#!/usr/bin/env node

// [start-readme]
//
// Run this one time script to add max mini toc 
// to rest reference documentation
//
// [end-readme]

const fs = require('fs')
const path = require('path')
const walk = require('walk-sync')

const re = /^---\n/gm

async function updateMdHeaders (dir) {
  walk(dir, { includeBasePath: true, directories: false })
    .filter(file => !file.endsWith('README.md') && !file.endsWith('index.md') && file.includes('content/rest/reference'))
    .forEach(file => {
      fs.readFile(file, 'utf8', (err, data) => {
        if (err) return console.error(err)
        const matchHeader = data.match(re)[1]
        let result
        let t = 0
        if (matchHeader) {
          result = data.replace(re, function (match) {
            t++
            return (t === 2) ? 'miniTocMaxHeadingLevel: 3\n---\n' : match
          })
        }
        fs.writeFile(file, result, 'utf8', function (err) {
          if (err) return console.log(err)
        })
      })
    })
}

async function main () {
  await updateMdHeaders(path.join(__dirname, '../../content'))
}

main()
  .catch(console.error)
  .finally(() => console.log('Done'))