from django.contrib.auth.decorators import login_required
from django.contrib.messages.views import SuccessMessageMixin
from django.db.models import Q
from django.shortcuts import get_object_or_404
from django.utils.decorators import method_decorator
from django.urls import reverse
from django.http import HttpResponseRedirect
from django.views.generic import TemplateView, ListView, CreateView, DetailView, UpdateView, DeleteView

from jobs.forms import CreateJobForm, ApplyJobForm, UpdateJobForm
from jobs.models import Job, Category


class HomeView(ListView):
    template_name = 'jobs/index.html'
    context_object_name = 'jobs'
    model = Job
    paginate_by = 3

    def get_context_data(self, **kwargs):
        context = super(HomeView, self).get_context_data(**kwargs)
        context['categories'] = Category.objects.all()
        return context


@method_decorator(login_required(login_url='/'), name='dispatch')
class CreateJobView(SuccessMessageMixin, CreateView):
    model = Job
    template_name = 'jobs/create-jobs.html'
    form_class = CreateJobForm
    success_url = '/'
    success_message = "Job has been posted."

    def form_valid(self, form):
        job = form.save(commit=False)
        job.employer = self.request.user
        job.save()
        return super(CreateJobView, self).form_valid(form)


class SingleJobView(SuccessMessageMixin, UpdateView):
    template_name = 'jobs/single.html'
    model = Job
    context_object_name = 'job'
    form_class = ApplyJobForm
    success_message = "You applied this job!"

    def get_context_data(self, **kwargs):
        context = super(SingleJobView, self).get_context_data(**kwargs)
        context['categories'] = Category.objects.all()
        context['employee_applied'] = Job.objects.get(pk=self.kwargs['pk']).employee.all().filter(id=self.request.user.id)
        try:
            context['applied_employees'] = Job.objects.get(pk=self.kwargs['pk'], employer_id=self.request.user.id).employee.all()
            context['employer_id'] = Job.objects.get(pk=self.kwargs['pk']).employer_id
        except:
            pass
        return context

    def form_valid(self, form):
        employee = self.request.user
        form.instance.employee.add(employee)
        form.save()
        return super(SingleJobView, self).form_valid(form)

    def get_success_url(self):
        return reverse('jobs:single_job', kwargs={'slug':self.object.slug, "pk":self.object.pk})


class CategoryDetailView(ListView):
    model = Job
    template_name = 'jobs/category-detail.html'
    context_object_name = 'jobs'
    paginate_by = 2

    def get_queryset(self):
        self.category = get_object_or_404(Category, pk=self.kwargs['pk'])
        return Job.objects.filter(category=self.category)

    def get_context_data(self, *args, **kwargs):
        context = super(CategoryDetailView, self).get_context_data(*args, **kwargs)
        self.category = get_object_or_404(Category, pk=self.kwargs['pk'])
        context['categories'] = Category.objects.all()
        context['category'] = self.category
        return context


class SearchJobView(ListView):
    model = Job
    template_name = 'jobs/search.html'
    paginate_by = 2
    context_object_name = 'jobs'

    def get_queryset(self):
        q1 = self.request.GET.get("job_title")
        q2 = self.request.GET.get("job_type")
        q3 = self.request.GET.get("job_location")

        if q1 or q2 or q3:
            return Job.objects.filter(Q(title__icontains=q1) |
                                      Q(description__icontains=q1),
                                      job_type=q2,
                                      location__icontains=q3
                                      ).order_by('-id')
        return Job.objects.all().order_by('-id')

    def get_context_data(self, *args, **kwargs):
        context = super(SearchJobView, self).get_context_data(*args, **kwargs)
        context['categories'] = Category.objects.all()
        return context


class UpdateJobView(SuccessMessageMixin ,UpdateView):
    model = Job
    template_name = 'jobs/update.html'
    form_class = UpdateJobForm
    success_message = "You updated your job!"

    def form_valid(self, form):
        form.instance.employer = self.request.user
        return super(UpdateJobView, self).form_valid(form)

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        if self.object.employer != request.user:
            return HttpResponseRedirect('/')
        return super(UpdateJobView, self).get(request, *args, **kwargs)

    def get_success_url(self):
        return reverse('jobs:single_job', kwargs={"pk":self.object.pk, "slug":self.object.slug})


class DeleteJobView(SuccessMessageMixin, DeleteView):
    model = Job
    success_url = '/'
    template_name = 'jobs/delete.html'

    def delete(self, request, *args, **kwargs):
        self.object = self.get_object()
        if self.object.employer == request.user:
            self.object.delete()
            return HttpResponseRedirect(self.success_url)
        else:
            return HttpResponseRedirect(self.success_url)

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        if self.object.employer != request.user:
            return HttpResponseRedirect('/')
        return super(DeleteJobView, self).get(request, *args, **kwargs)