import type { NextApiHandler } from "next"

import markdown from "@lib/render-markdown"

const renderMarkdown: NextApiHandler = async (req, res) => {
  const { content, title } = req.body
  const renderAsMarkdown = [
    "markdown",
    "md",
    "mdown",
    "mkdn",
    "mkd",
    "mdwn",
    "mdtxt",
    "mdtext",
    "text",
    ""
  ]
  const fileType = () => {
    const pathParts = title.split(".")
    const language = pathParts.length > 1 ? pathParts[pathParts.length - 1] : ""
    return language
  }
  const type = fileType()
  let contentToRender: string = content || ""

  if (!renderAsMarkdown.includes(type)) {
    contentToRender = `~~~${type}
${content}
~~~`
  } else {
    contentToRender = "\n" + content
  }

  if (typeof contentToRender !== "string") {
    res.status(400).send("content must be a string")
    return
  }
  res.status(200).write(markdown(contentToRender))
  res.end()
}

export default renderMarkdown