var factorys = []

var items = []

var time = 0
var timestep = 1000 / 48
var delta = 0
var lastFrameTimeMs = 0
var ctx = {}
var currentFactory = 0

$(document).ready(function() {
  loadGameData()
  loadItems()
  prepairRender()
  requestAnimationFrame(loop)
})

function loadGameData() {
  //TODO: Check for Cookies
  factorys.push(new Factory())
}

function loadItems(){
  var itemRequest = new XMLHttpRequest();
  itemRequest.open('GET', 'js/items.json', false)
  itemRequest.send(null)
  var json = JSON.parse(itemRequest.responseText)
  items = json.items
}

function loop(timestamp) {
  //Check Gametick Rate
  if (timestamp < lastFrameTimeMs + (1000 / 48)) {
    requestAnimationFrame(loop)
    return;
  }
  delta += timestamp - lastFrameTimeMs;
  lastFrameTimeMs = timestamp;

  var numUpdateSteps = 0
  while (delta >= timestep) {
    gametick(timestep)
    delta -= timestep
    if (++numUpdateSteps >= 240) {
      delta = 0
      break;
    }
  }
  render();
  requestAnimationFrame(loop);
}

function gametick(timestep) {
  //time gibt an in den Wievielten von 40 Ticks man sich befindet
  time ++
  time = time%48
  //Wird 40 mal in einer Sekunde aufgerufen
  for(var i=0;i<factorys.length;i++){
    factorys[i].moveItems()
  }

  if(time%24==0){
    for(var i=0;i<factorys.length;i++){
      factorys[i].workTiles()
    }
  }
}

function render() {
	ctx.clearRect(0,0,innerWidth,innerHeight)
  //Hier wird das Spiel gerendert
  //RENDER TILE-LAYER0

  //RENDER Items
  for (var i = 0; i < factorys[currentFactory].items.length; i++) {
    var item = factorys[currentFactory].items[i]
    var img = new Image
    img.src = "images/items/"+getItemFormId(item.id).name+".png"
    ctx.drawImage(img,item.x,item.y,48,48)
  }
  //RENDER TILE-LAYER1

}

function getItemFormId(id){
  for(var i=0;i<items.length;i++){
    if(items[i].id == id){
      return items[i]
    }
  }
}

function prepairRender(){
  var canvas = $('canvas')[0];
  ctx = canvas.getContext('2d')
  canvas.width = 1200
  canvas.height = 576
}