const fs = require('fs')
const path = require('path')
const frontmatter = require('./read-frontmatter')
const getApplicableVersions = require('./get-applicable-versions')
const removeFPTFromPath = require('./remove-fpt-from-path')

// Both internal and external products are specified in content/index.md
const homepage = path.posix.join(process.cwd(), 'content/index.md')
const { data } = frontmatter(fs.readFileSync(homepage, 'utf8'))
const productIds = data.children
const externalProducts = data.externalProducts

const internalProducts = {}

productIds.forEach(productId => {
  const relPath = productId
  const dir = path.posix.join('content', relPath)

  // Early Access may not exist in the current checkout
  if (!fs.existsSync(dir)) return

  const toc = path.posix.join(dir, 'index.md')
  const { data } = frontmatter(fs.readFileSync(toc, 'utf8'))
  const applicableVersions = getApplicableVersions(data.versions, toc)
  const href = removeFPTFromPath(path.posix.join('/', applicableVersions[0], productId))

  internalProducts[productId] = {
    id: productId,
    name: data.shortTitle || data.title,
    href,
    dir,
    toc,
    wip: data.wip || false,
    hidden: data.hidden || false
  }

  internalProducts[productId].versions = applicableVersions
})

const productMap = Object.assign({}, internalProducts, externalProducts)

module.exports = {
  productIds,
  productMap
}