rednet.open("left")

local mainID = 15
local touchID = 16
local charcoal = false

local function turnAround()
	turtle.turnLeft()
	turtle.turnLeft()
end

local function goUp(count)
	for k = 1,count do
		turtle.up()
	end
end

local function goDown(count)
	for k = 1,count do
		turtle.down()
	end
end

while true do    --Main Loop
	while turtle.getItemCount() == 0 do    --Get items
		if not turtle.suck() then
			goDown(2)
			turtle.suckDown()
			goUp(2)
		end
		if turtle.getItemCount() == 0 then
			rednet.send(mainID, "home")
			sleep(.5)
			rednet.send(mainID, "2")
			sleep(60)
			rednet.send(mainID, "1")
			sleep(60)
		end
	end
	
	rednet.send(mainID, "0")
	sleep(.5)
	rednet.send(mainID, "away")
	
	if turtle.getItemCount() ~= 0 then
		local data = turtle.getItemDetail()
		if data.name == "minecraft:log" then		 --Sort logs
			--[[
			rednet.send(touchID, "charcoal")
			while true do
				id, message = rednet.receive()
				if id == touchID then
					charcoal = message
					break
				end
			end
			]]
			if charcoal then 
				turtle.turnLeft()
				if not turtle.drop() then
					goUp(4)
					turtle.turnLeft()
					turtle.drop()
					turtle.turnRight()
					goDown(4)
				end
				turtle.turnRight()
			else 
				goUp(4)
				turnAround()
				turtle.drop()
				turnAround()
				goDown(4)
			end
		elseif data.name == "minecraft:sapling" then --Sort saplings
			goUp(1)
			if not turtle.drop() then
				goUp(3)
				turnAround()
				turtle.drop()
				turnAround()
				goDown(3)
			end
			goDown(1)
		elseif data.name == "minecraft:apple" then   --Sort apples
			turnAround()
			goUp(1)
			turtle.drop()
			goDown(1)
			turnAround()
		elseif data.name == "minecraft:coal" then    --Sort Charcoal and refuel (if needed)
			if turtle.getFuelLevel() < (turtle.getFuelLimit() - 5120) then
				turtle.refuel()
			else
				goDown(2)
				turtle.turnLeft()
				if not turtle.drop() then
					goUp(6)
					turnRight()
					if not turtle.drop() then
						turnAround()
						turtle.drop()
						turnAround()
					end
					goDown(4)
				else
					goUp(2)
					turtle.turnRight()
				end
			end
		else						--Sort everything else
			goDown(1)
			turtle.turnRight()
			turtle.drop()
			turtle.turnLeft()
			goUp(1)
		end
	end
end

rednet.close("left")