const express = require('express');
const bodyParser = require('body-parser');
const fs = require('fs');
const path = require('path');

const app = express();
app.use(express.static('website'));
app.use(bodyParser.json());       
app.use(bodyParser.urlencoded({extended: true})); 

function getDateStampString()
{
  const todaysDate = new Date()
  const currentYear = todaysDate.getFullYear()
  
  const year = "" + todaysDate.getFullYear();
  
  let month = "" + todaysDate.getMonth();
  if( month.length == 1 )
    month = "0" + month;

  let day = "" + todaysDate.getDate();
  if( day.length == 1 )
    day = "0" + day;

  return "" + year + "_" + month + "_" + day;
}

app.post(`/${process.env.SECRET_KEY}/set/:gameId/`, function(req, res)
{
  const approot = "./";
  const gameDir = path.join(approot, "logs", req.params.gameId);
  
  // create game floder if it doesn't exist
  if( !fs.existsSync(gameDir) )
    fs.mkdirSync(gameDir);    
  
  // calculate log file name corresponding to today's date
  const logFileName = getDateStampString() + ".log";
  console.log( logFileName );
  
  
  const payload = req.body.payload;
  if( payload == undefined )
  {
    res.end();
    return;
  }

  
  let logArray = [];
  
  if( !Array.isArray(payload) )
    logArray = [payload];
  else
    logArray = payload;


  let logString = "";

  for( var i=0; i<logArray.length; i++ )
  {
    try
    {
      const payloadString = JSON.stringify( logArray[i] );
      logString += payloadString + "\n";
    }
    catch(err){}
  }

 
  fs.appendFile(path.join(gameDir, logFileName), logString, function()
  {
    res.end();    
  });
    
});


app.get(`/${process.env.SECRET_KEY}/get/:gameId/:logFileName/`, function(req, res)
{
  const approot = "./";
  const gameDir = path.join(approot, "logs", req.params.gameId);

  res.download( path.join(gameDir, req.params.logFileName) )
});


const listener = app.listen(process.env.PORT, function() {
  console.log('Your app is listening on port ' + listener.address().port);
});