import fs from 'fs'
import path from 'path'

import type { Config, Dictionary, PlatformConfig } from 'style-dictionary/types'

export function appendAnimations(
  dictionary: Dictionary,
  config: PlatformConfig,
  options: Config,
) {
  if (!config.animationsPath) {
    console.warn('No animationsPath specified in config')
    return
  }
  if (!config.files || config.files.length === 0) {
    console.warn('No output files specified in config')
    return
  }
  if (!config.buildPath) {
    console.warn('No buildPath specified in config')
    return
  }

  const animationsDir = config.animationsPath as string
  const outputFile = config.files[0]?.destination ?? ''
  const cssPath = path.join(config.buildPath, outputFile)

  if (!fs.existsSync(animationsDir)) {
    console.warn(`Animations directory not found: ${animationsDir}`)
    return
  }

  const animationFiles = fs
    .readdirSync(animationsDir)
    .filter(file => file.endsWith('.css'))

  const animations = animationFiles
    .map(file => fs.readFileSync(path.join(animationsDir, file), 'utf8'))
    .join('\n\n')

  const css = fs.readFileSync(cssPath, 'utf8')
  const finalCSS = `${css}\n\n${animations}`

  fs.writeFileSync(cssPath, finalCSS)
}

export function removeAnimations(
  dictionary: Dictionary,
  config: PlatformConfig,
  options: Config,
) {
  if (!config.animationsPath) {
    console.warn('No animationsPath specified in config')
    return
  }
  if (!config.files || config.files.length === 0) {
    console.warn('No output files specified in config')
    return
  }
  if (!config.buildPath) {
    console.warn('No buildPath specified in config')
    return
  }

  const outputFile = config.files[0]?.destination ?? ''
  const cssPath = path.join(config.buildPath, outputFile)

  // erase animations from the file
  const css = fs.readFileSync(cssPath, 'utf8')
  const finalCSS = css.replace(/@keyframes\s+\w+\s*\{[\s\S]*?\}/g, '')

  fs.writeFileSync(cssPath, finalCSS)
}