-- assing ID at spawning (not at first talk) and log it
function yl_speak_up.on_spawn(self)
    --Let's protect it
    self.protected = true
    self.tamed = true
    self.object:set_armor_groups({immortal = 100})

    --Let's assign an ID (usually this happens at first talk)
    self = yl_speak_up.initialize_npc(self)

    if(not(self) or not(self.yl_speak_up) or not(self.yl_speak_up.id)) then
        -- something went very wrong
        return false
    end
    yl_speak_up.log_change("-", "n_"..self.yl_speak_up.id,
            "spawned at "..minetest.pos_to_string(self.object:get_pos()), "action")
    --Let's do it only once
    return true
end


-- thankyou flux for helping with this
function yl_speak_up.alias_mob(old_mob, new_mob)
    minetest.register_entity(
        ":" .. old_mob,
        {
            initial_properties = {
                physical = false,
                -- pointable = false,
                collide_with_objects = false,
                -- is_visible = false,
                glow = -1, -- disable light's effect on texture to make more visible in dark
                shaded = false,
                nametag = "Please /bug me",
                infotext = "I should have been an NPC\nbut something went wrong\nplease report to staff",
                static_save = true,
            },

            on_activate = function(self, staticdata)
                local new_entity
                local pos = self.object:get_pos()

                if pos and minetest.features.add_entity_with_staticdata then
                    -- if pos is nil then we don't know where we are and we can't add entity.
                    new_entity = minetest.add_entity(pos, new_mob, staticdata)
                end

                local data = minetest.deserialize(staticdata) or {}
                local pos_str = pos and minetest.pos_to_string(pos) or "NO_POS"
                local owner = data.owner or "NO_OWNER"
                local id = (data.yl_speak_up or {}).id or "NO_ID"

                if new_entity then
                    self.object:remove()
                    minetest.log("action", string.format("[yl_speak_up] alias_mob: converted %s ID:%s owned by %s to %s @ %s",
                                                         old_mob, id, owner, new_mob, pos_str)
                    )
                else
                    self.staticdata = staticdata
                    self.object:set_armor_groups({immortal = 1})
                    minetest.log("error", string.format("[yl_speak_up] alias_mob: error initializing %s ID:%s owned by %s @ %s, keeping %s for safe keeping",
                                                        new_mob, id, owner, pos_str, old_mob)
                    )
                end
            end,

            get_staticdata = function(self)
                return self.staticdata
            end,

            on_blast = function()
                return false, false, {}
            end,

            -- TODO allow STAFF to pick up with lasso and move?
	})
end


do
    local races = {'human', 'elf', 'dwarf', 'goblin', 'orc', 'npc'}
    for _, race in pairs(races) do
        -- alias entities
        yl_speak_up.alias_mob("yl_speak_up:" .. race, "yl_npc:" .. race)

        -- alias eggs for spawning new NPCs
        minetest.register_alias("yl_speak_up:" .. race, "yl_npc:" .. race)
        -- alias eggs that store NPCs picked up with a lasso
        minetest.register_alias("yl_speak_up:" .. race .. "_set", "yl_npc:" .. race .. "_set")
    end

end