<?php
/**
 * Authserver, an OAuth2-based single-signon authentication provider written in PHP.
 *
 * Copyright (C) $today.date  Lars Vierbergen
 *
 * his program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
namespace vierbergenlars\AuthserverOAuthAccountBundle\ResourceOwner;

use vierbergenlars\AuthserverExternalAccountBundle\Entity\ExternalUser;

class ResourceOwnerMap implements \ArrayAccess, \IteratorAggregate
{

    private $config;

    public function __construct(array $config)
    {
        $this->config = $config;
    }

    /**
     *
     * @param ExternalUser $externalUser
     * @throws \InvalidArgumentException
     * @return ResourceOwnerConfig
     */
    public function getOwnerFromExternalUser(ExternalUser $externalUser)
    {
        $provider = $externalUser->getProvider();
        if (strpos($provider, 'oauth_') !== 0)
            throw new \InvalidArgumentException(sprintf('External user provider should start with "oauth_", got "%s"', $provider));

        $name = substr($provider, strlen('oauth_'));
        return $this->offsetGet($name);
    }

    public function offsetExists($offset)
    {
        return isset($this->config[$offset]);
    }

    public function offsetGet($offset)
    {
        if (!$this->offsetExists($offset))
            throw new \OutOfBoundsException(sprintf('Resource owner "%s" does not exist.', $offset));
        if (!$this->config[$offset] instanceof ResourceOwnerConfig)
            $this->config[$offset] = new ResourceOwnerConfig($this->config[$offset]);
        return $this->config[$offset];
    }

    public function offsetSet($offset, $value)
    {
        throw new \LogicException(sprintf('%s is frozen.', self::class));
    }

    public function offsetUnset($offset)
    {
        throw new \LogicException(sprintf('%s is frozen.', self::class));
    }

    public function getIterator()
    {
        return new ResourceOwnerMapIterator($this, array_keys($this->config));
    }
}