--[[

FarmerBot v1.0.0

Guide
-----------------
Crops: Wheat
-----------------

Goals:
Farm down a line of crops and constantly check the crops.

2.0 Goals:
- Allow multiple bots at the same time (designating their name in logs)
- Attempt to till the ground below it (excluding water)
- Add more crops
]]--

-- Globals --
local crops = {
	{ id = 1, mature = 7, name = "minecraft:carrots", seed = "minecraft:carrot", label = "Carrots" },
	{ id = 2, mature = 7, name = "minecraft:wheat", seed = "minecraft:wheat_seeds", label = "Wheat" },
	{ id = 3, mature = 7, name = "minecraft:potatoes", seed = "minecraft:potato", label = "Potatoes" },
	{ id = 4, mature = 7, name = "magicalcrops:MinicioCrop", seed = "magicalcrops:MinicioSeeds", label = "Minicio" },
	{ id = 5, mature = 7, name = "magicalcrops:FireCrop", seed = "magicalcrops:FireSeeds", label = "Fire" }
}

-- Helper Function: Determine if the crop is fully developed. If not, alert the user.
function isGrown(row, length, current, expected)
	rednet.send(12, "[FarmBot] Crop (" .. row .. "," .. length .. ") status: " .. tonumber(string.format("%.3f", (current/expected) * 100)) .. "%", "bttp")
	if current == expected then
		return true
	end
	return false
end

-- Helper Function: Determines if the crop ID has any seeds for said crop. Selects seed if true.
function hasSeeds(id)
	for k,v in pairs(crops) do
		if v.id == id then
			for i = 1, 16 do
				local data = turtle.getItemDetail(i)
				if data.name == v.seed then
					turtle.select(i)
					return true
				end
			end
		end
	end
	return false
end

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

-- 2.0 Function: Attempt to fix an un-tilled grass block and place a seed.
function fixBlock()
	turtle.digDown()
	if hasSeeds(input.crop) then
		turtle.placeDown()
	end
end

-- Network Handling (modem on right)
if rednet.isOpen("right") then
	rednet.send(12, "[FarmBot] Connected to modem!", "bttp")
else
	rednet.open("right")
	rednet.send(12, "[FarmBot] Turning on modem...", "bttp")
	rednet.send(12, "[FarmBot] Connected successfully!", "bttp")
end


-- Player Input
local input = { rows = 0, length = 0, crop = 0 }

-- Ask player for input
term.write("Please enter number of rows: ")
input.rows = tonumber(read())
term.write("Please enter in length of row: ")
input.length = tonumber(read())
--Display all of the crops.
for k,v in pairs(crops) do
	print("#" .. tostring(v.id) .. " - " .. v.label)
end
term.write("Please enter in the crop ID to replace: ")
input.crop = tonumber(read())

rednet.send(12, "[FarmBot] Farming " .. input.rows .. "x" .. input.length .. " sized farm.", "bttp")

-- Preface: Determine if the bot was placed on the ground. If so, go up one block.
if turtle.detectDown() then
	turtle.up()
	turtle.forward()
end

while true do

	-- Start farming the area.
	for i = 1, input.rows do

		for j = 1, input.length do
			-- Check status of current crop.
			if turtle.detectDown() then
				--There is something below. Determine if it is something we can handle.
				local success, data = turtle.inspectDown()
				if success then
					for k,v in pairs(crops) do
						if data.name == v.name then
							if isGrown(i,j,data.metadata,v.mature) then
								--Break the block... Then replace...
								turtle.digDown()
								turtle.suckDown() -- Pick up the local crop.
								if hasSeeds(v.id) then
									turtle.placeDown()
								else
									rednet.send(12, "[FarmBot] Unable to find seed for " .. v.label .. " (" .. i .. "," .. j .. ")", "bttp")
								end
							end
						end
					end
				else
					rednet.send(12, "[FarmBot] Cannot read block (" .. i .. "," .. j .. ")", "bttp")
				end
			else
				rednet.send(12, "[FarmBot] Seeding block (" .. i .. "," .. j .. ")", "bttp")
				fixBlock()
			end

			-- Go forward one to continue.
			if j < input.length then
				turtle.forward()
			end
		end
		os.sleep(3)
		-- Done reviewing the row. Now move to new row.
		local isEven = i % 2 == 0
		if isEven == false then
			turtle.turnLeft()
			turtle.forward()
			turtle.turnLeft()
		else
			turtle.turnRight()
			turtle.forward()
			turtle.turnRight()
		end
	end
	rednet.send(12, "[FarmBot] Resetting back to start.", "bttp")
	os.sleep(5)

	-- Go back to start where chest is.
	for k = 1, input.length do
		turtle.forward()
	end
	turtle.turnLeft()
	for l = 1, input.rows do
		turtle.forward()
	end
	turtle.turnLeft()

	-- Drop items in hopper below.
	turtle.down()
	os.sleep(2)
	dropItems()
	os.sleep(2)
	turtle.up()

	turtle.forward()
end