<?php

class DeveloperActions extends Actions
{
  const DEVELOPER_REWARD = 250,
    API_DOC_URL = 'https://lbryio.github.io/lbry/';

  public static function executeQuickstart(string $step = null)
  {
    $stepLabels  = [
      ''        => 'Home',
      'install' => 'Installation',
      'api'     => 'The API',
      'credits' => 'Credits'
    ];
    $allSteps    = array_keys($stepLabels);
    $currentStep = $step ?: $allSteps[0];

    $viewParams = [
      'currentStep' => $currentStep,
      'stepLabels'  => $stepLabels
    ];

    if ($currentStep !== 'all')
    {
      if (!isset($stepLabels[$currentStep]))
      {
        Controller::redirect('/quickstart');
      }

      $stepNum = array_flip($allSteps)[$currentStep];

      $viewParams += [
        'stepNum'  => $stepNum,
        'prevStep' => $stepNum === 0 ? null : $allSteps[$stepNum - 1],
        'nextStep' => $stepNum + 1 >= count($allSteps) ? null : $allSteps[$stepNum + 1],
      ];
    }

    return ['developer/quickstart', $viewParams];
  }

  public static function prepareQuickstartHomePartial(array $vars)
  {
    return $vars + [
      'usdValue' => static::DEVELOPER_REWARD * LBRY::getLBCtoUSDRate()
    ];
  }

  public static function prepareFormNewDeveloperRewardPartial(array $vars)
  {
    return $vars + [
      'defaultWalletAddress' => Session::get(Session::KEY_DEVELOPER_CREDITS_WALLET_ADDRESS),
      'error'                => Session::get(Session::KEY_DEVELOPER_LAST_FORM) == "new_developer" ? Session::getFlash(Session::KEY_DEVELOPER_CREDITS_ERROR) : '',
      'apiUrl'               => LBRY::getApiUrl('/user/new_github')
    ];
  }

  public static function prepareFormCreditsPublishPartial(array $vars)
  {
    return $vars + [
      'defaultWalletAddress' => Session::get(Session::KEY_DEVELOPER_CREDITS_WALLET_ADDRESS),
      'error'                => Session::get(Session::KEY_DEVELOPER_LAST_FORM) == "new_publish" ? Session::getFlash(Session::KEY_DEVELOPER_CREDITS_ERROR) : '',
      'apiUrl'               => LBRY::getApiUrl('/reward/new')
    ];
  }

  public static function executeQuickstartAuth()
  {
    Session::set(Session::KEY_DEVELOPER_CREDITS_WALLET_ADDRESS, trim(Request::getPostParam('wallet_address')));
    Session::set(Session::KEY_DEVELOPER_LAST_FORM, Request::getPostParam('formName'));

    if (Request::getPostParam('returnUrl'))
    {
      Session::set(Session::KEY_DEVELOPER_RETURN_URL_SUCCESS, Request::getPostParam('returnUrl'));
    }

    if (!Config::get('github_developer_credits_client_id'))
    {
      throw new Exception('no github client id');
    }

    $gitHubParams = [
      'client_id'    => Config::get('github_developer_credits_client_id'),
      'redirect_uri' => Request::getHostAndProto() . '/quickstart/github/callback',
      'scope'        => 'user:email,public_repo',
      'allow_signup' => false
    ];

    return Controller::redirect('https://github.com/login/oauth/authorize?' . http_build_query($gitHubParams));
  }

  public static function executeQuickstartGithubCallback()
  {
    $code = Request::getParam('code');

    if (!$code)
    {
      Session::setFlash(Session::KEY_DEVELOPER_CREDITS_ERROR, 'This does not appear to be a valid response from GitHub.');
    }
    else
    {
      $authResponseData = Curl::post('https://github.com/login/oauth/access_token', [
        'code'          => $code,
        'client_id'     => Config::get('github_developer_credits_client_id'),
        'client_secret' => Config::get('github_developer_credits_client_secret')
      ], [
        'headers'       => ['Accept: application/json'],
        'json_response' => true
      ]);

      if (!$authResponseData || !isset($authResponseData['access_token']))
      {
        Session::setFlash(Session::KEY_DEVELOPER_CREDITS_ERROR, 'Request to GitHub failed.');
      }
      elseif (isset($authResponseData['error_description']))
      {
        Session::setFlash(Session::KEY_DEVELOPER_CREDITS_ERROR, 'GitHub replied: ' . $authResponseData['error_description']);
      }
      else
      {
        Session::set(Session::KEY_GITHUB_ACCESS_TOKEN, $authResponseData['access_token']);
      }
    }

    return Controller::redirect(Session::get(Session::KEY_DEVELOPER_RETURN_URL_SUCCESS, '/quickstart/credits'));
  }
}