toolranks = {}

toolranks.colors = {
	grey = minetest.get_color_escape_sequence("#9d9d9d"),
	green = minetest.get_color_escape_sequence("#1eff00"),
	gold = minetest.get_color_escape_sequence("#ffdf00"),
	white = minetest.get_color_escape_sequence("#ffffff")
}


function toolranks.create_description(name, uses, level)

	local newdesc = toolranks.colors.green .. name .. "\n" ..
		toolranks.colors.gold .. "Level " .. (level or 1) .. "\n" ..
		toolranks.colors.grey .. "Nodes dug: " .. (uses or 0)

	return newdesc
end


function toolranks.get_level(uses)

	if uses < 100 then
		return 1
	elseif uses < 200 then
		return 2
	elseif uses < 400 then
		return 3
	elseif uses < 800 then
		return 4
	elseif uses < 1600 then
		return 5
	else
		return 6
	end
end


function toolranks.new_afteruse(itemstack, user, node, digparams)

	local itemmeta  = itemstack:get_meta() -- Metadata
	local itemdef   = itemstack:get_definition() -- Item Definition
	local itemdesc  = itemdef.original_description -- Original Description
	local dugnodes  = tonumber(itemmeta:get_string("dug")) or 0 -- Number of nodes dug
	local lastlevel = tonumber(itemmeta:get_string("lastlevel")) or 1 -- Level the tool had on last dig

	-- Only count nodes that spend the tool
	if digparams.wear > 0 then
		dugnodes = dugnodes + 1
	end

	-- Warn player when tool is almost broken
	if itemstack:get_wear() > 60135 then

		minetest.chat_send_player(user:get_player_name(),
			toolranks.colors.gold.."Your tool is about to break!")

		minetest.sound_play("default_tool_breaks", {
			to_player = user:get_player_name(),
			gain = 2.0,
		})
	end

	level = toolranks.get_level(dugnodes)

	-- Alert player when tool has leveled up
	if lastlevel < level then

		minetest.chat_send_player(user:get_player_name(), "Your "
			.. toolranks.colors.green .. itemdesc
			.. toolranks.colors.white .. " just leveled up!")

		minetest.sound_play("toolranks_levelup", {
			to_player = user:get_player_name(),
			gain = 1.0,
		})
	end

	local newdesc   = toolranks.create_description(itemdesc, dugnodes, level)

	-- Set new meta
	itemmeta:set_string("lastlevel", level)
	itemmeta:set_string("dug", dugnodes)
	itemmeta:set_string("description", newdesc)

	local wear = digparams.wear

	-- Set wear level
	if level > 1 then
		wear = digparams.wear / (1 + level / 4)
	end

	itemstack:add_wear(wear)

	return itemstack
end


minetest.override_item("default:pick_diamond", {
	original_description = "Diamond Pickaxe",
	description = toolranks.create_description("Diamond Pickaxe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:axe_diamond", {
	original_description = "Diamond Axe",
	description = toolranks.create_description("Diamond Axe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:shovel_diamond", {
	original_description = "Diamond Shovel",
	description = toolranks.create_description("Diamond Shovel"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:pick_wood", {
	original_description = "Wooden Pickaxe",
	description = toolranks.create_description("Wooden Pickaxe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:axe_wood", {
	original_description = "Wooden Axe",
	description = toolranks.create_description("Wooden Axe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:shovel_wood", {
	original_description = "Wooden Shovel",
	description = toolranks.create_description("Wooden Shovel"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:pick_steel", {
	original_description = "Steel Pickaxe",
	description = toolranks.create_description("Steel Pickaxe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:axe_steel", {
	original_description = "Steel Axe",
	description = toolranks.create_description("Steel Axe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:shovel_steel", {
	original_description = "Steel Shovel",
	description = toolranks.create_description("Steel Shovel"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:pick_stone", {
	original_description = "Stone Pickaxe",
	description = toolranks.create_description("Stone Pickaxe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:axe_stone", {
	original_description = "Stone Axe",
	description = toolranks.create_description("Stone Axe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:shovel_stone", {
	original_description = "Stone Shovel",
	description = toolranks.create_description("Stone Shovel"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:pick_bronze", {
	original_description = "Bronze Pickaxe",
	description = toolranks.create_description("Bronze Pickaxe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:axe_bronze", {
	original_description = "Bronze Axe",
	description = toolranks.create_description("Bronze Axe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:shovel_bronze", {
	original_description = "Bronze Shovel",
	description = toolranks.create_description("Bronze Shovel"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:pick_mese", {
	original_description = "Mese Pickaxe",
	description = toolranks.create_description("Mese Pickaxe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:axe_mese", {
	original_description = "Mese Axe",
	description = toolranks.create_description("Mese Axe"),
	after_use = toolranks.new_afteruse})

minetest.override_item("default:shovel_mese", {
	original_description = "Mese Shovel",
	description = toolranks.create_description("Mese Shovel"),
	after_use = toolranks.new_afteruse})