var factorys = []

var items = []

var time = 0
var timestep = 1000 / 48
var delta = 0
var lastFrameTimeMs = 0
var ctx = {}
var currentFactory = 0
var fulltime = 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() {
  fulltime++
  ctx.clearRect(0, 0, innerWidth, innerHeight)
  var tilesToRender = factorys[currentFactory].getTiles()
  //Hier wird das Spiel gerendert
  //RENDER TILE-LAYER0
  for (var i = 0; i < tilesToRender.length; i++) {
    var tile = tilesToRender[i]
    var img = new Image
    img.src = "images/tiles/"+tile.name+"0"+tile.nextFrame(fulltime)+".png"
    img.style = "-ms-transform: rotate("+directions[tile.direction].degree+"deg);-webkit-transform: rotate("+directions[tile.direction].degree+"deg);transform: rotate("+directions[tile.direction].degree+"deg);"
    ctx.drawImage(img,tile.x*48,tile.y*48,48,48)
  }
  //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
}