import marked from "marked";
import express from "express"
import ejs from "ejs";
import fs from "fs";
import path from "path";
import jsdom from "jsdom";
import config from "./config.json"

let app = express();

// set view engine to ejs
app.set("view engine", "ejs")
app.set('views', path.join(__dirname, 'templates'))

// type for post object
type Post = {
  file: string;
  title: string;
  parsedPost: string;
  rawPost: string;
  metadata: fs.Stats;
}

// html stripper, used for title
async function htmlstripper(html: string){
  return new jsdom.JSDOM(html).window.document.body.textContent || " ";
}

// returns Post array
async function contentScan(){
  let posts: Post[] = []
  let postsDir = path.join(__dirname, "posts")
  let files = await fs.readdirSync(postsDir).filter((name: string) => name.toLowerCase().endsWith(".md"))
  for (const file of files) {
    let postPath = path.join(postsDir, file)
    let metadata = fs.statSync(postPath)
    let postContent = fs.readFileSync(postPath, "utf-8")
    posts.push(
      {
        file: file, 
        title: await htmlstripper(
          await marked.parse(
            postContent.split("\n")[0]
          )
        ), 
        metadata: metadata,
        parsedPost: await marked.parse(postContent), 
        rawPost: postContent
      }
    )
  }
  return posts;
}

app.get("/", async (req:express.Request,res:express.Response) => {
  res.render("index", {posts: (await contentScan()), config: config})
});

app.use("/post/:post", async (req:express.Request,res:express.Response) => {
  let pathToPost = path.join(__dirname, "posts", req.params.post);
  if(!fs.existsSync(pathToPost)) return res.end("404.");
  let posts = await contentScan();
  let post = posts.filter(post => post.file === req.params.post)
  if(!post[0]) return res.end("404.")
  res.render("post", {posts: posts, post: post[0], config: config})
})

app.listen(3024)