d

-- PRESETS --

local userFuelLimit = 1 --Minimum fuel before turtle will start felling


-- SLOT SETTINGS --

local fuelSlot = 1
local woodSlot = 2
local saplingSlot = 3
local dirtSlot = 4


-- STATE VALUES --

state_nothing = 0
state_refueling = 1
state_notEnoughFuel = 2
state_searching = 3
state_chopping = 4



-- STATE VARIABLES --

local currentState = 0
local canPlant = 1
local foundTree = 0
local shutDown = 0              -- activate to break out of mainloop and end program

-- == FUNCTION PROTOTYPES == --


local obstacle = 0

function newPass()
  turtle.turnRight()
  if not turtle.detect() then
    turtle.forward()
    turtle.turnRight()
  else
    for i=1,2 do turtle.turnRight() end
    for i=1,2 do trutle.moveForward() end
  end
  return 0
end

--== FIND TREE == --
function findTree()

    while(foundTree==0) do
        turtle.select(woodSlot)
  print("checking if tree")
        if turtle.compare() then
            foundTree = 1
            print("Found one!")
            print("Running FellTree")
            return state_chopping
        else
            while(obstacle == 0) do
                if not turtle.detect() then
                turtle.forward()
            --      plantSapling()   --TEMP ADD, MIGHT NOT WORK?
                elseif not turtle.compare() then
                    print("Obstacle Found")
                    obstacle = 1
                    obstacle = newPass()
                else
                    break
                end
            end
        end
    end
end


--FUEL CHECK -- STATE 0 --
function checkFuel()
  if(turtle.getFuelLevel()<userFuelLimit)then
    print("Current Fuel Level: "..turtle.getFuelLevel())
    return state_refueling
  else
    print("Loaded with Fuel, begin search")
  return state_searching
  end
end

-- GET FUEL --
function getFuel()
 for i = 1,16 do
        print("checked slot: "..i)
        turtle.select(i)
        turtle.refuel()
        if(turtle.getFuelLevel() > userFuelLimit)then
            print("Fuel at limit, ready to start")
            return state_searching
        end
    end
    print("Not enough fuel in inventory")
    return state_notEnoughFuel
end

-- CHOP TREE --

function chopTree()
--  print("here")               -- DEBUG FOR FUNCTION TEST --
-- turtle.select(1)             -- +++++
-- turtle.refuel()              -- +++++

    local height = 0                --current height above ground
    turtle.select(woodSlot)         --selected slot for wood (see variables @ top)

    while true do
        if(turtle.compare())then        --Check for wood ahead, dig wood if true
            turtle.dig()
            print("Getting Wood")
        else                                        --Otherwise drop back to ground, enter search state
            print("no Wood, return to search")
            for i = 0,height do
                turtle.down()
    print(height)
                print("Moving Down")

            end
            return state_searching
        end

        if(not turtle.detectUp())then               --If nothing above, move up, inc height
            turtle.up()
            height = height + 1
            print("Free path above, moving up")
        else                                        --Remove obstruction above, move up, inc height
            turtle.digUp()
            turtle.up()
            height = height + 1
            print("Obstructed path above, digging and moving up")
        end
    end
end

-- PLANT SAPPLING --
-- To use, set the canPlant = plantSapling()

function plantSapling()

    local dirtBelow = 1
    turtle.select(dirtSlot)                     --selects dirt slot

    if(not turtle.compareDown())then            --if the block below isn't dirt
        print("No dirt below..")
        if(turtle.getItemCount(dirtSlot) > 1) then      --checks if it has at least 2 dirt blocks, digs and replaces the the block
            print("replacing with dirt")
            turtle.digDown()
            turtle.placeDown()
            dirtBelow = 1
        else
            print("Out of replacement dirt")
            dirtBelow = 0
        end
    end

    turtle.select(saplingSlot)

    if(canPlant and dirtBelow)  then
        print("attempting plant")
        if(turtle.getItemCount(saplingSlot) > 1) then   --turtle has sapling, plants
            print("planting")

            if(turtle.detectUp()) then turtle.digUp() end
            turtle.up()
            turtle.placeDown()
            if(turtle.detect()) then turtle.dig() end
            turtle.forward()
            turtle.down()
        else
            print("Out of saplings")
            return 0
        end
    end
    return 1
end

--TURN--
function aroundRight()
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    turtle.forward()
end

function aroundLeft()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
    turtle.forward()
end



-- ==MAIN LOOP== --

currentState = findTree()
print(currentState)

if currentState == state_chopping then
  currentState = chopTree()
else
  print("Check didn't work")
 end