import { loader } from 'webpack'
import LRU from 'lru-cache'
import hash from 'hash-sum'
import markdownIt from './markdown'

const cache = new LRU({ max: 1000 })

export default function (this: loader.LoaderContext, markdown: string) {
  // Check cache
  const key = hash(this.resourcePath + markdown)
  if (cache.has(key)) {
    return cache.get(key)
  }

  // Parse markdown
  const md = markdownIt()
  const parsedContent = md.render(markdown)
  cache.set(key, parsedContent)

  return parsedContent
}