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--{program="aTreeFarm",version="1.01",date="2015-01-31"}
---------------------------------------
-- aTreeFarm           by Kaikaku
-- 2015-01-31, v1.01   fixed initial refuelling
-- 2015-01-31, v1.00   finalized UI + counter
-- 2015-01-30, v0.80   auto set-up option
-- 2015-01-26, v0.70   preparing for video
-- 2014-01-12, v0.61   replant limited tries
-- 2014-01-04, v0.60   redstone stop
-- 2013-12-15, v0.51   initial
---------------------------------------


---------------------------------------
---- DESCRIPTION ---------------------- 
---------------------------------------
-- Turtle-automated tree farm.
-- Details see information during program
--   execution or YouTube video.


---------------------------------------
---- PARAMETERS ----------------------- 
---------------------------------------
local cVersion  ="1.01"
local cPrgName  ="aTreeFarm"
local cMinFuel  = 960*2      -- 2 stacks of planks

local minRandomCheckSapling=0.1 -- below this will check replant
local actRandomCheckSapling=minRandomCheckSapling*2
local cIncreaseCheckSapling_Sapling=0.02
local cIncreaseCheckSapling_Stub=0.04
local cMaxCheckSapling=0.6
local strC="tReeTreESdig!diG;-)FaRmKaIKAKUudIgYdIgyTreEAndsOrRygUYsd"

local cSlotChest=16           -- chest for crafty turtle
local cCraftRefuelMaxItems=16 -- use how many logs to refuel at max
local cSlotRefuel=15          -- where to put fuel
local cExtraDigUp=1           -- go how many extra levels to reach jungle branches
local cLoopEnd=56             -- one loop
local cWaitingTime=20         -- if redstone signal in back is on

---------------------------------------
---- VARIABLES ------------------------ 
---------------------------------------
--local testStart=nil
--local testEnd=nil
local strC_now="" 
local strC_next=""

local tmpResult=""
local blnAskForParameters=true
local blnShowUsage=false
local blnAutoSetup=false
local strSimpleCheck="Press enter to start:"
local intCounter=0
local maxCounter=0

---------------------------------------
---- tArgs ----------------------------
---------------------------------------
local tArgs = {...}
if #tArgs >= 1 then -- no error check
  blnAskForParameters=false
  if tArgs[1]=="help" then blnShowUsage=true end
  if tArgs[1]=="setup" then blnAutoSetup=true end
  if tArgs[1]=="set-up" then blnAutoSetup=true end
  if tonumber(tArgs[1])~=nil then
    maxCounter=tonumber(tArgs[1])
  end
  --print("maxCounter='",maxCounter,"'") os.sleep(5)
end
--if #tArgs >= 2 then
--  testStart = tArgs[2]
--end
--if #tArgs >= 3 then
--  testEnd = tArgs[3]
--end

if blnShowUsage then
  print("Usage: aTreeFarm [setup/set-up]")
  print("   or: aTreeFarm [maxCounter]")
  print("setup or set-up:")
  print("   Will start auto set-up")
  print("maxCounter:")
  print("   0=will farm infinitely")
  print("   x=will farm x rounds")
  print("More details on YouTube ;)")
  return  
end

---------------------------------------
-- BASIC FUNCTIONS FOR TURTLE CONTROL -
---------------------------------------
local function gf(n)
  if n==nil then n=1 end
  for i=1,n,1 do while not turtle.forward() do end end
end
local function gb(n)
  if n==nil then n=1 end
  for i=1,n,1 do while not turtle.back() do end end
end
local function gu(n)
  if n==nil then n=1 end
  for i=1,n,1 do while not turtle.up() do end end
end
local function gd(n)
  if n==nil then n=1 end
  for i=1,n,1 do while not turtle.down() do end end
end
local function gl(n)
  if n==nil then n=1 end
  for i=1,n,1 do while not turtle.turnLeft() do end end
end
local function gr(n)
  if n==nil then n=1 end
  for i=1,n,1 do while not turtle.turnRight() do end end
end
local function pf(n)
  -- moves backwards if n>1
  if n==nil then n=1 end
  for i=1,n,1 do if i~=1 then gb() end turtle.place() end
end
local function pu()  turtle.placeUp()    end
local function pd()  turtle.placeDown()  end
local function df()  return turtle.dig() end
local function du()  turtle.digUp()      end
local function dd()  turtle.digDown()    end
local function sf()  turtle.suck()       end
local function su()  turtle.suckUp()     end
local function sd(n)
  if n==nil then 
    while turtle.suckDown() do end
  else
    for i=1,n do
	  turtle.suckDown()
	end
  end 
end
local function Df()  turtle.drop()      end
local function Du()  turtle.dropUp()    end
local function Dd(n) 
  if n==nil then n=64 end 
  turtle.dropDown(n)
end
local function ss(s) turtle.select(s)   end

local function askForInputText(textt)
  local at=""
  -- check prompting texts
  if textt==nil then textt="Enter text:" end
  
  -- ask for input
  write(textt)
  at=read() 
  return at
end

local function checkFuel()
  local tmp=turtle.getFuelLevel()
  return tmp
end



---------------------------------------
---- functions ------------------------
---------------------------------------

local function cutTree()
local tmpExtraDigUp=cExtraDigUp

  ---- assumptions
  -- turtle faces trunk one block below bottom
  ---- variables
  local intUpCount = 0
  local intFace = 0 -- -1=left, 1=right
  local blnDigSomething=false
  
  term.write("  cutting tree: ")
  
  -- get into tree column
  df()
  while not turtle.forward() do df() end
  gr() df() gl() df() gl() df()
  local intFace=-1 

  -- cut and go up
  repeat
    blnDigSomething=false
    du()
    while not turtle.up() do du() end
    blnDigSomething=df() or blnDigSomething
    if intFace==-1 then 
      gr()
      blnDigSomething=df() or blnDigSomething
      gr()
    elseif intFace==1 then
      gl()
      blnDigSomething=df() or blnDigSomething
      gl()
    end
    intFace=intFace * -1
    blnDigSomething=df() or blnDigSomething
    intUpCount = intUpCount +1
    term.write(".")
	
	-- check for 2 conditions
	-- either
	-- 1) nothing above the turtle
	-- or
	-- 2) nothing dig on the other columns blnDigSomething
	if not (turtle.detectUp() or blnDigSomething) then 
	  tmpExtraDigUp=tmpExtraDigUp-1  
    else
      tmpExtraDigUp=cExtraDigUp -- restore it	
	end		
  until tmpExtraDigUp<0 --not (turtle.detectUp() or blnDigSomething) ----- NOT kai_2 
  
  -- go off tree column  
  if intFace==-1 then 
    gl()
  elseif intFace==1 then
    gr()
  end
  df()
  while not turtle.forward() do df() end
  gl()
  intFace = 0 

  intFace = 1 -- 1=forward,-1=backwards
  -- go back down  
  -- hint: only digging front and back in order
  --       to not cut into larger neighbouring,
  --       as this may leave upper tree parts left
  for i = 1,intUpCount+1 do
    dd() df() gl(2)	df()
	intFace=intFace* -1
    while not turtle.down() do dd() end
  end
  if intFace==1 then
    gl()
  elseif intFace==-1 then
    gr()
  end
  sf() df() term.write(".")
  print(" done!")

  -- plant new
  plantTree()
  while not turtle.up() do du() end
  sd()  
end

---------------------------------------
function plantTree()
local tmpCount=0
  ---- assumptions
  -- turtle faces place to plant

  -- check for enough saplings
  sf()
  if turtle.getItemCount(1) > 1 then
    -- plant
    print("  plant new sapling")
    while not turtle.place() do 
	  print("  hard to plant here...")
	  tmpCount=tmpCount+1
	  if tmpCount>3 then break end
	  os.sleep(1)
	end  -- NOT kai_2
  else
    -- error
    print("  Out of saplings...") -- prog name
    os.sleep(5)
	actRandomCheckSapling=cMaxCheckSapling
    return
  end
end

---------------------------------------
local function replantStub()
  ss(2) -- compare with wood in slot 2
  if turtle.compare() then
    -- assumption: there is only a stub left, so replant
	-- if there is a tree on top of it, it will be harvested next round
	print("  Replanting a stub")
	df() ss(1)
	if pf() then
	  actRandomCheckSapling=actRandomCheckSapling+cIncreaseCheckSapling_Stub
	else
	  print("    failure!")	  
	end
  else
    ss(1)
    end
  end
  local function eS(sI,sA,eA)
  local sO=""
  local sR=""
  if sA==nil then sA=1 end
  if eA==nil then eA=string.len(sI) end
  for i=sA,eA,1 do
	sO=string.sub(sI,i,i)
	if sR~="" then break end
    if sO=="a" then
      gl()
    elseif sO=="d" then
      gr()
	else
      while not turtle.forward() do df() end
    end
  end
  return sR
end

---------------------------------------
local function randomReplant()
local intSuccess=0
  if turtle.getItemCount(1) > 10 then
	-- try to plant
    while not turtle.down() do dd() end
	sf() gl() sf()
	if turtle.place() then 
	  actRandomCheckSapling=actRandomCheckSapling+cIncreaseCheckSapling_Sapling 
	else
	  if turtle.detect() then replantStub() end
	end
	gl() sf() gl() sf()
	if turtle.place() then 
	  actRandomCheckSapling=actRandomCheckSapling+cIncreaseCheckSapling_Sapling 
	else
	  if turtle.detect() then replantStub() end
	end	
	gl() sf()
    while not turtle.up() do du() end
	-- ensure min probability and max 100%
	actRandomCheckSapling=math.max(actRandomCheckSapling-0.01,minRandomCheckSapling)
	actRandomCheckSapling=math.min(actRandomCheckSapling,cMaxCheckSapling)
    print((actRandomCheckSapling*100).."% check probability")
  else
    -- extra suck
    while not turtle.down() do dd() end
	sf() gr() sf() gr() sf() gr() sf() gr()	sf()
	while not turtle.up() do du() end
	sd()
  end
end

---------------------------------------
---- main -----------------------------
---------------------------------------
-- step 0 info and inital check
term.clear() term.setCursorPos(1,1)
repeat
 print("+-------------------------------------+")
 print("| aTreeFarm ",cVersion,", by Kaikaku (1/2)   |")
 print("+-------------------------------------+")
 print("| Farm set-up: Place crafty felling   |")
 print("|   turtle down (e.g. bottom left     |")
 print("|   corner of chunk). Run program with|")
 print("|   parameter 'setup' (one time).     |")
 print("| Materials for auto set-up:          |")
 print("|   slot 3: chest   (1)               |")
 print("|   slot 4: cobble  (47)              |")
 print("|   slot 5: torches (8)               |")
 print("+-------------------------------------+")

if blnAutoSetup then
  if turtle.getItemCount(3)~=1 or turtle.getItemCount(4)<47 or turtle.getItemCount(5)<8 then
  -- inventory not ready for set-up
    strSimpleCheck="Fill in slots 3-5 and press enter:"
  else
    strSimpleCheck="Press enter to start:"
  end
else  
  strSimpleCheck="Press enter to start:"
end
if not blnAskForParameters and strSimpleCheck=="Press enter to start:" then break end
until askForInputText(strSimpleCheck)=="" and strSimpleCheck=="Press enter to start:"



term.clear() term.setCursorPos(1,1)
repeat
 print("+-------------------------------------+")
 print("| aTreeFarm ",cVersion,", by Kaikaku (2/2)   |")
 print("+-------------------------------------+")
 print("| Running the farm:                   |")
 print("|   Felling turtle sits above chest   |")
 print("|   (as after running set-up). Turtle |")
 print("|   needs some initial fuel to start. |")
 print("| Turtle inventory:                   |")
 print("|   slot  1: saplings          (20+x) |")
 print("|   slot  2: wood from sapling (1)    |")
 print("|   slot 16: chest             (1)    |")
 print("+-------------------------------------+")

if turtle.getItemCount(1)<11 or turtle.getItemCount(2)~=1 or turtle.getItemCount(16)~=1 then
  -- inventory not ready
  strSimpleCheck="Provide materials and press enter:"
else  
  strSimpleCheck="Press enter to start:"
end
--strSimpleCheck="Press enter to start:"
if not blnAskForParameters and strSimpleCheck=="Press enter to start:" then break end
if blnAutoSetup then strSimpleCheck="Press enter to start:" end
until askForInputText(strSimpleCheck)=="" and strSimpleCheck=="Press enter to start:"


---------------------------------------
---- set-up farm ----------------------
---------------------------------------
-- set-up = not running the farm
if blnAutoSetup then
  write("Setting up tree farm...")
  -- chest
  gf(3) gr() gf(3) gl() ss(3) dd() pd() 
  -- path
  ss(4)
  for i=1,9,1 do gf() dd() pd() end gr()
  for i=1,3,1 do gf() dd() pd() end gr()
  for i=1,6,1 do gf() dd() pd() end gl()
  for i=1,3,1 do gf() dd() pd() end gl()
  for i=1,6,1 do gf() dd() pd() end gr()
  for i=1,3,1 do gf() dd() pd() end gr()
  for i=1,9,1 do gf() dd() pd() end gr()
  for i=1,8,1 do gf() dd() pd() end
  -- torches
  ss(5) gf(2) gl() pf() gu() gb(10) pd()
  gl() gf(5) pd() gf() pd() gf(5) pd() gr() gf(11) pd()
  gb(3) gr() gf(3) pd() gf(5) pd() gf(2) gr() gb(2) gd()
  print(" done!")
  print("You can now run the tree farm with: ",cPrgName)
  return
end


---------------------------------------
---- tree farm ------------------------
---------------------------------------
strC_next=string.sub(strC,1,1)
  
while true do  
  
  -- step 0 check exit 
  if maxCounter>0 then
    if intCounter==maxCounter then
	  print("Completed all ",maxCounter,"  farming rounds.")
	  print("I'm awaiting new commands, master!")
	  return
	end
  end
  
  -- step 2 wait if redstone signal
  while rs.getInput("back") do
    print("Waiting due to redstone signal ",cWaitingTime,"s.")
    os.sleep(cWaitingTime)
  end

  -- step 3 new round  
  while not turtle.up() do du() end
  ss(1)
  intCounter=intCounter+1
  print("Starting round ",intCounter," with "..turtle.getItemCount(1).." saplings.")

  for i=1,cLoopEnd,1 do
  
    -- update commands
	strC_now=strC_next
	if i<cLoopEnd then
      strC_next=string.sub(strC,i+1,i+1)
    else
	  strC_next=string.sub(strC,1,1)
	end
	
    -- step 4 one step on the road
    tmpResult=eS(strC,i,i)
	if tmpResult~="" then
	  print("found special command: "..tmpResult)
	end
    
	-- step 5 check for blocks
	-- step 5.1 check left hand side
	if strC_now~="a" and strC_next~="a" then
	  -- now  a=>just turned left
	  -- next a=>will turned left
	  gl()
	  if turtle.detect() then cutTree() end
	  gr()
	end
	-- step 5.2 check right hand side
	if strC_now~="d" and strC_next~="d" then	
	  -- now  d=>just turned right
	  -- next d=>will turn right
	  gr()
	  if turtle.detect() then cutTree() end
	  gl()
	end
	sd()  
	
	if math.random()<=actRandomCheckSapling then
	  if strC_now~="d" and strC_now~="a" then	
	    randomReplant()
	  end
	end
  end
  
  -- step 6 need to craft some fuel?
  craftFuel()
  
  -- step 7 empty into chest
  print("  Drop what I've harvested!")
  while not turtle.down() do dd() end
  ss(2)

  if turtle.compareTo(1) then
    print("Ups, in slot 2 is the same as in slot 1??")
    Dd()
  else
    -- if slot 2 has other item (wood) than slot 1
	--   keep one of them for comparison
    Dd(math.max(turtle.getItemCount(2)-1,0))
  end
  for i=3,15,1 do
    -- assumption slot 16 contains a chest
    ss(i) Dd()
  end
  os.sleep(0)
  ss(1)
  
end