<?php

namespace App\Http\Controllers\Admin;

use App\Facades\Utils;
use App\Interfaces\Controller;
use App\Repositories\NewsRepository;
use App\Repositories\PirepRepository;
use App\Repositories\UserRepository;
use Auth;
use Flash;
use Illuminate\Http\Request;
use Log;
use Version;
use vierbergenlars\SemVer\version as semver;

/**
 * Class DashboardController
 */
class DashboardController extends Controller
{
    private $newsRepo;
    private $pirepRepo;
    private $userRepo;

    /**
     * DashboardController constructor.
     *
     * @param NewsRepository  $newsRepo
     * @param PirepRepository $pirepRepo
     * @param UserRepository  $userRepo
     */
    public function __construct(
        NewsRepository $newsRepo,
        PirepRepository $pirepRepo,
        UserRepository $userRepo
    ) {
        $this->newsRepo = $newsRepo;
        $this->pirepRepo = $pirepRepo;
        $this->userRepo = $userRepo;
    }

    /**
     * Check if a new version is available by checking the VERSION file from
     * S3 and then using the semver library to do the comparison. Just show
     * a session flash file on this page that'll get cleared right away
     *
     * @throws \GuzzleHttp\Exception\GuzzleException
     */
    protected function checkNewVersion()
    {
        try {
            $current_version = new semver(Version::compact());
            $latest_version = new semver(Utils::downloadUrl(config('phpvms.version_file')));

            if (semver::gt($latest_version, $current_version)) {
                Flash::warning('New version '.$latest_version.' is available!');
            }
        } catch (\Exception $e) {
            Log::error($e->getMessage());
            Flash::warning('Could not contact phpVMS for version check');
        }
    }

    /**
     * Show the admin dashboard
     *
     * @param Request $request
     *
     * @throws \GuzzleHttp\Exception\GuzzleException
     * @throws \GuzzleHttp\Exception\GuzzleException
     *
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function index(Request $request)
    {
        $this->checkNewVersion();

        return view('admin.dashboard.index', [
            'news'           => $this->newsRepo->getLatest(),
            'pending_pireps' => $this->pirepRepo->getPendingCount(),
            'pending_users'  => $this->userRepo->getPendingCount(),
        ]);
    }

    /**
     * @param Request $request
     *
     * @throws \Prettus\Validator\Exceptions\ValidatorException
     *
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function news(Request $request)
    {
        if ($request->isMethod('post')) {
            $attrs = $request->post();
            $attrs['user_id'] = Auth::user()->id;

            $this->newsRepo->create($attrs);
        } elseif ($request->isMethod('delete')) {
            $news_id = $request->input('news_id');
            $this->newsRepo->delete($news_id);
        }

        return view('admin.dashboard.news', [
            'news' => $this->newsRepo->getLatest(),
        ]);
    }
}