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 cssDir = './css'
if(!await exists(cssDir)) await mkdir(cssDir)

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) => {
    let key = path.parse(filename).name.toLowerCase()//.replace(/[\(\)'’“”]/g, '')
    animatedList.set(key, `${catDir}/${filename}`)
  })
}
const rootURL = process.env.ROOT_URL || "https://flumoji.pages.dev/emoji/"
const cssRules = {
  animated: [] as string[],
  threeD: [] as string[],
  color: [] as string[],
  flat: [] as string[],
  highContrast: [] as string[]
}

await Promise.all(fluentList.map(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 = metadata.tts.toLowerCase().replace(/[:]/g, '')
  // if(metadata.unicodeSkintones) title += ' Light Skin Tone'

  let imgAnimPath = animatedList.get(title)
  const img3DPath = `${in3d}/${(await readdir(in3d))[0]}`
  const imgColorPath = `${inColor}/${(await readdir(inColor))[0]}`
  const imgFlatPath = `${inFlat}/${(await readdir(inFlat))[0]}`
  const imgHighContrastPath = `${inHighContrast}/${(await readdir(inHighContrast))[0]}`

  if(!imgAnimPath){
    // hard-coded matches:
    switch(title){
      case 'keycap 0': imgAnimPath = animatedList.get("keycap digit zero"); break;
      case 'keycap 1': imgAnimPath = animatedList.get("keycap digit one"); break;
      case 'keycap 2': imgAnimPath = animatedList.get("keycap digit two"); break;
      case 'keycap 3': imgAnimPath = animatedList.get("keycap digit three"); break;
      case 'keycap 4': imgAnimPath = animatedList.get("keycap digit four"); break;
      case 'keycap 5': imgAnimPath = animatedList.get("keycap digit five"); break;
      case 'keycap 6': imgAnimPath = animatedList.get("keycap digit six"); break;
      case 'keycap 7': imgAnimPath = animatedList.get("keycap digit seven"); break;
      case 'keycap 8': imgAnimPath = animatedList.get("keycap digit eight"); break;
      case 'keycap 9': imgAnimPath = animatedList.get("keycap digit nine"); break;
      case 'keycap #': imgAnimPath = animatedList.get("keycap number sign"); break;
      case 'keycap *': imgAnimPath = animatedList.get("keycap asterisk"); break;
      case 'pouting face': imgAnimPath = animatedList.get("enraged face"); break;
      default: console.warn(`could not find animated ${metadata.glyph} ${title}. Defaulting to 3D version: ${img3DPath}`)
    }
    
  }

  const imgAnim = Bun.file(imgAnimPath || img3DPath)
  const img3d = Bun.file(img3DPath)
  const imgColor = Bun.file(imgColorPath)
  const imgFlat = Bun.file(imgFlatPath)
  const imgHighContrast = Bun.file(imgHighContrastPath)

  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)

  const cssRule = `[alt|="${metadata.glyph}"]{ content: url(${rootURL}${metadata.glyph}/{file}); }`


  cssRules.animated.push(cssRule.replace("{file}", "animated.png"))
  cssRules.threeD.push(cssRule.replace("{file}", "3d.png"))
  cssRules.color.push(cssRule.replace("{file}", "color.svg"))
  cssRules.flat.push(cssRule.replace("{file}", "flat.svg"))
  cssRules.highContrast.push(cssRule.replace("{file}", "high-contrast.svg"))
}))

const cssAnim = Bun.file(path.join(cssDir, 'animated.css'))
const css3d = Bun.file(path.join(cssDir, '3d.css'))
const cssColor = Bun.file(path.join(cssDir, 'color.css'))
const cssFlat = Bun.file(path.join(cssDir, 'flat.css'))
const cssHighContrast = Bun.file(path.join(cssDir, 'high-contrast.css'))

await Bun.write(cssAnim, cssRules.animated.join('\n'))
await Bun.write(css3d, cssRules.threeD.join('\n'))
await Bun.write(cssColor, cssRules.color.join('\n'))
await Bun.write(cssFlat, cssRules.flat.join('\n'))
await Bun.write(cssHighContrast, cssRules.highContrast.join('\n'))