local groupdefs = {
}

local forced_nodes = {
	"bones:bones",
	"farming:soil",
	"farming:soil_wet",
	"farming:desert_sand_soil",
	"farming:desert_sand_soil_wet",
}

local groups_to_string = function(grouptable)
	local gstring = ""
	if #grouptable == 0 then
		return nil
	end
	for id, value in pairs(grouptable) do
		if groupdefs[id] ~= nil then
			gstring = gstring .. groupdefs[id][value] .. "\\, "
		end
	end
	return gstring
end

doc.new_category("nodes", {
	name = "Blocks",
	build_formspec = function(data)
		if data then
			local longdesc = data.longdesc or "N/A"
			local usagehelp = data.usagehelp or "N/A"
			local formstring = "item_image[11,0;1,1;"..data.itemstring.."]"
			formstring = formstring .. "textarea[0.25,1;10,8;;Description: "..longdesc.."\n\n"
			formstring = formstring .. "Usage: "..usagehelp .. "\n\n"
			formstring = formstring .. "Maximum stack size: "..data.def.stack_max.. "\n"

			local yesno = function(bool)
				if bool==true then return "Yes"
				elseif bool==false then return "No"
				else return "N/A" end
			end

			formstring = formstring .. "Collidable: "..yesno(data.def.walkable).. "\n"
			local liquid
			if data.def.liquidtype ~= "none" then liquid = true else liquid = false end
			formstring = formstring .. "Liquid: "..yesno(liquid).. "\n"
			if liquid then
				local range, renew, viscos
				if data.def.liquid_range then range = data.def.liquid_range else range = 8 end
				if data.def.liquid_renewable then range = data.def.liquid_renewable else renew = true end
				if data.def.liquid_viscosity then viscos = data.def.liquid_viscosity else viscosity = 0 end
				formstring = formstring .. "Liquid range: "..range.. "\n"
				formstring = formstring .. "Liquid viscosity: "..viscos.. "\n"
				formstring = formstring .. "Renewable liquid: "..yesno(renew).. "\n"
			end
			formstring = formstring .. "Pointable: "..yesno(data.def.pointable).. "\n"
			formstring = formstring .. "Transparent to sunlight: "..yesno(data.def.sunlight_propagates).. "\n"

			formstring = formstring .. "\n"

			-- Global factoids
			if data.def.buildable_to == true then
				formstring = formstring .. "This block will be replaced when building on it.\n"
			end
			if data.def.light_source == 15 then
				formstring = formstring .. "This block is a very bright source of light. It glows as bright the sun.\n"
			elseif data.def.light_source > 12 then
				formstring = formstring .. "This block is a bright source of light.\n"
			elseif data.def.light_source > 5 then
				formstring = formstring .. "This block is a source of light.\n"
			elseif data.def.light_source > 0 then
				formstring = formstring .. "This block is a source of light and glow faintly.\n"
			end
			if data.def.climbable == true then
				formstring = formstring .. "This block can be climbed.\n"
			end
			if data.def.damage_per_second > 1 then
				formstring = formstring .. "This block causes a damage of "..data.def.damage_per_second.." hit points per second.\n"
			elseif data.def.damage_per_second == 1 then
				formstring = formstring .. "This block causes a damage of "..data.def.damage_per_second.." hit point per second.\n"
			elseif data.def.damage_per_second < -1 then
				formstring = formstring .. "This block heals "..data.def.damage_per_second.." hit points per second.\n"
			elseif data.def.damage_per_second == -1 then
				formstring = formstring .. "This block heals "..data.def.damage_per_second.." hit point per second.\n"
			end
			if data.def.drowning > 0 then
				formstring = formstring .. "You will slowly lose breath in this block.\n"
			end

			if data.def.groups.immortal == 1 then
				formstring = formstring .. "This block can not be dug by ordinary digging tools.\n"
			end
			if data.def.groups.dig_immediate == 2 then
				formstring = formstring .. "This block can be dug by any tool in half a second.\n"
			elseif data.def.groups.dig_immediate == 3 then
				formstring = formstring .. "This block can be dug by any tool immediately.\n"
			end

			if data.def.groups.falling_node == 1 then
				formstring = formstring .. "This block is affected by gravity and can fall.\n"
			end
			if data.def.groups.attached_node == 1 then
				formstring = formstring .. "This block must be attached to another block\\, otherwise it will drop as an item.\n"
			end
			if data.def.groups.disable_jump == 1 then
				formstring = formstring .. "You can not jump while standing on this block.\n"
			end
			local fdap = data.def.groups.fall_damage_add_percent 
			if fdap ~= nil then
				if fdap > 0 then
					formstring = formstring .. "The fall damage is "..fdap.."% higher on this block.\n"
				elseif fdap == -100 then
					formstring = formstring .. "This block negates all fall damage.\n"
				else
					formstring = formstring .. "The fall damage is "..math.abs(fdap).."% lower on this block.\n"
				end
			end
			local bouncy = data.def.groups.bouncy
			if bouncy ~= nil then
				formstring = formstring .. "You will bounce on this block with a bounce speed of "..bouncy.."%.\n"
			end

			formstring = formstring .. "\n"

			-- minetest_game factoids
			if data.def.groups.flammable == 1 then
				formstring = formstring .. "This block is flammable and burns slowly.\n"
			elseif data.def.groups.flammable == 2 then
				formstring = formstring .. "This block is flammable and burns at medium speed.\n"
			elseif data.def.groups.flammable == 3 then
				formstring = formstring .. "This block is highly flammable and burns very quickly.\n"
			elseif data.def.groups.flammable == 4 then
				formstring = formstring .. "This block is very easily set on fire and burns extremely quickly.\n"
			elseif data.def.groups.flammable ~= nil then
				formstring = formstring .. "This block is flammable.\n"
			end

			formstring = formstring .. "\n"
			if data.def.groups.oddly_breakable_by_hand ~= nil then
				formstring = formstring .. "This block can be dug by hand.\n"
			end

			if data.def.groups.cracky == 1 then
				formstring = formstring .. "This block is slightly cracky and can be dug by a strong pickaxe.\n"
			elseif data.def.groups.cracky == 2 then
				formstring = formstring .. "This block is cracky and can be dug by a pickaxe.\n"
			elseif data.def.groups.cracky == 3 then
				formstring = formstring .. "This block is very cracky and can be dug easily by a pickaxe.\n"
			elseif data.def.groups.cracky ~= nil then
				formstring = formstring .. "This block is cracky in some way.\n"
			end


			if data.def.groups.crumbly == 1 then
				formstring = formstring .. "This block is slightly crumbly and can be dug by a good shovel.\n"
			elseif data.def.groups.crumbly == 2 then
				formstring = formstring .. "This block is crumbly and can be dug by a shovel.\n"
			elseif data.def.groups.crumbly == 3 then
				formstring = formstring .. "This block is very crumbly and can be dug easily by a shovel.\n"
			elseif data.def.groups.crumbly ~= nil then
				formstring = formstring .. "This block is crumbly in some way.\n"
			end

			if data.def.groups.explody == 1 then
				formstring = formstring .. "This block is a bit prone to explosions.\n"
			elseif data.def.groups.explody == 2 then
				formstring = formstring .. "This block is prone to explosions.\n"
			elseif data.def.groups.explody == 3 then
				formstring = formstring .. "This block is very prone to explosions and easily affected by them.\n"
			elseif data.def.groups.explody ~= nil then
				formstring = formstring .. "This block is prone to explosions to some extent.\n"
			end

			if data.def.groups.snappy == 1 then
				formstring = formstring .. "This block is slightly snappy and can be dug by fine tools.\n"
			elseif data.def.groups.snappy == 2 then
				formstring = formstring .. "This block is snappy and can be dug by fine tools.\n"
			elseif data.def.groups.snappy == 3 then
				formstring = formstring .. "This block is highly snappy and can be dug easily by fine tools.\n"
			elseif data.def.groups.snappy ~= nil then
				formstring = formstring .. "This block is to some extent snappy.\n"
			end

			if data.def.groups.choppy == 1 then
				formstring = formstring .. "This block is a bit choppy and can be dug by tools which involve brute force.\n"
			elseif data.def.groups.choppy == 2 then
				formstring = formstring .. "This block is choppy and can be dug by tools which involve brute force.\n"
			elseif data.def.groups.choppy == 3 then
				formstring = formstring .. "This block is highly choppy and can easily be dug by tools which involve brute force.\n"
			elseif data.def.groups.choppy ~= nil then
				formstring = formstring .. "This block is choppy to some extent.\n"
			end

			if data.def.groups.fleshy ~= nil then
				formstring = formstring .. "This block is made out of flesh.\n"
			end

			formstring = formstring .. "\n\n"
	
			-- Show other “exposable” groups
			local gstring = groups_to_string(data.def.groups)
			if gstring ~= nil then
				formstring = formstring .. "This block is member of the following additional groups: "..groups_to_string(data.def.groups).."\n"
			end
	
	
			formstring = formstring .. ";]"

			return formstring
		else
			return "label[0,1;NO DATA AVALIABLE!"
		end
	end
})

dofile(minetest.get_modpath("doc_minetest_game") .. "/helptexts.lua")

local function gather_descs()
	doc.new_entry("nodes", "air", {
		name = "Air",
		data = {
			itemstring = "air",
			longdesc = "A transparent block, basically empty space. It is usually left behind after digging something.",
			def = minetest.registered_nodes["air"],
		}
	})
	for id, def in pairs(minetest.registered_nodes) do
		local name, ld, uh
		name = def.description
		local forced = false
		for i=1, #forced_nodes do
			if name == forced_nodes then forced = true end
		end
		if not (name == nil or name == "" or def.groups.not_in_creative_inventory) or forced then
			if help.longdesc[id] ~= nil then
				ld = help.longdesc[id]
			end
			if help.usagehelp[id] ~= nil then
				uh = help.usagehelp[id]
			end
			local infotable = {
				name = name,
				data = {
					longdesc = ld,
					usagehelp = uh,
					itemstring = id,
					def = def,
				}
			}
			doc.new_entry("nodes", id, infotable) 
		end
	end
end

minetest.after(0, gather_descs)