-- JC magical crops farming script for 7x7 areas

farmsize = 7
requiredFuel = 64 --how much fuel you need for a run 7x7+7x2 plus some extra
inverted = false --if you want to start on the right corner instead

fullyGrown = 7 --the meta data value when the plant is fully grown
cropType = "magicalcrops"
seedType = "MinicioSee"

function getFreeSlot()
	local cacheSlot = turtle.getSelectedSlot() --so we can jump back to it afterwards
	for i=1,16 do
		turtle.select(i)
		if turtle.getItemDetail() == nil then
			print("GetFreeSlot Returned " .. i)
			turtle.select(cacheSlot)
			return i
		end
	end
	turtle.select(cacheSlot)
	return false
end

function getSeeds()
	turtle.select(1)
	if turtle.getItemDetail() ~= nil then
		if string.find(turtle.getItemDetail().name, seedType) then
			return
		else
		local slo = getFreeSlot()
		turtle.select(1)
		print("moving " .. turtle.getSelectedSlot() .. "to:" .. slo)
		turtle.transferTo(tonumber(slo))
		end
	end

	for i=1,16 do
		turtle.select(i)
		if turtle.getItemDetail() ~= nil then
			print(turtle.getItemDetail().name)
			if string.find(turtle.getItemDetail().name, seedType) then
				turtle.transferTo(1)
				turtle.select(1)
				break
			end
		end
	end
	turtle.select(1)
end

function checkDig()
	found, data = turtle.inspectDown()
	if found then
		if string.find(data.name, cropType) then --if its the right kind of plant
			if data.metadata == fullyGrown then --if it's fully grown
				turtle.digDown() --dig it up
				getSeeds()
				turtle.placeDown()
			end
			--if its the right kind of crop but its not fully grown then dont do anything
		else
			--if its not the right kind of plant
			turtle.digDown()
			getSeeds()
			turtle.placeDown()
		end
	else
		--if there is nothing under us
		turtle.digDown()
		getSeeds()
		turtle.placeDown()
	end

end

function moveAndHarvest(num)
	for i=1,num do
		checkDig()
		turtle.forward()
		checkDig()
	end
end

function rightTurn()
	turtle.turnRight()
	turtle.forward()
	turtle.turnRight()
end

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

function run(lenght)
	local switch = true
	for i=1,lenght do
		moveAndHarvest(lenght-1)
		if i == lenght then break end --dont countinu after this point if its the last row

		if switch then
			if inverted then
				leftTurn()
			else
				rightTurn()
			end
			switch = false
		else
			if inverted then
				rightTurn()
			else
				leftTurn()
			end
			switch = true
		end

	end
	if switch then
		turtle.turnRight()
		turtle.turnRight()
		for i=1,lenght-1 do
			turtle.forward()
		end
	end
	if inverted then
		turtle.turnLeft()
	else
		turtle.turnRight()
	end


	for i=1,lenght-1 do
		turtle.forward()
	end

	if inverted then
		turtle.turnLeft()
	else
		turtle.turnRight()
	end
end

function dumpThings()
	for i=2,16 do
		turtle.select(i)
		turtle.dropDown()
	end

end

function reFuel()
	turtle.select(16)
	turtle.suckUp()
	turtle.refuel()
	turtle.select(1)
end

if turtle.getFuelLevel() < requiredFuel then
	print("trying to refuel")
	reFuel()
end


if turtle.getFuelLevel() > requiredFuel then
	print("Starting")
	while turtle.getFuelLevel() > requiredFuel do
		getSeeds()
		turtle.forward()
		run(farmsize)
		turtle.back()
		dumpThings()
		print("Current Fuel:" .. turtle.getFuelLevel())
		if turtle.getFuelLevel() < requiredFuel then
			print("Trying to refuel")
			reFuel()
		end
	end
	print("ran out of fuel")
else
	print("I dont have enough fuel")
	print("I need: " .. tostring(requiredFuel))
	print("I have: " .. tostring(turtle.getFuelLevel()))
end