local excluded = {
  ["b7b45b"] = true,
  ["f182ee"] = true,
  ["721ba2"] = true
}

local OFFSETS = {
  left  = { x = 0.00, y = 0, z = 7.67 },
  right = { x = 0.00, y = 0, z = -7.67 },
  up    = { x = 6.54, y = 0, z = 0.00 },
  down  = { x = -6.54, y = 0, z = 0.00 }
}

local UI_offset = 1.15

local buttonParamaters          = {}
buttonParamaters.function_owner = self
buttonParamaters.label          = ""
buttonParamaters.height         = 500
buttonParamaters.width          = 500
buttonParamaters.color          = { 0, 0, 0, 0 }

function onLoad()
  -- index 0: left
  buttonParamaters.click_function = "shift_left"
  buttonParamaters.tooltip        = "Move left"
  buttonParamaters.position       = { -UI_offset, 0, 0 }
  self.createButton(buttonParamaters)

  -- index 1: right
  buttonParamaters.click_function = "shift_right"
  buttonParamaters.tooltip        = "Move right"
  buttonParamaters.position       = { UI_offset, 0, 0 }
  self.createButton(buttonParamaters)

  -- index 2: up
  buttonParamaters.click_function = "shift_up"
  buttonParamaters.tooltip        = "Move up"
  buttonParamaters.position       = { 0, 0, -UI_offset }
  self.createButton(buttonParamaters)

  -- index 3: down
  buttonParamaters.click_function = "shift_down"
  buttonParamaters.tooltip        = "Move down"
  buttonParamaters.position       = { 0, 0, UI_offset }
  self.createButton(buttonParamaters)
end

function shift_left(color) shift(color, "left") end

function shift_right(color) shift(color, "right") end

function shift_up(color) shift(color, "up") end

function shift_down(color) shift(color, "down") end

function shift(color, direction)
  local zone = getObjectFromGUID("a2f932")
  if not zone then
    broadcastToColor("Scripting zone couldn't be found.", color, "Red")
    return
  end

  for _, object in ipairs(zone.getObjects()) do
    if not (excluded[object.getGUID()] or object.hasTag("displacement_excluded")) then
      object.translate(OFFSETS[direction])
    end
  end
end