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', async (req, res) => {
  // Get events
  let eventsReq = await fetch(new URL("events/events.json", config.data_url));
  let events;
  if (eventsReq.ok)
    events = await eventsReq.json();
  else
    return res.status(400).send("Bad Request");

  // Get localization
  let l10nReq = await fetch(new URL(`localization/${req.params.lang}.json`, config.data_url));
  let l10n;
  if (l10nReq.ok)
    l10n = await l10nReq.json();
  else
    return res.status(404).send("Localization not found!");

  // Merge events and localization
  const merged = events.map(event => {
    const localizationKey = l10n.__events[event.id];
    return {
      ...event,
      ...localizationKey
    };
  });

  return res.send(merged);
})

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

  // Get localization
  let l10nReq = await fetch(new URL(`localization/${req.params.lang}.json`, config.data_url));
  let l10n;
  if (l10nReq.ok)
    l10n = await l10nReq.json();
  else
    return res.status(404).send("Localization not found!");

  const clippedEvents = events.filter((event) => event.where.layer == req.params.layer).map((event) => {
    event.where = event.where.room;
    return event;
  });

  // Merge events and localization
  const merged = clippedEvents.map(event => {
    const localizationKey = l10n.__events[event.id];
    return {
      ...event,
      ...localizationKey
    };
  });

  return res.send(merged);
})

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

  // Get localization
  let l10nReq = await fetch(new URL(`localization/${req.params.lang}.json`, config.data_url));
  let l10n;
  if (l10nReq.ok)
    l10n = await l10nReq.json();
  else
    return res.status(404).send("Localization not found!");

  // Merge layers and localization
  const merged = layers.map(layer => {
    const localizationKey = l10n.__layers[layer.id];
    return {
      ...layer,
      ...localizationKey
    };
  });

  return res.send(merged);
})

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

  // Get localization
  let l10nReq = await fetch(new URL(`localization/${req.params.lang}.json`, config.data_url));
  let l10n;
  if (l10nReq.ok)
    l10n = await l10nReq.json();
  else
    return res.status(404).send("Localization not found!");

  // Merge rooms and localization
  const merged = rooms.map(room => {
    const localizationKey = l10n.__rooms[room.id];
    return {
      ...room,
      ...localizationKey
    };
  });

  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()}`)
})