<?php
namespace Templates\Base\OnePage\Handlers;

use App\Handlers\Contracts\TemplateHandler;
use App\Helpers\PageRenderer;
use App\Helpers\Settings;
use App\Helpers\Template;
use App\Models\ActionLogType;
use App\Models\Content;
use App\Models\Module;
use App\Models\Settings as SettingsModel;
use App\Models\User;
use Illuminate\Support\Facades\Auth;

abstract class OnePage implements TemplateHandler
{
    /**
     * Name of settings key for list of pages used on homepage
     */
    const HOMEPAGE_PAGES_SETTINGS_KEY = 'template.onepage.homepagePages';
    protected static $homepagePagesInitialized = false;
    protected static $homepagePages;

    /**
     * Register admin menu (or multiple ones)
     *
     * This cannot be in ServiceProvider because Session is started at middleware. And ServiceProvider is called before
     * starting any middleware..
     *
     * @param User $user model of logged user
     */
    public static function registerAdminMenu(User $user)
    {
        $menu = \Menu::instance('mainMenu');
        $menu->route('template.setHomepage', trans('template::admin/mainMenu.setHomepage'), [], 1, ['icon' => 'fa fa-fw fa-home']);
    }

    /**
     * Getter for pages displayed on homepage
     *
     * @return array
     */
    public static function getPagesOnHomepage()
    {
        if (!self::$homepagePagesInitialized) {
            $pageIds = (array)json_decode(Settings::get(self::HOMEPAGE_PAGES_SETTINGS_KEY, '[]'));

            if (empty($pageIds)) {
                return [];
            }

            // get all available pages
            $pages = Content::whereIn('id', $pageIds);

            if (Auth::user()) {
                $pages = $pages->where('status', '!=', Content::STATUS_DRAFT);
            } else {
                $pages = $pages->where('status', Content::STATUS_PUBLIC);
            }

            self:: $homepagePages = $pages->get();

            self::$homepagePagesInitialized = true;
        }

        return self::$homepagePages;
    }

    /**
     * Prepare Content object to be rendered using Blade template
     *
     * @param Content $content
     *
     * @return array
     */
    public static function beforeRender(Content & $content)
    {
        if ($content->is_homepage) {
            $pages = self::getPagesOnHomepage();

            // create real content from pages
            $pagesRaw = $pagesInTemplates = [];
            foreach ($pages as $page) {
                // save pages as models only
                $pagesRaw[$page->url] = $page;

                // save rendered pages
                try {
                    $pagesInTemplates[$page->url] = PageRenderer::render($page)
                                                                ->render();
                } catch (\Exception $e) {
                    if (Auth::user()) {
                        $pagesInTemplates[$page->url] = view(Template::name('errors.cannotRender'), ['page' => $page])->render();
                    }
                }
            }

            // return pages into template
            return ['pagesHtml' => $pagesInTemplates, 'pagesRaw' => $pagesRaw];
        }

        return [];
    }

    /**
     * Install module
     */
    public static function install()
    {
        // register action log types

        $types = [
            [
                'string_id' => 'pageRemovedFromHomepage',
                'name'      => 'template::admin/setHomepage.events.names.removedPage',
                'value'     => 'template::admin/setHomepage.events.descriptions.removedPage',
            ],
            [
                'string_id' => 'pageAddedIntoHomepage',
                'name'      => 'template::admin/setHomepage.events.names.addedPage',
                'value'     => 'template::admin/setHomepage.events.descriptions.addedPage',
            ],

        ];
        foreach ($types as $type) {
            ActionLogType::create($type);
        }
    }

    /**
     * Uninstall template
     *
     * @param Module $template
     */
    public static function uninstall(Module $template)
    {
        // delete action log types
        ActionLogType::whereIn('string_id', ['pageRemovedFromHomepage', 'pageAddedIntoHomepage'])
                     ->delete();

        // delete settings with pages on homepage
        SettingsModel::where('key', self::HOMEPAGE_PAGES_SETTINGS_KEY)
                     ->delete();
    }
}