<?php

namespace App\Http\Controllers\Chatbot;

use App\Actions\Chatbot\AskQuestionAction;
use App\Http\Controllers\Controller;
use App\Http\Requests\Chatbot\AskQuestionRequest;
use App\Models\Category;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;
use RuntimeException;

class ChatController extends Controller
{
    public function __construct(
        private readonly AskQuestionAction $askQuestionAction
    ) {}

    /**
     * Paparan chatbot UI.
     */
    public function index(Request $request): View
    {
        $categories     = Category::active()->ordered()->get();
        $selectedCatId  = $request->query('category_id');

        return view('chatbot.index', compact('categories', 'selectedCatId'));
    }

    /**
     * Endpoint untuk submit soalan.
     * Return JSON — AJAX call dari chatbot UI.
     */
    public function ask(AskQuestionRequest $request): JsonResponse
    {
        try {
            $result = $this->askQuestionAction->execute(
                $request->question,
                $request->category_id,
                $request
            );

            return response()->json([
                'success'       => true,
                'answer'        => $result['answer'],
                'has_answer'    => $result['has_answer'],
                'sources'       => $result['sources'],
                'session_token' => $result['session_token'],
            ]);
        } catch (RuntimeException $e) {
            return response()->json([
                'success' => false,
                'message' => 'Perkhidmatan AI tidak tersedia pada masa ini. Sila cuba sebentar lagi.',
                'error'   => config('app.debug') ? $e->getMessage() : null,
            ], 503);
        }
    }
}