oil_control

local zonePercent = 20
local redPos = 'bottom'
local bankPos = 'right'
local monPos = 'top'

local bank = peripheral.wrap(bankPos)
local mon = peripheral.wrap(monPos)
local state = false

function changeStateIfNeeded()
  local energy = bank.getEnergyStored()
  local maxEnergy = bank.getMaxEnergyStored()
  local topLimit = maxEnergy - 5000
  local botLimit = topLimit * (
    1 - (zonePercent/100)
  )

  if energy < botLimit then
    state = true
  elseif energy > topLimit then
    state = false
  end

  redstone.setOutput(redPos, state)
end

function showInfo()
  term.setCursorPos(1,1)
  mon.setCursorPos(1,1)
--  term.clearLine()
  local energy = bank.getEnergyStored()
  local s = "Energy: "..energy.."         "
  term.write(s)
  mon.write(s)

  term.setCursorPos(1,2)
  mon.setCursorPos(1,2)
--  term.clearLine()
  local status = "charging"
  if not state then
    status = "dis"..status
  end
  s = "Status: "..status

  term.write(s)
  mon.write(s)

  term.setCursorPos(1,3)
  mon.setCursorPos(1,3)
end

--for t = 0, 100 do
while true do
  changeStateIfNeeded()
  showInfo()
end