from django.contrib.auth.models import User
from django.contrib.auth import authenticate, login, logout
from django.contrib.auth.decorators import login_required

from django.shortcuts import render_to_response, redirect

from workshop.reg.models import Event
from workshop.reg import forms as reg_forms
from workshop.reg import events as reg_events

from django.http import HttpResponse

def homepage(request):
    """ see if the user is active.
    If not, only show the re send activation email link.
    else show all the options in homepage.
    """

    user = request.user

    events = Event.objects.all()[:10]


def user_login(request):
    """ get the user object from e-mail and then check for password.
    """

    user = request.user
    if user.is_authenticated():
        return redirect('/reg')

    if request.method == "POST":
        form = reg_forms.LoginForm(request.POST)
        if form.is_valid():
            email = form.cleaned_data['email']
            password = form.cleaned_data['password']
            username = User.objects.get(email__iexact=email).username

            user = authenticate(username=username, password=password)
            login(request, user)
            return redirect('/reg')
        else:
            return render_to_response('login.html', {'form':form})
    else:
        form = reg_forms.LoginForm()
        return render_to_response('login.html', {'form':form})

def user_logout(request):
    """ simply logout the user and redirect to homepage.
    """

    logout(request)
    return redirect('/reg')

def user_register(request):
    """ take the credentials like name, college and gender here itself.
    """

    if request.method == "POST":
        form = reg_forms.RegisterForm(request.POST)
        if form.is_valid():
            data = form.cleaned_data
            reg_events.create_user(email=data['email'], 
                                   password=data['password'],
                                   firstname=data['first_name'],
                                   lastname=data['last_name'], 
                                   gender=data['gender'], 
                                   profession=data['profession'], 
                                   affiliated_to=data['affiliated_to'], 
                                   interests=data['interests']
                                  )
            return render_to_response('account_created.html')
        else:
            return render_to_response('register.html', {'form':form})
    else:
        form = reg_forms.RegisterForm()
        return render_to_response('register.html', {'form':form})

def create_event(request):
    """ see if the user is a staff and only then let him do it.
    """

    user = request.user
    if user.is_authenticated() and user.is_staff:
        if request.method ==  "POST":
            form = reg_forms.EventCreateForm(request.POST)
            if form.is_valid():
                data = form.cleaned_data
                new_event = reg_events.create_event(title=data['title'],
                                                    description=data['description'],
                                                    start_date=data['start_date'],
                                                    stop_date=data['stop_date'],
                                                    created_by=user,
                                                   )
                event_url = "/reg/event/view/%s"%(new_event.key)
                return redirect(event_url)
            else:
                return render_to_response('event_create.html', {'form':form})
        else:
            form = reg_forms.EventCreateForm()
            return render_to_response('event_create.html', {'form':form})
    else:
        return redirect('/reg')

def view_event(request, key):
    """ get the event by its key and display it.
    """

    user = request.user
    is_guest = False if user.is_authenticated() else True

    try:
        event = Event.objects.get(key__iexact=key)
    except Event.DoesNotExist:
        return HttpResponse("F off")

    return HttpResponse(str(event))

def reset_password(request):
    """ check for the existance of e-mail.
    Then call the event.
    """

    user = request.user
    if user.is_authenticated():
        return redirect('/reg')

    if request.method == "POST":
        form = reg_forms.PasswordResetForm(request.POST)
        if form.is_valid():
            email = form.cleaned_data['email']
            user = User.objects.get(email__iexact=email)
            new_password = reg_events.reset_password(user)
            return render_to_response('password_reset.html', {'new_password':new_password})
        else:
            return render_to_response('password_reset.html', {'form':form})
    else:
        form = reg_forms.PasswordResetForm()
        return render_to_response('password_reset.html', {'form':form})

def change_password(request):
    """ check for the password and then set the new password.
    """

    user = request.user
    if not user.is_authenticated():
        return redirect('/reg')

    if request.method == "POST":
        data = request.POST.copy()
        data.__setitem__('username', user.username)
        form = reg_forms.PasswordChangeForm(data)
        if form.is_valid():
            new_password = form.cleaned_data['new_password']
            reg_events.change_password(user, new_password)
            return render_to_response('password_change.html', {'password_changed': True})
        else:
            return render_to_response('password_change.html', {'form':form})
    else:
        form = reg_forms.PasswordChangeForm()
        return render_to_response('password_change.html', {'form':form})