Test 4

--This code is designed to leave the reactor on all the times and maintain
--power levels by adjusting the control rod insertion

--return a integar ignoring any remainder
function DIV(a,b)
    return (a - (a % b)) / b
end

--the total size of the buffer
local TOTAL_MAX = 10000000
--the amount of power we want to maintain in the buffer
local TARGET_AMOUNT = 5000000
--the default insertion of control rods
local controlLevel = 50
--Buffer zone size
local BUFFER_SIZE = 1000000

--connect to reactor
local reactor = peripheral.wrap("back")

--confirm connection
if(not reactor.getConnected) then
    print("Not connected to Reactor")
end

--turn the reactor on
if(not reactor.getActive()) then
    reactor.setActive(true)
    print("Starting Reactor")
end

--move control rod to defaul level
reactor.setAllControlRodLevels(controlLevel)


while(true) do


    --find the current amount of energy in the buffer
    local prevEnergy = reactor.getEnergyStored()

    sleep(3)

    local currentEnergy = reactor.getEnergyStored()


    if (currentEnergy > prevEnergy ) then
        local direction = 2
        local distance = (currentEnergy - prevEnergy)
        print("Greater than")
    elseif (currentEnergy < prevEnergy ) then
        local direction = 1
        local distance = (prevEnergy - currentEnergy)
        print("Less than")
    elseif (prevEnergy == currentEnergy ) then
        local direction = 0
        local distance = 0
    end

    print("prevEnergy: ", currentEnergy)
    print("currentEnergy:  ", currentEnergy)
    print("Direction: ", direction)
    print("Distance:  ", distance)

    --if above middle buffer
    if (currentEnergy > TARGET_AMOUNT + (BUFFER_SIZE / 2) ) then
        --if in top buffer
        if currentEnergy > (TOTAL_MAX - BUFFER_SIZE) then
            controlLevel = controlLevel + 50
        --if moving in wrong direction
        elseif direction == (2) then
            controlLevel = controlLevel + DIV(distance, 100000)
        end

    --if below middle buffer
    elseif (currentEnergy < TARGET_AMOUNT - (BUFFER_SIZE / 2) ) then
        --if in bottom buffer
        if currentEnergy < BUFFER_SIZE then
            controlLevel = controlLevel - 50
        --if moving in wrong direction
        elseif direction == (1) then
            controlLevel = controlLevel - DIV(distance, 100000)
        end

    end

    if (controlLevel < 0) then
        controlLevel = 0
    elseif (controlLevel > 100) then
        controlLevel = 100
    end

    reactor.setAllControlRodLevels(controlLevel)
    print("Control Level: %d", controlLevel)

end