const { exec } = require("child_process");
const keys = require('./keys')
const fs = require('fs')

var ding, savedLog = [], log = []

function emptyLog(i = 0){
  for(var i=0; i<256; i++){
    log[i] = 0
    savedLog[i] = {
      key: keys[i],
      count: 0
    }
  }
}

function onPress(data){
  data = data.split(' ')
  if(data[1] == 'press'){
    keyCode = data[data.length-2]

    //console.log(`${keys[keyCode]} (${keyCode}): ${log[keyCode]}`)

    log[keyCode] += 1;

    if(typeof keys[keyCode] == 'undefined' || keys[keyCode].split(' ')[0] == '[unknown'){
      console.log(`unknown key pressed: ${keys[keyCode]} (${keyCode})`)
    }
  }
}

function startLog(){
  saveLog()
  ding = exec("xinput test 10")
  ding.stdout.on('data', onPress);
  ding.on('close', startLog)
}

function saveLog(){
  var total = 0, data = { date: new Date().getTime(), log: []};
  console.log('Curent numbers')
  for(var i=0; i<log.length; i++){
    // create data structure to save
    savedLog[i].count += log[i]
    data.log[i].count = {
      key: keys[i],
      count: savedLog[i].count
    }

    // print data to console
    if(log[i] == 0) continue;
    total += log[i]
    console.log(`${keys[i]}: ${log[i]} (${i})`)
  }
  fs.writeFile(`${__dirname}/keystrokes${d.getFullYear()}-${d.getMonth()}-${d.getDate()}.log`, JSON.stringify(data), (err) => {
    if(err) return console.error(err)
  })
  console.log(`total keypresses: ${total}`)
}

function readLog(){
  var d = new Date()
  fs.readFile(`${__dirname}/keystrokes${d.getFullYear()}-${d.getMonth()}-${d.getDate()}.log`, function(err, json){
    if(err) return console.error(err)

    savedLog = JSON.parse(json).log
    console.log(savedLog)
  })
}

emptyLog()
readLog()
startLog()

setInterval(function(){
  ding.kill('SIGTERM')
}, 60*60*1000)