(function() {


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var canvas = document.getElementById('place-canvasse');
var container = document.getElementById('place-container');

var select_color = function(index) {
  var colored_square = document.getElementsByClassName('place-swatch')[index];
  colored_square.dispatchEvent(make_event('click', 0, 0, 0));
};

var get_place_coordinates = function() {
  var coord_string = document.getElementById('place-camera').style.transform;
  var paren_index = coord_string.indexOf('(');
  var comma_index = coord_string.indexOf(',');
  var px_index    = coord_string.indexOf('px', comma_index);
  var x = parseInt(coord_string.substring(paren_index+1, comma_index));
  var y = parseInt(coord_string.substring(comma_index+2, px_index));

  x = 500.0 - x;
  y = 500.0 - y;

  return {x:x,y:y};
};

var make_event = function(type, button, x, y) {
  var rect = container.getBoundingClientRect();
  x += rect.left;
  y += rect.top;

  var ev = document.createEvent('MouseEvent');
  ev.initMouseEvent(type,true,true,window,1,0,0,x,y,false,false,false,false,0,null);
  return ev;
};
var send_event = function(ev) {
  canvas.dispatchEvent(ev);
};

// Look at the existing canvas to find pixels that should be changed
var X = 517;
var Y = 139;
var W = 55;
var H = 10;
var game_data;

// Returns a color-index value if the pixel should be changed, otherwise null
var check_pixel = function(x, y) {
  var k = 4*x + 4*W*y;
  if(     game_data[k  ] !== data[k  ]
      ||  game_data[k+1] !== data[k+1]
      ||  game_data[k+2] !== data[k+2] ) {
    if(data[k] === 34)  // Black
      return 3;
    else  // Orange
      return 6;
  }
  return null;
};

var do_a_pixel = function() {

// Find a pixel that needs to be changed
game_data = canvas.getContext('2d').getImageData(X, Y, W, H).data;
var i = null;
var j = null;
var color_index = null;
// Try searching randomly at first
for(var n=0; n<100; ++n) {
  j = Math.floor(Math.random() * W);
  i = Math.floor(Math.random() * H);
  color_index = check_pixel(j, i);
  if(color_index !== null) {
    console.log('Found a pixel randomly');
    break;
  }
}
if(color_index === null) {  // Haven't found one yet; search linearly now
  for(i=0; i<H; ++i) {
    var should_break = false;

    for(j=0; j<W; ++j) {
      color_index = check_pixel(j, i);
      if(color_index !== null) {
        console.log('Found a pixel linearly');
        should_break = true;
        break;
      }
    }

    if(should_break)
      break;
  }
}

if(color_index === null) {
  console.log('No pixels need to be changed');
  return false;
}

var px = j + X;
var py = i + Y;

console.log('Trying to set ' + px + ' ' + py + ' to ' + color_index);

// Right click to cancel the paintbrush, if necessary
send_event(make_event('contextmenu', 2, 10, 10));

// Right click again to zoom in, if necessary
if(document.getElementsByClassName('place-zoomed-out').length === 1)
  send_event(make_event('contextmenu', 2, 10, 10));

setTimeout(function() {

var coord = get_place_coordinates();
var x = coord.x;
var y = coord.y;

// Scroll to origin
send_event(make_event('mousemove', 0, 0     , 0   ));
send_event(make_event('mousedown', 0, 0     , 0   ));
send_event(make_event('mousemove', 0, x*40  , y*40));
send_event(make_event('mouseup'  , 0, x*40  , y*40));

// Scroll to Factorio
send_event(make_event('mousemove', 0, px*40, py*40));
send_event(make_event('mousedown', 0, px*40, py*40));
send_event(make_event('mousemove', 0, 0    , 0    ));
send_event(make_event('mouseup'  , 0, 0    , 0    ));

// Get coordinates of center of canvas.
var rect = container.getBoundingClientRect();
x = (rect.right-rect.left)/2;
y = (rect.bottom-rect.top)/2;

select_color(color_index);

send_event(make_event('mousemove', 0, x, y));
// Something weird about the coordinates ...
x -= 20;
y -= 40;
send_event(make_event('mousedown', 0, x, y));
send_event(make_event('mouseup'  , 0, x, y));

}, 1000);

return true;

};


var f = function() {
  do_a_pixel();
  setTimeout(f, 30000);
};
f();


}());