---------------------------------
---------Formspec Editor---------
---------------------------------
-----------By ExeVirus-----------

--Fix builtin
minetest.register_alias("mapgen_stone", "air")
minetest.register_alias("mapgen_water_source", "air")

--Variables
local modpath = minetest.get_modpath("formspec_edit")
local insecure_env = minetest.request_insecure_environment()
local update_time = tonumber(minetest.settings:get("formspec_editor.update_time")) or 0.2

local error_formspec = [[
formspec_version[4]
size[8,2]
label[0.375,0.5;Error:formspec.spec is either ]
label[0.375,1;non-existent,or empty]
]]

--Crash if not singleplayer
--TODO: hide the 'Host server' checkbox in main menu then possible
if not minetest.is_singleplayer() then
	error("[formspec_editor] This game doesn't work in multiplayer!")
end

--function declarations
local update_formspec = nil
local load_formspec = nil
local turn_off_hud = nil
local set_sky

--Registrations

-----------------------------------
--on_joinplayer()
-----------------------------------
minetest.register_on_joinplayer(
function(player_ref,_)
	turn_off_hud(player_ref)
	set_sky(player_ref)
end
)
-----------------------------------
--on_player_receive_fields()
-----------------------------------
minetest.register_on_player_receive_fields(
function(player_ref, _, fields)
	if(fields.quit) then
		minetest.request_shutdown()
	end
	update_formspec(player_ref:get_player_name())
end
)

--function definitions

-----------------------------------
--update_formspec()
-----------------------------------
update_formspec = function(player_name)
	minetest.after(0.1, function(name)
		minetest.show_formspec(name, "fs", load_formspec())
	end, player_name)
end

-----------------------------------
--load_formspec()
-----------------------------------
load_formspec = function()
	local io = insecure_env.io
	local file = io.open(modpath .. "/formspec.spec", "rb")
	if file == nil then
		return error_formspec
	else
		local content = file:read("*all")
		file:close()
		if content == nil then
			return error_formspec
		else
			return content
		end
	end
end

-----------------------------------
--turn_off_hud()
-----------------------------------
turn_off_hud = function(player_ref)
	local flags = {
		hotbar = false,
		healthbar = false,
		crosshair = false,
		wielditem = false,
		breathbar = false,
		minimap = false,
		minimap_radar = false,
	}
	player_ref:hud_set_flags(flags)
end

-----------------------------------
--set_sky()
-----------------------------------
set_sky = function(player_ref)
	local sky = {
		base_color = "#AAF",
		type = "plain",
		clouds = false,
	}
	player_ref:set_sky(sky)
	player_ref:override_day_night_ratio(0)
end

local time = 0
minetest.register_globalstep(function(dtime)
	time = time + dtime
	if time >= update_time then
		local player = minetest.get_connected_players()[1]
		if player then
			update_formspec(player:get_player_name())
		end
		time = 0
	end
end)