log2

-- Log V2

local Sapling = 1
local Tree = 2
local Wall = 3
local Home = 4

local Height = 1

local RandMove = 4

function checkSpace()
  -- let's check if there's space for more wood
  local space = 0

  for i=5,16 do

    turtle.select(i)

    if turtle.compareTo(Tree) then

      if turtle.getItemSpace(i) >= 1 then

        space = space + turtle.getItemSpace(i)

      end

    elseif turtle.getItemSpace(i) == 64 then

        space = space + 64

    end

  end

  if space >= 15 then

    rednet.send(Console,"Space:"..space.." Felling now!")
    return true

  else

    rednet.send(Console,"Not enough space - not felling!")
    return false

  end

end

function plantTree()

  turtle.select(Sapling)

  if turtle.getItemCount(Sapling) >= 2 then

    turtle.place(1)
    rednet.send(Console, "Sapling placed, "..turtle.getItemCount(Sapling).." Saplings left")
    return true

  else

    if saplingRefill() and turtle.getItemCount(Sapling) >= 2 then
      turtle.place(1)
      rednet.send(Console, "Sapling placed, "..turtle.getItemCount(Sapling).." Saplings left")
      return true

    else

      return false

    end

  end

  if checkSpace() == false then

    goHome()

  end

end

function saplingRefill()

  for i = 5,16 do

    turtle.select(i)

    if turtle.compareTo(Sapling) then

      rednet.send(Console,"Found Saplings - refilling...")

      if turtle.transferTo(Sapling) then

        rednet.send(Console,"Refilled Saplings!")
        return true

      else

        rednet.send(Console,"Sapling Refill failed!")
        return false

      end

    end

  end

end

function farming()
  -- do whatever we need to plant or harvest a tree

  if turtle.detect() then

    turtle.select(Sapling)

    if turtle.compare() then

      return true;

    else

      logTree()

    end

  else

    freeSpaceAround = true;

    if turtle.forward() then

      turtle.suck()

      if turtle.detect() then

        freeSpaceAround = false

      else

        turtle.back()

        for i=1,4 do

          turtle.turnRight()
          turtle.suck()

          if turtle.detect() == true then

            logTree()
            freeSpaceAround = false

          end

        end

      end

    else

      freeSpaceAround = false

    end

    if freeSpaceAround == true then

      if not plantTree() then

        rednet.send(Console,"Planting failed!")

      end

    end

  end

end

function logTree()

  turtle.select(Tree)

  if turtle.compare() then

    if checkSpace() then

      turtle.dig()
      turtle.forward()

      while turtle.detectUp() do
        turtle.digUp()
        turtle.up()
        Height = Height + 1
        --print("Height: "..Height)
      end

      while Height > 1 do
        turtle.digDown()
        turtle.down()
        Height = Height - 1
      end

      turtle.suck()
      turtle.turnRight()
      turtle.suck()
      turtle.turnRight()
      turtle.suck()
      turtle.turnRight()
      turtle.suck()
      turtle.turnRight()
      turtle.suck()
      turtle.back()
      turtle.suck()
      turtle.select(Sapling)
      plantTree()

    else

      goHome()

    end

  end

end

function move()
  turn = math.random(2)

  if turn == 1 then
    turtle.turnLeft()
  else
    turtle.turnRight()
  end

  turtle.suck()

  rand = math.random(RandMove)

  for i=1,rand do
    turtle.forward()
    turtle.suck()
  end

end

function goHome()

rednet.send(Console,"Going home...")

-- find the next wall

  failcount = 0

  while not turtle.compare() do

    turtle.select(Wall)
    turtle.turnLeft()

    while not turtle.detect() do

        turtle.forward()

    end

    failcount = failcount + 1

    rednet.send(Console,"Failcount "..failcount)

    if failcount >= 5 then

      turtle.select(Sapling)

      if turtle.compare() then

        turtle.dig()
        failcount = 0
        turtle.forward()

      end

    end

  end

  rednet.send(Console,"Found wall - driving home along now...")

-- move along the wall to go home

  restart = false

  while not restart do

    while not turtle.detect() do

      turtle.forward()

    end

    turtle.select(Home)

    if turtle.compare() then

      -- we're at home - do some home stuff

      saplingRefill()

      turtle.select(Tree)
      TreeNum = turtle.getItemCount(Tree)
      turtle.dropDown(TreeNum-1)

      for i=5,16 do
        turtle.select(i)
        turtle.dropDown()
      end

      turtle.turnRight()
      turtle.turnRight()

      restart = true

      shell.run("reboot")

    else

      turtle.turnLeft()

    end

  end

  return true

end


-- The program starts here!

term.clear()
print("Logger V2 - by Helmi74")
print("----------------------")


rednet.open("right")

rednet.send(Console,"starting to work now...")

ready = true

for i=1,4 do
  turtle.select(i)
  if turtle.getItemCount(i) == 0 then
    print("not ready - please fill slots 1 to 4")
    print("--- --- --- --- ---")
    print("Put a stack of saplings in slot "..Sapling)
    print("Put one tree log of the same sort in slot "..Tree)
    print("Put one wall block in slot "..Wall)
    print("Put one home block in slot "..Home)

    rednet.send(Conosole,"Not ready -instructions printed to local console")
    ready = false
    break
  end
end

if ready == true then

  while true do

    move()
    farming()

  end

end