local rs = {}

rs.listenInput = function(side, onChangeCallback)
  local state = redstone.getInput(side)

  while true do
    os.pullEvent('redstone')
    local newState = redstone.getInput(side)

    if state ~= newState then
      state = newState
      onChangeCallback(newState)
    end
  end
end

rs.createBundledOutput = function(side, initialColorState)
  local bundledOutput = {}

  local _colorState = initialColorState or 0

  local function getState()
    return _colorState
  end

  local function setState(newColorState)

    if newColorState == _colorState then
      return false
    end

    _colorState = newColorState
    redstone.setBundledOutput(side, newColorState)

    return true
  end

  bundledOutput.getStateColor = getState
  bundledOutput.setColorState = setState

  bundledOutput.test = function(color)
    return colors.test(getState(), color)
  end

  bundledOutput.setOn = function(color)
    local colorState = getState()
    local newColorState = colors.combine(colorState, color)
    return setState(newColorState)
  end

  bundledOutput.setOff = function(color)
    local colorState = getState()
    local newColorState = colors.subtract(colorState, color)
    return setState(newColorState)
  end

  bundledOutput.toggle = function(color)
    if colors.test(getState(), color) then
      return bundledOutput.setOff(color)
    end

    return bundledOutput.setOn(color)
  end

  return bundledOutput
end

return rs