import { mkdir, exists, readdir, copyFile } from "node:fs/promises"
import * as path from 'path'

const emojiDir = './emoji'
if(!await exists(emojiDir)) await mkdir(emojiDir)

const fluentDir = './sources/fluentui-emoji/assets'
const fluentList = await readdir(fluentDir)
const animatedDir = `./sources/Animated-Fluent-Emojis/Emojis`
const animatedCatList = await readdir(animatedDir)
const animatedList:Map<string, string> = new Map<string, string>()
for(let c in animatedCatList) {
  const category = animatedCatList[c]
  const catDir = `${animatedDir}/${category}`
  const catFiles = await readdir(catDir)
  catFiles.forEach((filename) => {
    animatedList.set(path.parse(filename).name, `${catDir}/${filename}`)
  })
}

const mapping = []

await fluentList.forEach(async (folder) => {
  let thisEmojiIn = `${fluentDir}/${folder}`
  const metadataFile = Bun.file(`${thisEmojiIn}/metadata.json`)
  const metadata = await metadataFile.json()
  const thisEmojiOut = `${emojiDir}/${metadata.glyph}`
  if(!await exists(thisEmojiOut)) await mkdir(thisEmojiOut)
  if(!await exists(`${thisEmojiOut}/metadata.json`)) await Bun.write(`${thisEmojiOut}/metadata.json`, metadataFile)
  if(metadata.unicodeSkintones) thisEmojiIn = `${thisEmojiIn}/Default`

  const in3d = `${thisEmojiIn}/3D`
  const inColor = `${thisEmojiIn}/Color`
  const inFlat = `${thisEmojiIn}/Flat`
  const inHighContrast = `${thisEmojiIn}/High Contrast`

  // we have to search for the appropriate animated folder
  let title = folder
  if(metadata.unicodeSkintones) title += ' Light Skin Tone'

  let imgAnim = Bun.file(animatedList.get(title) || `${in3d}/${(await readdir(in3d))[0]}`)

  const img3d = Bun.file(`${in3d}/${(await readdir(in3d))[0]}`)
  const imgColor = Bun.file(`${inColor}/${(await readdir(inColor))[0]}`)
  const imgFlat = Bun.file(`${inFlat}/${(await readdir(inFlat))[0]}`)
  const imgHighContrast = Bun.file(`${inHighContrast}/${(await readdir(inHighContrast))[0]}`)

  if(!await exists(`${thisEmojiOut}/animated.png`)) await Bun.write(`${thisEmojiOut}/animated.png`, imgAnim)
  if(!await exists(`${thisEmojiOut}/3d.png`)) await Bun.write(`${thisEmojiOut}/3d.png`, img3d)
  if(!await exists(`${thisEmojiOut}/color.svg`)) await Bun.write(`${thisEmojiOut}/color.svg`, imgColor)
  if(!await exists(`${thisEmojiOut}/flat.svg`)) await Bun.write(`${thisEmojiOut}/flat.svg`, imgFlat)
  if(!await exists(`${thisEmojiOut}/high-contrast.svg`)) await Bun.write(`${thisEmojiOut}/high-contrast.svg`, imgHighContrast)
})