from django.views.generic import ListView, TemplateView
from django.shortcuts import get_object_or_404
from django.http import HttpResponse, JsonResponse
from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
from django.contrib.auth.decorators import login_required
from django.template.loader import render_to_string
from django.db.models import Q
from django.core.exceptions import PermissionDenied

from .models import EditSubmission, PhotoSubmission

class ModeratorRequiredMixin(UserPassesTestMixin):
    def test_func(self):
        if not hasattr(self, 'request'):
            return False
        if not self.request.user.is_authenticated:
            return False
        return getattr(self.request.user, 'role', None) in ['MODERATOR', 'ADMIN', 'SUPERUSER']

    def handle_no_permission(self):
        if not self.request.user.is_authenticated:
            return super().handle_no_permission()
        raise PermissionDenied("You do not have moderator permissions.")

class DashboardView(LoginRequiredMixin, ModeratorRequiredMixin, TemplateView):
    template_name = 'moderation/dashboard.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['submissions'] = EditSubmission.objects.all().order_by('-created_at')[:10]
        return context

class EditSubmissionListView(LoginRequiredMixin, ModeratorRequiredMixin, ListView):
    template_name = 'moderation/edit_submission_list.html'
    context_object_name = 'submissions'
    
    def get_queryset(self):
        queryset = EditSubmission.objects.all().order_by('-created_at')
        
        status = self.request.GET.get('status')
        if status:
            queryset = queryset.filter(status=status)
            
        submission_type = self.request.GET.get('type')
        if submission_type:
            queryset = queryset.filter(submission_type=submission_type)
            
        content_type = self.request.GET.get('content_type')
        if content_type:
            queryset = queryset.filter(content_type__model=content_type)
            
        return queryset

class PhotoSubmissionListView(LoginRequiredMixin, ModeratorRequiredMixin, ListView):
    template_name = 'moderation/photo_submission_list.html'
    context_object_name = 'submissions'
    
    def get_queryset(self):
        queryset = PhotoSubmission.objects.all().order_by('-created_at')
        
        status = self.request.GET.get('status')
        if status:
            queryset = queryset.filter(status=status)
            
        return queryset

@login_required
def submission_list(request):
    """HTMX endpoint for filtered submission list"""
    if not request.user.role in ['MODERATOR', 'ADMIN', 'SUPERUSER']:
        return HttpResponse(status=403)
        
    status = request.GET.get('status')
    submission_type = request.GET.get('type')
    content_type = request.GET.get('content_type')
    
    queryset = EditSubmission.objects.all().order_by('-created_at')
    
    if status:
        queryset = queryset.filter(status=status)
    if submission_type:
        queryset = queryset.filter(submission_type=submission_type)
    if content_type:
        queryset = queryset.filter(content_type__model=content_type)
    
    context = {
        'submissions': queryset
    }
    
    html = render_to_string('moderation/partials/submission_list.html', context, request=request)
    return HttpResponse(html)

@login_required
def approve_submission(request, submission_id):
    """HTMX endpoint for approving a submission"""
    if not request.user.role in ['MODERATOR', 'ADMIN', 'SUPERUSER']:
        return HttpResponse(status=403)
        
    submission = get_object_or_404(EditSubmission, id=submission_id)
    notes = request.POST.get('notes', '')
    
    try:
        submission.approve(request.user)
        if notes:
            submission.notes = notes
            submission.save()
        
        context = {'submission': submission}
        html = render_to_string('moderation/partials/submission_list.html', context, request=request)
        return HttpResponse(html)
    except ValueError as e:
        return HttpResponse(str(e), status=400)

@login_required
def reject_submission(request, submission_id):
    """HTMX endpoint for rejecting a submission"""
    if not request.user.role in ['MODERATOR', 'ADMIN', 'SUPERUSER']:
        return HttpResponse(status=403)
        
    submission = get_object_or_404(EditSubmission, id=submission_id)
    notes = request.POST.get('notes', '')
    
    submission.reject(request.user)
    if notes:
        submission.notes = notes
        submission.save()
    
    context = {'submission': submission}
    html = render_to_string('moderation/partials/submission_list.html', context, request=request)
    return HttpResponse(html)

@login_required
def escalate_submission(request, submission_id):
    """HTMX endpoint for escalating a submission"""
    if not request.user.role == 'MODERATOR':
        return HttpResponse(status=403)
        
    submission = get_object_or_404(EditSubmission, id=submission_id)
    notes = request.POST.get('notes', '')
    
    submission.escalate(request.user)
    if notes:
        submission.notes = notes
        submission.save()
    
    context = {'submission': submission}
    html = render_to_string('moderation/partials/submission_list.html', context, request=request)
    return HttpResponse(html)

@login_required
def approve_photo(request, submission_id):
    """HTMX endpoint for approving a photo submission"""
    if not request.user.role in ['MODERATOR', 'ADMIN', 'SUPERUSER']:
        return HttpResponse(status=403)
        
    submission = get_object_or_404(PhotoSubmission, id=submission_id)
    notes = request.POST.get('notes', '')
    
    try:
        submission.approve(request.user, notes)
        context = {'submission': submission}
        html = render_to_string('moderation/partials/photo_submission.html', context, request=request)
        return HttpResponse(html)
    except Exception as e:
        return HttpResponse(str(e), status=400)

@login_required
def reject_photo(request, submission_id):
    """HTMX endpoint for rejecting a photo submission"""
    if not request.user.role in ['MODERATOR', 'ADMIN', 'SUPERUSER']:
        return HttpResponse(status=403)
        
    submission = get_object_or_404(PhotoSubmission, id=submission_id)
    notes = request.POST.get('notes', '')
    
    submission.reject(request.user, notes)
    context = {'submission': submission}
    html = render_to_string('moderation/partials/photo_submission.html', context, request=request)
    return HttpResponse(html)