minetest.debug("sparkdebug init")

local NAME = minetest.get_current_modname()
local PATH = minetest.get_modpath(NAME) .."/"
local Files = {"multimeter"}

sparktech = {
  print = function(string)
    minetest.chat_send_player(sparktech["player"]:get_player_name(), string)
  end,
  last_command = "",
  energy_hud = {}
}

minetest.register_node("sparkdebug:d_block", {
  description = "Debug Block",
  tiles = {"debug.png"},
  groups = {oddly_breakable_by_hand = 1}
})

for i=1,table.getn(Files),1
do
  dofile(PATH .. Files[i] .. ".lua")
end

minetest.register_craftitem("sparkdebug:tablet", {
  description = "Tablet",
  inventory_image = "tablet.png",
  on_use = function(itemstack, user, pointed_thing)
		minetest.show_formspec(user:get_player_name(), "sparkdebug:f_laptop",
				"size[10,10]" ..
				"label[0,0;Execute]" ..
				"field[1,5;8,1;code;Code;]" ..
				"button_exit[4,8;2,1;exit;Send]" ..
        "button_exit[4,6;2,1;last;Last]")
	end
})

-- Register callback
minetest.register_on_player_receive_fields(function(player, form, fields)
	if form ~= "sparkdebug:f_laptop" then
		return false
	end

  if fields.last then
    fields.code = sparktech["last_command"]
  end
  sparktech["player"] = player
  sparktech["last_command"] = fields.code

  --[[local func = loadstring(fields.code)()
  local val = func.init()
  local ret = "No return value"
  if not (val == nil) then
    ret = val
  end]]--

  local suc, val = pcall(loadstring, fields.code)
  local ret = "E"
  if suc then
    _, ret = pcall(val, sparktech)
  else
    ret = val
  end
  if ret == nil then
    ret = "[did not return]"
  end
	minetest.chat_send_player(player:get_player_name(), ret)
	return true
end)

minetest.register_craftitem("sparkdebug:multimeter", {
  description = "Multimeter",
  inventory_image = "multimeter.png"
})

minetest.debug("sparkdebug init complete")