/*
 * This will update (replace really) the Algolia index with the
 * current website contents. Or at least the markdown and Strapi
 * content
 *
 * It expects the following environment vars to be set in a
 * .env file in the 'sites/dev' folder:
 *
 * ALGOLIA_API_WRITE_KEY -> Needs permission to index/create/delete
 *
 */
import dotenv from 'dotenv'
import fs from 'fs'
import path from 'path'
import algoliasearch from 'algoliasearch'
import { unified } from 'unified'
import remarkParser from 'remark-parse'
import remarkCompiler from 'remark-stringify'
import remarkFrontmatter from 'remark-frontmatter'
import remarkFrontmatterExtractor from 'remark-extract-frontmatter'
import remarkRehype from 'remark-rehype'
import rehypeSanitize from 'rehype-sanitize'
import rehypeStringify from 'rehype-stringify'
import yaml from 'yaml'
import { getMdxFileList } from '../../shared/prebuild/mdx.mjs'
import config from '../algolia.config.mjs'
dotenv.config()

/*
 * Initialize Algolia client
 */
const client = algoliasearch(config.algolia.app, process.env.ALGOLIA_API_WRITE_KEY)
const index = client.initIndex(config.algolia.index)

/*
 * Loads markdown from disk and compiles it into HTML for indexing
 */
const markdownLoader = async (file) => {
  const md = await fs.promises.readFile(file, 'utf-8')

  const page = await unified()
    .use(remarkParser)
    .use(remarkCompiler)
    .use(remarkFrontmatter)
    .use(remarkFrontmatterExtractor, { yaml: yaml.parse })
    .use(remarkRehype)
    .use(rehypeSanitize)
    .use(rehypeStringify)
    .process(md)
  const id = file.split('freesewing/markdown/dev').pop().slice(0, -6)

  return {
    objectID: id,
    page: id,
    title: page.data.title,
    body: page.value,
    type: 'docs',
  }
}

/*
 * Clear the index to scrub old pages
 */
const clearIndex = async () => {
  console.log(`🗑️  Clearing index`)
  await index.clearObjects()
}

/*
 * Get and index markdown content
 */
const indexMarkdownContent = async () => {
  // Say hi
  console.log(`🗂️  Indexing Markdown content to Algolia`)

  // Setup MDX root path
  const mdxRoot = path.resolve('..', '..', 'markdown', 'dev')

  // Get list of filenames
  const list = await getMdxFileList(mdxRoot, 'en')
  const pages = []

  for (const file of list) pages.push(await markdownLoader(file))
  // Index markdown to Algolia
  await index.clearObjects()
  await index
    .saveObjects(pages)
    .then(() => null)
    .catch((err) => console.log(err))
}

const run = async () => {
  if (process.env.VERCEL_ENV === 'production' || process.env.FORCE_ALGOLIA) {
    console.log()
    await clearIndex()
    await indexMarkdownContent()
    console.log()
  } else {
    console.log()
    console.log('Not a producion deploy. Not indexing to Algolia.')
    console.log('To force indexing, set the FORCE_ALGOLIA environment variable')
    console.log()
  }
}

run()