from django.views import View
from django.shortcuts import render
from django.http import JsonResponse
from .chatbot_logic import get_response
import json

class ChatbotView(View):
    """
    Class-based view to handle chatbot template rendering (GET)
    and GPT-4-based chatbot API responses (POST).
    """
    def get(self, request):
        """
        Render the chatbot interface template.
        """
        return render(request, "haikalbot/chatbot.html")

    def post(self, request):
        """
        Handle chatbot API requests and return responses as JSON.
        """
        try:
            # Parse JSON payload from the request body
            data = json.loads(request.body)
            user_message = data.get("message", "").strip()

            if not user_message:
                return JsonResponse({"error": "Message cannot be empty."}, status=400)

            # Get GPT-4 response
            chatbot_response = get_response(user_message)

            return JsonResponse({"response": chatbot_response}, status=200)
        except json.JSONDecodeError:
            return JsonResponse({"error": "Invalid JSON format."}, status=400)