local previous_slot

function toggle_pda()
    -- PDA Map
    local pda3d = get_console_cmd(1, "g_3d_pda")
    if not pda3d then return end
    
    local pda_menu = ActorMenu.get_pda_menu()
    if not pda_menu:IsShown() and db.actor:item_in_slot(8) then
        -- printf("save slot %s", db.actor:active_slot())
        previous_slot = db.actor:active_slot()
    elseif pda_menu:IsShown() and previous_slot then
        
        -- Postpone on next tick
        CreateTimeEvent("pda_restore_slot", "pda_restore_slot", 0, function()
            -- printf("restore slot %s", previous_slot)
            db.actor:activate_slot(previous_slot)
            previous_slot = nil
            return true
        end)
    end
end

function on_key_press(key)    
    if key == DIK_keys.DIK_ESCAPE or dik_to_bind(key) == 51 then
        toggle_pda()
    end
end

-- Special case for map key
function on_key_release(key)    
    if dik_to_bind(key) == key_bindings.kCUSTOM20 then
        toggle_pda()
    end
end

function on_game_start()
    RegisterScriptCallback("on_key_press", on_key_press)
    RegisterScriptCallback("on_key_release", on_key_release)
end