-- 獲取 DataStoreService
local DataStoreService = game:GetService("DataStoreService")

-- 獲取 GlobalDataStore 實例
local GlobalDataStore = DataStoreService:GetGlobalDataStore()

print(GlobalDataStore.Name) -- 輸出 GlobalDataStore 的名稱

local DataStoreService = game:GetService("DataStoreService")
local pointsStore = DataStoreService:GetOrderedDataStore("Points")

local function printTopTenPlayers()
	local isAscending = false
	local pageSize = 10
	local pages = pointsStore:GetSortedAsync(isAscending, pageSize)
	local topTen = pages:GetCurrentPage()

	-- 'topTen' 中的數據 是以索引為頁面上的索引進行存儲
	-- 對於每個項目，'data.key' 是有序數據存儲中的鍵，而 'data.value' 是值
	for rank, data in ipairs(topTen) do
		local name = data.key
		local points = data.value
		print(name .. " 的排名是 #" .. rank .. "，得分是 " .. points .. " 分")
	end

	-- 可能加載下一頁...
	--pages:AdvanceToNextPageAsync()
end

-- 創建一些數據
pointsStore:SetAsync("Alex", 55)
pointsStore:SetAsync("Charley", 32)
pointsStore:SetAsync("Sydney", 68)

-- 顯示前十名 玩家
printTopTenPlayers()

local DataStoreService = game:GetService("DataStoreService")

local globalStore = DataStoreService:GetGlobalDataStore()

local function printBudget()
	local budget = DataStoreService:GetRequestBudgetForRequestType(Enum.DataStoreRequestType.SetIncrementAsync)
	print("當前的設置/增量預算:", budget)
end

for i = 1, 5 do
	local key = "key" .. i
	local success, err = pcall(function()
		globalStore:SetAsync(key, true)
	end)
	if success then
		printBudget()
	else
		print(err)
	end
end

local MigrateScript = require(script.Parent.MigrateScript)
local DataStoreService = game:GetService("DataStoreService")

DataStoreService:SetRateLimitForRequestType(Enum.DataStoreRequestType.StandardRead, 1000, 0)
DataStoreService:SetRateLimitForRequestType(Enum.DataStoreRequestType.StandardWrite, 2000, 0) -- 兩次寫入，因此需要雙倍限制
DataStoreService:SetRateLimitForRequestType(Enum.DataStoreRequestType.StandardList, 100, 0)
DataStoreService:SetRateLimitForRequestType(Enum.DataStoreRequestType.StandardRemove, 1000, 0)

local sourceStore = DataStoreService:GetDataStore("ds_to_migrate")
local destinationStore1 = DataStoreService:GetDataStore("ds_destination_1")
local destinationStore2 = DataStoreService:GetDataStore("ds_destination_2")

-- 等待預算的助手
local function waitForBudget(requestType)
	while (DataStoreService:GetRequestBudgetForRequestType(requestType) <= 0) do
		task.wait(1)
	end
end

waitForBudget(Enum.DataStoreRequestType.StandardList)

local success, pages = pcall(function()
	return sourceStore:ListKeysAsync()
end)

if success then
	while true do
		local items = pages:GetCurrentPage()

		for _, item in ipairs(items) do

			-- 1. 從來源提取資料
			waitForBudget(Enum.DataStoreRequestType.StandardRead)
			local getSuccess, value = pcall(function()
				return sourceStore:GetAsync(item.KeyName)
			end)

			if getSuccess and value ~= nil then
				-- 2. 將資料遷移到目的地
				waitForBudget(Enum.DataStoreRequestType.StandardWrite)
				local setSuccess, err = pcall(function()
					destinationStore1:SetAsync(item.KeyName, MigrateScript.Migrate1(value))
				end)

				if setSuccess then
					print("成功將鍵遷移到目的地 1: " .. item.KeyName)
				else
					warn("Failed to migrate key to destination 1: " .. item.KeyName .. " - " .. tostring(err))
				end

waitForBudget(Enum.DataStoreRequestType.StandardWrite)
				local setSuccess, err = pcall(function()
					destinationStore2:SetAsync(item.KeyName, MigrateScript.Migrate2(value))
				end)

				if setSuccess then
					print("成功將鍵遷移到目的地 2: " .. item.KeyName)
				else
					warn("Failed to migrate key to destination 2: " .. item.KeyName .. " - " .. tostring(err))
				end

				-- 3. 從來源刪除資料
				waitForBudget(Enum.DataStoreRequestType.StandardRemove)
				local deleteSuccess, err = pcall(function()
					sourceStore:RemoveAsync(item.KeyName)
				end)

				if deleteSuccess then
					print("成功從來源刪除鍵: " .. item.KeyName)
				else
					warn("Failed to delete key from source: " .. item.KeyName .. " - " .. tostring(err))
				end
			else
				warn("無法從來源獲取鍵: " .. item.KeyName)
			end
		end

		if pages.IsFinished then break end

		-- 3. 前進頁面
		waitForBudget(Enum.DataStoreRequestType.StandardList)
		local nextSuccess = pcall(function()
			pages:AdvanceToNextPageAsync()
		end)

		if not nextSuccess then
			warn("無法前進到下一頁。")
			break
		end
	end
	print("遷移過程完成。")
else
	warn("無法列出鍵。")
end