<?php
namespace Smallnest\Bsky;

require_once('config.php');
require_once('vendor/autoload.php');

use chillerlan\OAuth\Core\OAuth2Interface;
use chillerlan\OAuth\Core\OAuth2Provider;
use chillerlan\OAuth\Core\PARTrait;
use chillerlan\OAuth\Core\PKCETrait;
use chillerlan\OAuth\OAuthOptions;
use chillerlan\OAuth\Storage\SessionStorage;
use GuzzleHttp\Client;
use GuzzleHttp\Psr7\HttpFactory;

class BskyProvider extends OAuth2Provider implements \chillerlan\OAuth\Core\PAR, \chillerlan\OAuth\Core\PKCE {
  use \chillerlan\OAuth\Core\PARTrait;
  use \chillerlan\OAuth\Core\PKCETrait;
  
	public const IDENTIFIER               = 'BSKYPROVIDER';
  public const SCOPE_ATPROTO            = 'atproto';
  public const SCOPE_TRANSITION_GENERIC = 'transition:generic';
  public const AUTH_METHOD              = self::AUTH_METHOD_HEADER;

	protected string $authorizationURL = 'https://bsky.app/oauth/authorize';
	protected string $accessTokenURL   = 'https://bsky.app/oauth/token';
	protected string $apiURL           = 'https://bsky.app/xrpc';
  protected string $parAuthorizationURL = 'https://bsky.app/oauth/par';
  
  public const DEFAULT_SCOPES = [
  		self::SCOPE_ATPROTO,
  		self::SCOPE_TRANSITION_GENERIC,
  	];

  public function setPds(UriInterface|string $pds):static{
		if(!$pds instanceof UriInterface){
			$pds = $this->uriFactory->createUri($pds);
		}

		// throw if the host is empty
		if($pds->getHost() === ''){
			throw new OAuthException('invalid PDS URL');
		}

		// enforce https and remove unnecessary parts
		$pds = $pds->withScheme('https')->withQuery('')->withFragment('');

		// set the provider URLs
		$this->authorizationURL = (string)$pds->withPath('/oauth/authorize');
		$this->accessTokenURL   = (string)$pds->withPath('/oauth/token');
		$this->apiURL           = (string)$pds->withPath('/xrpc');
    $this->parAuthorizationURL = (string)$pds->withPath('/oauth/par');
    
		return $this;
	}
}
?>