extends Node
class_name StopNGoManager

# StopNGoManager - Handles phase transitions, missions, and movement penalties

signal phase_changed(new_phase: String, remaining_time: float)
signal mission_status_updated(player_id: int, completed: bool)
signal player_penalized(player_id: int)

enum Phase {GO, STOP}

# Dynamic Safe Zone
const SAFE_ZONE_PRE_TIME: float = 5.0 # Seconds before STOP to spawn safe zone
const SAFE_ZONE_RADIUS: int = 2 # 5x5 area (radius 2 from center)
var safe_zone_centers: Array[Vector2i] = []
var safe_zone_spawned: bool = false

# Power-Up Tile Spawning
const POWERUP_TILES = [11, 14] # Speed, Ghost (Freeze and Wall excluded in this mode)
const POWERUP_SPAWN_COUNT: int = 5 # Number of power-up tiles to spawn
var powerups_spawned: bool = false
var stop_phase_occurred: bool = false

var safe_zone_wall_scene = preload("res://scenes/safe_zone_wall.tscn")

const PERMANENT_POWERUP_LOCATIONS: Array[Vector2i] = [
	Vector2i(4, 1),   # Power up 1
	Vector2i(3, 9),   # Power up 2
	Vector2i(9, 6),   # Power up 3
	Vector2i(16, 2),  # Power up 4
	Vector2i(18, 8)   # Power up 5
]

var current_phase: Phase = Phase.GO
var phase_timer: float = 15.0 # Initialized dynamically later
var is_active: bool = false

var player_missions: Dictionary = {} # player_id -> {target_tile: int, required: int, current: int}
var finish_line_x: int = 22 # Right side of the map for win condition

# Tile IDs
const TILE_WALKABLE = 0
const TILE_START = 3 # Start Line
const TILE_FINISH = 3 # Finish Line
const TILE_SAFE = 2 # Green Safe Zone
const TILE_OBSTACLE = 4 # Wall
const TILE_LIGHTNING_STONE = 15 # Ancient Rock with Lightning Symbol

var hud_layer: CanvasLayer
var mission_label: Label
var red_tint_overlay: ColorRect

# Traffic Light / StopTimer Visuals
var stop_timer_node: PanelContainer
var stop_segments: Array[Panel] = []
var lit_style: StyleBoxFlat
var dim_style: StyleBoxFlat
var red_style: StyleBoxFlat

func _ready():
	set_process(false)
	_setup_hud()

func _setup_hud():
	hud_layer = CanvasLayer.new()
	hud_layer.layer = 5 # Ensure it's above normal UI but below Pause Menu (10)
	hud_layer.visible = false
	add_child(hud_layer)
	
	# Full-screen red tint overlay (below everything else in this layer, but above game)
	red_tint_overlay = ColorRect.new()
	red_tint_overlay.color = Color(1.0, 0.0, 0.0, 0.25) # Transparent red
	red_tint_overlay.set_anchors_preset(Control.PRESET_FULL_RECT) # Cover whole screen
	red_tint_overlay.visible = false # Hidden initially
	hud_layer.add_child(red_tint_overlay)
	
	# New container for bottom-mid label
	var bottom_container = CenterContainer.new()
	bottom_container.set_anchors_preset(Control.PRESET_CENTER_BOTTOM)
	bottom_container.grow_horizontal = Control.GROW_DIRECTION_BOTH
	bottom_container.grow_vertical = Control.GROW_DIRECTION_BEGIN
	bottom_container.offset_bottom = -50
	hud_layer.add_child(bottom_container)
	
	var custom_font = load("res://assets/fonts/Nougat-ExtraBlack.ttf")
	
	mission_label = Label.new()
	mission_label.text = "MISSION: Collect Goals"
	mission_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	if custom_font: mission_label.add_theme_font_override("font", custom_font)
	mission_label.add_theme_font_size_override("font_size", 28) # Slightly larger since it's centered
	mission_label.add_theme_color_override("font_outline_color", Color.BLACK)
	mission_label.add_theme_constant_override("outline_size", 8)
	bottom_container.add_child(mission_label)

func _process(delta):
	if not is_active:
		return
		
	# Decrement timer locally for all peers (smoother HUD than waiting for RPC)
	phase_timer -= delta
		
	if multiplayer.is_server():
		if phase_timer <= 0:
			if current_phase == Phase.GO:
				_start_phase(Phase.STOP)
			else:
				_start_phase(Phase.GO)
	
	# Update HUD locally
	_update_hud_visuals()

func _on_goal_count_updated(_peer_id: int, _count: int):
	# Refresh visuals whenever points change
	_update_hud_visuals()

var _has_notified_mission_complete: bool = false

func _update_hud_visuals():
	# Toggle Red Screen Tint
	if red_tint_overlay:
		red_tint_overlay.visible = (current_phase == Phase.STOP)
	
	var my_id = multiplayer.get_unique_id()
	if mission_label:
		var main = get_node_or_null("/root/Main")
		var goals_cycle_manager = main.get_node_or_null("GoalsCycleManager") if main else null
		
		# Get count from GoalsCycleManager (Source of truth for PlayerBoardLabel)
		var completed_count = goals_cycle_manager.player_goal_counts.get(my_id, 0) if goals_cycle_manager else 0
		var required_goals = LobbyManager.sng_required_goals
		
		mission_label.text = "GOALS (%d/%d)" % [completed_count, required_goals]
		
		if completed_count >= required_goals:
			mission_label.text = "ALL GOALS COMPLETE!\nREACH THE FINISH!"
			mission_label.add_theme_color_override("font_color", Color.GOLD)
			
			# Notify player once
			if my_id == multiplayer.get_unique_id() and not _has_notified_mission_complete:
				_has_notified_mission_complete = true
				var player_node = main.get_node_or_null(str(my_id))
				if player_node:
					NotificationManager.send_message(player_node, "ALL GOALS COMPLETE!", NotificationManager.MessageType.GOAL)
		else:
			mission_label.add_theme_color_override("font_color", Color.WHITE)
			_has_notified_mission_complete = false
			
	# Update StopTimer (Traffic Light)
	_update_stop_timer_visuals()

func _update_stop_timer_visuals():
	if not stop_timer_node:
		# Try to find it once
		var main = get_node_or_null("/root/Main")
		if main:
			stop_timer_node = main.get_node_or_null("StopTimer")
			if stop_timer_node:
				var hbox = stop_timer_node.get_node_or_null("HBox")
				if hbox:
					stop_segments.clear()
					for i in range(3):
						var seg = hbox.get_node_or_null("Segment%d" % i)
						if seg: stop_segments.append(seg)
				
				# Prepare styles
				lit_style = StyleBoxFlat.new()
				lit_style.bg_color = Color.YELLOW
				lit_style.border_width_left = 2
				lit_style.border_width_top = 2
				lit_style.border_width_right = 2
				lit_style.border_width_bottom = 2
				lit_style.border_color = Color(1.0, 1.0, 1.0, 0.5)
				
				dim_style = StyleBoxFlat.new()
				dim_style.bg_color = Color(0.1, 0.1, 0.1, 0.8) # Dark dim
				
				red_style = StyleBoxFlat.new()
				red_style.bg_color = Color.RED
				red_style.border_width_left = 2
				red_style.border_width_top = 2
				red_style.border_width_right = 2
				red_style.border_width_bottom = 2
				red_style.border_color = Color(1.0, 0.5, 0.5, 0.5)
	
	if not stop_timer_node: return

	# ALWAYS VISIBLE in Stop n Go mode
	stop_timer_node.visible = true

	if current_phase == Phase.GO:
		# GO Phase: All dim unless in last 3 seconds
		for i in range(stop_segments.size()):
			var threshold = 3.0 - i
			if phase_timer <= threshold:
				stop_segments[i].add_theme_stylebox_override("panel", lit_style)
			else:
				stop_segments[i].add_theme_stylebox_override("panel", dim_style)
	else:
		# STOP Phase: All Red
		for seg in stop_segments:
			seg.add_theme_stylebox_override("panel", red_style)

func activate_client_side():
	is_active = true
	if hud_layer:
		hud_layer.visible = true
	
	# Connect to GoalsCycleManager for immediate HUD updates
	var main = get_node_or_null("/root/Main")
	if main:
		var gcm = main.get_node_or_null("GoalsCycleManager")
		if gcm and not gcm.goal_count_updated.is_connected(_on_goal_count_updated):
			gcm.goal_count_updated.connect(_on_goal_count_updated)
			
	set_process(true)

func start_game_mode():
	# This should primarily be called by the Server
	# Clients get activated via RPCs (sync_phase, etc)
	if multiplayer.is_server():
		activate_client_side() # Server also needs local processing
		# _setup_arena() # REMOVED: Already explicitly called in main.gd _setup_host_game to prepare floor before spawns!
		_assign_missions()
		_start_phase(Phase.GO)
	else:
		# Clients just wait for updates, but can enable HUD if needed
		# activate_client_side() can be called when first sync arrives
		pass

func _start_phase(phase: Phase):
	current_phase = phase
	phase_timer = float(LobbyManager.sng_go_duration) if phase == Phase.GO else float(LobbyManager.sng_stop_duration)
	
	var phase_name = "GO" if phase == Phase.GO else "STOP"
	if can_rpc():
		rpc("sync_phase", phase_name, phase_timer)
		
		if phase == Phase.STOP:
			stop_phase_occurred = true
			# --- STATIC SAFE ZONE: Penalize players outside the zone ---
			var all_players = get_tree().get_nodes_in_group("Players")
			for p in all_players:
				if not _is_in_safe_zone(p.current_position):
					_scatter_player_tiles(p)
			
			# Refresh power-ups every STOP phase
			_spawn_powerup_tiles()
		
		# If GO phase starts, clear all STOP phase freezes
		if phase == Phase.GO:
			var all_players = get_tree().get_nodes_in_group("Players")
			for p in all_players:
				if p.has_method("sync_stop_freeze"):
					p.rpc("sync_stop_freeze", false)
					
	emit_signal("phase_changed", phase_name, phase_timer)

func can_rpc() -> bool:
	if not multiplayer.has_multiplayer_peer() or multiplayer.multiplayer_peer.get_connection_status() != MultiplayerPeer.CONNECTION_CONNECTED:
		return false
	return true

@rpc("authority", "call_local", "reliable")
func sync_phase(phase_name: String, duration: float):
	if not is_active:
		activate_client_side()
	current_phase = Phase.GO if phase_name == "GO" else Phase.STOP
	phase_timer = duration

func _setup_arena():
	var gridmap = get_parent().get_node_or_null("EnhancedGridMap")
	if not gridmap:
		gridmap = get_node_or_null("/root/Main/EnhancedGridMap")
	if not gridmap: return
	
	print("[StopNGo] Setting up 22x10 Arena with Randomized Obstacles...")
	
	# Explicitly sync dimensions and clear grid on all clients
	if can_rpc():
		rpc("sync_arena_setup")
			
	# Apply locally for Server (RPC is call_remote)
	_apply_arena_setup()

@rpc("authority", "call_remote", "reliable")
func sync_arena_setup():
	print("[StopNGo] Client: Syncing Arena Setup (23x12)...")
	_apply_arena_setup()
	
func _apply_arena_setup():
	# Shared logic for resizing and clearing
	var gridmap = get_parent().get_node_or_null("EnhancedGridMap")
	if not gridmap:
		# Fallback just in case
		gridmap = get_node_or_null("/root/Main/EnhancedGridMap")
	if not gridmap: return

	# Set Size for Stop n Go explicitly, bypassing setters that wipe the map
	gridmap.set("columns", 23)
	gridmap.set("rows", 12)
	
	# Clear existing items on all layers
	gridmap.clear()

	# Dynamic Safe Zone: No static safe columns anymore
	# Safe zone spawns randomly during gameplay

	var non_walkable_coords = [
		Vector2i(0,0), Vector2i(1,0), Vector2i(2,0), Vector2i(3,0), Vector2i(4,0), Vector2i(5,0), Vector2i(6,0), Vector2i(7,0), Vector2i(8,0), Vector2i(9,0), Vector2i(10,0), Vector2i(13,0), Vector2i(19,0), Vector2i(20,0), Vector2i(21,0), Vector2i(22,0),
		Vector2i(0,1), Vector2i(1,1), Vector2i(2,1), Vector2i(3,1), Vector2i(6,1),
		Vector2i(0,2), Vector2i(1,2), Vector2i(2,2), Vector2i(3,2),
		Vector2i(17,9), Vector2i(18,9), Vector2i(19,9), Vector2i(20,9), Vector2i(21,9), Vector2i(22,9),
		Vector2i(11,10), Vector2i(12,10), Vector2i(13,10), Vector2i(15,10), Vector2i(16,10), Vector2i(17,10), Vector2i(18,10), Vector2i(19,10), Vector2i(20,10), Vector2i(21,10), Vector2i(22,10),
		Vector2i(0,11), Vector2i(4,11), Vector2i(5,11), Vector2i(6,11), Vector2i(9,11), Vector2i(10,11), Vector2i(11,11), Vector2i(12,11), Vector2i(13,11), Vector2i(14,11), Vector2i(15,11), Vector2i(16,11), Vector2i(17,11), Vector2i(18,11), Vector2i(19,11), Vector2i(20,11), Vector2i(21,11), Vector2i(22,11),
		# Fixed User Obstacles Below:
		Vector2i(2,8), # Cactus 1
		Vector2i(4,4), # Cactus 2
		Vector2i(12,6), # Cactus 3
		Vector2i(12,9), # Cactus 4
		Vector2i(5,9), Vector2i(5,10), # Wall rock 1
		Vector2i(10,1), Vector2i(10,2), Vector2i(11,1), # Wall rock 2
		Vector2i(17,6), # Wall rock 3
		Vector2i(7,4), Vector2i(7,5), # Tree 1
		Vector2i(10,4), # Tree 2
		Vector2i(13,3), Vector2i(14,3), Vector2i(14,4), # Tree 3
		Vector2i(20,4), Vector2i(20,5), # Tree 4
		Vector2i(9,8), # Statue 1
		Vector2i(17,3) # Statue 2
	]

	# Create bands based on X (Horizontal Progress)
	for x in range(gridmap.columns):
		for z in range(gridmap.rows):
			var current_pos = Vector2i(x, z)
			if current_pos in non_walkable_coords:
				gridmap.set_cell_item(Vector3i(x, 0, z), -1) # empty space / void
				gridmap.set_cell_item(Vector3i(x, 1, z), TILE_OBSTACLE) # wall block
				continue

			var tile_id = TILE_WALKABLE
			if x == 0:
				tile_id = TILE_START
			elif x == gridmap.columns - 1:
				tile_id = TILE_FINISH
			
			gridmap.set_cell_item(Vector3i(x, 0, z), tile_id)
			gridmap.set_cell_item(Vector3i(x, 1, z), -1)
			
	# Paint Static Safe Zones
	_paint_static_safe_zone(gridmap, 7, 11, 6, 9, -1, -1, 8, 8)
	_paint_static_safe_zone(gridmap, 15, 19, 1, 5, -1, 18, 2, 2)
			
	# Note: Specific obstacles removed as per user request to replace with random ones.
	# MISSION TILES: Moved to start_game_mode() to ensure they spawn AFTER walls.
	
	gridmap.update_grid_data()
	gridmap.initialize_astar()
	
func setup_mission_tiles():
	"""Public wrapper to trigger mission tile spawning before game start."""
	if multiplayer.is_server():
		_spawn_mission_tiles()

func spawn_initial_powerups():
	"""Public wrapper to spawn powerups before game start."""
	if multiplayer.is_server():
		_spawn_powerup_tiles()

func _spawn_mission_tiles():
	var gridmap = get_parent().get_node_or_null("EnhancedGridMap")
	if not gridmap:
		gridmap = get_node_or_null("/root/Main/EnhancedGridMap")
	if not gridmap: return
	
	# Forbidden Zones (Start, Finish) - No items here
	var forbidden_x = [0, gridmap.columns - 1]
	
	# Goal items: Heart(7), Diamond(8), Star(9), Coin(10)
	var goal_items = [7, 8, 9, 10]
	
	for x in range(gridmap.columns):
		if x in forbidden_x:
			continue # Clear zone
			
		for z in range(gridmap.rows):
			# Ensure we don't spawn on obstacles
			var base_tile = gridmap.get_cell_item(Vector3i(x, 0, z))
			var current_item = gridmap.get_cell_item(Vector3i(x, 1, z))
			
			# PROTECTED FLOOR CHECK: Don't spawn on walls, void, or static powerup pods
			if base_tile in [TILE_OBSTACLE, -1, TILE_LIGHTNING_STONE] or current_item == TILE_OBSTACLE:
				continue
				
			# Spawn tiles with 60% density
			if randf() > 0.6:
				gridmap.set_cell_item(Vector3i(x, 1, z), -1)
				continue
				
			var tile_type = goal_items[randi() % goal_items.size()]
			gridmap.set_cell_item(Vector3i(x, 1, z), tile_type)
			
			# Sync to clients
			var main = get_node("/root/Main")
			if main:
				main.rpc("sync_grid_item", x, 1, z, tile_type)

func _assign_missions():
	# NO-OP: Missions are now achievement-based (Complete 3 Goals)
	# which is tracked natively by GoalsCycleManager.
	pass

@rpc("authority", "call_local", "reliable")
func sync_missions(missions: Dictionary):
	player_missions = missions

func check_movement_violation(player_id: int, from: Vector2i, to: Vector2i) -> bool:
	"""Check if movement is illegal (during STOP phase and not in safe zone)."""
	if current_phase == Phase.STOP:
		# Use dynamic safe zone position check instead of static tile check
		if not _is_in_safe_zone(from):
			var gridmap = get_parent().get_node_or_null("EnhancedGridMap")
			if not gridmap:
				gridmap = get_node_or_null("/root/Main/EnhancedGridMap")
			if gridmap:
				var tile_from = gridmap.get_cell_item(Vector3i(from.x, 0, from.y))
				if tile_from != TILE_START and tile_from != TILE_FINISH:
					_penalize_player(player_id)
					return true
	return false

func _penalize_player(player_id: int):
	if not multiplayer.is_server(): return
	
	var main = get_node("/root/Main")
	if not main: return
	
	var player_node = main.get_node_or_null(str(player_id))
	if player_node:
		# We now use the 'on_stop_phase_violation' RPC which scatters tiles around the player
		# like they got attacked, instead of just dropping them in one pile.
		if can_rpc():
			player_node.rpc("on_stop_phase_violation")
		
		# Notification is also handled inside on_stop_phase_violation on the player node
		emit_signal("player_penalized", player_id)

func update_mission_progress(_player_id: int, _tile_id: int):
	# Redundant in Board-based mode, but kept for compatibility.
	# The board is synced separately via sync_playerboard in playerboard_manager.gd.
	pass

@rpc("any_peer", "call_local", "reliable")
func sync_mission_progress(_player_id: int, _mission_index: int, _current: int):
	# Deprecated
	pass

func is_mission_complete(player_id: int) -> bool:
	var main = get_node_or_null("/root/Main")
	if not main: return false
	
	var goals_cycle_manager = main.get_node_or_null("GoalsCycleManager")
	if not goals_cycle_manager: return false
	
	var completed_count = goals_cycle_manager.player_goal_counts.get(player_id, 0)
	return completed_count >= LobbyManager.sng_required_goals

func check_win_condition(player_id: int, position: Vector2i) -> bool:
	# 1. Must reach the finish line (Column 21)
	if position.x < finish_line_x:
		return false
		
	# 2. Must have enough Goal Completions
	if is_mission_complete(player_id):
		print("[StopNGo] Player %d REACHED FINISH with goals complete!" % player_id)
		return true
	else:
		# Inform the player locally if they reach the end without goals
		var main = get_node_or_null("/root/Main")
		var player_node = main.get_node_or_null(str(player_id)) if main else null
		if player_node:
			NotificationManager.send_message(player_node, "Incomplete! Achieve %d goals to win!" % LobbyManager.sng_required_goals, NotificationManager.MessageType.WARNING)
		
		print("[StopNGo] Player %d reached finish but goals incomplete." % player_id)
		return false

# =============================================================================
# Static Safe Zone
# =============================================================================

func _paint_static_safe_zone(gridmap: Node, min_x: int, max_x: int, min_z: int, max_z: int, north_door_x: int = -1, south_door_x: int = -1, west_door_z: int = -1, east_door_z: int = -1):
	# Paint safe floor
	for x in range(min_x, max_x + 1):
		for z in range(min_z, max_z + 1):
			gridmap.set_cell_item(Vector3i(x, 0, z), TILE_SAFE)
			
	# Get center opening for horizontal walls
	var center_n_x = north_door_x if north_door_x != -1 else int(float(min_x + max_x) / 2.0)
	var center_s_x = south_door_x if south_door_x != -1 else int(float(min_x + max_x) / 2.0)
	
	# Instantiate Top and Bottom horizontal walls
	for x in range(min_x, max_x + 1):
		if x != center_n_x:
			_instantiate_safe_zone_wall(Vector3(x + 0.5, 0.0, min_z), 0)       # Bottom/North
		if x != center_s_x:
			_instantiate_safe_zone_wall(Vector3(x + 0.5, 0.0, max_z + 1), 0)   # Top/South
		
	# Get center opening for vertical walls
	var center_w_z = west_door_z if west_door_z != -1 else int(float(min_z + max_z) / 2.0)
	var center_e_z = east_door_z if east_door_z != -1 else int(float(min_z + max_z) / 2.0)
	
	for z in range(min_z, max_z + 1):
		if z != center_w_z:
			_instantiate_safe_zone_wall(Vector3(min_x, 0.0, z + 0.5), 90)       # Left/West
		if z != center_e_z:
			_instantiate_safe_zone_wall(Vector3(max_x + 1, 0.0, z + 0.5), 90)   # Right/East

func _is_in_safe_zone(pos: Vector2i) -> bool:
	"""Check if a position is within ANY of the static safe zones."""
	# Safe zone 1: [7,6] - [11,9]
	if pos.x >= 7 and pos.x <= 11 and pos.y >= 6 and pos.y <= 9: return true
	# Safe zone 2: [15,1] - [19,5]
	if pos.x >= 15 and pos.x <= 19 and pos.y >= 1 and pos.y <= 5: return true
	return false

func _scatter_player_tiles(player_node: Node):
	"""Server: Take all tiles from player's playerboard and scatter them onto nearby grid cells."""
	if not multiplayer.is_server(): return
	
	var main = get_node_or_null("/root/Main")
	if not main: return
	
	var gridmap = main.get_node_or_null("EnhancedGridMap")
	if not gridmap: return
	
	var peer_id = player_node.name.to_int()
	var playerboard = player_node.playerboard
	var tiles_to_scatter: Array[int] = []
	
	# Collect all non-empty tiles from playerboard
	for i in range(playerboard.size()):
		if playerboard[i] != -1:
			tiles_to_scatter.append(playerboard[i])
			playerboard[i] = -1
	
	if tiles_to_scatter.is_empty():
		return # Nothing to scatter
	
	# Find valid nearby positions to drop tiles (within radius 3 of player)
	var center = player_node.current_position
	var valid_drop_positions: Array[Vector2i] = []
	for dx in range(-3, 4):
		for dz in range(-3, 4):
			var pos = Vector2i(center.x + dx, center.y + dz)
			# Bounds check
			if pos.x < 0 or pos.x >= gridmap.columns or pos.y < 0 or pos.y >= gridmap.rows:
				continue
			# Check floor is walkable (not void, not obstacle, not static powerup spawn)
			var floor_tile = gridmap.get_cell_item(Vector3i(pos.x, 0, pos.y))
			if floor_tile == -1 or floor_tile == TILE_OBSTACLE or floor_tile == TILE_LIGHTNING_STONE:
				continue
			# Check floor 1 is empty (no existing item)
			var existing_item = gridmap.get_cell_item(Vector3i(pos.x, 1, pos.y))
			if existing_item != -1:
				continue
			valid_drop_positions.append(pos)
	
	# Scatter tiles onto valid positions
	var rng = RandomNumberGenerator.new()
	rng.randomize()
	
	for tile in tiles_to_scatter:
		if valid_drop_positions.is_empty():
			break # No more space
		
		var idx = rng.randi() % valid_drop_positions.size()
		var drop_pos = valid_drop_positions[idx]
		valid_drop_positions.remove_at(idx)
		
		# Place tile on grid Floor 1
		gridmap.set_cell_item(Vector3i(drop_pos.x, 1, drop_pos.y), tile)
		# Sync to all clients
		main.rpc("sync_grid_item", drop_pos.x, 1, drop_pos.y, tile)
	
	# Sync cleared playerboard to all clients
	main.rpc("sync_playerboard", peer_id, playerboard)
	
	# Notify the player
	SfxManager.rpc("play_rpc", "tile_scatter")
	NotificationManager.send_message(player_node, "Not in Safe Zone! Tiles scattered!", NotificationManager.MessageType.WARNING)
	
	# Screen shake
	if player_node.has_method("trigger_screen_shake") and can_rpc():
		player_node.rpc("trigger_screen_shake", "heavy")
	
	print("[StopNGo] Scattered %d tiles from Player %d" % [tiles_to_scatter.size(), peer_id])

# Removed dynamic sync methods.

func _instantiate_safe_zone_wall(pos: Vector3, rotation_deg: float):
	if not safe_zone_wall_scene: return
	
	var wall = safe_zone_wall_scene.instantiate()
	add_child(wall)
	wall.add_to_group("SafeZoneWalls")
	wall.position = pos
	wall.rotation_degrees.y = rotation_deg

# =============================================================================
# Power-Up Tile Spawning (Speed & Ghost)
# =============================================================================

func _spawn_powerup_tiles():
	"""Server: Spawn 5 permanent power-up tiles at fixed positions."""
	if not multiplayer.is_server(): return
	
	var main = get_node_or_null("/root/Main")
	if not main: return
	
	var gridmap = main.get_node_or_null("EnhancedGridMap")
	if not gridmap: return
	
	print("[StopNGo] Spawning/Refreshing 5 static power-up tiles...")
	
	for i in range(PERMANENT_POWERUP_LOCATIONS.size()):
		var pos = PERMANENT_POWERUP_LOCATIONS[i]
		
		# Set Floor 0 beneath power-up to ID 15 (Ancient Lightning Stone)
		gridmap.set_cell_item(Vector3i(pos.x, 0, pos.y), TILE_LIGHTNING_STONE)
		
		# Select a random power-up type (User Request: ensure all types can spawn)
		var tile_id = POWERUP_TILES.pick_random()
		
		# Place on Floor 1
		gridmap.set_cell_item(Vector3i(pos.x, 1, pos.y), tile_id)
		
		# Sync both floor and tile to all clients and host
		if can_rpc():
			main.rpc("sync_grid_item", pos.x, 0, pos.y, TILE_LIGHTNING_STONE) # Sync floor change (Stone on)
			main.rpc("sync_grid_item", pos.x, 1, pos.y, tile_id) # Sync power-up
	
	powerups_spawned = true
	print("[StopNGo] Static power-up refresh completed.")