<?php

declare(strict_types=1);

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Services\Recommendations\RecommendationFeedResolver;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

final class FeedEngineDecisionController extends Controller
{
    public function __construct(private readonly RecommendationFeedResolver $feedResolver) {}

    public function index(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'user_id' => ['required', 'integer', 'exists:users,id'],
            'algo_version' => ['nullable', 'string', 'max:64'],
        ]);

        $userId = (int) $validated['user_id'];
        $algoVersion = isset($validated['algo_version']) ? (string) $validated['algo_version'] : null;

        return response()->json([
            'meta' => [
                'generated_at' => now()->toISOString(),
            ],
            'decision' => $this->feedResolver->inspectDecision($userId, $algoVersion),
        ], Response::HTTP_OK);
    }
}