from django.shortcuts import render
from django.urls import reverse_lazy, reverse
from django.views.generic.base import TemplateView
from django.views.generic.edit import FormView, CreateView, UpdateView, DeleteView
from django.views.generic.detail import DetailView
from django.views.generic.list import ListView
from django.contrib.auth.mixins import LoginRequiredMixin


from django.db.models import (Exists, OuterRef,
    Prefetch, Subquery, Count, Sum, F, Q, Value)
from django.db.models.functions import Length, Upper

from .models import Employee, LogEntry, Todo, Event
from .forms import (
    EmployeeForm, 
    EmployeePreCreateForm, 
    EmployeeArchiveForm,
    LogEntryForm,
    TodoForm, 
    TodoCreateForm,
    EventForm,
    )

class SearchResultsView(ListView):
    model = Employee
    template_name_suffix = '_search_results'

    def get_queryset(self):
        query = self.request.GET.get('q')
        object_list = Employee.objects.filter(
            Q(first_name__icontains=query) | Q(last_name__icontains=query)
        )
        return object_list

# Employees
class EmployeeListView(LoginRequiredMixin, ListView):
    model = Employee
    queryset = Employee.objects.filter(archived=False).order_by('hire_date').annotate(
        todos_total=Count('todo'),
        todos_completed=Count('pk', filter=Q(todo__completed=True)),
        )

class EmployeeArchivedView(LoginRequiredMixin, ListView):
    model = Employee
    paginate_by = 100
    template_name_suffix = '_archived'
    queryset = Employee.objects.filter(archived=True)

class EmployeePreCreateView(LoginRequiredMixin, FormView):
    template_name = 'board/employee_pre_form.html'
    form_class = EmployeePreCreateForm

    def form_valid(self, form):
        form.filter_onboarding_email()
        return super().form_valid(form)

    def get_success_url(self):
        return reverse('employee-list')

class EmployeeCreateView(LoginRequiredMixin, CreateView):
    model = Employee
    template_name_suffix = '_create_form'
    form_class = EmployeeForm

class EmployeeDetailView(LoginRequiredMixin, DetailView):
    model = Employee

class EmployeeUpdateView(LoginRequiredMixin, UpdateView):
    model = Employee
    form_class = EmployeeForm
    success_url = reverse_lazy('employee-list')

class EmployeeArchiveView(LoginRequiredMixin, UpdateView):
    model = Employee
    form_class = EmployeeArchiveForm
    template_name_suffix = '_archive_form'
    success_url = reverse_lazy('employee-list')

class EmployeeDeleteView(LoginRequiredMixin, DeleteView):
    model = Employee
    success_url = reverse_lazy('employee-list')


# LogEntries
class LogEntryListView(LoginRequiredMixin, ListView):
    model = LogEntry
    pk_url_kwarg = 'entry_pk'

class LogEntryCreateView(LoginRequiredMixin, CreateView):
    model = LogEntry
    pk_url_kwarg = 'entry_pk'
    template_name_suffix = '_create_form'
    form_class = LogEntryForm

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['employee'] = Employee.objects.get(pk=self.kwargs['pk'])
        return context

    def form_valid(self, form):
        form.instance.employee = Employee.objects.get(pk=self.kwargs['pk'])
        return super().form_valid(form)

    def get_success_url(self):
        return reverse('employee-detail', kwargs={'pk': self.kwargs['pk']})

class LogEntryDetailView(LoginRequiredMixin, DetailView):
    model = LogEntry
    pk_url_kwarg = 'entry_pk'

class LogEntryUpdateView(LoginRequiredMixin, UpdateView):
    model = LogEntry
    pk_url_kwarg = 'entry_pk'
    form_class = LogEntryForm

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['employee'] = Employee.objects.get(pk=self.kwargs['pk'])
        return context

    def get_success_url(self):
        return reverse('employee-detail', kwargs={'pk': self.kwargs['pk']})

class LogEntryDeleteView(LoginRequiredMixin, DeleteView):
    model = LogEntry
    pk_url_kwarg = 'entry_pk'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['employee'] = Employee.objects.get(pk=self.kwargs['pk'])
        return context

    def get_success_url(self):
        return reverse('employee-detail', kwargs={'pk': self.kwargs['pk']})


# Todos
class TodoListView(LoginRequiredMixin, ListView):
    model = Todo
    pk_url_kwarg = 'todo_pk'

class TodoCreateView(LoginRequiredMixin, CreateView):
    model = Todo
    pk_url_kwarg = 'todo_pk'
    template_name_suffix = '_create_form'
    form_class = TodoCreateForm

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['employee'] = Employee.objects.get(pk=self.kwargs['pk'])
        return context

    def form_valid(self, form):
        form.instance.employee = Employee.objects.get(pk=self.kwargs['pk'])
        return super().form_valid(form)

    def get_success_url(self):
        return reverse('employee-detail', kwargs={'pk': self.kwargs['pk']})

class TodoDetailView(LoginRequiredMixin, DetailView):
    model = Todo
    pk_url_kwarg = 'todo_pk'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['employee'] = Employee.objects.get(pk=self.kwargs['pk'])
        return context

class TodoUpdateView(LoginRequiredMixin, UpdateView):
    model = Todo
    pk_url_kwarg = 'todo_pk'
    form_class = TodoForm

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['employee'] = Employee.objects.get(pk=self.kwargs['pk'])
        return context

class TodoDeleteView(LoginRequiredMixin, DeleteView):
    model = Todo
    pk_url_kwarg = 'todo_pk'
    
    def get_success_url(self):
        return reverse('todo-deleted', kwargs={'pk': self.kwargs['pk']})

class TodoDeleteDoneView(LoginRequiredMixin, TemplateView):
    template_name = 'board/item_deleted.html'


# Events
class EventListView(LoginRequiredMixin, ListView):
    model = Event
    paginate_by = 100
    ordering = ('-date', '-time')

class EventCreateView(LoginRequiredMixin, CreateView):
    model = Event
    template_name_suffix = '_create_form'
    form_class = EventForm
    success_url = reverse_lazy('profile-detail')

class EventDetailView(LoginRequiredMixin, DetailView):
    model = Event

class EventUpdateView(LoginRequiredMixin, UpdateView):
    model = Event
    form_class = EventForm

class EventDeleteView(LoginRequiredMixin, DeleteView):
    model = Event
    success_url = reverse_lazy('profile-detail')