const _ = require('lodash');

const REQUEST_TOKEN_URL = 'https://api.twitter.com/oauth/request_token';
const AUTHORIZE_URL = 'https://api.twitter.com/oauth/authorize';
const ACCESS_TOKEN_URL = 'https://api.twitter.com/oauth/access_token';

const getRequestToken = async (z, bundle) => {
  const response = await z.request({
    url: REQUEST_TOKEN_URL,
    method: 'POST',
    auth: {
      oauth_consumer_key: process.env.CLIENT_ID,
      oauth_consumer_secret: process.env.CLIENT_SECRET,
      oauth_signature_method: 'HMAC-SHA1',
      oauth_callback: bundle.inputData.redirect_uri,
      oauth_version: '1.0', // Twitter says this should be 1.0
    },
  });
  return response.data;
};

const getAccessToken = async (z, bundle) => {
  const response = await z.request({
    url: ACCESS_TOKEN_URL,
    method: 'POST',
    auth: {
      oauth_consumer_key: process.env.CLIENT_ID,
      oauth_consumer_secret: process.env.CLIENT_SECRET,
      oauth_token: bundle.inputData.oauth_token,
      oauth_token_secret: bundle.inputData.oauth_token_secret,
      oauth_verifier: bundle.inputData.oauth_verifier,
    },
  });
  return response.data;
};

const config = {
  type: 'oauth1',
  oauth1Config: {
    // We have to define getRequestToken and getAccessToken functions to explicitly
    // parse the response like it has a form body here, since Twitter responds
    // 'text/html' for the Content-Type header
    getRequestToken,
    getAccessToken,

    authorizeUrl: {
      url: AUTHORIZE_URL,
      params: {
        oauth_token: '{{bundle.inputData.oauth_token}}',
      },
    },
  },
  test: {
    url: 'https://api.twitter.com/1.1/account/settings.json',
  },
  connectionLabel: '{{screen_name}}',
};

// A middleware that is run before z.request() actually makes the request. Here we're
// adding necessary OAuth1 parameters to `auth` property of the request object.
const includeAccessToken = (req, z, bundle) => {
  if (
    bundle.authData &&
    bundle.authData.oauth_token &&
    bundle.authData.oauth_token_secret
  ) {
    // Just put your OAuth1 credentials in req.auth, Zapier will sign the request for
    // you.
    req.auth = req.auth || {};
    _.defaults(req.auth, {
      oauth_consumer_key: process.env.CLIENT_ID,
      oauth_consumer_secret: process.env.CLIENT_SECRET,
      oauth_token: bundle.authData.oauth_token,
      oauth_token_secret: bundle.authData.oauth_token_secret,
    });
  }
  return req;
};

module.exports = {
  config,
  includeAccessToken,
};