<?php

use common\Config;
use common\Progaram;

/**
 * Class Container
 */
class Container
{

	/** @var Container */
	private static $_instance;

	/** @var \common\Config */
	private $config;

	private $container = [];

	const QQ_SMALL_PROGRAM = 'QQ_SMALL_PROGRAM';
	const QQ_LITTLE_GAME = 'QQ_LITTLE_GAME';
	const WX_LITTLE_GAME = 'WX_LITTLE_GAME';
	const WX_SMALL_PROGRAM = 'WX_SMALL_PROGRAM';
	const WX_OFFICIAL_ACCOUNT = 'WX_OFFICIAL_ACCOUNT';

	/**
	 * @param string $class
	 * @param Config $config
	 * @return mixed
	 */
	public static function newInstance($class, $config)
	{
		if (!(static::$_instance instanceof Container)) {
			static::$_instance = new Container();
		}
		static::$_instance->generate($config);

		if (static::$_instance->exists($class)) {
			return static::$_instance->get($class);
		} else {
			return static::$_instance->generate($config);
		}
	}

	/**
	 * @param \common\Config $config
	 * @return $this
	 */
	public function generate(Config $config)
	{
		$this->config = $config;
		return $this;
	}


	/**
	 * @param $class
	 * @return object|ReflectionClass
	 * @throws ReflectionException
	 * @throws Exception
	 */
	private function createObject($class)
	{
		$newInstance = new \ReflectionClass($class);
		if (!$newInstance->isInstantiable()) {
			throw new Exception('Class Con\'t instance.');
		}
		$newInstance = $newInstance->newInstance();
		if (method_exists($newInstance, 'initConfig')) {
			$newInstance->initConfig($this->config);
		}

		$this->container[$class] = $newInstance;
		return $newInstance;
	}


	/**
	 * @param $name
	 * @return mixed
	 */
	public function get($name)
	{
		return $this->container[$name];
	}

	/**
	 * @param $name
	 * @return bool
	 */
	public function exists($name)
	{
		return array_key_exists($name, $this->container) && $this->container[$name] instanceof Progaram;
	}

}