from django.shortcuts import render_to_response, redirect

from django.http import HttpResponse, Http404

from django.contrib.auth.decorators import login_required

from django.utils.datastructures import MultiValueDictKeyError

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

from sage_days.sdi.models import Registrant

from sage_days.sdi.forms import RegisterForm, SearchForm, EmailForm, LoginForm, UserSelectForm

from sage_days.sdi.events import send_reg_complete_mail, mail_invi

from sage_days.settings import APACHE_URL_PREFIX as aup

def register(request):

    """ The user register page.

    """

    if request.method == "POST":

        form = RegisterForm(request.POST)

        if form.is_valid():

            form.save()

            data = form.cleaned_data

            first_name = data['first_name']

            last_name = data['last_name']

            email = data['email']

            send_reg_complete_mail(email, first_name, last_name)

            return redirect("/sage_days/registration/complete")

        else:

            return render_to_response("register.html", {"form":form})

    else:

        form = RegisterForm()

        return render_to_response("register.html", {"form":form})

def reg_complete(request):

    """ Tell the registration is successful.

    """

    return render_to_response("reg_complete.html")

@login_required

def list_stats(request):

    """ List the statiscs of registered participants.

    """

    if request.method == "POST":

        form = SearchForm(request.POST)

        if form.is_valid():

            data = form.cleaned_data

            #need_workshop = data['need_for_python_workshop']

            #acco_required = data['need_accomodation']

            #db_query = "Registrant.objects.filter(need_for_python_workshop=%s, acco_required=%s)"%(need_workshop, acco_required)

            db_query = "Registrant.objects"

            topics_include, topics_exclude = data['topics_interested']

            for number in topics_include:

                db_query += '.filter(topics_interested__contains="%s")'%number

            for number in topics_exclude:

                db_query += '.exclude(topics_interested__contains="%s")'%number

            start_python, stop_python = data['knowledge_of_python']

            if start_python and stop_python:

                db_query += '.filter(knowledge_of_python__gte="%s")'%start_python

                db_query += '.filter(knowledge_of_python__lte="%s")'%stop_python

            elif start_python:

                db_query += '.filter(knowledge_of_python__exact="%s")'%start_python

            start_sage, stop_sage = data['knowledge_of_sage']

            if start_sage and stop_sage:

                db_query += '.filter(knowledge_of_sage__gte="%s")'%start_sage

                db_query += '.filter(knowledge_of_sage__lte="%s")'%stop_sage

            elif start_sage:

                db_query += '.filter(knowledge_of_sage__exact="%s")'%start_sage

            start_likeliness, stop_likeliness = data['likeliness_of_attending']

            if start_likeliness and stop_likeliness:

                db_query += '.filter(likeliness_of_attending__gte="%s")'%start_likeliness

                db_query += '.filter(likeliness_of_attending__lte="%s")'%stop_likeliness

            elif start_likeliness:

                db_query += '.filter(likeliness_of_attending__exact="%s")'%start_likeliness

            db_query += ".all()"

            matches = eval(db_query)

            return render_to_response("list_stats.html", {"form":form, 'matches':matches})

        else:

            return render_to_response("list_stats.html", {"form":form})

    else:

        form = SearchForm()

        return render_to_response("list_stats.html", {"form":form})

@login_required

def send_invi(request):

    """ Take a list of csv email addresses and send mails to them.

    """

    if request.method == "POST":

        form = EmailForm(request.POST)

        if form.is_valid():

            to_emails = form.cleaned_data['emails']

            mail_invi(to_emails)

            return render_to_response("send_invi.html", {"emails":to_emails})

        else:

            return render_to_response("send_invi.html", {"form":form})

    else:

        form = EmailForm()

        return render_to_response("send_invi.html", {"form":form})

@login_required

def send_workshop_confirm(request):

    """ Show a list of all the ppl who requested for a workshop and 

    send a confirmation mail to them if not sent.

    """

    matches = Registrant.objects.filter(need_for_python_workshop=True, registrantinfo__status_of_attending_workshop="1")

    if request.method == "POST":

        form = UserSelectForm(matches, request.POST)

        if form.is_valid():

            selected_users = form.cleaned_data['selected_users']

            return render_to_response("sent_wsp_confirm.html", {"selected_users":selected_users})

        else:

            return render_to_response("send_workshop_confirm.html", {"matches":matches})

    else:

        return render_to_response("send_workshop_confirm.html", {"matches":matches}) 

def confirm_wsp_participation(request, uid):

    """ match id versus email and take lappy details.

    """

    try:

        email = request.GET['email']

    except MultiValueDictKeyError:

        raise Http404

    try:

        user = Registrant.objects.get(id=uid, email=email)

    except Registrant.DoesNotExist:

        raise Http404

    user_info = user.registrantinfo_set.all()[0]

    status = user_info.status_of_attending_workshop

    if status == "3":

        return render_to_response("attending_wsp.html")

    elif status != "2":

        raise Http404

    if request.method == "POST":

    else:

        return render_to_response("cnf_wsp_ptc.html", {"user":user})

def admin_login(request):

    """ basic login.

    """

    redirect_url = "/%s/registration/stats"%aup

    user = request.user

    if user.is_authenticated():

        return redirect(redirect_url)

    if request.method == "POST":

        form = LoginForm(request.POST)

        if form.is_valid():

            data = form.cleaned_data

            username = data['username']

            password = data['password']

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

            login(request, user)

            return redirect(redirect_url)

        else:

            return render_to_response("login.html", {"form":form})

    else:

        form = LoginForm()

        return render_to_response("login.html", {"form":form})

@login_required

def admin_logout(request):

    """ simply logout.

    """

    logout(request)

    return render_to_response("logout.html")

def homepage(request):

    return render_to_response("index.html")

def schedule(request):

    return render_to_response("schedule.html")

def organizers(request):

    return render_to_response("organizers.html")

def venue(request):

    return render_to_response("about_venue.html")

def contact(request):

    return render_to_response("contact.html")

def about(request):

    return render_to_response("about.html")

def accomodation(request):

    return render_to_response("accomodation.html")

def about_mumbai(request):

    return render_to_response("about_mumbai.html")

def reaching_iitb(request):

    return render_to_response("reaching_iitb.html")

def talks_proposed(request):

    return render_to_response("talks_proposed.html")