-- Aliases to convert from legacy node/item names

technic.legacy_nodenames = {
	["technic:alloy_furnace"]        = "technic:lv_alloy_furnace",
	["technic:alloy_furnace_active"] = "technic:lv_alloy_furnace_active",
	["technic:battery_box"]  = "technic:lv_battery_box0",
	["technic:battery_box1"] = "technic:lv_battery_box1",
	["technic:battery_box2"] = "technic:lv_battery_box2",
	["technic:battery_box3"] = "technic:lv_battery_box3",
	["technic:battery_box4"] = "technic:lv_battery_box4",
	["technic:battery_box5"] = "technic:lv_battery_box5",
	["technic:battery_box6"] = "technic:lv_battery_box6",
	["technic:battery_box7"] = "technic:lv_battery_box7",
	["technic:battery_box8"] = "technic:lv_battery_box8",
	["technic:electric_furnace"]        = "technic:lv_electric_furnace",
	["technic:electric_furnace_active"] = "technic:lv_electric_furnace_active",
	["technic:grinder"]        = "technic:lv_grinder",
	["technic:grinder_active"] = "technic:lv_grinder_active",
	["technic:extractor"]        = "technic:lv_extractor",
	["technic:extractor_active"] = "technic:lv_extractor_active",
	["technic:compressor"]        = "technic:lv_compressor",
	["technic:compressor_active"] = "technic:lv_compressor_active",
	["technic:hv_battery_box"] = "technic:hv_battery_box0",
	["technic:mv_battery_box"] = "technic:mv_battery_box0",
	["technic:generator"]        = "technic:lv_generator",
	["technic:generator_active"] = "technic:lv_generator_active",
	["technic:iron_dust"] = "technic:wrought_iron_dust",
	["technic:enriched_uranium"] = "technic:uranium35_ingot",
}

for old, new in pairs(technic.legacy_nodenames) do
	minetest.register_alias(old, new)
end

for i = 0, 64 do
	minetest.register_alias("technic:hv_cable"..i, "technic:hv_cable")
	minetest.register_alias("technic:mv_cable"..i, "technic:mv_cable")
	minetest.register_alias("technic:lv_cable"..i, "technic:lv_cable")
end

-- Item meta

-- Meta keys that have changed
technic.legacy_meta_keys = {
	["charge"] = "technic:charge",
}

-- Converts legacy itemstack metadata string to itemstack meta and returns the ItemStackMetaRef
function technic.get_stack_meta(itemstack)
	local meta = itemstack:get_meta()
	local legacy_string = meta:get("") -- Get deprecated metadata
	if legacy_string then
		local legacy_table = minetest.deserialize(legacy_string)
		if legacy_table then
			local table = meta:to_table()
			for k, v in pairs(legacy_table) do
				table.fields[technic.legacy_meta_keys[k] or k] = v
			end
			meta:from_table(table)
		end
		meta:set_string("", "") -- Remove deprecated metadata
	end
	return meta
end

-- Same as technic.get_stack_meta for cans.
-- (Cans didn't store a serialized table in the legacy metadata string, but just a number.)
function technic.get_stack_meta_cans(itemstack)
	local meta = itemstack:get_meta()
	local legacy_string = meta:get("") -- Get deprecated metadata
	if legacy_string then
		meta:set_string("can_level", legacy_string)
		meta:set_string("", "") -- Remove deprecated metadata
		return meta
	end
	return meta
end