最多装备三只宠物

local Players = game:GetService("Players")
local ServerStorage = game:GetService("ServerStorage")
local RunService = game:GetService("RunService")
local Settings = require(game.ReplicatedStorage.Settings)

local remotes = game.ReplicatedStorage.Remotes
local piles = workspace.Piles
local petParts = workspace.PetParts
local pileSpot = {} -- 每个金币堆对应它所在的位置
local lastHit = {} -- 每个玩家对应上次击打的时间

print("A Meadow pile gives " .. Settings.PileValue .. " coins")

-- 按名称查找 Settings.Pets
local petInfo = {}
for _, info in Settings.Pets do
	petInfo[info.Name] = info
end

-- 一只宠物：玩家的 Pets 文件夹中的一个 StringValue，保存着宠物的名称，
-- 稀有度和力量则保存在属性中
local function givePet(player, name, equipped)
	local info = petInfo[name]
	local pet = Instance.new("StringValue")
	pet.Name = "Pet"
	pet.Value = name
	pet:SetAttribute("Rarity", info.Rarity)
	pet:SetAttribute("Power", info.Power)
	pet:SetAttribute("Equipped", equipped)
	pet.Parent = player.Pets
	return pet
end

-- 玩家放出了多少只宠物
local function equippedCount(player)
	local count = 0
	for _, pet in player.Pets:GetChildren() do
		if pet:GetAttribute("Equipped") then
			count += 1
		end
	end
	return count
end

-- 玩家的宠物为每次击打增加多少伤害
local function petPower(player)
	local power = 0
	for _, pet in player.Pets:GetChildren() do
		if pet:GetAttribute("Equipped") then
			power += pet:GetAttribute("Power")
		end
	end
	return power
end

-- 每个玩家的排行榜上都有 Coins
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player

	local coins = Instance.new("IntValue")
	coins.Name = "Coins"
	coins.Parent = leaderstats

	-- 他们拥有的宠物
	local pets = Instance.new("Folder")
	pets.Name = "Pets"
	pets.Parent = player
end)

-- 位置上的金币堆：ServerStorage.CoinPile 的副本，其生命值
-- 和值都保存在属性中
local function spawnPile(spot)
	local pile = ServerStorage.CoinPile:Clone()
	pile.Position = spot.Position
	pile:SetAttribute("MaxHealth", Settings.PileHealth)
	pile:SetAttribute("Health", Settings.PileHealth)
	pile:SetAttribute("Value", Settings.PileValue)
	pile.HealthGui.Label.Text = pile:GetAttribute("Health") .. "/" .. pile:GetAttribute("MaxHealth")
	pileSpot[pile] = spot
	pile.Parent = piles
	return pile
end

-- 每次击打会使金币堆的生命值减少 1，再加上玩家宠物的力量；
-- 生命值降到 0 时，金币堆会碎掉，并按其值发放金币
local function hitPile(player, pile)
	local health = pile:GetAttribute("Health") - (1 + petPower(player))
	if health > 0 then
		pile:SetAttribute("Health", health)
		pile.HealthGui.Label.Text = health .. "/" .. pile:GetAttribute("MaxHealth")
		return
	end
	player.leaderstats.Coins.Value += pile:GetAttribute("Value")
	local spot = pileSpot[pile]
	pileSpot[pile] = nil
	pile:Destroy()
	-- 几秒后，在同一位置生成一个新的金币堆
	task.delay(Settings.RespawnTime, spawnPile, spot)
end

-- 在 Meadow 的每个生成点放一个金币堆
for _, spot in workspace.Zones.Meadow.Spawns:GetChildren() do
	spawnPile(spot)
end

-- 客户端请求击打金币堆。绝不能信任客户端：任何人都能触发
-- 这个远程事件，传入任何内容，在任何地方以任意速度触发。
remotes.Hit.OnServerEvent:Connect(function(player, pile)
	-- 确认是真实的金币堆
	if typeof(pile) ~= "Instance" or pile.Parent ~= piles then
		return
	end
	-- 在可触及范围内
	local character = player.Character
	local root = character and character:FindFirstChild("HumanoidRootPart")
	if not root or (root.Position - pile.Position).Magnitude > Settings.Reach then
		return
	end
	-- 不能击打得太快
	local now = time()
	if lastHit[player] and now - lastHit[player] < Settings.HitCooldown then
		return
	end
	lastHit[player] = now
	hitPile(player, pile)
end)

-- 按权重随机抽取：每只宠物的 Chance（总计 100）决定它所占的份额
local function rollPet()
	local roll = math.random() * 100
	for _, info in Settings.Pets do
		roll -= info.Chance
		if roll <= 0 then
			return info.Name
		end
	end
	return Settings.Pets[1].Name
end

-- 孵化：通过蛋的交互提示触发，用金币支付
workspace.Egg.ProximityPrompt.Triggered:Connect(function(player)
	local coins = player.leaderstats.Coins
	if coins.Value < Settings.EggPrice then
		return
	end
	coins.Value -= Settings.EggPrice
	local name = rollPet()
	-- 如果还有空位，就立即让宠物出场
	local pet = givePet(player, name, equippedCount(player) < Settings.MaxEquipped)
	print(player.Name .. " hatched a " .. name)
end)

-- 出场的宠物会跟随主人：每只宠物在游戏世界中都有一个部件，保持
-- 每一帧都排成一排，跟在玩家身后
local petModels = {} -- 每只宠物 -> 它在游戏世界中的部件
RunService.Heartbeat:Connect(function()
	for _, player in Players:GetPlayers() do
		local root = player.Character and player.Character:FindFirstChild("HumanoidRootPart")
		local pets = player:FindFirstChild("Pets")
		local slot = 0
		for _, pet in pets and pets:GetChildren() or {} do
			local model = petModels[pet]
			if pet:GetAttribute("Equipped") and root then
				slot += 1
				if not model then
					model = ServerStorage.PetModels[pet.Value]:Clone()
					model.Parent = petParts
					petModels[pet] = model
				end
				model.CFrame = root.CFrame * CFrame.new((slot - 2) * 3, -1.5, 4)
			end
		end
	end
end)

-- 第 15 课：在这里添加最多装备三只宠物的代码