

        photo = os.path.join(settings.USER_MEDIA_URL, profile.photo)

    else:

        photo = '/img/user-default.png'

    return render_to_response(template_name, RequestContext(request, {

        'params': {'scope': scope},

        'user' : user,

        'profile' : profile,

        'photo' : photo,

        'talks' : talks,

        'registration' : registration,

        'event': event}))

@login_required

def edit_profile(request, scope, template_name="user/editprofile.html"):

    """Allows user to edit profile

    """

    user = request.user

    profile = user.get_profile()

    if request.method == "POST":

        form = EditProfileForm(data=request.POST,

                               files=request.FILES)

        if form.is_valid():

            photo = request.FILES.get('photo', None)

            filename= None

            if photo:

                filename = handle_uploaded_photo(user, request.FILES['photo'])

            if filename:

                profile.photo = filename

            user.email = form.data.get("email")

            user.first_name = form.data.get("first_name")

            user.last_name = form.data.get("last_name")

            user.save()

            profile.url = form.data.get("url")

            profile.about = form.data.get("about")

            profile.save()

            redirect_to = reverse('scipycon_account',

                                  kwargs={'scope': scope})

            return set_message_cookie(redirect_to,

                    msg = u'Your profile has been changed.')

    else:

        form = EditProfileForm(

            initial={

                'email' : user.email,

                'email2' : user.email, # hidden field

                'first_name' : user.first_name,

                'last_name' : user.last_name,

                'url' : profile.url,

                'about' : profile.about,

            })

    return render_to_response(template_name, RequestContext(request, {

        'params': {'scope': scope},

        'form': form

    }))

def login(request, scope, template_name="user/login.html"):

    """Custom view to login or register/login a user.

       Integration of register and login form

       It uses Django's standard AuthenticationForm, though.

    """

    user = request.user

    if user.is_authenticated():

        redirect_to = reverse("scipycon_account", kwargs={'scope': scope})

        return set_message_cookie(redirect_to,

                msg = u"Redirected to account from login form.")

    # Using Djangos default AuthenticationForm

    login_form = AuthenticationForm()

    register_form = RegisterForm()

    if request.POST.get("action") == "login":

        login_form = AuthenticationForm(data=request.POST)

        if login_form.is_valid():

            redirect_to = request.POST.get("next")

            # Light security check -- make sure redirect_to isn't garbage.

            if not redirect_to or '//' in redirect_to or ' ' in redirect_to:

                redirect_to = reverse('scipycon_account',

                                      kwargs={'scope': scope})

            from django.contrib.auth import login

            login(request, login_form.get_user())

            return set_message_cookie(redirect_to, msg = u"You have been logged in.")

    elif request.POST.get("action") == "register":

        register_form = RegisterForm(data=request.POST)

        if register_form.is_valid():

            user = scipycon_createuser(request, register_form.data, scope)

            redirect_to = request.POST.get("next")

            if not redirect_to or '//' in redirect_to or ' ' in redirect_to:

                redirect_to = reverse('scipycon_account',

                                      kwargs={'scope': scope})

            return set_message_cookie(

                redirect_to, msg = u"You have been registered and logged in.")

    # Get next_url

    next_url = request.REQUEST.get("next")

    if next_url is None:

        next_url = request.META.get("HTTP_REFERER")

    if next_url is None:

        next_url = reverse('scipycon_account', kwargs={'scope': scope})

    # Get just the path of the url.

    # See django.contrib.auth.views.login for more

    next_url = urlparse(next_url)

    next_url = next_url[2]

    try:

        login_form_errors = login_form.errors["__all__"]

    except KeyError:

        login_form_errors = None

    return render_to_response(template_name, RequestContext(request, {

        'params': {'scope': scope},

        'login_form' : login_form,

        'login_form_errors' : login_form_errors,

        'register_form' : register_form,

        'next_url' : next_url,

    }))

def logout(request, scope):

    """Custom method to logout a user.

    The reason to use a custom logout method is just to provide a login and a

    logoutmethod on one place.

    """

    from django.contrib.auth import logout

    logout(request)

    redirect_to = '/%s' % (scope)

    return set_message_cookie(redirect_to, msg = u"You have been logged out.")

@login_required

def password(request, scope, template_name='user/password.html'):

    """Changes the password of current user.

    """

    if request.method == 'POST':

        form = PasswordChangeForm(request.user, request.POST)

        if form.is_valid():

            form.save()

            redirect_to = reverse('scipycon_account', kwargs={'scope': scope})

            return set_message_cookie(redirect_to,

                    msg = u'Your password has been changed.')

    else:

        form = PasswordChangeForm(request.user)

    return render_to_response(template_name, RequestContext(request, {

        'params': {'scope': scope},

        'form' : form

    }))

@login_required

def username(request, scope, template_name='user/username.html'):

    """Saves the username from the data form.

    """

    if request.method == 'POST':

        username_form = UsernameForm(

            initial={'username' : request.user.username},

            data=request.POST)

        if username_form.is_valid():

            request.user.username = username_form.cleaned_data.get("username")

            request.user.save()

            redirect_to = reverse('scipycon_account',

                                  kwargs={'scope': scope})

            return set_message_cookie(redirect_to,

                    msg = u"Your username has been changed.")

    else:        

        username_form = UsernameForm(initial={"username" : request.user.username})

    return render_to_response(template_name, RequestContext(request, {

        'params': {'scope': scope},

        'form': username_form

    }))

def get_usernames(request, scope):

    """Returns in json the list of ten possible usernames

    starting with the last pattern in the comma separated string

    """

    get_params = request.GET

    authors_str = get_params.get('input')

    if not authors_str:

        return HttpResponse(json.dumps(''))

    authors = authors_str.split(',')

    search_author = authors[-1].strip()

    users = User.objects.filter(

        Q(username__istartswith=search_author) | Q(

        first_name__istartswith=search_author) | Q(

        last_name__istartswith=search_author))

    results = [{'id': '',

                'info': 'plugin_header',

                'value': 'User Names'

              }]

    for user in users:

        results.append(

            {'id': 'author_name',

             'info': str(user.get_full_name()),

             'value': str(user.username)

            })

    json_response = {'results': results}

    return HttpResponse(json.dumps(json_response))