const yoem = require('yoem');

const options = {

  services: {
    // You can specify a fixed list of services that you wish to support,
    // Either from the list of pre-defined ones or by specifying your own:
    facebookPost: yoem.service.facebookPost,
    facebookVideo: yoem.service.facebookVideo,
    twitter: yoem.service.twitter,
    youtube: yoem.service.youtube,
    spotify: yoem.service.spotify,
    imgur: yoem.service.imgur,

    // Realistically you'll want to use the default collection of services
    ...yoem.services,
    // And include some of your own
    someimportantcompany: {
      name: 'SomeImportantService',
      matches: [ 'someimportantcompany.com/**' ],
      // See below for detailed examples of writing your own services:
      url: 'https://someimportantcompany.com/oembed.json?url={{url}}'
    },
  },

  // Specify a timeout, uses the ms syntax
  timeout: '30s',

  // Add a blacklist of URLs to reject
  blacklist: [ '*.wikia.com/**' ],
  // Or specify a whitelist of URLs if that's preferred
  whitelist: [ '**facebook.com/**', '**twitter.com/**', '**instagram.com/**' ],

  // Override the default fallback fetch function
  async fallback(opts) {
    // `opts.url` => The URL being expanded
    // `opts.timeout` => The timeout key above
    // `opts.blacklist` => The blacklist array above
    // `opts.whitelist` => The whitelist array above
    // ... => And the rest of the properties are passed into yoem({ ... })
    //
    // Should return the embed object
  },

};

const express = require('express');
const yoem = require('yoem');

const app = express();

app.get('/embed', yoem.express({
  // See the Options documentation above
}));

app.listen(3000, () => console.log('Listening on http://localhost:3000/'));

const Koa = require('koa');
const yoem = require('yoem');

const app = new Koa();

app.get('/embed', yoem.koa({
  // See the Options documentation above
}));

app.listen(3000, () => console.log('Listening on http://localhost:3000/'));

const yoem = require('yoem');

module.exports = yoem.micro({
  // See the Options documentation above
});

const yoem = require('yoem');

module.exports = yoem.zeit({
  // See the Options documentation above
}));

// start/routes.js
const yoem = require('yoem');

Route.get('/embed', yoem.adonis({
  // See the Options documentation above
}));

const assert = require('assert');
const yoem = require('yoem');

module.exports.embed = function embed(event, context, callback) {
  try {
    const { url } = event || {};
    assert(typeof url === 'string', 'Missing URL from event');

    const result = await yoem({
      url,
      services: {
        // Include the default list of services
        ...yoem.services,
        // And your own custom one
        someimportantcompany: {
          name: 'SomeImportantService',
          matches: [ 'someimportantcompany.com/**' ],
          url: 'https://someimportantcompany.com/oembed.json?url={{url}}'
        },
      },
    });

    callback(null, result);
  } catch (err) {
    callback(err);
  }
};

{
  someimportantcompany: {
    name: 'SomeImportantService',
    matches: [ 'someimportantcompany.com/**' ],

    // `url` can be a string with the placeholder
    url: 'https://someimportantcompany.com/oembed.json?url={{url}}'

    // Or a function that returns the URL to hit:
    url: ({ url }) => `https://someimportantcompany.com/oemned.json?url=${url}&time=${Date.now()}`,
  },
}

{
  someimportantcompany: {
    name: 'SomeImportantService',
    matches: [ 'someimportantcompany.com/**' ],

    // This could be as simple as a static return value
    get() {
      return {
        version: '1.0',
        type: 'link',
        title: 'Some Important Title'
        provider_name: 'Some Important Company',
        provider_url: 'https://someimportantcompany.com',
        description: 'Cupcake ipsum dolor. Sit amet pie caramels soufflé cupcake.',
        thumbnail_url: 'https://avatars3.githubusercontent.com/u/16253596?s=200&v=4',
        thumbnail_height: '200',
        thumbnail_width: '200',
      };
    },

    // A function that returns a promise
    async get({ url }) {
      return axios.get('https://someimportantcompany.com/oembed.json', {
        maxRedirects: 0,
        params: { url },
        responseType: 'json',
        validateStatus: s => s === 200,
      }).then(({ data }) => data);
    },

    // Or an async function
    async get({ url }) {
      const { data } = await axios.get('https://someimportantcompany.com/oembed.json', {
        maxRedirects: 0,
        params: { url },
        responseType: 'json',
        validateStatus: s => s === 200,
      });

      return data;
    },
  },
}