//dotenv
require('dotenv').config();

//nextcloud client
const { Client, Server } = require("nextcloud-node-client");
const server = new Server({
  basicAuth: {
    password: process.env.nextcloud_PASSWD,
    username: process.env.nextcloud_ID,
  },
  url: process.env.nextcloud_URL,
});

//built-in
const path = require("path");
const fs = require('fs')
const util = require('util')
const { pipeline } = require('stream')
const pump = util.promisify(pipeline)

//uuid
const {
  v1: uuidv1,
  v4: uuidv4,
} = require('uuid');

//moment
const moment = require("moment-timezone");

//fastify
const fastify = require("fastify")({
  logger: false,
});
fastify.register(require("fastify-static"), {
  root: path.join(__dirname, "public"),
  prefix: "/"
});
fastify.register(require("fastify-formbody"));
fastify.register(require("fastify-multipart"));
fastify.register(require("point-of-view"), {
  engine: {
    handlebars: require("handlebars")
  }
});

//socket.io
var io = require("socket.io")(fastify.server, {
  pingInterval: 1000,
  pingTimeout: 3000
});

//'get'
fastify.get("/", function (request, reply) {
  reply.view("/src/pages/parade.hbs", {});
});

["/entry", "/entry/"].forEach(function(path) {
  fastify.get(path, function (request, reply) {
    reply.view("/src/pages/entry.hbs", {});
  });
});

//'post'
fastify.post("/", async function (request, reply) {

  // -- "accumulate whole file in memory"
  const data = await request.file()
  const buffer = await data.toBuffer()
  // <<< https://github.com/fastify/fastify-multipart/#accumulate-whole-file-in-memory
  // ^--- this is needed.. dont understand fully, though. related to 'stream' receiving.

  const client = new Client(server);

  //create unique folder ==> timestamp + uuid
  const folder = await client.createFolder("Storage/sound-parade/" + moment().tz('Asia/Seoul').format('YYYYMMDD-HHmmss - ') + uuidv1());

  //files
  console.log(data.fields.audiofile);
  const file = await folder.createFile(data.fields.audiofile.filename, await data.fields.audiofile.toBuffer());
  console.log(data.fields);
  const text = await folder.createFile("message.txt", Buffer.from(data.fields.message.value));
  console.log(data.fields.pixels);
  const image = await folder.createFile(data.fields.pixels.filename, await data.fields.pixels.toBuffer());

  reply.view("/src/pages/entry.hbs", {});
});

//
var score = require("./public/score.json");

//
//there will be 16 rooms called: "room0", "room1", ... , "room15"
//if any other room is requested.. well, we will simply reject.
var roommax = 16;

//
io.on("connection", function(socket) {
  console.log("someone connected.");
  socket.on("disconnect", function() { console.log("someone disconnected."); });

  socket.on("room", function(room, fn) {
    // parseInt(room)
    if (room >= 0 && room < roommax) {
      socket.join("room" + room);
      fn(true);
    } else {
      fn(false);
    }
  });
});

//
var pointer = 0; // pointer : 0 ~ (length-1)
var looper;
(looper = function(timeout) {
  setTimeout(function() {

    //pointer = 20;
    // console.log(score[pointer]);

    //
    for (var index = 0; index < roommax; index++) {

      // NOTE: 'pointer' must be 'remembered' since 'pointer' will increase almost immediately! pass as argument => 'pointed'
      // NOTE: 'index' is same => 'indexed'
      setTimeout(function(pointed, indexed) {

        io.to("room" + indexed).emit("post", score[pointed]);

      }, score[pointer].object.showtime * index, pointer, index);
    }

    var timegap = score[pointer].timegap.base + Math.random()*score[pointer].timegap.random;
    // console.log(timegap);

    pointer++;
    if (pointer >= score.length) pointer = 0;

    looper(timegap);
  }, timeout);
})(1000);

//listen
fastify.listen(10000, function (err, address) {
  if (err) {
    fastify.log.error(err)
    process.exit(1)
  }
  console.log(`Your app is listening on ${address}`)
  fastify.log.info(`server listening on ${address}`)
});