<?php

namespace App\Http\Controllers\API;

use Illuminate\Http\Request;
use App\Topic;
use App\Http\Resources\TopicResource;
use Illuminate\Http\JsonResponse;
use App\Http\Resources\ArticleResource;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Cache;

class TopicsAPIController extends Controller
{
    /**
     * Discover Topics
     * 
     *  Take Random 14 Topics from Database
     *
     */
    public function index()
    {
        return TopicResource::collection(Topic::inRandomOrder()->take(12)->get());
    }

    /**
     *  Load all the articles for a given topics
     *
     * @param  mixed $topic
     */
    public function show(Topic $topic)
    {
        $currentPage = request()->get('page',1);
        return Cache::remember($topic->slug. '_'.$currentPage, 300, function () use ($topic) {
            return response()->json([
                'topic' => new TopicResource($topic),
                'articles' => $topic->articles()->with('source')->latest('published_date')->paginate(12)
            ]);
        });
    }
}