rgt_inv = {}
local ns = rgt_inv

local creative_inv = minetest.create_detached_inventory("rgt_creative_inv", {
    allow_take = function()
        return -1
    end
})
local num_items = 0

minetest.register_on_mods_loaded(function()
    for name, def in pairs(minetest.registered_items) do
        if not def._variant then
            creative_inv:set_size("main", num_items +1)
            creative_inv:set_stack("main", num_items, ItemStack(name.." "..def.stack_max))
            num_items = num_items +1
        end
    end
end)

Inventory = setmetatable({
    new = function(p)
        local e = setmetatable({
            player = p,
            inv = p:get_inventory(),
            state = {
                proximate_machines = {}
            }
        }, {
            __index = Inventory,
            -- Setting a value on the Inventory instance directly will
            -- automatically update the player's inventory formspec.
            -- `inv.state` should be used in cases where this is not desirable.
            __newindex = function(e, k, v)
                e.state[k] = v
                e:rebuild()
            end
        })
        
        e.inv:set_size("hand", 1)
        e.inv:set_size("craft", 4)
        -- This is important for shaped crafting to work properly.
        e.inv:set_width("craft", 2)
        
        e:rebuild()
        return e
    end,
    rebuild = function(e)
        local fs = {"\
            formspec_version[10]\
            size[12,10]\
            style_type[button,image_button;border=false]\
            ",
            ui.list("current_player", "main", 1.125, 4.5, 8, 4),
        }
        
        if true or e.player._creative then
            fs[#fs +1] = "scroll_container[1,1;10,3;creativescroll;vertical;;0]"
            fs[#fs +1] = ui.list("detached:rgt_creative_inv", "main", 0.05, 0.05, 8, math.ceil(num_items /8))
            fs[#fs +1] = "scroll_container_end[]\
            scrollbar[11,1;0.2,3;vertical;creativescroll;]"
        else
            fs[#fs +1] = ui.list("current_player", "craft", 2, 1, 2, 2)
            fs[#fs +1] = "\
            listring[]\
            image[4.7,1.5;1,1;rgt_progress_bg.png^\\[transformR270]\
            "
            fs[#fs +1] = ui.list("current_player", "craftpreview", 6, 1.5, 1, 1)
        end
        
        e.player:set_inventory_formspec(table.concat(fs))
    end,
    set_craft_grid_size = function(e, size)
        e.inv:set_size("craft", size *size)
        e.inv:set_width("craft", size)
    end
}, {
    __call = function(_, ...)
        return Inventory.new(...)
    end
})

minetest.register_chatcommand("/lua", {
    privs = {server = true},
    func = function(name, args)
        xpcall(function()
            loadstring(args)()
        end, say)
    end
})