cleanGoldSlot= 5
dirtyGoldSlot= 6
goldOreSlot = 7
reducedGoldChunksSlot = 8
emptyBucketSlot = 13
sludge = 14
filledBucketSlot = 15

function compare()

    turtle.select(1)

    if turtle.compareTo(cleanGoldSlot) then
        turtle.transferTo(cleanGoldSlot,64)
    elseif turtle.compareTo(emptyBucketSlot) then
        turtle.transferTo(emptyBucketSlot,64)
    elseif turtle.compareTo(sludge) then
        turtle.transferTo(sludge,64)
    elseif turtle.compareTo(dirtyGoldSlot) then
        turtle.dropDown()
    end
end

function fillBucket()
    if turtle.getItemCount(emptyBucketSlot) > 1 then
        turtle.select(emptyBucketSlot)
        turtle.forward()
        turtle.placeDown()
        turn180()
        turtle.forward()
        turn180()
        turtle.select(1)
    end
end

function supplyBucket()
    if turtle.getItemCount(filledBucketSlot) == 1 then
        turtle.select(filledBucketSlot)
        turtle.dropDown()
        turtle.select(1)
    end
end

function moveToSlagFurnace()
    turn180()
    for i=1,2 do
        turtle.forward()
    end
end

function moveToSlagFurnaceOutput()
    moveToSlagFurnace()
    turtle.turnLeft()
    turtle.forward()
    turtle.down()
    turn180()
end

function resetPositionFromSlagFurnaceOutput()
    turtle.up()
    turtle.forward()
    turtle.turnRight()
    for i=1,2 do
        turtle.forward()
    end
end

function resetPositionFromSlagFurnace()
    turn180()
    for i=1,2 do
        turtle.forward()
    end
end

function deliverCleanChunks()
    moveToSlagFurnace()
    turtle.select(cleanGoldSlot)
    while turtle.getItemCount(cleanGoldSlot) > 1 do
        turtle.dropDown(1)
    end
    resetPositionFromSlagFurnace()
    turtle.select(1)
end

function turn180()
    for i=1,2 do
        turtle.turnLeft()
    end
end

function moveToMixerOutput()
    turtle.forward()
    turtle.down()
    turn180()
end

function resetPositionFromMixerOutput()
    turtle.up()
    turtle.forward()
    turn180()
end

function grabChestContents()
    if turtle.getItemCount(goldOreSlot) == 0 then
        turtle.select(goldOreSlot)
        turtle.turnLeft()
        turtle.suck(64)
        turtle.turnRight()
        turtle.select(1)
    end
end

function goToGrinderInput()
    turn180()
    turtle.forward()
end

function resetPositionFromGrinderInput()
    turn180()
    turtle.forward()
end

function deployOreInGrinder()
    turtle.select(goldOreSlot)
    turtle.dropDown()
    turtle.select(1)
end

function goToGrinderOutput()
    turn180()
    turtle.forward()
    turtle.turnLeft()
    turtle.forward()
    turtle.down()
    turn180()
end

function resetPositionFromGrinderOutput()
    turtle.up()
    turtle.forward()
    turtle.turnRight()
    turtle.forward()
end

function grabContentsFromGrinderOutput()
    goToGrinderOutput()
    turtle.select(dirtyGoldSlot)
    turtle.suck()
    turtle.select(1)
    resetPositionFromGrinderOutput()
end

function grabContentsFromSlagFurnaceOutput()
    moveToSlagFurnaceOutput()
    turtle.select(reducedGoldChunksSlot)
    turtle.suck()
    resetPositionFromSlagFurnaceOutput()
    turtle.select(1)
end

function moveToCrystalInput()
    turn180()
    for i=1,4 do
        turtle.forward()
    end
    turtle.turnLeft()
    turtle.forward()
    turtle.down()
    turn180()
end

function resetPositionFromCrystalInput()
    turtle.up()
    turtle.forward()
    turtle.turnRight()
    for i=1,4 do
        turtle.forward()
    end
end

function deployToCrystal()
    moveToCrystalInput()
    turtle.select(reducedGoldChunksSlot)
    turtle.dropDown()
    turtle.select(1)
    resetPositionFromCrystalInput()
end

function deployDirtyGold()
    turtle.select(dirtyGoldSlot)
    turtle.dropDown()
    turtle.select(1)
end


while 0 == 0 do
    turtle.select(1)
    grabChestContents()
    goToGrinderInput()
    deployOreInGrinder()
    resetPositionFromGrinderInput()
    moveToMixerOutput()
    turtle.select(1)
    for i=1,4 do
        turtle.suck()
        compare()
    end
    resetPositionFromMixerOutput()
    fillBucket()
    supplyBucket()
    if turtle.getItemCount(cleanGoldSlot) > 1 then
        deliverCleanChunks()
    end

    grabContentsFromGrinderOutput()

    grabContentsFromSlagFurnaceOutput()
    deployDirtyGold()

    moveToCrystalInput()
    turtle.select(reducedGoldChunksSlot)
    turtle.drop()
    turtle.select(1)
    resetPositionFromCrystalInput()


    os.sleep(1)
end