items = { }     -- Global variable, reusable container for findGlobalObjects.  Reusing this table avoids costs of
                -- constructing and destructing it every time we call findGlobalObjects().  Be sure to clear the
                -- table before reusing it!

bot = nil

function generateItem(num, x, y)
  local obj1
  if     num == 0 then obj1 = Asteroid.new()
  elseif num == 1 then obj1 = Mine.new()
  elseif num == 2 then obj1 = FlagItem.new()
  elseif num == 3 then obj1 = SpyBug.new()
  end
  obj1:setLoc(point.new(x, y))
  levelgen:addItem(obj1)
  return obj1
end


function onPlayerJoined(something, playerinfo)
  if bot == nil then
    unsubscribe(Event.PlayerJoined)
    bot = playerinfo:getShip()
    return
  end

end

function onShipEnteredZone(ship, zone, zoneType, zoneId)

  table.clear(items)
  bot:findGlobalObjects(items, ObjType.Flag)       -- Returns a list of all items of type objType in the game

  for index, item in ipairs(items) do         -- Iterate through all found items
    local l = item:getLoc()
    generateItem(3, l.x, l.y)
  end
end

function onTick(timePassed)
  if bot == nil then
    subscribe(Event.PlayerJoined)
    levelgen:addLevelLine("Robot")
  end
end

function main()
  subscribe(Event.tick)
  subscribe(Event.ShipEnteredZone)
end