Resin Bot v1 Beta

--Sap farming turtle.

local rows = 1
local compass = 0
local x = 0
local y = 0
local z = 0

function spin()
  print "spinning"
  turtle.turnRight()
  turtle.turnRight()
  compass = (compass + 2) % 4
end

function forward()
  print "going forward"
  if turtle.detect() then
    return false
  end
  while not turtle.forward() do:
    sleep(1)
  end
  if compass == 0 then
    x = x + 1
  elseif compass == 1 then
    y = y + 1
  elseif compass == 2 then
    x = x - 1
  elseif compass == 3 then
    y = y - 1
  else
    print "what are you doing!?! Not a valid compass value."
  end
  return true
end

function up()
  --print "going up"
  if turtle.up() then
    z = z + 1
    return true
  else
    return false
  end
end

function down()
  --print "going down"
  if turtle.down() then
    z = z - 1
    return true
  else
    return false
  end
end

function turnRight()
  --print "turning right"
  if turtle.turnRight() then
    compass = (compass + 1) % 4
    return true
  else
    return false
  end
end

function turnLeft()
  --print "turning left"
  if turtle.turnLeft() then
    compass = math.abs((compass - 1) % 4)
    return true
  else
    return false
  end
end

function emptyInv() -- may as well empty our inventory while we're here.


end

function recharge() --Find and use turtle recharging station.


end

function returnToBase()
  --This code will go up to a respectable Z, then go to 0 x and 0 y, then drop down to 0 z. This is the starting point, and should be where we keep the recharging station and ender chest.
  for i = 0, 20 do
    up()
  end
  print (x, "x")
  print (y, "y")
  print (z, "z")
  repeat
    turnRight()
  until compass == 2
  while x ~= 0 do
    forward()
  end
  turnRight()
  while y ~= 0 do
    forward()
  end
  turnRight()
  while z ~= 0 do
    down()
  end
  emptyInv()
  recharge()
end

function rotateCounterClockwise()
  --print "rotating counter clockwise"
  turnRight()
  forward()
  turnLeft()
  forward()
  turnLeft()
end
function rotateClockwise()
  --print "rotating clockwise"
  turnLeft()
  forward()
  turnRight()
  forward()
  turnRight()
end

function harvestFrontBack()
  repeat
    turtle.dig()
    if not up() then
      turtle.digUp()
      up()
    end
  until not turtle.detect()
  forward()
  forward()
  spin()
  while z > 0 do
    if not down() then
      print "breaking to go down"
      turtle.digDown()
      down()
    end
    turtle.dig()
  end
end

function harvestTree() --Starting with turtle facinga a tree, it gets all the resin from each side of the tree and returns to its start position.
  print "Starting"
  harvestFrontBack()
  rotateCounterClockwise()
  harvestFrontBack()
  rotateClockwise()
end

function turn(var)
  print ("var",var)
  if var % 2 == 1 then
    turnLeft()
  elseif var % 2 == 0 then
    turnRight()
  end
end

function nextRow()
  local dir = 3
  print ("dir ",dir)
  if rows % 2 == 0 then
    dir = 2
    turn(dir)
  else
    dir = 3
    turn(dir)
  end
  print ("dir ",dir)
  forward()
  forward()
  local rowFound = false
  print ("dir ",dir)
  while not rowFound do
    print ("dir ",dir)
    if not turtle.forward() then
      returnToBase()
      sleep(3600)
    end
    print ("dir",dir)
    turn(dir)
    if turtle.detect() then
      break
    end
    turn(dir - 1)
  end
  rows = rows + 1
  rotateCounterClockwise()
end

function nextTree()
  local detectTree = false
  repeat
    turtle.turnRight()
    if not turtle.forward() then
      nextRow()
      break
    end
    turnLeft()
  until turtle.detect()
end



function main()
  while true do
    harvestTree()
    nextTree()
  end
end
main()