<?php
/**
 *
 *
 * @author      Komma <info@komma.pro>
 * @copyright   (c) 2012-2016, Komma
 */

namespace App\Komma\Kms\Core;

use App\Komma\Kms\Core\Sections\Section;
use App\Komma\Kms\Core\Tree\TreeService;
use App\Komma\Sites\SiteServiceInterface;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Routing\Controller;

class KmsController extends Controller
{
    Use AuthorizesRequests;

    /** @var SiteServiceInterface $siteService */
    protected $siteService;

    protected $user;

    /** @var Section */
    protected $section;

    /** @var string $forModelName For which model the controller does its job */
    protected $forModelName;

    /** @var TreeService $treeService  */
    protected $treeService;

    function __construct(Section $section)
    {
        //Authentication, check if the user is logged in
        $this->middleware('auth:kms');
        $this->validateForModel();
        $this->section = $section;
        $this->siteService = app(SiteServiceInterface::class);

        $this->treeService = app(TreeService::class);
        $this->treeService->setForModelName($this->forModelName);
        $this->treeService->setSectionService($this->section->getSectionService());
    }

    /**
     * Validate for model
     */
    private function validateForModel()
    {
        if(!$this->forModelName) throw new \RuntimeException('Make sure you set (override) the $forModelName property in the controller ('.get_class($this).') to the eloquent model the controller does it\'s job for.');
    }

    /**
     * Returns the section this controller works for
     *
     * @return Section
     */
    public function getSection()
    {
        return $this->section;
    }

    /**
     * Uses the siteService and the Tree service to create a root model if the model uses a tree algorithm
     */
    public function createRootTreeModelIfNeeded()
    {
        $currentSite = $this->siteService->getCurrentSite();

        //Also consider the root model as non existent when the site_id of all existing models is not the same as the current site_id.
        $constrainingClosure = function ($query) use($currentSite) {
            return $query->where('site_id', '=', $currentSite->id);
        };

        //Extra data to set on the root model when it needed to be created
        $extraModelDataForNewRoot = ['site_id' => $currentSite->id];

        $this->treeService->makeRootModelForModelnameIfNeeded($this->forModelName, $extraModelDataForNewRoot, $constrainingClosure);
    }
}