--// SERVICES
local SoundService = game:GetService("SoundService")

--// CHILL MUSIC PLAYLIST (Roblox Sound IDs)
local chillPlaylist = {
    "rbxassetid://1837879082",  -- Chill Lofi 1
    "rbxassetid://1839841807",  -- Chill Lofi 2
    "rbxassetid://9043887091",  -- Ambient Chill
    "rbxassetid://9042539129",  -- Relaxing Beats
    "rbxassetid://1845341258",  -- Smooth Vibe
    "rbxassetid://1848354536"   -- Soft Aesthetic
}

-- Create a dedicated Sound instance
local musicSound = Instance.new("Sound")
musicSound.Name = "BackgroundChillMusic"
musicSound.Volume = 0.5
musicSound.Looped = false
musicSound.Parent = SoundService

local remainingPlaylist = {}

-- Function to shuffle table randomly (Fisher-Yates Shuffle)
local function shufflePlaylist()
    remainingPlaylist = {}
    for _, soundId in ipairs(chillPlaylist) do
        table.insert(remainingPlaylist, soundId)
    end
    
    for i = #remainingPlaylist, 2, -1 do
        local j = math.random(i)
        remainingPlaylist[i], remainingPlaylist[j] = remainingPlaylist[j], remainingPlaylist[i]
    end
    print("[Music Player] Playlist shuffled. " .. tostring(#remainingPlaylist) .. " tracks loaded.")
end

-- Function to play next unique song
local function playNextSong()
    -- Refill and shuffle if playlist is empty or all tracks played
    if #remainingPlaylist == 0 then
        shufflePlaylist()
    end
    
    -- Pick the top track and remove it from the pool to prevent repeats
    local nextTrack = table.remove(remainingPlaylist, 1)
    
    musicSound.SoundId = nextTrack
    musicSound:Play()
    print("[Music Player] Now playing: " .. nextTrack)
end

-- Play next track automatically when the current one ends
musicSound.Ended:Connect(playNextSong)

-- Start the music player
playNextSong()