import http from "http";
import url from "url";
import { promises as fs } from "fs";
import querystring from "querystring";
import cfg from "../config.json";
import sql from "./inc/sql.mjs";
import lib from "./inc/lib.mjs";
import router from "./inc/router.mjs";

(async () => {
  await Promise.all((await fs.readdir("./src/inc/routes"))
    .filter(r => r.endsWith(".mjs"))
    .map(r => import(`./inc/routes/${r}`)));

  http.createServer(async (req, res, r) => {
    const t_start = process.hrtime();
  
    req.url = url.parse(req.url.replace(/(?!^.)(\/+)?$/, ''));
    req.url.split = req.url.pathname.split("/").slice(1);
    req.url.qs = querystring.parse(req.url.query);
  
    req.post = await new Promise((resolve, _, data = "") => req
      .on("data", d => void (data += d))
      .on("end", () => void resolve(Object.fromEntries(Object.entries(querystring.parse(data)).map(([k, v]) => {
        try {
          return [k, decodeURIComponent(v)];
        } catch(err) {
          return [k, v];
        }
      })))));
  
    res.reply = ({
      code = 200,
      type = "text/html",
      body
    }) => res.writeHead(code, { "Content-Type": `${type}; charset=utf-8` }).end(body);
    
    res.redirect = target => res.writeHead(301, {
      "Cache-Control": "no-cache, public",
      "Location": target
    }).end();

    req.cookies = {};
    if(req.headers.cookie) {
      req.headers.cookie.split("; ").forEach(c => {
        const parts = c.split('=');
        req.cookies[parts.shift().trim()] = decodeURI(parts.join('='));
      });
    }

    req.session = false;
    if(req.cookies.session) {
      const user = await sql("user_sessions")
        .select("user.id", "user.login", "user.user", "user.level", "user_sessions.id as sess_id")
        .where("user_sessions.session", lib.md5(req.cookies.session))
        .leftJoin("user", "user.id", "user_sessions.user_id")
        .limit(1);

      if(user.length > 0) {
        req.session = user[0];
        await sql("user_sessions").update("last_used", (Date.now() / 1e3)).where("id", user[0].sess_id);
      }
      else { // delete session
        return res.writeHead(301, {
          "Cache-Control": "no-cache, public",
          "Set-Cookie": "session=; Path=/;  expires=Thu, 01 Jan 1970 00:00:00 GMT",
          "Location": req.url.path
        }).end();
      }
    }
  
    !(r = router.routes.getRoute(req.url.pathname, req.method)) ? res.writeHead(404).end(`404 - ${req.method} ${req.url.pathname}`) : await r(req, res);
    console.log([
      `[${(new Date()).toLocaleTimeString()}]`,
      `${(process.hrtime(t_start)[1] / 1e6).toFixed(2)}ms`,
      `${req.method} ${res.statusCode}`,
      req.url.pathname].map(e=>e.toString().padEnd(15)).join(""));
  }).listen(cfg.websrv.port, () => setTimeout(() => {
    console.log(`f0ck is listening on port ${cfg.websrv.port}.`);
  }, 500));
})();