from django.http import HttpResponse

from django.shortcuts import redirect, render_to_response

from pytask.taskapp.models import Task

from pytask.taskapp.forms.user import RegistrationForm, LoginForm

from pytask.taskapp.events.user import createUser

from django.contrib.auth import login, logout, authenticate

from django.contrib.auth.models import User

    """ simply redirect to homepage """

def homepage(request):

    """ check for authentication and display accordingly. """

    user = request.user

    is_guest = False

    is_mentor = False

    can_create_task = False

    task_list = []

    if not user.is_authenticated():

        is_guest = True

        disp_num = 10

        tasks_count = Task.objects.count()

        if tasks_count <= disp_num:

            task_list = Task.objects.order_by('id').reverse()

        else:

            task_list = Task.objects.order_by('id').reverse()[:10]

    else:

        user_profile = user.get_profile()

        is_mentor = True if user.task_mentors.all() else False

        can_create_task = False if user_profile.rights == u"CT" else True

    context = {'user':user,

               'is_guest':is_guest,

               'is_mentor':is_mentor,

               'task_list':task_list,

               'can_create_task':can_create_task,

               }

    return render_to_response('index.html', context)

def register(request):

    """ user registration: gets the user details and create the user and userprofile if data entered is valid"""

    if request.method == 'POST':

        form = RegistrationForm(request.POST)

        if form.is_valid():

            data = form.cleaned_data

            if data['password'] == data['repeat_password']:

                if data['username'].isalnum():

                    try:

                        if User.objects.get(username__exact = data['username']):

                            errors=['Choose some other username']

                            return render_to_response('user/register.html',{'form':form,'errors':errors})

                    except:

                         u = createUser(username=data['username'], email=data['email'], password=data['password'],dob = data['dob'],gender = data['gender'])

                    return redirect('/accounts/login/')

                else:

                    errors = ['Username can contain only alphabets and numbers!']

                    return render_to_response('user/register.html',{'form':form,'errors':errors})

            else:

                errors=['Password do not match']

                form = RegistrationForm(request.POST)

                return render_to_response('user/register.html',{'form':form,'errors':errors})#HttpResponse('Password did not match')

        else:

            form = RegistrationForm(request.POST)

    else:

        form = RegistrationForm()

    return render_to_response('user/register.html', {'form': form})

def user_login(request):

    if request.method == 'POST':

        username = request.POST['username']

        password = request.POST['password']

        user = authenticate(username=username, password=password)

        if user is not None:

            if user.is_active:

                login(request, user)

                return redirect('/')# Redirect to a success page.

            else:

        else:

            errors = ['Please check your username and password']

            form = LoginForm()

            return render_to_response('user/login.html',{'form':form,'errors':errors})# Return an 'invalid login' error message.

        return redirect('/')

    else:

        form = LoginForm()

        return render_to_response('user/login.html',{'form': form})

def user_logout(request):

    logout(request)