local doc_identifier = {}
doc_identifier.huds = {}
doc_identifier.countdown_ids = {}

doc_identifier.identify = function(itemstack, user, pointed_thing)
	local username = user:get_player_name()
	if pointed_thing.type == "node" then
		local pos = pointed_thing.under
		local node = minetest.get_node(pos)
		if minetest.registered_nodes[node.name] ~= nil then
			local nodedef = minetest.registered_nodes[node.name]
			if(node.name == "ignore") then
				return itemstack
			end
			if doc.entry_exists("nodes", node.name) then
				doc.show_entry(username, "nodes", node.name)
			else
				minetest.show_formspec(
					username, 
					"doc_identifier:error_missing_node_info",
					"size[12,2;]label[0,0.2;The identifier was unable to extract information from this block.]button_exit[4.5,1.5;3,1;okay;OK]"
				)
			end
		end
	else
		return itemstack
	end

	return itemstack
end

function doc_identifier.solid_mode(itemstack, user, pointed_thing)
	return ItemStack("doc_identifier:identifier_solid")
end

function doc_identifier.liquid_mode(itemstack, user, pointed_thing)
	return ItemStack("doc_identifier:identifier_liquid")
end

minetest.register_tool("doc_identifier:identifier_solid", {
	description = "identification tool",
	tool_capabilities = {},
	range = 10,
	wield_image = "doc_identifier_identifier.png",
	inventory_image = "doc_identifier_identifier.png",
	liquids_pointable = false,
	on_use = doc_identifier.identify,
	on_place = doc_identifier.liquid_mode,
	on_secondary_use = doc_identifier.liquid_mode,
})
minetest.register_tool("doc_identifier:identifier_liquid", {
	description = "identification tool",
	tool_capabilities = {},
	range = 10,
	groups = { not_in_creative_inventory = 1 },
	wield_image = "doc_identifier_identifier_liquid.png",
	inventory_image = "doc_identifier_identifier_liquid.png",
	liquids_pointable = true,
	on_use = doc_identifier.identify,
	on_place = doc_identifier.solid_mode,
	on_secondary_use = doc_identifier.solid_mode,
})

minetest.register_alias("doc_identifier:identifier", "doc_identifier:identifier_solid")

-- Add documentation
doc.sub.minetest_game.add_helptexts(
	{ ["doc_identifier:identifier_solid"] = "This useful little helper can be used to quickly learn more about about one's closer environment. It identifies and analyzes blocks and it shows extensive information of a block on which it is used." },
	{ ["doc_identifier:identifier_solid"] = "Punch any block about you wish to learn more about. This will show you a help screen. The identification tool comes in two modes: Solid mode (red) and liquid mode (blue). In liquid mode this tool points to liquids as well while in solid mode this is not the case. Liquid mode is required if you want to identify a liquid. You change the mode with a rightclick." })