import express from 'express';

import config from "../eventmapper_config.json" with { type: "json" };

const app = express();

app.use("/assets", express.static('assets'));

app.use("/", express.static('pages'));

app.use("/dataServer", express.static('data')); // Example data file-server

app.get('/data/:lang/events/:floor', async (req, res) => {
  // Get events
  let eventsReq = await fetch(new URL(`events/${req.params.floor}.json`, config.data_url));
  let events;
  if (eventsReq.ok)
    events = await eventsReq.json();
  else
    return res.status(400).send("Bad Request");

  // Merge events and localization
  const lang = req.params.lang;
  const merged = events.map(event => {
    event.name = event.lang[lang]?.name ?? "";
    event.description = event.lang[lang]?.description ?? "";
    event.url = event.lang[lang]?.url ?? "";
    delete event.lang;
    return event;
  });

  return res.send(merged);
})

app.get('/data/:lang/floors', async (req, res) => {
  // Get layers
  let layersReq = await fetch(new URL("floors.json", config.data_url));
  let layers;
  if (layersReq.ok)
    layers = await layersReq.json();
  else
    return res.status(400).send("Bad Request");

  // Merge layers and localization
  const lang = req.params.lang;
  const merged = layers.map(layer => {
    layer.name = layer.lang[lang]?.name ?? "";
    layer.description = layer.lang[lang]?.description ?? "";
    delete layer.lang;
    return layer;
  });

  return res.send(merged);
})

app.get('/data/:lang/rooms/:floor', async (req, res) => {
  // Get rooms
  let roomsReq = await fetch(new URL(`rooms/${req.params.floor}.json`, config.data_url));
  let rooms;
  if (roomsReq.ok)
    rooms = await roomsReq.json();
  else
    return res.status(400).send("Bad Request");

  // Merge rooms and localization
  const lang = req.params.lang;
  const merged = rooms.map(room => {
    room.name = room.lang[lang]?.name ?? "";
    room.description = room.lang[lang]?.description ?? "";
    delete room.lang;
    return room;
  });

  return res.send(merged);
})

app.listen(config.port, () => {
  const listeningURL = new URL("http://localhost/");
  listeningURL.port = config.port;
  console.log(`Example app listening on ${listeningURL.toString()}`)
})

export default app;