tsukiMine_v0.4

-- Variable decleration.
local cycleCount
local inFront, blockInfo = turtle.inspect()

local blocksMoved = 0
local freeSlots
local selectedSlotItemInfo1
local isBlockInFront, blockInfoInFront = turtle.inspect()
local isBlockAbove, blockInfoAbove = turtle.inspectUp()
local isBlockBelow, blockInfoBelow = turtle.inspectDown()

-- Functions.
function digSuckMove(direction)
    if direction == "up" then
        if turtle.detectUp() == true then
            print("Block above! Mining, picking up and moving up!")
            turtle.digUp()
            turtle.suckUp()
            turtle.up()
        else
            print("Nothing above! Moving up!")
            turtle.up()
        end

    elseif direction == "down" then
        if turtle.detectDown() == true then
            print("Block below! Mining, picking up and moving down!")
            turtle.digDown()
            turtle.suckDown()
            turtle.Down()
        else
            print("Nothing below! Moving down!")
            turtle.Down()
        end

    elseif direction == "forward" then
        if turtle.detect() == true then
            print("Block in front! Mining, picking up and moving forward!")
            turtle.dig()
            turtle.suck()
            turtle.forward()
        else
            print("Nothing in front! Moving forward!")
            turtle.forward()
        end
    else
        print("Invalid argument!")
    end
end

function returnToStart(wasHalted)
 local x

 turtle.turnLeft()
 turtle.turnLeft()

 if wasHalted == true then
   x = blocksMoved
 else
   x = cycleCount
 end

 for i3 = 1, x, 1 do
  while turtle.detect() do
    print("Can't move back!")
    os.sleep(1)
  end
  turtle.forward()
  print("Still need to move back "..cycleCount-i3.." times.")
    end

 print("Dumping items!")

 for i3 = 1, 16, 1 do
  turtle.select(i3)
  turtle.drop()
 end

 turtle.turnLeft()
 turtle.turnLeft()
end

function isSpaceForItem(directionOfMining)
    -- Is there a free slot available?
    freeSlots = 0
    for i = 1, 16, 1 do
        if turtle.getItemCount(i) == 0 then
            freeSlots = freeSlots + 1
        end
    end
    if freeSlots == 9 or freeSlots > 9 then
        return true
    end

    -- Is there space for the same item then?
    if directionOfMining == "forward" then
        for i = 1, 16, 1 do
            selectedSlotItemInfo1 = turtle.getItemDetail(i)
            if blockInfoInFront.name ==  selectedSlotItemInfo1.name and turtle.getItemCount(i) < 55 then
                return true
            end
        end
    elseif
        directionOfMining == "up" then
        for i = 1, 16, 1 do
            selectedSlotItemInfo1 = turtle.getItemDetail(i)
            if blockInfoAbove.name ==  selectedSlotItemInfo1.name and turtle.getItemCount(i) < 55 then
                return true
            end
        end
    elseif
        directionOfMining == "down" then
        for i = 1, 16, 1 do
            selectedSlotItemInfo1 = turtle.getItemDetail(i)
            if blockInfoBelow.name ==  selectedSlotItemInfo1.name and turtle.getItemCount(i) < 55 then
                return true
            end
        end
    else
        -- No space available!
        return false
    end
end

-- Main Program.

-- Read the cycle count.
print("How many cycles to run?")
cycleCount = read()

-- Check if there is space for a maximum yeild of the cycle.
if isSpaceForItem() == true then

-- Run the cycle.
for i = 1, cycleCount, 1 do

  -- Print the current cycle number.
  print("Running cycle number "..i..".")

  digSuckMove("forward")
  blocksMoved = blocksMoved + 1
  digSuckMove("up")
  digSuckMove("up")
  turtle.turnLeft()

  for i2 = 1, 2, 1 do
    turtle.dig()
    turtle.down()
  end
  turtle.dig()

  turtle.turnRight()
  turtle.turnRight()

  for i2 = 1, 2, 1 do
    turtle.dig()
    turtle.up()
  end
  turtle.dig();

  turtle.turnLeft()
  turtle.down()
  turtle.down()

-- End of for.
end

print("Run completed successfuly! Returning to base!")
returnToStart(false)

print("Returned to starting position! Press any button to clear screen!")
os.pullEvent('key')
term.clear()
term.setCursorPos(1,1)
else
  print("Not enough free space for a max cycle yield! Returning to base!")
  returnToStart(true)

  print("Returned to starting position! Press any button to clear screen!")
  os.pullEvent('key')
  term.clear()
  term.setCursorPos(1,1)
end
-- Prevent instant termination.
-- read()