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--    ██    ██    ██ ██   ██ ██    ██ ██
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--    ██    ██    ██ ██   ██ ██    ██      ██
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local function parse_params_torus(params_text)
	local parts = worldeditadditions.split(params_text, "%s+", false)
	print("[DEBUG:torus/parts]")
	for i = 1, #parts, 1 do print(parts[i]) end
	-- local found, _, major_radius, minor_radius, replace_node, axes = params_text:find("([0-9]+)%s+([0-9]+)%s+([a-z:_\\-]+)%s+([xyz]+)")
	
	if #parts < 3 then return nil, nil, nil end
	
	if #parts < 1 then
		return false, "Error: Invalid replace_node."
	end
	if #parts < 2 then
		return false, "Error: Invalid major radius (expected integer greater than 0)"
	end
	if #parts < 3 then
		return false, "Error: Invalid minor radius (expected integer greater than 0)"
	end
	
	local major_radius = tonumber(parts[1])
	local minor_radius = tonumber(parts[2])
	local replace_node = worldedit.normalize_nodename(parts[3])
	local axes
	if #parts > 3 then axes = parts[4] end
	if not axes then axes = "xy" end
	
	if major_radius < 1 then
		return false, "Error: The major radius must be greater than 0."
	end
	if minor_radius < 1 then
		return false, "Error: The minor radius must be greater than 0."
	end
	if not replace_node then
		return false, "Error: Invalid node name."
	end
	if axes:find("[^xyz]") then
		return false, "Error: The axes may only contain the latters x, y, and z."
	end
	if #axes ~= 2 then
		return false, "Error: Exactly 2 axes must be specified. For example, 'xy' is valid, but 'xyy' is not (both of course without quotes)."
	end
	
	
	-- Sort the axis names (this is important to ensure we can identify the direction properly)
	if axes == "yx" then axes = "xy" end
	if axes == "zx" then axes = "xz" end
	if axes == "zy" then axes = "yz" end
	
	return true, replace_node, major_radius, minor_radius, axes
end

worldedit.register_command("torus", {
	params = "<major_radius> <minor_radius> <replace_node> [<axes=xy>]",
	description = "Creates a 3D torus with a major radius of <major_radius> and a minor radius of <minor_radius> at pos1, filled with <replace_node>, on axes <axes> (i.e. 2 axis names: xz, zy, etc).",
	privs = { worldedit = true },
	require_pos = 1,
	parse = function(params_text)
		local values = {parse_params_torus(params_text)}
		return unpack(values)
	end,
	nodes_needed = function(name, target_node, major_radius, minor_radius)
		return math.ceil(2 * math.pi*math.pi * major_radius * minor_radius*minor_radius)
	end,
	func = function(name, target_node, major_radius, minor_radius, axes)
		local start_time = worldeditadditions.get_ms_time()
		local replaced = worldeditadditions.torus(worldedit.pos1[name], major_radius, minor_radius, target_node, axes, false)
		local time_taken = worldeditadditions.get_ms_time() - start_time
		
		minetest.log("action", name .. " used //torus at " .. worldeditadditions.vector.tostring(worldedit.pos1[name]) .. ", replacing " .. replaced .. " nodes in " .. time_taken .. "s")
		return true, replaced .. " nodes replaced in " .. worldeditadditions.format.human_time(time_taken)
	end
})

-- TODO: This duplicates a lot of code. Perhaps we can trim it down a bit?
worldedit.register_command("hollowtorus", {
	params = "<major_radius> <minor_radius> <replace_node> [<axes=xy>]",
	description = "Creates a 3D hollow torus with a major radius of <major_radius> and a minor radius of <minor_radius> at pos1, made out of <replace_node>, on axes <axes> (i.e. 2 axis names: xz, zy, etc).",
	privs = { worldedit = true },
	require_pos = 1,
	parse = function(params_text)
		local values = {parse_params_torus(params_text)}
		return unpack(values)
	end,
	nodes_needed = function(name, target_node, major_radius, minor_radius, axes)
		return math.ceil(2 * math.pi*math.pi * major_radius * minor_radius*minor_radius)
	end,
	func = function(name, target_node, major_radius, minor_radius)
		local start_time = worldeditadditions.get_ms_time()
		local replaced = worldeditadditions.torus(worldedit.pos1[name], major_radius, minor_radius, target_node, axes, true)
		local time_taken = worldeditadditions.get_ms_time() - start_time
		
		minetest.log("action", name .. " used //hollowtorus at " .. worldeditadditions.vector.tostring(worldedit.pos1[name]) .. ", replacing " .. replaced .. " nodes in " .. time_taken .. "s")
		return true, replaced .. " nodes replaced in " .. worldeditadditions.format.human_time(time_taken)
	end
})