-- compact3x3
-- by Konitor 2019-09-10
-- minecraft computercraft turtle program

-- compacting nuggets to ingots, ingots to blocks, gobber globettes to globs
--
-- pastebin get VYDsTmsL compact3x3

-- setup: front chest = input
--        down chest = output and dropoff chest for cleanup
--
--        Example environment for "Gobber globettes to globs":
--        The mod "Simple Storage Network" does export globettes to 
--        the front chest and import everything from the down chest. 
--        When there are globettes in the down chest they get
--        exported again to the front chest. So no problem to clean the
--        crafting area to the down chest on startup after an error
--        has occured.
--
--        sustaining: can get stopped anytime and will startup safely
--        after world reload, chunk reload, game crash etc.
--        will sit and do nothing on error condition but tell you.
--        Only error atm: I'm not a crafty turtle! That's a show stopper.

-- Program overview:

-- First check if the turtle is a crafty turtle.
-- Then check for a label and label it when it has none.
-- Then copy this program to "startup" for self sustain.
-- Then start by cleaning up the internal buffer to the down chest.

-- Main loop:
-- Get 9 same items from front chest
-- Craft
-- Drop to down chest
-- Wait a little
-- Do it again.

-- crafted how many items so far?
crafted = 0

-- Check to see if I'm alright and ready for crafting

bCrafting = (peripheral.getType("left") == "workbench") or (peripheral.getType("right") == "workbench")
if not bCrafting then
  error("I want to be a crafty turtle! Craft me together with a crafting table.")
end

--Auto Label

if os.getComputerLabel() == nil then
  os.setComputerLabel("Compact3x3")
end

-- copy this program to startup when its not "startup"

me = fs.getName( shell.getRunningProgram() )

if( me ~=  "startup") then
	print( "Overwriting startup with "..me )
    if( fs.exists("startup") ) then
        fs.delete("startup")
    end
    fs.copy( me, "startup" )
end

print( "Front chest = input" )
print( "Down chest = output" )

sleep( 3 ) -- looking blankly at info, yeah!

-- cleaning up the crafting buffer after restart
-- clear inventory to dropoff chest

for i = 1, 16 do
	turtle.select(i)
	turtle.dropDown()
end


-- Main loop

while true do

	-- fill up the crafting area
	-- this can take more than one loop
	-- break when docraft == false and
	-- wait 3 secs for another attempt
	-- to complete the rest of the 3x3 area
	
	-- craft only when docraft still true

	docraft = true
	
	-- 1st row of 3x3 grid

	if( turtle.getItemCount(1) == 0 ) then
	  turtle.select(1)
	  if not turtle.suck(1) then docraft = false end
	end	

	if( turtle.getItemCount(2) == 0 ) then
	  turtle.select(2)
	  if not turtle.suck(1) then docraft = false end
	end	

	if( turtle.getItemCount(3) == 0 ) then
	  turtle.select(3)
	  if not turtle.suck(1) then docraft = false end
	end	
	
	-- 2nd row of 3x3 grid
	
	if( turtle.getItemCount(5) == 0 ) then
	  turtle.select(5)
	  if not turtle.suck(1) then docraft = false end
	end	

	if( turtle.getItemCount(6) == 0 ) then
	  turtle.select(6)
	  if not turtle.suck(1) then docraft = false end
	end	

	if( turtle.getItemCount(7) == 0 ) then
	  turtle.select(7)
	  if not turtle.suck(1) then docraft = false end
	end	
	
	-- 3th row of 3x3 grid
	
	if( turtle.getItemCount(9) == 0 ) then
	  turtle.select(9)
	  if not turtle.suck(1) then docraft = false end
	end	

	if( turtle.getItemCount(10) == 0 ) then
	  turtle.select(10)
	  if not turtle.suck(1) then docraft = false end
	end	

	if( turtle.getItemCount(11) == 0 ) then
	  turtle.select(11)
	  if not turtle.suck(1) then docraft = false end
	end	

	if docraft == true then
	
		-- just enough items
	
		if turtle.craft() then

			turtle.dropDown()
			crafted = crafted + 1
			print( "crafted "..crafted.." items" )
			
			-- give the system a break, don't harm fps
			
			sleep( 1 ) 
			
		else

			print ("Crafting failed after crafting "..crafted.." items.")
			
			-- cleaning up the crafting buffer after error
			-- clear inventory to dropoff chest

			for i = 1, 16 do
				turtle.select(i)
				turtle.dropDown()
			end
			
			sleep( 3 )
			
		end
		
	else
	
		-- not enough items
		-- wait for items, don't insist too much, don't harm fps
		
		sleep( 3 )
		
	end

	
end