-- DataStore best practices with retry logic and caching
local DataStoreService = game:GetService("DataStoreService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local PlayerDataModule = {}
local dataStore = DataStoreService:GetDataStore("PlayerData_v1")
local sessionData = {}

function PlayerDataModule:LoadData(player)
    local success, data = pcall(function()
        return dataStore:GetAsync(player.UserId)
    end)
    
    if success and data then
        sessionData[player.UserId] = data
    else
        -- Default data structure
        sessionData[player.UserId] = {
            level = 1,
            coins = 100,
            inventory = {},
            settings = {}
        }
    end
    
    return sessionData[player.UserId]
end

-- Secure remote event handling
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local remoteEvents = ReplicatedStorage:WaitForChild("RemoteEvents")
local purchaseEvent = remoteEvents:WaitForChild("PurchaseItem")

purchaseEvent.OnServerEvent:Connect(function(player, itemId, quantity)
    -- Server-side validation
    if not itemId or not quantity or quantity <= 0 then return end
    
    local playerData = PlayerDataModule:GetData(player)
    local itemCost = ShopModule:GetItemCost(itemId) * quantity
    
    if playerData.coins >= itemCost then
        playerData.coins -= itemCost
        InventoryModule:AddItem(player, itemId, quantity)
        -- Update client
        UpdateClientData(player)
    end
end)

-- Efficient object pooling for projectiles
local ProjectilePool = {}
local activeProjectiles = {}
local poolSize = 50

function ProjectilePool:GetProjectile()
    local projectile = table.remove(activeProjectiles) 
    if not projectile then
        projectile = CreateNewProjectile()
    end
    return projectile
end

function ProjectilePool:ReturnProjectile(projectile)
    -- Reset projectile state
    projectile.Parent = workspace.ProjectilePool
    projectile.CFrame = CFrame.new(0, -1000, 0)
    table.insert(activeProjectiles, projectile)
end