from django.http import JsonResponse, HttpResponse
from django.shortcuts import get_object_or_404, render
from django.apps import apps
from django.core.exceptions import ImproperlyConfigured

def items(request, ac_name):
    """Return autocomplete items for a given autocomplete class."""
    try:
        # Get the autocomplete class from the registry
        ac_class = apps.get_app_config('autocomplete').get_autocomplete_class(ac_name)
        if not ac_class:
            raise ImproperlyConfigured(f"No autocomplete class found for {ac_name}")
        
        # Create instance and get results
        ac = ac_class()
        search = request.GET.get('search', '')
        
        # Check minimum search length
        if len(search) < ac.minimum_search_length:
            return HttpResponse('')
        
        # Get and format results
        results = ac.get_search_results(search)[:ac.max_results]
        formatted_results = [ac.format_result(obj) for obj in results]
        
        # Render suggestions template
        return render(request, 'autocomplete/suggestions.html', {
            'results': formatted_results
        })
    except Exception as e:
        return HttpResponse(str(e), status=400)

def toggle(request, ac_name):
    """Toggle selection state for an autocomplete item."""
    try:
        # Get the autocomplete class from the registry
        ac_class = apps.get_app_config('autocomplete').get_autocomplete_class(ac_name)
        if not ac_class:
            raise ImproperlyConfigured(f"No autocomplete class found for {ac_name}")
        
        # Create instance and handle toggle
        ac = ac_class()
        item_id = request.POST.get('id')
        if not item_id:
            raise ValueError("No item ID provided")
        
        # Get the object and format it
        obj = get_object_or_404(ac.model, pk=item_id)
        result = ac.format_result(obj)
        return JsonResponse(result)
    except Exception as e:
        return JsonResponse({'error': str(e)}, status=400)