/**
 * Copyright (c) 2017-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

const fs = require("fs-extra");
const path = require("path");
const os = require("os");
const Feed = require("feed");

const chalk = require("chalk");
const CWD = process.cwd();

const siteConfig = require(CWD + "/siteConfig.js");

const blogFolder = path.resolve("../blog/");
const blogRootURL = siteConfig.url + "/blog";
const jestImage = siteConfig.url + siteConfig.headerIcon;

/****************************************************************************/

let readMetadata;
let Metadata;

readMetadata = require("./readMetadata.js");
readMetadata.generateDocsMetadata();
Metadata = require("../core/metadata.js");

/****************************************************************************/

module.exports = function(type) {
  console.log("feed.js triggered...");

  type = type || "rss";

  readMetadata.generateBlogMetadata();
  const MetadataBlog = require("../core/MetadataBlog.js");

  const feed = new Feed({
    title: siteConfig.title + " Blog",
    description:
      "The best place to stay up-to-date with the latest " +
      siteConfig.title +
      " news and events.",
    id: blogRootURL,
    link: blogRootURL,
    image: jestImage,
    copyright: siteConfig.copyright,
    updated: new Date(MetadataBlog[0].date)
  });

  MetadataBlog.forEach(post => {
    const url = blogRootURL + "/" + post.path;
    let content = "";
    if (post.content.indexOf("<!--truncate-->") == -1) {
      content = post.content.trim().substring(0, 250);
    } else {
      let contentArr = post.content.split("<!--truncate-->");
      if (contentArr.length > 0) {
        content = contentArr[0];
      }
    }

    feed.addItem({
      title: post.title,
      link: url,
      author: [
        {
          name: post.author,
          link: post.authorURL
        }
      ],
      date: new Date(post.date),
      description: content
    });
  });

  return type === "rss" ? feed.rss2() : feed.atom1();
};