<?php

namespace Templates\Base\OnePage\Http\Controllers\Admin;

use App\CMS\Contracts\Repositories\Content as IContent;
use App\CMS\Helpers\Settings;
use App\Http\Controllers\Admin\Controller;
use App\Models\Settings as SettingsModel;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Event;
use Mcamara\LaravelLocalization\Facades\LaravelLocalization;
use Templates\Base\OnePage\Events\AddPageIntoHomepage;
use Templates\Base\OnePage\Events\RemovePageFromHomepage;
use Templates\Base\OnePage\Handlers\OnePage;

class SetHomepage extends Controller
{
    /**
     * @var IContent
     */
    private $content;

    /**
     * SetHomepage constructor.
     *
     * @param Content $content
     */
    public function __construct(IContent $content)
    {
        parent::__construct();

        $this->content = $content;
    }

    /**
     * Display form for organizing pages on homepage
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function getPages()
    {
        // get pages which are assigned as homepage parts
        $usedPagesIds = (array)Settings::getJson(OnePage::HOMEPAGE_PAGES_SETTINGS_KEY);

        // get all pages - they will be separated for used and not used on next lines
        $allPages = $this->content->getOverview()
                                  ->get();

        // separate pages to used and not used - with help of $usedPAgesIds array defined above
        $pages = $used = $notUsed = [];
        $homepage = null;
        foreach ($allPages as $page) {

            if ($page->isHomepage) {
                $homepage = $page;
                continue;
            }

            $pages[$page->id] = $page;

            if (in_array($page->id, $usedPagesIds)) {
                $used[$page->id] = $page;
            } else {
                $notUsed[$page->id] = $page;
            }
        }

        return view('template::admin/homepage.set', [
            'usedPagesIds' => $usedPagesIds,
            'allPages'     => $pages,
            'usedPages'    => $used,
            'notUsedPages' => $notUsed,
            'homepage'     => $homepage
        ]);
    }

    /**
     * Add page into homepage
     *
     * @param $id
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function addPage($id)
    {
        $page = $this->content->getOne($id);

        if ($page->isHomepage) {
            return redirect()
                ->back()
                ->with('error', trans('template::admin/setHomepage.cannotSetHomepageAsPartOfHomepage'));
        }

        // try to get page config
        $settingsEntry = SettingsModel::firstOrCreate([
                                                          'language' => LaravelLocalization::getCurrentLocale(),
                                                          'key'      => OnePage::HOMEPAGE_PAGES_SETTINGS_KEY
                                                      ]);
        $usedPagesIds = (array)json_decode($settingsEntry->value);

        // add page into list of used pages - if not already there
        if (!in_array($id, $usedPagesIds)) {
            $usedPagesIds[] = $id;
        }

        $settingsEntry->value = json_encode($usedPagesIds);
        $settingsEntry->save();

        Cache::forget('settings');

        // inform other application parts about this event
        Event::fire(new AddPageIntoHomepage($page));

        return redirect()
            ->back()
            ->with('success', trans('template::admin/setHomepage.successfullyAdded'));
    }

    /**
     * Remove page from homepage
     *
     * @param $id
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function removePage($id)
    {
        $pages = (array)Settings::getJson(OnePage::HOMEPAGE_PAGES_SETTINGS_KEY);

        $page = $this->content->getOne($id);

        if (!in_array($id, $pages)) {
            return redirect()
                ->back()
                ->with('error', trans('template::admin/setHomepage.invalidPageId'));
        } else {
            $pagePosition = array_search($id, $pages);

            // remove page from config array
            unset($pages[$pagePosition]);

            $pages = array_values($pages);

            // update in database
            $val = SettingsModel::where('key', OnePage::HOMEPAGE_PAGES_SETTINGS_KEY)
                         ->where('language', LaravelLocalization::getCurrentLocale())
                         ->update(['value' => json_encode($pages)]);

            Cache::forget('settings');

            // inform other application parts about this event
            Event::fire(new RemovePageFromHomepage($page));

            return redirect()
                ->back()
                ->with('success', trans('template::admin/setHomepage.successfullyRemoved'));
        }
    }
}