extends Node

# MusicManager - Persistent singleton for handling background music across scenes
# Autoloaded as "MusicManager"

var music_player: AudioStreamPlayer
var current_track: String = ""

func _ready():
	process_mode = Node.PROCESS_MODE_ALWAYS # Ensure music plays during pause
	
	music_player = AudioStreamPlayer.new()
	music_player.name = "BackgroundMusicPlayer"
	music_player.bus = "Music"
	add_child(music_player)
	
	music_player.finished.connect(_on_music_finished)
	
	# Do NOT auto-start music here anymore as per user request
	# We will call start_music() from Main scene
	
	# Connect to LobbyManager signals if it exists
	if has_node("/root/LobbyManager"):
		get_node("/root/LobbyManager").game_mode_changed.connect(_on_game_mode_changed)

func _on_game_mode_changed(_mode: String):
	start_music()

func start_music():
	var current_scene = get_tree().current_scene
	if not current_scene:
		return
		
	if current_scene.name == "Lobby":
		play_track("res://assets/sounds/lobby.wav")
		return
		
	if current_scene.name != "Main" and current_scene.name != "LoadingScreen":
		print("[MusicManager] Not in Main or Lobby scene (currently in ", current_scene.name, "), skipping music.")
		return
		
	var game_mode = "Freemode"
	if has_node("/root/LobbyManager"):
		game_mode = get_node("/root/LobbyManager").game_mode
	
	var track_path = ""
	match game_mode:
		"Stop n Go":
			track_path = "res://assets/sounds/stop_n_go.wav"
		"Freemode", "Tekton Doors", _:
			track_path = "res://assets/sounds/level_bridge.wav"
	
	play_track(track_path)

func play_track(track_path: String):
	print("[MusicManager] Attempting to play track: ", track_path)
	
	if current_track == track_path and music_player.playing:
		print("[MusicManager] Already playing this track, skipping.")
		return
		
	if track_path == "":
		print("[MusicManager] Empty track path, stopping music.")
		music_player.stop()
		current_track = ""
		return

	if not ResourceLoader.exists(track_path):
		print("[MusicManager] ERROR: Track file not found: ", track_path)
		return

	var stream = load(track_path)
	if not stream:
		print("[MusicManager] ERROR: Failed to load stream from: ", track_path)
		return
		
	if stream is AudioStreamWAV:
		# Godot 4 looping settings for WAV
		stream.loop_mode = AudioStreamWAV.LOOP_FORWARD
		# Ensure loop end is at the very end of the file if not set
		if stream.loop_end == 0:
			stream.loop_end = stream.data.size() # This is a guess, but loop_mode 1 usually handles it
		print("[MusicManager] Configured WAV loop mode for: ", track_path)
	
	music_player.stream = stream
	
	# Verify bus exists before playing
	var bus_idx = AudioServer.get_bus_index("Music")
	if bus_idx == -1:
		print("[MusicManager] Warning: 'Music' bus not found, falling back to 'Master'")
		music_player.bus = "Master"
	else:
		music_player.bus = "Music"
		
	music_player.play()
	current_track = track_path
	print("[MusicManager] play() called successfully for: ", track_path, " on bus: ", music_player.bus)

func stop_music():
	music_player.stop()
	current_track = ""

func _on_music_finished():
	print("[MusicManager] Track finished: ", current_track)
	# Fallback looping if for some reason the native loop didn't work
	if current_track != "":
		print("[MusicManager] Restarting track (manual loop fallback): ", current_track)
		music_player.play()