fun_caves = {}
fun_caves.version = "1.0"
fun_caves.time_factor = 10  -- affects growth abms
fun_caves.light_max = 8  -- light intensity for mushroom growth
fun_caves.path = minetest.get_modpath(minetest.get_current_modname())
fun_caves.world = minetest.get_worldpath()

fun_caves.elixir_armor = minetest.setting_getbool('fun_caves_use_armor_elixirs')
if fun_caves.elixir_armor == nil then
	fun_caves.elixir_armor = true
end

fun_caves.expire_elixir_on_death = minetest.setting_getbool('fun_caves_expire_elixir_on_death')
if fun_caves.expire_elixir_on_death == nil then
	fun_caves.expire_elixir_on_death = true
end

fun_caves.exploding_fungi = minetest.setting_getbool('fun_caves_exploding_fungi')
if fun_caves.exploding_fungi == nil then
	fun_caves.exploding_fungi = true
end

fun_caves.breakable_wood = minetest.setting_getbool('fun_caves_breakable_wood')
if fun_caves.breakable_wood == nil then
	fun_caves.breakable_wood = false
end

fun_caves.DEBUG = false  -- for maintenance only



local inp = io.open(fun_caves.world..'/fun_caves_data.txt','r')
if inp then
	local d = inp:read('*a')
	fun_caves.db = minetest.deserialize(d)
	inp.close()
end
if not fun_caves.db then
	fun_caves.db = {}
end
for _, i in pairs({'teleport_data', 'hunger'}) do
	if not fun_caves.db[i] then
		fun_caves.db[i] = {}
	end
end


-- whether to use biomes and heightmap
fun_caves.use_bi_hi = false
local mg_params = minetest.get_mapgen_params()
if mg_params and mg_params.mgname ~= "v6" and mg_params.mgname ~= "v5" then
	fun_caves.use_bi_hi = true
end


minetest.register_on_mapgen_init(function(mgparams)
	minetest.set_mapgen_params({flags="nocaves,nodungeons"})
end)


-- Check if the table contains an element.
function table.contains(table, element)
  for key, value in pairs(table) do
    if value == element then
			if key then
				return key
			else
				return true
			end
    end
  end
  return false
end

-- Modify a node to add a group
function minetest.add_group(node, groups)
	local def = minetest.registered_items[node]
	if not def then
		return false
	end
	local def_groups = def.groups or {}
	for group, value in pairs(groups) do
		if value ~= 0 then
			def_groups[group] = value
		else
			def_groups[group] = nil
		end
	end
	minetest.override_item(node, {groups = def_groups})
	return true
end

function fun_caves.clone_node(name)
	local node = minetest.registered_nodes[name]
	local node2 = table.copy(node)
	return node2
end


--dofile(fun_caves.path .. "/recipe_list.lua")

dofile(fun_caves.path .. "/abms.lua")
dofile(fun_caves.path .. "/nodes.lua")
dofile(fun_caves.path .. "/deco.lua")
dofile(fun_caves.path .. "/fungal_tree.lua")
dofile(fun_caves.path .. "/elixir.lua")
dofile(fun_caves.path .. "/wallhammer.lua")
dofile(fun_caves.path .. "/mapgen.lua")
dofile(fun_caves.path .. "/chat.lua")

if mobs and mobs.mod == "redo" then
	dofile(fun_caves.path .. "/mobs.lua")
end

--fun_caves.print_recipes()


local hunger_mod = minetest.get_modpath("hunger")
fun_caves.hunger_id = {}

function fun_caves.hunger_change(player, change)
	local name = player:get_player_name()
	if hunger_mod then
		if change < 0 then
			hunger.update_hunger(player, hunger.players[name].lvl + change * 4)
		end
		return
	end

	local hp = player:get_hp()
	if change < 0 or hp >= 16 then
		fun_caves.db.hunger[name] = math.min(20, math.max(0, fun_caves.db.hunger[name] + change))
		player:hud_change(fun_caves.hunger_id[name], 'number', fun_caves.db.hunger[name])
		if fun_caves.db.hunger[name] == 0 then
			player:set_hp(player:get_hp() - 1)
		end
	end
end

if not hunger_mod then
	minetest.register_on_joinplayer(function(player)
		local name = player:get_player_name()

		if not fun_caves.db.hunger[name] then
			fun_caves.db.hunger[name] = 20
		end

		local hunger_bar = {
			hud_elem_type = 'statbar',
			position = {x=0.52, y=0.883},
			name = "hunger",
			text = "farming_bread.png",
			number = fun_caves.db.hunger[name],
			direction = 0,
			size = { x=24, y=24 },
		}

		fun_caves.hunger_id[name] = player:hud_add(hunger_bar)
	end)

	minetest.register_on_item_eat(function(hp_change, replace_with_item, itemstack, user, pointed_thing)
		if hp_change > 0 then
			fun_caves.hunger_change(user, hp_change)
		end
	end)

	minetest.register_on_dieplayer(function(player)
		local name = player:get_player_name()
		local pos = vector.round(player:getpos())

		if not hunger_mod then
			fun_caves.db.hunger[name] = 20
			player:hud_change(fun_caves.hunger_id[name], 'number', 20)
		end

		minetest.chat_send_player(name, 'Your bones will lie at ('..pos.x..','..pos.y..','..pos.z..'), in ignominy, unless you collect them.')
	end)
end