<?php

namespace Httpcb\OAuth\Adapter;

use League\OAuth2\Client\Provider\AbstractProvider,
    League\OAuth2\Client\Token\AccessToken;

class League implements AdapterInterface
{
    /**
     * @var AbstractProvider
     */
    protected $_provider;

    /**
     * @var AccessToken
     */
    protected $_accessToken;

    /**
     * {@inheritDoc}
     * @throws Exception
     */
    public function __construct($provider_name, $options)
    {
        $provider_name = ucfirst($provider_name);

        $className = 'League\OAuth2\Client\Provider\\' . $provider_name;
        $provider = new $className($options);

        if (!($provider instanceof AbstractProvider)) {
            // TODO: Throw a better exception class :)
            throw new Exception("Provider object must be an instance of League\\OAuth2\\Client\\Provider\\AbstractProvider");
        }

        $this->_provider = $provider;
    }

    /**
     * {@inheritDoc}
     */
    public function getProviderName()
    {
        return (new \ReflectionClass($this->_provider))->getShortName();
    }

    /**
     * {@inheritDoc}
     */
    public function getAuthorizationUrl()
    {
        return $this->_provider->getAuthorizationUrl();
    }

    /**
     * {@inheritDoc}
     */
    public function fetchAccessToken($code)
    {
        $this->_accessToken = $this->_provider->getAccessToken('authorization_code', [
            'code' => $code
        ]);
    }

    /**
     * {@inheritDoc}
     */
    public function getResourceData()
    {
        $resource = $this->_provider->getResourceOwner($this->_accessToken);
        return $resource->toArray();
    }
}