<?php
namespace App\CMS\Helpers;

use App\Models\Widgets\WidgetArea;
use Illuminate\Support\Facades\Cache;

class WidgetAreas
{
    /**
     * @var array list of inicialized widget areas
     */
    protected static $widgetAreas = [];
    protected static $initialized = false;

    protected static function saveRenderedWidgetArea($widgets)
    {
        foreach ($widgets as $widget) {
            if (!isset(self::$widgetAreas[$widget->widget_area_code])) {
                self::$widgetAreas[$widget->widget_area_code] = '';
            }

            self::$widgetAreas[$widget->widget_area_code] .= Widget::render($widget);
        }
    }

    protected static function loadWidgetArea($uniqueCode)
    {
        $widgets = Cache::remember('widget-' . $uniqueCode, setting('widgetCacheLifetime', 5), function () use ($uniqueCode) {
            $widgetArea = new WidgetArea();
            return $widgetArea->getWidgets($uniqueCode)
                              ->get();
        });

        WidgetArea::where('code', $uniqueCode)
                  ->increment('viewed');

        self::saveRenderedWidgetArea($widgets);
    }

    protected static function initWidgetAreas()
    {
        if (self::$initialized) {
            return;
        }

        $widgets = Cache::remember('widgets', setting('widgetCacheLifetime', 5), function () {
            $widgetArea = new WidgetArea();
            return $widgetArea->getWidgets()
                              ->get();
        });

        self::saveRenderedWidgetArea($widgets);
        self::$initialized = true;
    }

    /**
     * Renderer for whole widget area.
     *
     * @param $uniqueCode
     *
     * @return mixed
     */
    public static function render($uniqueCode)
    {
        if (!self::$initialized) {
            self::initWidgetAreas();
        }

        if (!isset(self::$widgetAreas[$uniqueCode])) {
            self::loadWidgetArea($uniqueCode);
        }

        echo isset(self::$widgetAreas[$uniqueCode]) ? self::$widgetAreas[$uniqueCode] : null;
    }
}