local groupdefs = {
	["book"] = "Books",
	["vessel"] = "Vessels",
	["dye"] = "Dyes",
	["wheat"] = "Wheat",
	["stick"] = "Sticks",
	["wool"] = "Wool",
	["sand"] = "Sand",
	["wood"] = "Wood",
	["stone"] = "Stone",
	["metal"] = "Metal",
	["tree"] = "Tree Trunks",
	["leaves"] = "Leaves and Needles",
	["flower"] = "Flowers",
	["sapling"] = "Saplings",
	["fleshy"] = "Flesh",
}

local minegroups = {
	["cracky"] = "Cracky",
	["crumbly"] = "Crumbly",
	["choppy"] = "Choppy",
	["snappy"] = "Snappy",
	["bendy"] = "Bendy",
	["oddly_breakable_by_hand"] = "Oddly breakable by hand",
}

local damagegroups= {
	["fleshy"] = "Flesh",
}

local forced_nodes = {
	"default:cloud",
	"bones:bones",
	"farming:soil",
	"farming:soil_wet",
	"farming:desert_sand_soil",
	"farming:desert_sand_soil_wet",
	"fire:basic_flame",
	"farming:wheat_8",
	"farming:cotton_8",
}

local item_name_overrides = {
	["screwdriver:screwdriver"] = "Screwdriver",
	["fire:basic_flame"] = "Basic Flame",
	["farming:wheat_8"] = "Wheat Plant",
	["farming:cotton_8"] = "Cotton Plant",
	["default:lava_source"] = "Lava",
	["default:water_source"] = "Water",
	["default:river_water_source"] = "River Water",
}

doc.sub.items.add_real_group_names(groupdefs)
doc.sub.items.add_mine_group_names(minegroups)
doc.sub.items.add_damage_group_names(damagegroups)
doc.sub.items.add_forced_node_entries(forced_nodes)
doc.sub.items.add_item_name_overrides(item_name_overrides)

--[[
			-- minetest_game factoids

			-- Fire
			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

			if data.def.groups.puts_out_fire ~= nil then
				formstring = formstring .. "This block will extinguish nearby fire.\n"
			end

			-- Other noteworthy groups
			if data.def.groups.flora == 1 then
				formstring = formstring .. "This block belongs to the Flora group. It a living organism which likes to grow and spread on dirt with grass or dirt with dry grass when it is in light. On desert sand, it will wither and die and turn into a dry shrub.\n"
			end

			if data.def.groups.soil == 1 then
				formstring = formstring .. "This block is natural soil. It supports the spreading of blocks belonging to the Flora group and the growth of blocks belonging to the Saplings group.\n"
			elseif data.def.groups.soil == 2 or data.def.groups.soil == 3 then
				formstring = formstring .. "This block serves as a soil for wild plants (Flora, Saplings) as well as plants grown from seeds. It supports their growth and spreading.\n"
			end
]]

-- Add node aliases
for i=2,5 do
	doc.add_entry_alias("nodes", "default:grass_1", "default:grass_"..i)
	doc.add_entry_alias("nodes", "default:dry_grass_1", "default:dry_grass_"..i)
end
for i=1,7 do
	doc.add_entry_alias("nodes", "farming:wheat_8", "farming:wheat_"..i)
	doc.add_entry_alias("nodes", "farming:cotton_8", "farming:cotton_"..i)
end
doc.add_entry_alias("nodes", "default:lava_source", "default:lava_flowing")
doc.add_entry_alias("nodes", "default:water_source", "default:water_flowing")
doc.add_entry_alias("nodes", "default:river_water_source", "default:river_water_flowing")

-- Gather help texts
dofile(minetest.get_modpath("doc_minetest_game") .. "/helptexts.lua")

-- Achievement
local awardchecktime = 0
if minetest.get_modpath("awards") ~= nil then
	-- TODO: Change the goal to unlocking/discovering all block entries of Minetest Game
	-- (excluding unused blocks like default:cloud)
	awards.register_achievement("doc_minetest_game_allnodes", {
		title = "Block Index Completed",
		icon = "doc_awards_icon_generic.png",
		description = "Read all help entries about blocks.",
	})

	minetest.register_globalstep(function(dtime)
		-- Check awards every 30 seconds
		awardchecktime = awardchecktime + dtime
		if awardchecktime < 30 then return end
		awardchecktime = 30 - awardchecktime
		local players = minetest.get_connected_players()
		for p=1,#players do
			local playername = players[p]:get_player_name()
			local count = doc.get_viewed_count(playername, "nodes")
			if count ~= nil and count >= doc.get_entry_count("nodes") then
				awards.unlock(playername, "doc_minetest_game_allnodes")
			end
		end
	end)
end