minetest.register_privilege("worldedit", "Can use WorldEdit commands")

worldedit.set_pos = {}
worldedit.inspect = {}

worldedit.pos1 = {}
worldedit.pos2 = {}
if minetest.place_schematic then
	worldedit.prob_pos = {}
	worldedit.prob_list = {}
end

dofile(minetest.get_modpath("worldedit_commands") .. "/cuboid.lua")
dofile(minetest.get_modpath("worldedit_commands") .. "/mark.lua")
local safe_region, check_region = dofile(minetest.get_modpath("worldedit_commands") .. "/safe.lua")

local function get_position(name) --position 1 retrieval function for when not using `safe_region`
	local pos1 = worldedit.pos1[name]
	if pos1 == nil then
		worldedit.player_notify(name, "no position 1 selected")
	end
	return pos1
end

local function get_node(name, nodename)
	local node = worldedit.normalize_nodename(nodename)
	if not node then
		worldedit.player_notify(name, "invalid node name: " .. nodename)
		return nil
	end
	return node
end

-- Gets the individual parameters from a command from the command's parameter string.
local function process_params(paramStr)
   local count = 0
   local paramList = {}
   for param in paramStr:gmatch("%S+") do
  	  count = count + 1
	  paramList[count] = param
   end

   return paramList, count
end

function worldedit.player_notify(name, message)
	minetest.chat_send_player(name, "WorldEdit -!- " .. message, false)
end

--determines whether `nodename` is a valid node name, returning a boolean
worldedit.normalize_nodename = function(nodename)
	nodename = nodename:gsub("^%s*(.-)%s*$", "%1")
	if nodename == "" then return nil end
	local fullname = ItemStack({name=nodename}):get_name() --resolve aliases of node names to full names
	if minetest.registered_nodes[fullname] or fullname == "air" then --directly found node name or alias of nodename
		return fullname
	end
	for key, value in pairs(minetest.registered_nodes) do
		if key:find(":" .. nodename, 1, true) then --found in mod
			return key
		end
	end
	nodename = nodename:lower() --lowercase both for case insensitive comparison
	for key, value in pairs(minetest.registered_nodes) do
		if value.description:lower() == nodename then --found in description
			return key
		end
	end
	return nil
end

-- Determines the axis in which a player is facing, returning an axis ("x", "y", or "z") and the sign (1 or -1)
function worldedit.player_axis(name)
	local dir = minetest.get_player_by_name(name):get_look_dir()
	local x, y, z = math.abs(dir.x), math.abs(dir.y), math.abs(dir.z)
	if x > y then
		if x > z then
			return "x", dir.x > 0 and 1 or -1
		end
	elseif y > z then
		return "y", dir.y > 0 and 1 or -1
	end
	return "z", dir.z > 0 and 1 or -1
end

-- Gets the axis letter, and sign (either +1 or -1) from an argument (such as '+x', '-y', etc.).
-- This function can be used for manually specifying an axis and direction as an argument
function worldedit.arg_axis(param)
   if 2 == string.len(param) then
	  local sign = string.sub(param, 1, 1)
	  local axis = string.sub(param, 2, 2)
	  if '+' == sign then
		 sign = 1
	  elseif '-' == sign then
		 sign = -1
	  else
		 return nil
	  end

	  if not ("x" == axis or "y" == axis or "z" == axis) then
		 return nil
	  end
	  
	  return axis, sign
   else
	  return nil
   end
end

local function mkdir(path)
	if minetest.mkdir then
		minetest.mkdir(path)
	else
		os.execute('mkdir "' .. path .. '"')
	end
end

local function check_filename(name)
	return name:find("^[%w%s%^&'@{}%[%],%$=!%-#%(%)%%%.%+~_]+$") ~= nil
end


minetest.register_chatcommand("/about", {
	params = "",
	description = "Get information about the mod",
	func = function(name, param)
		worldedit.player_notify(name, "WorldEdit " .. worldedit.version_string .. " is available on this server. Type /help to get a list of commands, or get more information at https://github.com/Uberi/MineTest-WorldEdit/")
	end,
})

minetest.register_chatcommand("/inspect", {
	params = "on/off/1/0/true/false/yes/no/enable/disable/<blank>",
	description = "Enable or disable node inspection",
	privs = {worldedit=true},
	func = function(name, param)
		if param == "on" or param == "1" or param == "true" or param == "yes" or param == "enable" or param == "" then
			worldedit.inspect[name] = true
			local axis, sign = worldedit.player_axis(name)
			worldedit.player_notify(name, string.format("inspector: inspection enabled for %s, currently facing the %s axis",
				name, axis .. (sign > 0 and "+" or "-")))
		elseif param == "off" or param == "0" or param == "false" or param == "no" or param == "disable" then
			worldedit.inspect[name] = nil
			worldedit.player_notify(name, "inspector: inspection disabled")
		else
			worldedit.player_notify(name, "invalid usage: " .. param)
		end
	end,
})

minetest.register_on_punchnode(function(pos, node, puncher)
	local name = puncher:get_player_name()
	if worldedit.inspect[name] then
		if minetest.check_player_privs(name, {worldedit=true}) then
			local axis, sign = worldedit.player_axis(name)
			message = string.format("inspector: %s at %s (param1=%d, param2=%d) punched by %s facing the %s axis",
				node.name, minetest.pos_to_string(pos), node.param1, node.param2, name, axis .. (sign > 0 and "+" or "-"))
		else
			message = "inspector: worldedit privileges required"
		end
		worldedit.player_notify(name, message)
	end
end)

minetest.register_chatcommand("/reset", {
	params = "",
	description = "Reset the region so that it is empty",
	privs = {worldedit=true},
	func = function(name, param)
		worldedit.pos1[name] = nil
		worldedit.pos2[name] = nil
		worldedit.mark_pos1(name)
		worldedit.mark_pos2(name)
		worldedit.set_pos[name] = nil
		worldedit.player_notify(name, "region reset")
	end,
})

minetest.register_chatcommand("/mark", {
	params = "",
	description = "Show markers at the region positions",
	privs = {worldedit=true},
	func = function(name, param)
		worldedit.mark_pos1(name)
		worldedit.mark_pos2(name)
		worldedit.player_notify(name, "region marked")
	end,
})

minetest.register_chatcommand("/unmark", {
	params = "",
	description = "Hide markers if currently shown",
	privs = {worldedit=true},
	func = function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		worldedit.pos1[name] = nil
		worldedit.pos2[name] = nil
		worldedit.mark_pos1(name)
		worldedit.mark_pos2(name)
		worldedit.pos1[name] = pos1
		worldedit.pos2[name] = pos2
		worldedit.player_notify(name, "region unmarked")
	end,
})

minetest.register_chatcommand("/pos1", {
	params = "",
	description = "Set WorldEdit region position 1 to the player's location",
	privs = {worldedit=true},
	func = function(name, param)
		local pos = minetest.get_player_by_name(name):getpos()
		pos.x, pos.y, pos.z = math.floor(pos.x + 0.5), math.floor(pos.y + 0.5), math.floor(pos.z + 0.5)
		worldedit.pos1[name] = pos
		worldedit.mark_pos1(name)
		worldedit.player_notify(name, "position 1 set to " .. minetest.pos_to_string(pos))
	end,
})

minetest.register_chatcommand("/pos2", {
	params = "",
	description = "Set WorldEdit region position 2 to the player's location",
	privs = {worldedit=true},
	func = function(name, param)
		local pos = minetest.get_player_by_name(name):getpos()
		pos.x, pos.y, pos.z = math.floor(pos.x + 0.5), math.floor(pos.y + 0.5), math.floor(pos.z + 0.5)
		worldedit.pos2[name] = pos
		worldedit.mark_pos2(name)
		worldedit.player_notify(name, "position 2 set to " .. minetest.pos_to_string(pos))
	end,
})

minetest.register_chatcommand("/p", {
	params = "set/set1/set2/get",
	description = "Set WorldEdit region, WorldEdit position 1, or WorldEdit position 2 by punching nodes, or display the current WorldEdit region",
	privs = {worldedit=true},
	func = function(name, param)
		if param == "set" then --set both WorldEdit positions
			worldedit.set_pos[name] = "pos1"
			worldedit.player_notify(name, "select positions by punching two nodes")
		elseif param == "set1" then --set WorldEdit position 1
			worldedit.set_pos[name] = "pos1only"
			worldedit.player_notify(name, "select position 1 by punching a node")
		elseif param == "set2" then --set WorldEdit position 2
			worldedit.set_pos[name] = "pos2"
			worldedit.player_notify(name, "select position 2 by punching a node")
		elseif param == "get" then --display current WorldEdit positions
			if worldedit.pos1[name] ~= nil then
				worldedit.player_notify(name, "position 1: " .. minetest.pos_to_string(worldedit.pos1[name]))
			else
				worldedit.player_notify(name, "position 1 not set")
			end
			if worldedit.pos2[name] ~= nil then
				worldedit.player_notify(name, "position 2: " .. minetest.pos_to_string(worldedit.pos2[name]))
			else
				worldedit.player_notify(name, "position 2 not set")
			end
		else
			worldedit.player_notify(name, "unknown subcommand: " .. param)
		end
	end,
})

minetest.register_chatcommand("/fixedpos", {
	params = "set1/set2 x y z",
	description = "Set a WorldEdit region position to the position at (<x>, <y>, <z>)",
	privs = {worldedit=true},
	func = function(name, param)
		local found, _, flag, x, y, z = param:find("^(set[12])%s+([+-]?%d+)%s+([+-]?%d+)%s+([+-]?%d+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return
		end
		local pos = {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
		if flag == "set1" then
			worldedit.pos1[name] = pos
			worldedit.mark_pos1(name)
			worldedit.player_notify(name, "position 1 set to " .. minetest.pos_to_string(pos))
		else --flag == "set2"
			worldedit.pos2[name] = pos
			worldedit.mark_pos2(name)
			worldedit.player_notify(name, "position 2 set to " .. minetest.pos_to_string(pos))
		end
	end,
})

minetest.register_on_punchnode(function(pos, node, puncher)
	local name = puncher:get_player_name()
	if name ~= "" and worldedit.set_pos[name] ~= nil then --currently setting position
		if worldedit.set_pos[name] == "pos1" then --setting position 1
			worldedit.pos1[name] = pos
			worldedit.mark_pos1(name)
			worldedit.set_pos[name] = "pos2" --set position 2 on the next invocation
			worldedit.player_notify(name, "position 1 set to " .. minetest.pos_to_string(pos))
		elseif worldedit.set_pos[name] == "pos1only" then --setting position 1 only
			worldedit.pos1[name] = pos
			worldedit.mark_pos1(name)
			worldedit.set_pos[name] = nil --finished setting positions
			worldedit.player_notify(name, "position 1 set to " .. minetest.pos_to_string(pos))
		elseif worldedit.set_pos[name] == "pos2" then --setting position 2
			worldedit.pos2[name] = pos
			worldedit.mark_pos2(name)
			worldedit.set_pos[name] = nil --finished setting positions
			worldedit.player_notify(name, "position 2 set to " .. minetest.pos_to_string(pos))
		elseif worldedit.set_pos[name] == "prob" then --setting Minetest schematic node probabilities
			worldedit.prob_pos[name] = pos
			minetest.show_formspec(puncher:get_player_name(), "prob_val_enter", "field[text;;]")
		end
	end
end)

minetest.register_chatcommand("/volume", {
	params = "",
	description = "Display the volume of the current WorldEdit region",
	privs = {worldedit=true},
	func = function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		if pos1 == nil or pos2 == nil then
			worldedit.player_notify(name, "no region selected")
			return nil
		end

		local volume = worldedit.volume(pos1, pos2)
		local abs = math.abs
		worldedit.player_notify(name, "current region has a volume of " .. volume .. " nodes ("
			.. abs(pos2.x - pos1.x) + 1 .. "*"
			.. abs(pos2.y - pos1.y) + 1 .. "*"
			.. abs(pos2.z - pos1.z) + 1 .. ")")
	end,
})

minetest.register_chatcommand("/deleteblocks", {
	params = "",
	description = "remove all MapBlocks (16x16x16) containing the selected area from the map",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		local success = minetest.delete_area(pos1, pos2)
		if success then
			worldedit.player_notify(name, "Area deleted.")
		else
			worldedit.player_notify(name, "There was an error during deletion of the area.")
		end
	end),
})

minetest.register_chatcommand("/set", {
	params = "<node>",
	description = "Set the current WorldEdit region to <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local node = get_node(name, param)
		if not node then
			worldedit.player_notify(name, "Could not identify node \"" .. param .. "\"")
			return
		end

		local count = worldedit.set(worldedit.pos1[name], worldedit.pos2[name], node)
		worldedit.player_notify(name, count .. " nodes set")
	end, check_region),
})

minetest.register_chatcommand("/mix", {
	params = "<node1> ...",
	description = "Fill the current WorldEdit region with a random mix of <node1>, ...",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local nodes = {}
		for nodename in param:gmatch("[^%s]+") do
			local node = get_node(name, nodename)
			if not node then
				worldedit.player_notify(name, "Could not identify node \"" .. name .. "\"")
				return
			end
			nodes[#nodes + 1] = node
		end

		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		local count = worldedit.set(pos1, pos2, nodes)
		worldedit.player_notify(name, count .. " nodes set")
	end, check_region),
})

local check_replace = function(name, param)
	local found, _, searchnode, replacenode = param:find("^([^%s]+)%s+(.+)$")
	if found == nil then
		worldedit.player_notify(name, "invalid usage: " .. param)
		return nil
	end
	local newsearchnode = worldedit.normalize_nodename(searchnode)
	if not newsearchnode then
		worldedit.player_notify(name, "invalid search node name: " .. searchnode)
		return nil
	end
	local newreplacenode = worldedit.normalize_nodename(replacenode)
	if not newreplacenode then
		worldedit.player_notify(name, "invalid replace node name: " .. replacenode)
		return nil
	end
	return check_region(name, param)
end

minetest.register_chatcommand("/replace", {
	params = "<search node> <replace node>",
	description = "Replace all instances of <search node> with <replace node> in the current WorldEdit region",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, search_node, replace_node = param:find("^([^%s]+)%s+(.+)$")
		local norm_search_node = worldedit.normalize_nodename(search_node)
		local norm_replace_node = worldedit.normalize_nodename(replace_node)
		local count = worldedit.replace(worldedit.pos1[name], worldedit.pos2[name],
				norm_search_node, norm_replace_node)
		worldedit.player_notify(name, count .. " nodes replaced")
	end, check_replace),
})

minetest.register_chatcommand("/replaceinverse", {
	params = "<search node> <replace node>",
	description = "Replace all nodes other than <search node> with <replace node> in the current WorldEdit region",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, search_node, replace_node = param:find("^([^%s]+)%s+(.+)$")
		local norm_search_node = worldedit.normalize_nodename(search_node)
		local norm_replace_node = worldedit.normalize_nodename(replace_node)
		local count = worldedit.replace(worldedit.pos1[name], worldedit.pos2[name],
				norm_search_node, norm_replace_node, true)
		worldedit.player_notify(name, count .. " nodes replaced")
	end, check_replace),
})

local check_sphere = function(name, param)
	if worldedit.pos1[name] == nil then
		worldedit.player_notify(name, "no position 1 selected")
		return nil
	end
	local found, _, radius, nodename = param:find("^(%d+)%s+(.+)$")
	if found == nil then
		worldedit.player_notify(name, "invalid usage: " .. param)
		return nil
	end
	local node = get_node(name, nodename)
	if not node then return nil end
	return math.ceil((4 * math.pi * (tonumber(radius) ^ 3)) / 3) --volume of sphere
end

minetest.register_chatcommand("/hollowsphere", {
	params = "<radius> <node>",
	description = "Add hollow sphere centered at WorldEdit position 1 with radius <radius>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, radius, nodename = param:find("^(%d+)%s+(.+)$")
		local node = get_node(name, nodename)
		local count = worldedit.sphere(worldedit.pos1[name], tonumber(radius), node, true)
		worldedit.player_notify(name, count .. " nodes added")
	end, check_sphere),
})

minetest.register_chatcommand("/sphere", {
	params = "<radius> <node>",
	description = "Add sphere centered at WorldEdit position 1 with radius <radius>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, radius, nodename = param:find("^(%d+)%s+(.+)$")
		local node = get_node(name, nodename)
		local count = worldedit.sphere(worldedit.pos1[name], tonumber(radius), node)
		worldedit.player_notify(name, count .. " nodes added")
	end, check_sphere),
})

local check_dome = function(name, param)
	if worldedit.pos1[name] == nil then
		worldedit.player_notify(name, "no position 1 selected")
		return nil
	end
	local found, _, radius, nodename = param:find("^(%d+)%s+(.+)$")
	if found == nil then
		worldedit.player_notify(name, "invalid usage: " .. param)
		return nil
	end
	local node = get_node(name, nodename)
	if not node then return nil end
	return math.ceil((2 * math.pi * (tonumber(radius) ^ 3)) / 3) --volume of dome
end

minetest.register_chatcommand("/hollowdome", {
	params = "<radius> <node>",
	description = "Add hollow dome centered at WorldEdit position 1 with radius <radius>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, radius, nodename = param:find("^(%d+)%s+(.+)$")
		local node = get_node(name, nodename)
		local count = worldedit.dome(worldedit.pos1[name], tonumber(radius), node, true)
		worldedit.player_notify(name, count .. " nodes added")
	end, check_dome),
})

minetest.register_chatcommand("/dome", {
	params = "<radius> <node>",
	description = "Add dome centered at WorldEdit position 1 with radius <radius>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, radius, nodename = param:find("^(%d+)%s+(.+)$")
		local node = get_node(name, nodename)
		local count = worldedit.dome(worldedit.pos1[name], tonumber(radius), node)
		worldedit.player_notify(name, count .. " nodes added")
	end, check_dome),
})

local check_cylinder = function(name, param)
	if worldedit.pos1[name] == nil then
		worldedit.player_notify(name, "no position 1 selected")
		return nil
	end
	local found, _, axis, length, radius, nodename = param:find("^([xyz%?])%s+([+-]?%d+)%s+(%d+)%s+(.+)$")
	if found == nil then
		worldedit.player_notify(name, "invalid usage: " .. param)
		return nil
	end
	local node = get_node(name, nodename)
	if not node then return nil end
	return math.ceil(math.pi * (tonumber(radius) ^ 2) * tonumber(length))
end

minetest.register_chatcommand("/hollowcylinder", {
	params = "x/y/z/? <length> <radius> <node>",
	description = "Add hollow cylinder at WorldEdit position 1 along the x/y/z/? axis with length <length> and radius <radius>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, axis, length, radius, nodename = param:find("^([xyz%?])%s+([+-]?%d+)%s+(%d+)%s+(.+)$")
		length = tonumber(length)
		if axis == "?" then
			axis, sign = worldedit.player_axis(name)
			length = length * sign
		end
		local node = get_node(name, nodename)
		local count = worldedit.cylinder(worldedit.pos1[name], axis, length, tonumber(radius), node, true)
		worldedit.player_notify(name, count .. " nodes added")
	end, check_cylinder),
})

minetest.register_chatcommand("/cylinder", {
	params = "x/y/z/? <length> <radius> <node>",
	description = "Add cylinder at WorldEdit position 1 along the x/y/z/? axis with length <length> and radius <radius>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, axis, length, radius, nodename = param:find("^([xyz%?])%s+([+-]?%d+)%s+(%d+)%s+(.+)$")
		length = tonumber(length)
		if axis == "?" then
			axis, sign = worldedit.player_axis(name)
			length = length * sign
		end
		local node = get_node(name, nodename)
		local count = worldedit.cylinder(worldedit.pos1[name], axis, length, tonumber(radius), node)
		worldedit.player_notify(name, count .. " nodes added")
	end, check_cylinder),
})

minetest.register_chatcommand("/pyramid", {
	params = "x/y/z/? <height> <node>",
	description = "Add pyramid centered at WorldEdit position 1 along the x/y/z/? axis with height <height>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, axis, height, nodename = param:find("^([xyz%?])%s+([+-]?%d+)%s+(.+)$")
		height = tonumber(height)
		if axis == "?" then
			axis, sign = worldedit.player_axis(name)
			height = height * sign
		end
		local node = get_node(name, nodename)
		local count = worldedit.pyramid(worldedit.pos1[name], axis, height, node)
		worldedit.player_notify(name, count .. " nodes added")
	end,
	function(name, param)
		if worldedit.pos1[name] == nil then
			worldedit.player_notify(name, "no position 1 selected")
			return nil
		end
		local found, _, axis, height, nodename = param:find("^([xyz%?])%s+([+-]?%d+)%s+(.+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return nil
		end
		local node = get_node(name, nodename)
		if not node then return nil end
		height = tonumber(height)
		return math.ceil(((height * 2 + 1) ^ 2) * height / 3)
	end),
})

minetest.register_chatcommand("/spiral", {
	params = "<length> <height> <space> <node>",
	description = "Add spiral centered at WorldEdit position 1 with side length <length>, height <height>, space between walls <space>, composed of <node>",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, length, height, space, nodename = param:find("^(%d+)%s+(%d+)%s+(%d+)%s+(.+)$")
		local node = get_node(name, nodename)
		local count = worldedit.spiral(worldedit.pos1[name], tonumber(length), tonumber(height), tonumber(space), node)
		worldedit.player_notify(name, count .. " nodes added")
	end,
	function(name, param)
		if worldedit.pos1[name] == nil then
			worldedit.player_notify(name, "no position 1 selected")
			return nil
		end
		local found, _, length, height, space, nodename = param:find("^(%d+)%s+(%d+)%s+(%d+)%s+(.+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return nil
		end
		local node = get_node(name, nodename)
		if not node then return nil end
		return check_region(name, param)
	end),
})

minetest.register_chatcommand("/copy", {
	params = "x/y/z/? <amount>",
	description = "Copy the current WorldEdit region along the x/y/z/? axis by <amount> nodes",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, axis, amount = param:find("^([xyz%?])%s+([+-]?%d+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return
		end
		amount = tonumber(amount)
		if axis == "?" then
			axis, sign = worldedit.player_axis(name)
			amount = amount * sign
		end

		local count = worldedit.copy(worldedit.pos1[name], worldedit.pos2[name], axis, amount)
		worldedit.player_notify(name, count .. " nodes copied")
	end,
	function(name, param)
		local volume = check_region(name, param)
		return volume and volume * 2 or volume
	end),
})

minetest.register_chatcommand("/move", {
	params = "x/y/z/? <amount>",
	description = "Move the current WorldEdit region along the x/y/z/? axis by <amount> nodes",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		local found, _, axis, amount = param:find("^([xyz%?])%s+([+-]?%d+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return
		end
		amount = tonumber(amount)
		if axis == "?" then
			axis, sign = worldedit.player_axis(name)
			amount = amount * sign
		end

		local count = worldedit.move(pos1, pos2, axis, amount)

		pos1[axis] = pos1[axis] + amount
		pos2[axis] = pos2[axis] + amount
		worldedit.mark_pos1(name)
		worldedit.mark_pos2(name)
		worldedit.player_notify(name, count .. " nodes moved")
	end, check_region),
})

minetest.register_chatcommand("/stack", {
	params = "x/y/z/? <count>",
	description = "Stack the current WorldEdit region along the x/y/z/? axis <count> times",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, axis, repetitions = param:find("^([xyz%?])%s+([+-]?%d+)$")
		repetitions = tonumber(repetitions)
		if axis == "?" then
			axis, sign = worldedit.player_axis(name)
			repetitions = repetitions * sign
		end
		local count = worldedit.stack(worldedit.pos1[name], worldedit.pos2[name], axis, repetitions)
		worldedit.player_notify(name, count .. " nodes stacked")
	end,
	function(name, param)
		local found, _, axis, repetitions = param:find("^([xyz%?])%s+([+-]?%d+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return
		end
		local count = check_region(name, param)
		if count then return (tonumber(repetitions) + 1) * count end
		return nil
	end),
})

minetest.register_chatcommand("/stack2", {
	params = "<count> <x> <y> <z>",
	description = "Stack the current WorldEdit region <count> times by offset <x>, <y>, <z>",
	privs = {worldedit=true},
	func = function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		if pos1 == nil or pos2 == nil then
			worldedit.player_notify(name, "Select a position first!")
			return
		end
		local repetitions, incs = param:match("(%d+)%s*(.+)")
		if repetitions == nil then
			worldedit.player_notify(name, "invalid count: " .. param)
			return
		end
		repetitions = tonumber(repetitions)

		local x, y, z = incs:match("([+-]?%d+) ([+-]?%d+) ([+-]?%d+)")
		if x == nil then
			worldedit.player_notify(name, "invalid increments: " .. param)
			return
		end
		x, y, z = tonumber(x), tonumber(y), tonumber(z)

		local count = worldedit.volume(pos1, pos2) * repetitions

		return safe_region(function()
			worldedit.stack2(pos1, pos2, {x=x, y=y, z=z}, repetitions,
				function() worldedit.player_notify(name, count .. " nodes stacked") end)
		end, function()
			return count
		end)(name,param) -- more hax --wip: clean this up a little bit
	end
})


minetest.register_chatcommand("/stretch", {
	params = "<stretchx> <stretchy> <stretchz>",
	description = "Scale the current WorldEdit positions and region by a factor of <stretchx>, <stretchy>, <stretchz> along the X, Y, and Z axes, repectively, with position 1 as the origin",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		local found, _, stretchx, stretchy, stretchz = param:find("^(%d+)%s+(%d+)%s+(%d+)$")
		stretchx, stretchy, stretchz = tonumber(stretchx), tonumber(stretchy), tonumber(stretchz)
		local count, pos1, pos2 = worldedit.stretch(pos1, pos2, stretchx, stretchy, stretchz)

		--reset markers to scaled positions
		worldedit.pos1[name] = pos1
		worldedit.pos2[name] = pos2
		worldedit.mark_pos1(name)
		worldedit.mark_pos2(name)

		worldedit.player_notify(name, count .. " nodes stretched")
	end,
	function(name, param)
		local found, _, stretchx, stretchy, stretchz = param:find("^(%d+)%s+(%d+)%s+(%d+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return nil
		end
		stretchx, stretchy, stretchz = tonumber(stretchx), tonumber(stretchy), tonumber(stretchz)
		if stretchx == 0 or stretchy == 0 or stretchz == 0 then
			worldedit.player_notify(name, "invalid scaling factors: " .. param)
		end
		local count = check_region(name, param)
		if count then return tonumber(stretchx) * tonumber(stretchy) * tonumber(stretchz) * count end
		return nil
	end),
})

minetest.register_chatcommand("/transpose", {
	params = "x/y/z/? x/y/z/?",
	description = "Transpose the current WorldEdit region along the x/y/z/? and x/y/z/? axes",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		local found, _, axis1, axis2 = param:find("^([xyz%?])%s+([xyz%?])$")
		if axis1 == "?" then axis1 = worldedit.player_axis(name) end
		if axis2 == "?" then axis2 = worldedit.player_axis(name) end
		local count, pos1, pos2 = worldedit.transpose(pos1, pos2, axis1, axis2)

		--reset markers to transposed positions
		worldedit.pos1[name] = pos1
		worldedit.pos2[name] = pos2
		worldedit.mark_pos1(name)
		worldedit.mark_pos2(name)

		worldedit.player_notify(name, count .. " nodes transposed")
	end,
	function(name, param)
		local found, _, axis1, axis2 = param:find("^([xyz%?])%s+([xyz%?])$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return nil
		end
		if axis1 == axis2 then
			worldedit.player_notify(name, "invalid usage: axes must be different")
			return nil
		end
		return check_region(name, param)
	end),
})

minetest.register_chatcommand("/flip", {
	params = "x/y/z/?",
	description = "Flip the current WorldEdit region along the x/y/z/? axis",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		if param == "?" then param = worldedit.player_axis(name) end
		local count = worldedit.flip(worldedit.pos1[name], worldedit.pos2[name], param)
		worldedit.player_notify(name, count .. " nodes flipped")
	end,
	function(name, param)
		if param ~= "x" and param ~= "y" and param ~= "z" and param ~= "?" then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return nil
		end
		return check_region(name, param)
	end),
})

minetest.register_chatcommand("/rotate", {
	params = "<axis> <angle>",
	description = "Rotate the current WorldEdit region around the axis <axis> by angle <angle> (90 degree increment)",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local pos1, pos2 = worldedit.pos1[name], worldedit.pos2[name]
		local found, _, axis, angle = param:find("^([xyz%?])%s+([+-]?%d+)$")
		if axis == "?" then axis = worldedit.player_axis(name) end
		local count, pos1, pos2 = worldedit.rotate(pos1, pos2, axis, angle)

		--reset markers to rotated positions
		worldedit.pos1[name] = pos1
		worldedit.pos2[name] = pos2
		worldedit.mark_pos1(name)
		worldedit.mark_pos2(name)

		worldedit.player_notify(name, count .. " nodes rotated")
	end,
	function(name, param)
		local found, _, axis, angle = param:find("^([xyz%?])%s+([+-]?%d+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return nil
		end
		if angle % 90 ~= 0 then
			worldedit.player_notify(name, "invalid usage: angle must be multiple of 90")
			return nil
		end
		return check_region(name, param)
	end),
})

minetest.register_chatcommand("/orient", {
	params = "<angle>",
	description = "Rotate oriented nodes in the current WorldEdit region around the Y axis by angle <angle> (90 degree increment)",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local found, _, angle = param:find("^([+-]?%d+)$")
		local count = worldedit.orient(worldedit.pos1[name], worldedit.pos2[name], angle)
		worldedit.player_notify(name, count .. " nodes oriented")
	end,
	function(name, param)
		local found, _, angle = param:find("^([+-]?%d+)$")
		if found == nil then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return nil
		end
		if angle % 90 ~= 0 then
			worldedit.player_notify(name, "invalid usage: angle must be multiple of 90")
			return nil
		end
		return check_region(name, param)
	end),
})

minetest.register_chatcommand("/fixlight", {
	params = "",
	description = "Fix the lighting in the current WorldEdit region",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local count = worldedit.fixlight(worldedit.pos1[name], worldedit.pos2[name])
		worldedit.player_notify(name, count .. " nodes updated")
	end),
})

minetest.register_chatcommand("/drain", {
	params = "",
	description = "Remove any fluid node within the current WorldEdit region",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		-- TODO: make an API function for this
		local count = 0
		local pos1, pos2 = worldedit.sort_pos(worldedit.pos1[name], worldedit.pos2[name])
		for x = pos1.x, pos2.x do
		for y = pos1.y, pos2.y do
		for z = pos1.z, pos2.z do
			local n = minetest.get_node({x=x, y=y, z=z}).name
			local d = minetest.registered_nodes[n]
			if d ~= nil and (d["drawtype"] == "liquid" or d["drawtype"] == "flowingliquid") then
				minetest.remove_node({x=x, y=y, z=z})
				count = count + 1
			end
		end
		end
		end
		worldedit.player_notify(name, count .. " nodes updated")
	end),
})

minetest.register_chatcommand("/hide", {
	params = "",
	description = "Hide all nodes in the current WorldEdit region non-destructively",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local count = worldedit.hide(worldedit.pos1[name], worldedit.pos2[name])
		worldedit.player_notify(name, count .. " nodes hidden")
	end),
})

minetest.register_chatcommand("/suppress", {
	params = "<node>",
	description = "Suppress all <node> in the current WorldEdit region non-destructively",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local node = get_node(name, param)
		local count = worldedit.suppress(worldedit.pos1[name], worldedit.pos2[name], node)
		worldedit.player_notify(name, count .. " nodes suppressed")
	end, check_region),
})

minetest.register_chatcommand("/highlight", {
	params = "<node>",
	description = "Highlight <node> in the current WorldEdit region by hiding everything else non-destructively",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local node = get_node(name, param)
		local count = worldedit.highlight(worldedit.pos1[name], worldedit.pos2[name], node)
		worldedit.player_notify(name, count .. " nodes highlighted")
	end, check_region),
})

minetest.register_chatcommand("/restore", {
	params = "",
	description = "Restores nodes hidden with WorldEdit in the current WorldEdit region",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local count = worldedit.restore(worldedit.pos1[name], worldedit.pos2[name])
		worldedit.player_notify(name, count .. " nodes restored")
	end),
})

minetest.register_chatcommand("/save", {
	params = "<file>",
	description = "Save the current WorldEdit region to \"(world folder)/schems/<file>.we\"",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		if param == "" then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return
		end
		if not check_filename(param) then
			worldedit.player_notify(name, "Disallowed file name: " .. param)
			return
		end
		local result, count = worldedit.serialize(worldedit.pos1[name],
				worldedit.pos2[name])

		local path = minetest.get_worldpath() .. "/schems"
		-- Create directory if it does not already exist
		mkdir(path)

		local filename = path .. "/" .. param .. ".we"
		local file, err = io.open(filename, "wb")
		if err ~= nil then
			worldedit.player_notify(name, "Could not save file to \"" .. filename .. "\"")
			return
		end
		file:write(result)
		file:flush()
		file:close()

		worldedit.player_notify(name, count .. " nodes saved")
	end),
})

minetest.register_chatcommand("/allocate", {
	params = "<file>",
	description = "Set the region defined by nodes from \"(world folder)/schems/<file>.we\" as the current WorldEdit region",
	privs = {worldedit=true},
	func = function(name, param)
		local pos = get_position(name)
		if pos == nil then return end

		if param == "" then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return
		end
		if not check_filename(param) then
			worldedit.player_notify(name, "Disallowed file name: " .. param)
			return
		end

		local filename = minetest.get_worldpath() .. "/schems/" .. param .. ".we"
		local file, err = io.open(filename, "rb")
		if err ~= nil then
			worldedit.player_notify(name, "could not open file \"" .. filename .. "\"")
			return
		end
		local value = file:read("*a")
		file:close()

		local version = worldedit.read_header(value)
		if version == 0 then
			worldedit.player_notify(name, "File is invalid!")
			return
		elseif version > worldedit.LATEST_SERIALIZATION_VERSION then
			worldedit.player_notify(name, "File was created with newer version of WorldEdit!")
		end
		local nodepos1, nodepos2, count = worldedit.allocate(pos, value)

		worldedit.pos1[name] = nodepos1
		worldedit.mark_pos1(name)
		worldedit.pos2[name] = nodepos2
		worldedit.mark_pos2(name)

		worldedit.player_notify(name, count .. " nodes allocated")
	end,
})

minetest.register_chatcommand("/load", {
	params = "<file>",
	description = "Load nodes from \"(world folder)/schems/<file>[.we[m]]\" with position 1 of the current WorldEdit region as the origin",
	privs = {worldedit=true},
	func = function(name, param)
		local pos = get_position(name)
		if pos == nil then return end

		if param == "" then
			worldedit.player_notify(name, "invalid usage: " .. param)
			return
		end
		if not string.find(param, "^[%w \t.,+-_=!@#$%%^&*()%[%]{};'\"]+$") then
			worldedit.player_notify(name, "invalid file name: " .. param)
			return
		end

		--find the file in the world path
		local testpaths = {
			minetest.get_worldpath() .. "/schems/" .. param,
			minetest.get_worldpath() .. "/schems/" .. param .. ".we",
			minetest.get_worldpath() .. "/schems/" .. param .. ".wem",
		}
		local file, err
		for index, path in ipairs(testpaths) do
			file, err = io.open(path, "rb")
			if not err then
				break
			end
		end
		if err then
			worldedit.player_notify(name, "could not open file \"" .. param .. "\"")
			return
		end
		local value = file:read("*a")
		file:close()

		local version = worldedit.read_header(value)
		if version == 0 then
			worldedit.player_notify(name, "File is invalid!")
			return
		elseif version > worldedit.LATEST_SERIALIZATION_VERSION then
			worldedit.player_notify(name, "File was created with newer version of WorldEdit!")
			return
		end

		local count = worldedit.deserialize(pos, value)

		worldedit.player_notify(name, count .. " nodes loaded")
	end,
})

minetest.register_chatcommand("/lua", {
	params = "<code>",
	description = "Executes <code> as a Lua chunk in the global namespace",
	privs = {worldedit=true, server=true},
	func = function(name, param)
		local admin = minetest.setting_get("name")
		if not admin or not name == admin then
			worldedit.player_notify(name, "this command can only be run by the server administrator")
			return
		end
		local err = worldedit.lua(param)
		if err then
			worldedit.player_notify(name, "code error: " .. err)
		else
			worldedit.player_notify(name, "code successfully executed", false)
		end
	end,
})

minetest.register_chatcommand("/luatransform", {
	params = "<code>",
	description = "Executes <code> as a Lua chunk in the global namespace with the variable pos available, for each node in the current WorldEdit region",
	privs = {worldedit=true, server=true},
	func = safe_region(function(name, param)
		local admin = minetest.setting_get("name")
		if not admin or not name == admin then
			worldedit.player_notify(name, "this command can only be run by the server administrator")
			return
		end

		local err = worldedit.luatransform(worldedit.pos1[name], worldedit.pos2[name], param)
		if err then
			worldedit.player_notify(name, "code error: " .. err, false)
		else
			worldedit.player_notify(name, "code successfully executed", false)
		end
	end),
})

minetest.register_chatcommand("/mtschemcreate", {
	params = "<file>",
	description = "Save the current WorldEdit region using the Minetest "..
		"Schematic format to \"(world folder)/schems/<filename>.mts\"",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		if param == nil then
			worldedit.player_notify(name, "No filename specified")
			return
		end
		if not check_filename(param) then
			worldedit.player_notify(name, "Disallowed file name: " .. param)
			return
		end

		local path = minetest.get_worldpath() .. "/schems"
		-- Create directory if it does not already exist
		mkdir(path)

		local filename = path .. "/" .. param .. ".mts"
		local ret = minetest.create_schematic(worldedit.pos1[name],
				worldedit.pos2[name], worldedit.prob_list[name],
				filename)
		if ret == nil then
			worldedit.player_notify(name, "Failed to create Minetest schematic", false)
		else
			worldedit.player_notify(name, "Saved Minetest schematic to " .. param, false)
		end
		worldedit.prob_list[name] = {}
	end),
})

minetest.register_chatcommand("/mtschemplace", {
	params = "<file>",
	description = "Load nodes from \"(world folder)/schems/<file>.mts\" with position 1 of the current WorldEdit region as the origin",
	privs = {worldedit=true},
	func = function(name, param)
		if param == "" then
			worldedit.player_notify(name, "no filename specified")
			return
		end
		if not check_filename(param) then
			worldedit.player_notify(name, "Disallowed file name: " .. param)
			return
		end

		local pos = get_position(name)
		if pos == nil then return end

		local path = minetest.get_worldpath() .. "/schems/" .. param .. ".mts"
		if minetest.place_schematic(pos, path) == nil then
			worldedit.player_notify(name, "failed to place Minetest schematic", false)
		else
			worldedit.player_notify(name, "placed Minetest schematic " .. param ..
				" at " .. minetest.pos_to_string(pos), false)
		end
	end,
})

minetest.register_chatcommand("/mtschemprob", {
	params = "start/finish/get",
	description = "Begins node probability entry for Minetest schematics, gets the nodes that have probabilities set, or ends node probability entry",
	privs = {worldedit=true},
	func = function(name, param)
		if param == "start" then --start probability setting
			worldedit.set_pos[name] = "prob"
			worldedit.prob_list[name] = {}
			worldedit.player_notify(name, "select Minetest schematic probability values by punching nodes")
		elseif param == "finish" then --finish probability setting
			worldedit.set_pos[name] = nil
			worldedit.player_notify(name, "finished Minetest schematic probability selection")
		elseif param == "get" then --get all nodes that had probabilities set on them
			local text = ""
			local problist = worldedit.prob_list[name]
			if problist == nil then
				return
			end
			for k,v in pairs(problist) do
				local prob = math.floor(((v["prob"] / 256) * 100) * 100 + 0.5) / 100
				text = text .. minetest.pos_to_string(v["pos"]) .. ": " .. prob .. "% | "
			end
			worldedit.player_notify(name, "currently set node probabilities:")
			worldedit.player_notify(name, text)
		else
			worldedit.player_notify(name, "unknown subcommand: " .. param)
		end
	end,
})

-- Expands or contracts the region for user <name.
-- <param> contains the parameters passed to the //expand or //contract command.
-- If invert is true, contract instead.
local function expand_region(name, param, invert)
    local params, paramCount = process_params(param)
    local count = nil
    local axis = nil
    local sign = nil

	if nil == worldedit.pos1[name] or nil == worldedit.pos2[name] then
	    worldedit.player_notify(name, "no region selected")
	    return
    end 
	   
    if 0 < paramCount then
	    count = tonumber(params[1])
    else
	    worldedit.player_notify(name, "not enough arguments")
	    return
    end
    
    if nil == count then
	    worldedit.player_notify(name, "not a valid integer: " .. params[1])
	    return
    end

    if 1 < paramCount then
	    axis, sign = worldedit.arg_axis(params[2])
	    if nil == axis then
		    worldedit.player_notify(name, "not a valid axis: " .. params[2])
		    return
	    end
    else
	    axis, sign = worldedit.player_axis(name)
    end

	if sign < 0 then
	    count = 0 - count
	end

	if invert then
	    sign = 0 - sign
	end

    if (worldedit.pos1[name][axis] > worldedit.pos2[name][axis]) == (0 < sign) then
	    worldedit.pos1[name][axis] = worldedit.pos1[name][axis] + count
	    worldedit.mark_pos1(name)
    else
	    worldedit.pos2[name][axis] = worldedit.pos2[name][axis] + count
	    worldedit.mark_pos2(name)
    end
end

minetest.register_chatcommand("/expand", {
	params = "<count> <+/-><x/y/z>",
	description = "Expands the worldedit selection by the specified amount in the direction the player is facing or the one specified.",,
	privs = {worldedit=true},
	func = function(name, param)
	   return expand_region(name, param, false)
	end,
})

minetest.register_chatcommand("/contract", {
	params = "<count> <+/-><x/y/z>",
	description = "Contracts the worldedit selection by the specified amount in the direction the player is facing or the one specified.",
	privs = {worldedit=true},
	func = function(name, param)
	   return expand_region(name, param, true)
	end,
})


minetest.register_on_player_receive_fields(
	function(player, formname, fields)
		if (formname == "prob_val_enter") and (fields.text ~= "") then
			local name = player:get_player_name()
			local prob_entry = {pos=worldedit.prob_pos[name], prob=tonumber(fields.text)}
			local index = table.getn(worldedit.prob_list[name]) + 1
			worldedit.prob_list[name][index] = prob_entry
		end
	end
)

minetest.register_chatcommand("/clearobjects", {
	params = "",
	description = "Clears all objects within the WorldEdit region",
	privs = {worldedit=true},
	func = safe_region(function(name, param)
		local count = worldedit.clear_objects(worldedit.pos1[name], worldedit.pos2[name])
		worldedit.player_notify(name, count .. " objects cleared")
	end),
})