<?php

class Controller
{
  protected static $queuedFunctions = [];

  public static function dispatch($uri)
  {
    try
    {
      if (IS_PRODUCTION && function_exists('newrelic_name_transaction'))
      {
        newrelic_name_transaction(Request::getMethod() . ' ' . strtolower($uri));
      }

      $viewAndParams  = static::execute(Request::getMethod(), $uri);
      $viewTemplate   = $viewAndParams[0];
      $viewParameters = $viewAndParams[1] ?? [];
      if (!IS_PRODUCTION && isset($viewAndParams[2]))
      {
        throw new Exception('use response::setheader instead of returning headers');
      }

      if (!$viewTemplate)
      {
        if ($viewTemplate !== null)
        {
          throw new LogicException('All execute methods must return a template or NULL.');
        }
      }
      else
      {
        $layout = !(isset($viewParameters['_no_layout']) && $viewParameters['_no_layout']);
        unset($viewParameters['_no_layout']);

        $layoutParams = $viewParameters[View::LAYOUT_PARAMS] ?? [];
        unset($viewParameters[View::LAYOUT_PARAMS]);

        $content = View::render($viewTemplate, $viewParameters + ['fullPage' => true]);

        Response::setContent($layout ? View::render('layout/basic', ['content' => $content] + $layoutParams) : $content);
      }

      Response::setDefaultSecurityHeaders();
      if (Request::isGzipAccepted())
      {
        Response::gzipContentIfNotDisabled();
      }

      Response::send();
    }
    catch (StopException $e)
    {

    }
  }

  public static function execute($method, $uri)
  {
    $router = static::getRouterWithRoutes();
    try
    {
      $dispatcher = new Routing\Dispatcher($router->getData());
      return $dispatcher->dispatch($method, $uri);
    }
    catch (\Routing\HttpRouteNotFoundException $e)
    {
      return NavActions::execute404();
    }
    catch (\Routing\HttpMethodNotAllowedException $e)
    {
      Response::setStatus(405);
      Response::setHeader('Allow', implode(', ', $e->getAllowedMethods()));
      return ['page/405'];
    }
  }

  protected static function getRouterWithRoutes(): \Routing\RouteCollector
  {
    $router = new Routing\RouteCollector();

    $router->get(['/', 'home'], 'ContentActions::executeHome');

    $router->get(['/get', 'get'], 'DownloadActions::executeGet');
    $router->get(['/windows', 'get-windows'], 'DownloadActions::executeGet');
    $router->get(['/linux', 'get-linux'], 'DownloadActions::executeGet');
    $router->get(['/osx', 'get-osx'], 'DownloadActions::executeGet');
    $router->get(['/android', 'get-android'], 'DownloadActions::executeGet');
    $router->get(['/ios', 'get-ios'], 'DownloadActions::executeGet');
    $router->get('/roadmap', 'ContentActions::executeRoadmap');

    $router->get('/developer-program', 'AcquisitionActions::executeDeveloperProgram');
    $router->post('/developer-program/post', 'AcquisitionActions::executeDeveloperProgramPost');
    $router->get('/developer-program/callback', 'AcquisitionActions::executeDeveloperProgramGithubCallback');

    $router->get(['/press-kit.zip', 'press-kit'], 'ContentActions::executePressKit');

    $router->post('/postcommit', 'OpsActions::executePostCommit');
    $router->post('/log-upload', 'OpsActions::executeLogUpload');

    $router->any('/list/subscribe', 'MailActions::executeSubscribe');
    $router->get('/list/confirm/{hash}', 'MailActions::executeConfirm');

    $router->any('/dmca', 'ReportActions::executeDmca');

    $router->any('/youtube/thanks', 'AcquisitionActions::executeThanks');
    $router->any('/youtube/sub', 'AcquisitionActions::executeYouTubeSub');
    $router->any('/youtube/{campaignId:c}?', 'AcquisitionActions::executeYouTube');

    $router->post('/set-culture', 'i18nActions::setCulture');

    $permanentRedirects = [
      '/lbry-osx-latest.dmg'         => '/get',
      '/lbry-linux-latest.deb'       => '/get',
      '/dl/lbry_setup.sh'            => '/get',
      '/art'                         => '/what',
      '/why'                         => '/learn',
      '/feedback'                    => '/learn',
      '/faq/when-referral-payouts'   => '/faq/referrals',
      '/news/meet-the-lbry-founders' => '/team',
      '/join-list'                   => '/list/subscribe',
    ];

    $tempRedirects = [
      '/apple-touch-icon.png' => '/img/fav/apple-touch-icon.png',
      '/LBRY-deck.pdf' => 'https://www.dropbox.com/s/0xj4vgucsbi8rtv/lbry-deck.pdf?dl=1',
      '/deck.pdf'      => 'https://www.dropbox.com/s/0xj4vgucsbi8rtv/lbry-deck.pdf?dl=1',
      '/pln.pdf'       => 'https://www.dropbox.com/s/uevjrwnyr672clj/lbry-pln.pdf?dl=1',
      '/plan.pdf'      => 'https://www.dropbox.com/s/uevjrwnyr672clj/lbry-pln.pdf?dl=1',
    ];


    foreach ([302 => $tempRedirects, 301 => $permanentRedirects] as $code => $redirects)
    {
      foreach ($redirects as $src => $target)
      {
        $router->any($src, function () use ($target, $code) { return static::redirect($target, $code); });
      }
    }

    $router->any('/get/lbry.{ext:c}', 'DownloadActions::executeGetRedirect');

    $router->get([ContentActions::URL_NEWS . '/{slug:c}?', 'news'], 'ContentActions::executeNews');
    $router->get([ContentActions::URL_FAQ . '/{slug:c}?', 'faq'], 'ContentActions::executeFaq');
    $router->get([ContentActions::URL_BOUNTY . '/{slug:c}?', 'bounty'], 'ContentActions::executeBounty');
    $router->get([ContentActions::URL_PRESS . '/{slug:c}', 'press'], 'ContentActions::executePress');

    $router->any(['/signup{whatever}?', 'signup'], 'DownloadActions::executeSignup');

    $router->get('/{slug}', function (string $slug)
    {
      if (View::exists('page/' . $slug))
      {
        Response::enableHttpCache();
        return ['page/' . $slug, []];
      }
      else
      {
        return NavActions::execute404();
      }
    });

    return $router;
  }

  public static function redirect($url, $statusCode = 302)
  {
    if (!$url)
    {
      throw new InvalidArgumentException('Cannot redirect to an empty URL.');
    }

    $url = str_replace('&amp;', '&', $url);

    Response::setStatus($statusCode);

    if ($statusCode == 201 || ($statusCode >= 300 && $statusCode < 400))
    {
      Response::setHeader(Response::HEADER_LOCATION, $url);
    }

    return ['internal/redirect', ['url' => $url]];
  }

  public static function queueToRunAfterResponse(callable $fn)
  {
    static::$queuedFunctions[] = $fn;
  }

  public static function shutdown()
  {
    while ($fn = array_shift(static::$queuedFunctions))
    {
      call_user_func($fn);
    }
  }
}