from django.shortcuts import render, redirect
from django.contrib.auth import logout, login
from django.contrib.auth.forms import AuthenticationForm as AuthForm
from django.contrib.auth.forms import PasswordChangeForm
from django.contrib.auth import update_session_auth_hash
from django.views.generic import TemplateView
from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponse
from ..navbar import NavBar
from ..forms import QrSearchForm

class BaseTemplateMixin():
    navbar_selected = ''
    base_title = ''

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        base_context = {
            'navbar': NavBar.get_navbar(self.navbar_selected, self.request.user),
            'title': NavBar.get_brand()+' / '+ self.base_title,
            'login_active': False,
        }
        context['base'] = base_context
        return context

    def post(self, request, *args, **kwargs):
        data = request.POST
        if 'qr_search' not in data:
            super().post(request, *args, **kwargs)

        print('QR',data['qr_search'])
        f = QrSearchForm(data)
        if f.is_valid():
            return redirect(f.my_qr_validator.get_redirect_url(f.cleaned_data['qr_search']))

        return self.get(request)

class ChangePasswordView(LoginRequiredMixin, BaseTemplateMixin, TemplateView):
    template_name = 'parts/change-pw.html'
    navbar_selected = 'Main'
    base_title = 'Change Password'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['form'] = PasswordChangeForm(self.request.user)
        return context

    def post(self, request, *args, **kwargs):
        if 'submit-change-pw' not in request.POST:
            return super().post(request, *args, **kwargs)

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

        if form.is_valid():
            user = form.save()
            update_session_auth_hash(request, user)
            return redirect('parts-main')

        context = self.get_context_data(**kwargs)
        if form.errors:
            context['form'] = form

        return self.render_to_response(context)


class MainView(BaseTemplateMixin, TemplateView):
    template_name = 'parts/main.html'
    navbar_selected = 'Main'
    base_title = 'Main'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['user'] = self.request.user
        return context


def logout_view(request):
    logout(request)
    return redirect('parts-main')

def login_view(request):
    base_context = {
        'navbar': NavBar.get_navbar('Login', request.user),
        'title': NavBar.get_brand()+' / '+'Login',
        'login_active': True,
    }

    if request.user.is_authenticated:
        next_param = request.GET.get('next')
        if next_param is not None:
            return redirect(next_param)
        return redirect('parts-main')

    if request.method == 'POST':
        form = AuthForm(data=request.POST)
        if form.is_valid():
            valid_user = form.get_user()
            login(request, valid_user)
            next_param = request.GET.get('next')
            if next_param is not None:
                return redirect(next_param)
            return redirect('parts-main')
    else:
        form = AuthForm()


    context = {
        'base': base_context,
        'form': form,
    }

    return render(request, 'parts/login.html', context)



def health_check_view(_request) -> HttpResponse:
    """
    Health checking view. Returns empty http response with HTTP status OK.
    This will be used to check if the system is actually running correctly
    """
    return HttpResponse(status=200)