import axios from 'axios'
import fs from 'fs'
import path from 'path'

const formatDate = (date = new Date) => {
  const year = date.getFullYear ()
  const month = (date.getMonth () + 1).toString ().padStart (2, '0')
  const day = date.getDate ().toString ().padStart (2, '0')

  return `${ year }-${ month }-${ day }`
}

const SITE_TITLE = 'ぼざクリ タグ広場'
const DOMAIN = 'https://hub.nizika.monster'
const API_BASE_URL = 'https://hub.nizika.monster/api'

const fetchPosts = async () => (await axios.get (`${ API_BASE_URL }/posts`)).data.posts
const fetchPostIds = async () => (await fetchPosts ()).map (post => post.id)

const fetchTags = async () => (await axios.get (`${ API_BASE_URL }/tags`)).data
const fetchTagNames = async () => (await fetchTags ()).map (tag => tag.name)

const fetchWikiPages = async () => (await axios.get (`${ API_BASE_URL }/wiki`)).data
const fetchWikiTitles = async () => (await fetchWikiPages ()).map (page => page.title)

const posts = (await fetchPosts ()).map (post => [
    `/posts/${ post.id }`,
    `${ post.title || post.url } | ${ SITE_TITLE }` ])

const tags = (await fetchTags ()).map (tag => [
    `/posts?${ new URLSearchParams ({ tags: tag.name }) }`,
    `${ tag.name } | ${ SITE_TITLE }`])

const wikiPages = (await fetchWikiPages ()).map (page => [
    `/wiki/${ encodeURIComponent (page.title) }`,
    `${ page.title } Wiki | ${ SITE_TITLE }`])

const routes = [
    ['/', `${ SITE_TITLE }　〜 ぼざろクリーチャーシリーズ綜合リンク集サイト`],
    ...tags,
    ...posts,
    ['/wiki', `Wiki | ${ SITE_TITLE }`],
    ...wikiPages]

const xml = `<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
${ routes.map (([route]) => `  <url>
    <loc>${ DOMAIN }${ route }</loc>
    <lastmod>${ formatDate () }</lastmod>
    <changefreq>daily</changefreq>
  </url>`).join ('\n') }
</urlset>`

const rss = `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
  <channel>
    <title>The Series of Bocchi the Rock! Creatures Hub Feed</title>
    <link>${ DOMAIN }/</link>
    <description>最新の投稿、タグ、Wiki ページの一覧</description>
    <language>ja</language>
    <pubDate>${ (new Date).toUTCString () }</pubDate>
${ routes.map (([route, title]) => `    <item>
      <title>${ title }</title>
      <link>${ DOMAIN }${ route }</link>
      <guid>${ DOMAIN }${ route }</guid>
      <pubDate>${ (new Date).toUTCString () }</pubDate>
    </item>`).join ('\n') }
  </channel>
</rss>`

fs.writeFileSync (path.resolve ('dist/sitemap.xml'), xml)
fs.writeFileSync (path.resolve ('dist/rss.xml'), rss)