const fs = require('fs').promises;
const conf = require('../conf');

const playerListDir = conf.playerListDir;

function getFormattedDate() {
  const months = [
    'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
    'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'
  ];

  const currentDate = new Date();
  const year = currentDate.getUTCFullYear();
  const month = months[currentDate.getUTCMonth()];
  const day = currentDate.getUTCDate().toString().padStart(2, '0');

  return `${month}-${day}-${year}`;
}

function millisecondsUntilAMUTC() {
  const now = new Date();
  const utcMidnight = Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate() + 1, 0, 0, 0); // Next UTC midnight

  const millisecondsUntilMidnightUTC = utcMidnight - now.getTime();
  return millisecondsUntilMidnightUTC;
}

async function currentListedPlayers(file){
  try{
    let res = await fs.readFile(`${playerListDir}/${file}`);
    return res.toString().split('\n');
  }catch(error){
    return [];
  }
}

async function updateListFile(file, players){
  try{
    fs.writeFile(`${playerListDir}/${file}`, players)
  }catch(error){
    console.error('Unkown error writting player file')
  }
}

let addLock = false;
let toAddList = [];

async function addPlayer(playerName){
  if(addLock){
    toAddList.push(playerName);
    return ;
  }

  addLock = true

  let now = getFormattedDate();
  let current = await currentListedPlayers(now)
  if(!current.includes(playerName)){
    current.push(playerName)
    await updateListFile(now, current.join('\n'))
  }

  addLock = false;

  if(toAddList.length){
    await addPlayer(toAddList.shift());
  }
}


function onJoin(bot){
  bot.bot.on('playerJoined', async function(player){
    await addPlayer(player.username);
  });
}


function doMidnight(bots){
  let later = millisecondsUntilAMUTC();
  setTimeout(function(){

  }, later)
}

module.exports = {onJoin, doMidnight};