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import fs from 'fs'
import { getPosts } from './api/posts'

function formatDate(date) {
  var d = new Date(date),
    month = '' + (d.getMonth() + 1),
    day = '' + d.getDate(),
    year = d.getFullYear();

  if (month.length < 2) month = '0' + month;
  if (day.length < 2) day = '0' + day;

  return [year, month, day].join('-');
}

function generateXML({ urls, hostname }) {
    var xml = '<?xml version="1.0" encoding="UTF-8"?><urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';
    for (var i in urls) {
        xml += '<url>';
        xml += '<loc>'+ hostname + urls[i].url + '</loc>';
        xml += urls[i].lastmod ? '<lastmod>'+ urls[i].lastmod +'</lastmod>' : '';
        xml += '<changefreq>'+ urls[i].changefreq +'</changefreq>';
        xml += '<priority>'+ urls[i].priority +'</priority>';
        xml += '</url>';
        i++;
    }
    xml += '</urlset>';
    return xml;
}

function createSitemap({ hostname, cacheTime, urls }) {
  const xml = generateXML({ urls, hostname, })
  fs.writeFile(
    './static/sitemap.xml',
    xml,
    () => console.log('[\u2713] Sitemap Generated')
  );
}

const pages = [
  { route: '/', changefreq: 'weekly', priority: 1 },
  { route: '/about', changefreq: 'monthly', priority: 0.5 },
  { route: '/blog', changefreq: 'daily', priority: 0.8 },
  { route: '/changelog', changefreq: 'weekly', priority: 0.5 },
  { route: '/docs', changefreq: 'weekly', priority: 0.7 },
  { route: '/pricing', changefreq: 'monthly', priority: 0.5 }
];

async function fetchAll () {
  try {
    const posts = await getPosts({ limit: 1000 });

    const allData = {
      posts
    };

    const sitemap = createSitemap({
      hostname: 'https://timber.io',
      cacheTime: 600000,
      urls: [
        ...pages.map(p => ({
          url: p.route,
          changefreq: p.changefreq,
          priority: p.priority
        })),
        ...posts.items.map(p => ({
          url: `/blog/${p.fields.slug}`,
          changefreq: 'monthly',
          lastmod: formatDate(p.sys.updatedAt),
          priority: 0.5
        }))
      ]
    });
  } catch (e) {
    console.error(e);
  }
}

fetchAll();