class Container implements ArrayAccess {

    /**
     * Container bindings
     * @var array
     */
    protected $bindings = array();

    /**
     * Container instances
     * @var array
     */
    protected $instances = array();

    /**
     * Container Closures
     * @var array
     */
    protected $closures = array();

    /**
     * Maximum depth of function makeClassWithParameters
     * @var int
     */
    protected $maxdepth = 10;

    // ================================================== //

    /**
     * Public function to create new binding.
     *
     * @param string $key Binding name
     * @param mixed $value Object to store
     * @param bool $singleton Store as singleton?
     * @return void
     */
    public function bind($key, $value, $singleton = false)
    {
        $this->clearBind($key);

        $this->makeBind($key, $value, (bool)$singleton);
    }

    /**
     * Function to get stored object or create new to store.
     * If there's no stored object it will create new instance of
     * class which name is $key
     *
     * @param string $key Binding name or class name
     * @param array $parameters Parameters for new class
     * @param bool $singleton Store new class as singleton?
     * @return mixed
     */
    public function make($key, $parameters = array(), $singleton = false)
    {
        if($bind = $this->getBind($key))
        {
            if(isset($bind['type']) and $bind['type'] == 'closure')
            {
                $instance = $this->closures[$key];
                $instance = $instance();

                if(isset($bind['singleton']) and $bind['singleton'] == true)
                {
                    $this->clearBind($key);

                    $this->makeBind($key, $instance, true);
                }

                return $instance;
            }
            elseif(isset($bind['type']) and $bind['type'] == 'instance')
            {
                return $this->instances[$key];
            }

            $this->clearBind($key);
            return false;
        }
        else
        {
            $instance = $this->makeClassWithParameters($key, (array)$parameters);

            if($instance != false)
            {
                $this->bind($key, $instance);
            }

            return $instance;
        }
    }

    // ================================================== //

    /**
     * Creating new class with parameters.
     * If new class constructor require another class as parameter
     * it will be created, but max depth is limited!
     *
     * @throws OutOfBoundsException
     * @uses ReflectionClass
     *
     * @param string $name Class name
     * @param array $params Class parameters
     * @param int $depth Depth counter
     * @return mixed
     */
    protected function makeClassWithParameters($name, array $params, $depth = 1)
    {
        if($depth >= $this->maxdepth)
        {
            throw new OutOfBoundsException('Maximum depth of makeClassWithParameters is '.$this->maxdepth);
            return false;
        }

        if(class_exists($name))
        {
            $class = new ReflectionClass($name);

            $constructor = $class->getConstructor();

            if(!is_null($constructor) and empty($params))
            {
                foreach($constructor->getParameters() as $paramdata)
                {
                    $classparam = $paramdata->getClass();

                    if(is_null($classparam))
                    {
                        if($paramdata->isOptional())
                        {
                            $params[] = $paramdata->getDefaultValue();
                        }
                        else
                        {
                            $params[] = null;
                        }
                    }
                    else
                    {
                        $params[] = $this->makeClassWithParameters($classparam->name, array(), $depth+1);
                    }
                }
            }

            return $class->newInstanceArgs($params);
        }
        else
        {
            return false;
        }
    }

    /**
     * Getting bind if exist
     *
     * @return mixed
     */
    protected function getBind($key)
    {
        return isset($this->bindings[$key]) ? $this->bindings[$key] : false;
    }

    /**
     * Protected function to create new binding.
     *
     * @param string $key Binding name
     * @param mixed $value Object to store
     * @param bool $singleton Store as singleton?
     * @return void
     */
    protected function makeBind($key, $value, $singleton)
    {
        $bind = array();

        if($value instanceof Closure)
        {
            $bind['type'] = 'closure';
            $bind['singleton'] = (bool)$singleton;
            $this->closures[$key] = $value;
        }
        else
        {
            $bind['type'] = 'instance';
            $this->instances[$key] = $value;
        }

        $this->bindings[$key] = $bind;
    }

    /**
     * Clear existing binding
     *
     * @param string $key Binding name
     * @return void
     */
    protected function clearBind($key)
    {
        unset($this->bindings[$key], $this->instances[$key], $this->closures[$key]);
    }

    // ================================================== //

    /**
     * Getting container content as array
     *
     * @param string $key Binding name
     * @return mixed
     */
    public function offsetGet($key)
    {
        return $this->make($key);
    }

    /**
     * Set container content as array
     *
     * @param string $key Binding name
     * @param mixed $value Object to store
     * @return void
     */
    public function offsetSet($key, $value)
    {
        if(!($value instanceof Closure))
        {
            $value = function() use ($value) {
                return $value;
            };
        }

        $this->bind($key, $value, false);
    }

    /**
     * Checking binding as container array
     *
     * @param string $key Binding name
     * @return bool
     */
    public function offsetExists($key)
    {
        return isset($this->bindings[$key]);
    }

    /**
     * Using function unset for container as array
     *
     * @param string $key Binding name
     * @return void
     */
    public function offsetUnset($key)
    {
        $this->clearBind($key);
    }

    /**
     * Magic method __get
     *
     * @param string $key
     * @return mixed
     */
    public function __get($key)
    {
        return $this[$key];
    }

    /**
     * Magic method __set
     *
     * @param string $key
     * @param mixed $value
     * @return void
     */
    public function __set($key, $value)
    {
        $this[$key] = $value;
    }

}