<?php
namespace App\CMS\Shortcodes;

use App\Models\Widgets\Widget as WidgetModel;
use Mcamara\LaravelLocalization\Facades\LaravelLocalization;

class Widget
{
    protected static $widgets = [];
    protected static $initialized = false;

    protected function getRenderedWidget(WidgetModel $widget)
    {
        $widget->settings = json_decode($widget->settings);

        $handler = $widget->widget_type_handler;
        $presenter = call_user_func([$handler, 'getPresenter']);

        return call_user_func([$presenter, 'render'], $widget);
    }

    /**
     * Load one widget from database
     *
     * @param $containerId
     */
    protected function loadWidget($containerId)
    {
        $widget = WidgetModel::where('container_id', $containerId)
                             ->first();

        if (!$widget) {
            return;
        }

        $widget->timestamps = false;
        $widget->viewed++;
        $widget->save();
        $widget->timestamps = true;

        self::$widgets[$containerId] = $this->getRenderedWidget($widget);
    }

    /**
     * Load all frequently used widgets
     *
     * Frequency of loaded widgets is counted only using direct loading, widgets displayed in widget areas are omitted
     */
    protected function initWidgets()
    {
        if (self::$initialized) {
            return;
        }

        $widgets = WidgetModel::where('viewed', '>=', setting('preloadFrequentedWidgetsTreshold', 10))
                              ->where('language', LaravelLocalization::getCurrentLocale())
                              ->get();

        foreach ($widgets as $widget) {
            self::$widgets[$widget->container_id] = $this->getRenderedWidget($widget);
        }

        self::$initialized = true;
    }

    /**
     * Register new shortcode
     *
     * Initfrequently used widgets and if not presented yet - load desired widget specified as content of shortcode
     *
     * @param $shortcode
     * @param $containerId
     * @param $compiler
     * @param $name
     *
     * @return mixed
     */
    public function register($shortcode, $containerId, $compiler, $name)
    {
        $this->initWidgets();

        if (!isset(self::$widgets[$containerId])) {
            $this->loadWidget($containerId);
        }

        return self::$widgets[$containerId];
    }
}