const r2 = require('r2')
const getPost = require('mediumexporter').getPost

/**
 * function [fetchFromMedium]
 * @returns [string] status
*/
const fetchFromMedium = async (mediumUrl) => {
  console.debug('Fetching: ' + mediumUrl);
  return await getPost(mediumUrl, { returnObject: true })
};

/**
 * function [pushToGhost]
 * @returns [string] status
*/
const pushToGhost = (postSlug) => {
  console.info('Pushing: ' + postSlug);
};

/**
 * function [mediumToGhost]
 * @returns [string] status
*/
const mediumToGhost = (mediumUrl) => {
  console.info('Copying: ' + mediumUrl);
};


async function fetchMediumJSON(mediumUrl) {
  console.debug(`Fetching: ${mediumUrl}`)
  const response = await fetch(mediumUrl)
  const text = await response.text()
  const json = await JSON.parse(text.substr(text.indexOf('{')))
  return json;
}

/**
 * function [createUser]
 * @returns [string] status
*/
const generateUserData = async (mediumUsername, email) => {
  console.debug('Creating: @' + mediumUsername + '(email: ' + email + ')');
  const mediumUrl = `https://medium.com/@${mediumUsername}/?format=json`;
  const json = await fetchMediumJSON(mediumUrl);

  if (!json.success) {
    console.error(`Error: ${json.error}`)
    return false
  }

  console.debug(`Name: ${json.payload.user.name}`)
  console.debug(`Bio: ${json.payload.user.bio}`)

  // Generate Ghost JSON

  const ghostData = {
    data: {
      users: [
        {
          id: 1,
          slug: json.payload.user.username,
          bio: json.payload.user.bio,
          email: email,
          name: json.payload.user.name,
        }
      ]
    },
    meta: {
      exported_on: new Date,
      version: '2.14.0'
    }
  }


  return(JSON.stringify(ghostData))
};

module.exports = {
  fetchFromMedium,
  pushToGhost,
  mediumToGhost,
  generateUserData,
}