Save on Leave

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

local lobbySpawn = workspace.LobbySpawn

print("Rounds last " .. Settings.RoundLength .. " seconds")

-- Every player gets Wins and Streak on the leaderboard
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player

	local wins = Instance.new("IntValue")
	wins.Name = "Wins"
	wins.Parent = leaderstats

	local streak = Instance.new("IntValue")
	streak.Name = "Streak"
	streak.Parent = leaderstats
end)

-- Lesson 18: Save on Leave goes here

-- The status board in the lobby
local gui = Instance.new("SurfaceGui")
gui.Parent = workspace.StatusBoard

local status = Instance.new("TextLabel")
status.Name = "Status"
status.Size = UDim2.fromScale(1, 1)
status.BackgroundColor3 = Color3.fromRGB(25, 25, 35)
status.TextColor3 = Color3.fromRGB(255, 255, 255)
status.TextScaled = true
status.Text = "Welcome to Disaster Survival!"
status.Parent = gui

local function setStatus(text)
	status.Text = text
end

local function teleport(player, target)
	local character = player.Character
	if character then
		character:PivotTo(target.CFrame + Vector3.new(0, 4, 0))
	end
end

local function defeat(hit)
	local humanoid = hit.Parent:FindFirstChild("Humanoid")
	if humanoid then
		humanoid.Health = 0
	end
end

-- A floating "Survivor" tag over a player's head
local function tagSurvivor(character)
	local tag = Instance.new("BillboardGui")
	tag.Name = "SurvivorTag"
	tag.Size = UDim2.fromOffset(120, 30)
	tag.StudsOffset = Vector3.new(0, 2.5, 0)
	tag.Parent = character.Head

	local label = Instance.new("TextLabel")
	label.Size = UDim2.fromScale(1, 1)
	label.BackgroundTransparency = 1
	label.Text = "Survivor"
	label.TextColor3 = Color3.fromRGB(80, 255, 120)
	label.TextScaled = true
	label.Parent = tag
end

-- The disasters, by name
local Disasters = {}

function Disasters.Flood(map)
	local base = map.Base
	local water = Instance.new("Part")
	water.Name = "Water"
	water.Anchored = true
	water.CanCollide = false
	water.Transparency = 0.3
	water.Color = Color3.fromRGB(40, 120, 255)
	water.Size = Vector3.new(base.Size.X + 10, 1, base.Size.Z + 10)
	water.Position = base.Position - Vector3.new(0, 2, 0)
	water.Parent = map
	water.Touched:Connect(defeat)

	local rise = TweenInfo.new(Settings.RoundLength * 0.8, Enum.EasingStyle.Linear)
	TweenService:Create(water, rise, { Position = water.Position + Vector3.new(0, 8, 0) }):Play()
end

function Disasters.Meteors(map)
	local base = map.Base
	task.spawn(function()
		while map.Parent do
			local meteor = Instance.new("Part")
			meteor.Name = "Meteor"
			meteor.Shape = Enum.PartType.Ball
			meteor.Size = Vector3.new(3, 3, 3)
			meteor.Color = Color3.fromRGB(255, 120, 30)
			meteor.Material = Enum.Material.Neon
			local x = base.Position.X + math.random(-15, 15)
			local z = base.Position.Z + math.random(-15, 15)
			meteor.Position = Vector3.new(x, 40, z)
			meteor.Parent = map
			meteor.Touched:Connect(defeat)
			Debris:AddItem(meteor, 4)
			task.wait(0.5)
		end
	end)
end

function Disasters.Shrink(map)
	local base = map.Base
	local shrink = TweenInfo.new(Settings.RoundLength * 0.7, Enum.EasingStyle.Linear)
	TweenService:Create(base, shrink, { Size = Vector3.new(6, base.Size.Y, 6) }):Play()
end

local function pickDisaster()
	-- Settings.Disaster plays one disaster, if the game has it
	if Settings.Disaster and Disasters[Settings.Disaster] then
		return Settings.Disaster
	end
	local names = {}
	for name in Disasters do
		table.insert(names, name)
	end
	table.sort(names)
	return names[math.random(1, #names)]
end

local function pickMap()
	local maps = ServerStorage.Maps
	if Settings.Map then
		return maps:FindFirstChild(Settings.Map)
	end
	local all = maps:GetChildren()
	return all[math.random(1, #all)]
end

-- The round loop
while true do
	for seconds = Settings.Intermission, 1, -1 do
		setStatus("Intermission: " .. seconds)
		task.wait(1)
	end

	local template = pickMap()
	local map = template:Clone()
	map.Name = "Map"
	map.Parent = workspace
	setStatus("Map: " .. template.Name)

	local survivors = {}
	for _, player in Players:GetPlayers() do
		local character = player.Character
		if character and character.Humanoid.Health > 0 then
			teleport(player, map.Spawn)
			tagSurvivor(character)
			survivors[player] = true
			character.Humanoid.Died:Connect(function()
				survivors[player] = nil
				player.leaderstats.Streak.Value = 0
			end)
		end
	end
	task.wait(2)

	local disaster = pickDisaster()
	Disasters[disaster](map)
	for seconds = Settings.RoundLength, 1, -1 do
		setStatus(disaster .. "! Time left: " .. seconds)
		task.wait(1)
	end

	local names = {}
	for player in survivors do
		player.leaderstats.Wins.Value += 1
		player.leaderstats.Streak.Value += 1
		local tag = player.Character and player.Character.Head:FindFirstChild("SurvivorTag")
		if tag then
			tag:Destroy()
		end
		teleport(player, lobbySpawn)
		table.insert(names, player.Name)
	end
	map:Destroy()
	if #names > 0 then
		setStatus("Winners: " .. table.concat(names, ", "))
	else
		setStatus("Nobody survived!")
	end
	task.wait(3)
end