#!/usr/bin/env node

const fs = require('fs')


function rmInDir(dirPath) {
  try { var files = fs.readdirSync(dirPath) }
  catch(e) { return }
  if (files.length > 0) {
    for (var i = 0; i < files.length; i++) {
      var filePath = dirPath + '/' + files[i]
      if (fs.statSync(filePath).isFile())
        fs.unlinkSync(filePath)
      else
        rmDir(filePath)
    }
  }
}

function cp(src, dest) {
  if (!fs.existsSync(src)) {
    return false;
  }

  var data = fs.readFileSync(src, 'utf-8');
  fs.writeFileSync(dest, data);
}


let manifest = JSON.parse(fs.readFileSync('templates/.fontcustom-manifest.json', 'utf-8'))
let desired = fs.readFileSync('../wanted.ini', 'utf-8').split('\n').filter((x) => x.length && x[0] !== '#')

// This forces a rebuild
manifest.checksum.previous = 'asdf'

console.log('Preparing fontcustom manifest...')
console.log(`Including ${desired.length} icons`)

const orig_glyphs = manifest.glyphs

manifest.glyphs = Object.keys(orig_glyphs)
  .filter(key => desired.includes(key))
  .reduce((obj, key) => {
    obj[key] = orig_glyphs[key]
    return obj
  }, {})


console.log('\x1b[32m[Writing]\x1b[m .fontcustom-manifest.json')
fs.writeFileSync('../Fork-Awesome/src/icons/.fontcustom-manifest.json', JSON.stringify(manifest, null, 2))

console.log('Preparing icons.yml...')


// this would be prettier with some yaml module, but to avoid installing anything...

let iconsy = fs.readFileSync('templates/icons.yml', 'utf-8')

let pieces = iconsy.substring(iconsy.indexOf('\n')+1).split('  - name:')
pieces.shift() // remove first
// now we have the entries, without leading '  - name'

let pattern = /id:\s+(\w+)\n/

pieces = pieces.filter((x) => {
    let ar = pattern.exec(x)
    return ar !== null && desired.indexOf(ar[1]) !== -1
})

let combined = 'icons:\n  - name:' + pieces.join('  - name:')

console.log('\x1b[32m[Writing]\x1b[m icons.yml')
fs.writeFileSync('../Fork-Awesome/src/icons/icons.yml', combined)


console.log('Deleting files in svg/ ...')

rmInDir('../Fork-Awesome/src/icons/svg')

console.log('Copying desired files from svg-all/ to svg/ ...')
for (let a of desired) {
  cp(`./templates/svg/${a}.svg`, `../Fork-Awesome/src/icons/svg/${a}.svg`)
}