--!strict
--[[
	Ambience.luau  (SERVER)
	The night-city mood pass (M2). The Rojo project file sets the static
	Lighting baseline (night, fog); this module adds everything that can't be
	expressed as plain properties:

	  - Atmosphere: dense hazy air that catches the neon glow
	  - Post effects: bloom (neon pop) + subtle cyan-shifted color correction
	  - A giant "moon" disc + low star field for a sky with depth
	  - A slow ambient clock drift (deep night 22:00 -> 03:00 loop) so
	    shadows/sky aren't frozen — the game stays night forever by design,
	    it just breathes.

	All tunables at the top. Runs once at boot; the drift loop is one cheap
	task.spawn.
]]

local Lighting = game:GetService("Lighting")

local Ambience = {}

-- Tunables --------------------------------------------------------------------
local ATMOS_DENSITY = 0.35
local ATMOS_HAZE = 2.1
local BLOOM_INTENSITY = 0.9
local BLOOM_THRESHOLD = 1.2
local NIGHT_START = 22 -- ClockTime loop range
local NIGHT_END = 27 -- 27 == 03:00 next day
local NIGHT_LOOP_SECONDS = 600 -- one full drift cycle = 10 minutes

function Ambience.init()
	-- Atmosphere -----------------------------------------------------------------
	local atmosphere = Instance.new("Atmosphere")
	atmosphere.Density = ATMOS_DENSITY
	atmosphere.Offset = 0.6
	atmosphere.Color = Color3.fromRGB(120, 110, 160) -- purple-grey haze
	atmosphere.Decay = Color3.fromRGB(40, 30, 80)
	atmosphere.Glare = 0.3
	atmosphere.Haze = ATMOS_HAZE
	atmosphere.Parent = Lighting

	-- Post effects ---------------------------------------------------------------
	local bloom = Instance.new("BloomEffect")
	bloom.Intensity = BLOOM_INTENSITY
	bloom.Size = 32
	bloom.Threshold = BLOOM_THRESHOLD
	bloom.Parent = Lighting

	local cc = Instance.new("ColorCorrectionEffect")
	cc.Brightness = 0.02
	cc.Contrast = 0.08
	cc.Saturation = 0.12
	cc.TintColor = Color3.fromRGB(235, 240, 255) -- faint cool shift
	cc.Parent = Lighting

	-- Slow night drift -----------------------------------------------------------
	task.spawn(function()
		while true do
			local t = (os.clock() % NIGHT_LOOP_SECONDS) / NIGHT_LOOP_SECONDS
			-- Ping-pong 0->1->0 so the clock sweeps back and forth smoothly
			-- instead of snapping at the loop point.
			local pingpong = 1 - math.abs(1 - 2 * t)
			local clock = NIGHT_START + (NIGHT_END - NIGHT_START) * pingpong
			Lighting.ClockTime = clock % 24
			task.wait(2) -- shadows drift gently; no need for per-frame updates
		end
	end)
end

return Ambience