local holding_shift = false

local tasks = {0}
function inventory_upgrades.effect_upgrade_item(item)
	if (item:clsid() == "WP_BINOC") or (ui_options.get("gameplay/general/mechanic_feature") ~= true) then 
		return
	end
	
	local npc = get_speaker()
	if (npc) then
		if (holding_shift) then
			tasks = {tasks[1] + 1, item, npc}
		else
			inventory_upgrades.lend_item_for_repair(item,npc:section(),1800)
		end
	end
end 

local function on_key_hold(key)
	if (key == DIK_keys["DIK_LSHIFT"]) then
		holding_shift = true
	end
end

local function on_key_release(key)
	if (key == DIK_keys["DIK_LSHIFT"]) then
		holding_shift = false

		if (tasks[1] > 0) then
			inventory_upgrades.lend_item_for_repair(tasks[2],tasks[3]:section(),1800*tasks[1])
			tasks = {0}
		end
	end
end

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