<?php

namespace AlexLcDee\RegistryContainer;


class Registry implements RegistryInterface
{
    /**
     * @var Registry
     */
    private static $instance;

    /**
     * @var CategoriesContainer
     */
    private $container;

    private function __construct($typesMap)
    {
        $this->container = new CategoriesContainer();
        foreach ($typesMap as $category => $type) {
            $this->container->set($category, new ItemsContainer($type));
        }
    }

    public static function init($typesMap)
    {
        if(static::$instance !== null) {
            throw new RegistryException('Registry can be initialized only once.');
        }
        static::$instance = new static($typesMap);
        return static::$instance;
    }

    /**
     * @param string $category
     * @param RegistrableItem $item
     * @throws RegistryException
     */
    public static function add($category, RegistrableItem $item)
    {
        if (!static::$instance->container->contains($category)) {
            throw new RegistryException(strtr('Registry does not contain category "{category}"', [
                '{category}' => $category
            ]));
        }
        static::$instance->container->get($category)->add($item);
    }

    /**
     * @param string $category
     * @return ItemsContainer
     * @throws RegistryException
     */
    public static function get($category)
    {
        if (!static::$instance->container->contains($category)) {
            throw new RegistryException(strtr('Registry does not contain category "{category}"', [
                '{category}' => $category
            ]));
        }
        return static::$instance->container->get($category);
    }
}