<?php
error_reporting(E_ALL);
ini_set('display_errors', 'On');
ini_set('log_errors_max_len', '0');

require_once('vendor/autoload.php');
require_once('config.php');
require_once('lib/bskyToucher.php');
require_once('lib/bskyProvider.php');

use flight\Engine;
use League\CommonMark\CommonMarkConverter;
use React\Promise\Deferred;
use React\EventLoop\Loop;
use React\Promise\Promise;
use GuzzleHttp\Client;
use Tracy\Debugger;
use Tracy\OutputDebugger;
use Matrix\Async;
use GuzzleHttp\Psr7\HttpFactory;
use chillerlan\OAuth\OAuthOptions;
use DateTimeImmutable;
use Lcobucci\JWT\Builder;
use Lcobucci\JWT\JwtFacade;
use Lcobucci\JWT\Signer\Ecdsa\Sha256;
use Lcobucci\JWT\Signer\Key\InMemory;
use Smallnest\Bsky\BskyProvider;

$bskyToucher = new BskyToucher();

$favoriteFeeds = array_map(function ($feed) use ($bskyToucher) {
  return $bskyToucher->getFeedInfo($feed);
}, FAVORITE_FEEDS);

function getPostOgImage(object $post): ?string {
  if (!property_exists($post, 'embedType') || !$post->embedType) return null;
  
  if ($post->embedType === 'app.bsky.embed.images') {
    return $post->embeds[0]->imgUrl;
  } else if ($post->embedType === 'app.bsky.embed.external' || $post->embedType === 'app.bsky.embed.video') {
    return $post->embeds[0]->thumb;
  } else if ($post->embedType === 'app.bsky.embed.record') {
    return getPostOgImage($post->embeds[0]->post);
  }
  return null;
}

/*Debugger::enable();
// This where errors and exceptions will be logged. Make sure this directory exists and is writable.
Debugger::$logDirectory = __DIR__ . '/../log/';
//Debugger::$strictMode = true; // display all errors
// Debugger::$strictMode = E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED; // all errors except deprecated notices
if (Debugger::$showBar) {
    // This is specific to the Tracy Extension for Flight if you've included that
    // otherwise comment this out.
    //new TracyExtensionLoader($app);
}*/

Flight::set('frontpageFeed', FRONTPAGE_FEED);
Flight::set('slingshotInstance', SLINGSHOT_INSTANCE);
Flight::set('constellationInstance', CONSTELLATION_INSTANCE);
Flight::set('plcDirectory', PLC_DIRECTORY);
Flight::set('defaultPds', DEFAULT_PDS);
Flight::set('publicApi', PUBLIC_API);
Flight::set('frontpageFeed', FRONTPAGE_FEED);
Flight::set('defaultRelay', DEFAULT_RELAY);
Flight::set('userAuth', null);
Flight::set('flight.log_errors', false);
Flight::set('flight.handle_errors', false);
Flight::set('flight.content_length', false);

Flight::set('standardParams', [
  'siteTitle' => SITE_TITLE,
  'themes' => THEMES,
  'fonts' => FONTS,
  'setTheme' => array_key_exists('sbs_theme', $_COOKIE) ? $_COOKIE['sbs_theme'] : DEFAULT_THEME,
  'setFont' => array_key_exists('sbs_font', $_COOKIE) ? $_COOKIE['sbs_font'] : DEFAULT_FONT,
  'userAuth' => Flight::get('userAuth'),
  'favFeeds' => $favoriteFeeds,
  'pages' => PAGES,
  'links' => LINKS,
  'ogdomain' => 'https://'.SITE_DOMAIN
]);

Flight::route('/', function () {
  $bskyToucher = new BskyToucher();
  $posts = $bskyToucher->getFeed(Flight::get('frontpageFeed'));
  $feedInfo = $bskyToucher->getFeedInfo(Flight::get('frontpageFeed'));
  $latte = new Latte\Engine;
  $latte->render('./templates/home.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'home feed',
    'feedInfo' => $feedInfo,
    'posts' => array_map(function ($p) { return $p->post; }, $posts->feed),
    'cursor' => $posts->cursor,
    'feedAtUri' => FRONTPAGE_FEED,
    'ogtitle' => SITE_TITLE,
    'ogdesc' => SITE_DESC,
    'ogimage' => '',
    'ogurl' => 'https://'.SITE_DOMAIN.'/'
  ]));
});

Flight::route('/u/@handle:[a-z0-9\.]+/@rkey:[a-z0-9]+', function (string $handle, string $rkey): void {
  $bskyToucher = new BskyToucher();
  $did = $bskyToucher->resolveHandle($handle);
  $userInfo = $bskyToucher->getUserInfo($handle);
  $atUri = 'at://'.$did.'/app.bsky.feed.post/'.$rkey;
  $latte = new Latte\Engine;
  $latte->render('./templates/single.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'post',
    'post' => $atUri,
    'displayName' => $userInfo->displayName,
    'handle' => $handle,
    'ogtitle' => SITE_TITLE." | ".$userInfo->displayName." (@".$handle.")",
    'ogdesc' => '', //$post->content,
    'ogimage' => '', //getPostOgImage($post),
    'ogurl' => 'https://'.SITE_DOMAIN.'/u/'.$handle.'/'.$rkey
  ]));
});

Flight::route('/u/@handle:[a-z0-9\.]+(/@tab:[a-z]+)', function (string $handle, ?string $tab): void {
  $bskyToucher = new BskyToucher();
  $user = $bskyToucher->getUserInfo($handle, 'handle');
  $posts = $bskyToucher->getUserPosts($user->did);
  $latte = new Latte\Engine;
  $latte->render('./templates/profile.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'profile',
    'handle' => $handle,
    'posts' => array_map(function ($p) { return $p->uri; }, $posts->records),
    'cursor' => $posts->cursor,
    'user' => $user,
    'ogtitle' => SITE_TITLE." | ".$user->displayName." (@".$user->handle.")",
    'ogdesc' => $user->description,
    'ogimage' => $user->avatar,
    'ogurl' => 'https://'.SITE_DOMAIN.'/u/'.$user->handle.'/'
  ]));
});

Flight::route('/f/@did:did:plc:[0-9a-z]+/@name:[a-z0-9\-\_]+', function (string $did, string $name): void {
  $bskyToucher = new BskyToucher();
  $feedUrl = "at://".$did."/app.bsky.feed.generator/".$name;
  $feedInfo = $bskyToucher->getFeedInfo($feedUrl);
  $creatorInfo = $bskyToucher->getUserInfo($feedInfo->creatorDid, 'did');
  $posts = $bskyToucher->getFeed($feedUrl);
  $latte = new Latte\Engine;
  $latte->render('./templates/feed.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'feed',
    'posts' => array_map(function ($p) { return $p->post; }, $posts->feed),
    'cursor' => '',
    'feedName' => $feedInfo->title,
    'feedAvatar' => $feedInfo->avatar,
    'feedDescription' => $feedInfo->description,
    'feedAtUri' => $feedUrl,
    'feedAuthorName' => $creatorInfo->displayName,
    'feedAuthorHandle' => $creatorInfo->handle,
    'feedAuthorDid' => $creatorInfo->did,
    'feedAuthorPds' => $creatorInfo->pds,
    'ogtitle' => SITE_TITLE." | ".$feedInfo->title,
    'ogdesc' => $feedInfo->description,
    'ogimage' => $feedInfo->avatar,
    'ogurl' => 'https://'.SITE_DOMAIN.'/f/'.$did.'/'.$name
  ]));
});

Flight::route('/s', function (): void {
  $latte = new Latte\Engine;
  $latte->render('./templates/search.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'search',
    'params' => $_GET,
    'ogtitle' => SITE_TITLE." | search".(array_key_exists('s', $_GET) ? ': '.$_GET['s'] : ''),
    'ogdesc' => SITE_DESC,
    'ogimage' => '',
    'ogurl' => 'https://'.SITE_DOMAIN.'/u/'.$handle.'/'.$rkey
  ]));
});

Flight::route('/login', function(): void {
  $options = new OAuthOptions([
  	'key'          => 'https://'.SITE_DOMAIN.CLIENT_ID,
  	'secret'       => CLIENT_SECRET,
  	'callbackURL'  => 'http://127.0.0.1/login',
  	'sessionStart' => true,
  ]);
  $connector = new React\Socket\Connector([
    'dns' => '1.1.1.1'
  ]);
  $http = new React\Http\Browser($connector);
  $httpFactory = new HttpFactory();
  $client = new GuzzleHttp\Client([
    'verify' => true,
    'headers' => [
      'User-Agent' => USER_AGENT_STR
    ]
  ]);
  $provider = new BskyProvider($options, $client, $httpFactory, $httpFactory, $httpFactory);
  $name = $provider->getName();
  $username = $_GET['username'];
  $bskyToucher = new BskyToucher();
  $userInfo = $bskyToucher->getUserInfo($username);
  if (!$userInfo) die(1);
  $pds = $userInfo->pds;
  $provider->setPds($pds);
  $token_builder = Builder::new(new JoseEncoder(), ChainedFormatter::default());
  $algorithm    = new Sha256();
  $signing_key   = InMemory::plainText(random_bytes(32));
  $now   = new DateTimeImmutable();
  $token = $token_builder
    ->withHeader('alg', 'ES256')
    ->withHeader('typ', 'JWT')
    ->withClaim('iss', $userInfo->did)
    ->withClaim('sub', 'https://'.SITE_DOMAIN.CLIENT_ID)
    ->withClaim('aud', 'did:web:'.str_replace("/", str_replace("https://", $pds)))
    ->withClaim('iat', strtotime('now'))
    ->getToken($algorithm, $signing_key);
    print_r($token->toString());
    
  /*$jwt_header = base64_encode(json_encode([
    'alg' => 'ES256',
    'typ' => 'JWT'
  ]));
  $jwt_body = base64_encode(json_encode([
    'iss' => $userInfo->did,
    'sub' => 'https://'.SITE_DOMAIN.CLIENT_ID,
    'aud' => 'did:web:'.str_replace("/", str_replace("https://", $pds)),
    'jti' => hash('sha512', bin2hex(random_bytes(256 / 2))),
    'iat' => strtotime('now')
  ]));
  $jwt = $jwt_header.$jwt_body.base64_encode(CERT);*/
  $client->setDefaultOption('headers', [
    'User-Agent' => USER_AGENT_STR,
    'Authorization' => 'Bearer: '.$token->toString()
  ]);
  if (isset($_GET['login']) && $_GET['login'] === $name) {
    $auth_url = $provider->getAuthorizationUrl();
    header('Location: '.$auth_url);
    die(1);
  } else if (isset($_GET['code'], $_GET['state'])) {
    $token = $provider->getAccessToken($_GET['code'], $_GET['state']);

  	// save the token in a permanent storage
  	// [...]

  	// access granted, redirect
  	header('Location: ?granted='.$name);
    die(1);
  } else if (isset($_GET['granted']) && $_GET['granted'] === $name) {
    die(1);
  } else if (isset($_GET['error'])) {
    die(1);
  }
  $latte = new Latte\Engine;
  $latte->render('./templates/login.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'form',
    'ogtitle' => SITE_TITLE." | login",
    'ogdesc' => SITE_DESC,
    'ogimage' => '',
    'ogurl' => 'https://'.SITE_DOMAIN.'/login'
  ]));
});

// https://shimaenaga.veryroundbird.house/oauth/authorize?client_id=https%3A%2F%2Ftangled.org%2Foauth%2Fclient-metadata.json&request_uri=urn%3Aietf%3Aparams%3Aoauth%3Arequest_uri%3Areq-2399ff42af66498132ebf8de809254b7

Flight::route('/createaccount', function(): void {
  $latte = new Latte\Engine;
  $latte->render('./templates/create.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'form',
    'ogtitle' => SITE_TITLE." | create account",
    'ogdesc' => SITE_DESC,
    'ogimage' => '',
    'ogurl' => SITE_DOMAIN.'/createaccount'
  ]));
});

Flight::route('/api/post/@did/@rkey', function (string $did, string $rkey): void {
  $bskyToucher = new BskyToucher();
  $ret = $bskyToucher->getPost($did, $rkey, true);
  if ($ret) {
    $latte = new Latte\Engine;
    $latte->render('./templates/_partials/post.latte', array_merge(Flight::get('standardParams'), [
      'post' => $ret
    ]));
    die(1);
  }
  Flight::json(['error' => 'malformed response or bad vibes']);
});

Flight::route('/api/likes/@did/@rkey', function (string $did, string $rkey): void {
  $bskyToucher = new BskyToucher();
  $ret = $bskyToucher->getLikes('at://'.$did.'/app.bsky.feed.post/'.$rkey);
  if ($ret) {
    $latte = new Latte\Engine;
    $output = $latte->renderToString('./templates/_partials/interaction_list.latte', array_merge(Flight::get('standardParams'), [
      'interactions' => $ret->records
    ]));
    $ret->rendered = $output;
    Flight::json($ret);
  }
});

Flight::route('/api/reposts/@did/@rkey', function (string $did, string $rkey): void {
  $bskyToucher = new BskyToucher();
  $ret = $bskyToucher->getReposts('at://'.$did.'/app.bsky.feed.post/'.$rkey);
  if ($ret) {
    $latte = new Latte\Engine;
    $output = $latte->renderToString('./templates/_partials/interaction_list.latte', array_merge(Flight::get('standardParams'), [
      'interactions' => $ret->records
    ]));
    $ret->rendered = $output;
    Flight::json($ret);
  }
});

Flight::route('/api/replies/@did/@rkey', function (string $did, string $rkey): void {
  $bskyToucher = new BskyToucher();
  $ret = $bskyToucher->getReplies('at://'.$did.'/app.bsky.feed.post/'.$rkey);
  if ($ret) {
    $latte = new Latte\Engine;
    $output = $latte->renderToString('./templates/_partials/feedPosts.latte', array_merge(Flight::get('standardParams'), [
      'total' => $ret->total,
      'cursor' => $ret->cursor,
      'posts' => array_map(function($p) { return $p->uri; }, $ret->records)
    ]));
    $ret->rendered = $output;
    Flight::json($ret);
  }
});

Flight::route('/api/quotes/@did/@rkey', function (string $did, string $rkey): void {
  $bskyToucher = new BskyToucher();
  $ret = $bskyToucher->getLikes('at://'.$did.'/app.bsky.feed.post/'.$rkey);
  if ($ret) {
    $latte = new Latte\Engine;
    $output = $latte->renderToString('./templates/_partials/interaction_list.latte', array_merge(Flight::get('standardParams'), [
      'interactions' => $ret->records
    ]));
    $ret->rendered = $output;
    Flight::json($ret);
  }
});

Flight::route('/api/user/@handle', function (string $handle): void {
  $bskyToucher = new BskyToucher();
  $ret = $bskyToucher->getUserInfo($handle);
  if ($ret) {
    Flight::json($ret);
    die(1);
  }
  Flight::json(['error' => 'malformed response or bad vibes']);
});

Flight::route('/api/feed/@did/@rkey', function (string $did, string $rkey): void {
  $bskyToucher = new BskyToucher();
});

Flight::route('/@page', function (string $page): void {
  $latte = new Latte\Engine;
  $converter = new CommonMarkConverter();
  $md = $converter->convert(file_get_contents('./pages/'.$page.'.md'));
  $latte->render('./templates/page.latte', array_merge(Flight::get('standardParams'), [
    'mainClass' => 'page',
    'content' => $md,
    'ogtitle' => SITE_TITLE." | ".$page,
    'ogdesc' => SITE_DESC,
    'ogimage' => '',
    'ogurl' => SITE_DOMAIN.'/'.$page
  ]));
});

Flight::start();

?>