from django.views.generic.edit import UpdateView
from django.views.generic import ListView
from musicians.models import Musician
from django import forms
from django.http import HttpResponseRedirect
from django.shortcuts import render
from django.shortcuts import get_object_or_404


class MusicianList(ListView):
    model = Musician


class UserEditForm(forms.ModelForm):
    email = forms.EmailField()

    def __init__(self, *args, **kw):

        if 'instance' in kw.keys():
            user = kw['instance'].user
            initVals = {'email': user.email}
            if not 'initial' in kw.keys():
                kw['initial'] = initVals
            else:
                kw['initial'].update(initVals)

        super(UserEditForm, self).__init__(*args, **kw)

        self.fields.keyOrder.remove('email')

        self.fields.keyOrder.insert(2, 'email')

    def save(self):
        if self.is_valid():
            super(UserEditForm, self).save()
            self.instance.user.email = self.cleaned_data['email']
            self.instance.user.save()

    class Meta:
        model = Musician
        exclude = ['user', 'image', 'small_image', 'instrument', 'position', 'public_description']
        # fields = '__all__'


def own_profile(request):
    return user_edit(request, request.user)


def user_edit(request, username):
    musician = get_object_or_404(Musician, user__username=username)

    if request.method == 'POST':  # If the form has been submitted...
        form = UserEditForm(request.POST)  # A form bound to the POST data
        form.instance = musician
        if form.is_valid():  # All validation rules pass
            form.save()
            return HttpResponseRedirect('/')  # Redirect after POST
    else:
        form = UserEditForm(instance=musician)

    return render(request, 'musicians/musician_edit.html', {'form': form, 'musician': musician})


class MusicianUpdate(UpdateView):
    model = Musician
    # fields = []
    template_name = "musicians/musician_edit.html"
    success_url = '/books/'


def addressbook(request):
    context = dict()
    context['musicians'] = Musician.objects.all().order_by('user__first_name')

    return render(request, 'musicians/addressbook.html', context)


############################################################################################################
######################### User Management Views ############################################################
############################################################################################################


from django.contrib.auth.views import PasswordChangeView
from django.contrib.auth import authenticate, login, logout
from django.shortcuts import redirect
from django.http import HttpResponse
import json
from django.contrib.auth.models import User
from datetime import timedelta


def change_password(request):
    return PasswordChangeView.as_view(request, "musicians/change_password.html", post_change_redirect="/")


def logout_view(request):
    logout(request)
    return redirect(login_view)


def userlistForAutocompletion(request):
    result = [u.username for u in User.objects.all()]
    return HttpResponse(json.dumps(result), content_type='application/json')


def login_view(request):
    if request.method == 'POST':  # If the form has been submitted...
        raise_first_letter = lambda s: s[:1].upper() + s[1:] if s else ''
        username = raise_first_letter(request.POST['username'])
        password = request.POST['password']
        user = authenticate(username=username, password=password)
        result = dict()
        result['err'] = ""
        if user is not None:
            if user.is_active:
                if not request.POST.get('remember', None):
                    # Expire in one year
                    request.session.set_expiry(timedelta(weeks=52).seconds)
                else:
                    # Expire on browser close
                    request.session.set_expiry(0)

                login(request, user)
                result['redirect'] = "/"
                print("Setting Redirect")
                if 'next' in request.POST:
                    result['redirect'] = request.POST["next"]
                    print("Using " + request.POST["next"])
            else:
                result['err'] = "Dein Account wurde deaktiviert."
                # Return a 'disabled account' error message
        else:
            result['err'] = "Falscher Benutzername oder falsches Kennwort."

        return HttpResponse(json.dumps(result), content_type='application/json')

    else:
        # Check if user already logged in
        if request.user.is_authenticated:
            return redirect("/")

        if 'next' in request.GET:
            nextPage = request.GET['next']
        else:
            nextPage = "/"
        return render(request, 'musicians/login.html', {'next': nextPage})