extends Node


# SpecialTilesManager - Handles special effects triggered by holo tile pickups

# Holo tile indices (11-14) trigger special effects
const HOLO_TILES = [11, 12, 13, 14]

enum SpecialEffect {
	FASTER_SPEED, # ID 11
	AREA_FREEZE, # ID 12
	BLOCK_FLOOR, # ID 13
	INVISIBLE_MODE # ID 14
}

# Levels & Cooldowns
var powerup_levels: Dictionary = {} # EffectEnum -> int (1 to 8)
var powerup_cooldowns: Dictionary = {} # EffectEnum -> float (Time Remaining)
var active_buffs: Dictionary = {} # EffectEnum -> float (Duration Running)

# Cooldown Constants (Level 1 / Level 8)
const COOLDOWN_L1 = 15.0
const COOLDOWN_L8 = 5.0
const GLOBAL_COOLDOWN_MAX = 5.0
const FASTER_DURATION = 5.0
const FREEZE_SLOW_DURATION = 3.0

signal cooldown_updated(effect: int, time_left: float, max_time: float)
signal global_cooldown_updated(time_left: float, max_time: float)
signal powerup_unlocked(effect: int, level: int)


# New Helper functions for Targeting and Preview

func get_skill_affected_area(effect: int, center_pos: Vector2i) -> Array[Vector2i]:
	var area: Array[Vector2i] = []
	
	if effect == SpecialEffect.AREA_FREEZE:
		var radius = 2 # 5x5 area for freeze
		for x in range(-radius, radius + 1):
			for z in range(-radius, radius + 1):
				area.append(center_pos + Vector2i(x, z))
	elif effect == SpecialEffect.BLOCK_FLOOR:
		# Wall logic: project full line based on player orientation
		var last_dir = player.movement_manager.last_move_direction if (player and player.movement_manager) else Vector2i(0, 1)
		if last_dir.x != 0:
			# Vertical Wall
			for z in range(enhanced_gridmap.rows):
				area.append(Vector2i(center_pos.x, z))
		else:
			# Horizontal Wall
			for x in range(enhanced_gridmap.columns):
				area.append(Vector2i(x, center_pos.y))
					
	return area

func execute_targeted_effect(effect: int, target_pos: Vector2i):
	# Apply Cooldown NOW
	var level = powerup_levels.get(effect, 1)
	var cooldown_time = COOLDOWN_L1 + ((level - 1) * (COOLDOWN_L8 - COOLDOWN_L1) / 7.0)
	powerup_cooldowns[effect] = cooldown_time
	emit_signal("cooldown_updated", effect, cooldown_time, cooldown_time)
	
	print("[SpecialTiles] Executing Targeted Effect %s at %s" % [SpecialEffect.keys()[effect], target_pos])
	
	match effect:
		SpecialEffect.AREA_FREEZE:
			_execute_area_freeze(target_pos)
		SpecialEffect.BLOCK_FLOOR:
			_execute_block_floor(target_pos)
	
	# Animation / Shake
	if player.is_multiplayer_authority():
		player.rpc("trigger_screen_shake", "light")
		# Also reset action loop? (ONLY for human players)

# Random shape patterns for 3x3 area (relative offsets from center)

const PATTERNS = {
	"T": [Vector2i(0, -1), Vector2i(-1, 0), Vector2i(0, 0), Vector2i(1, 0)],
	"L": [Vector2i(0, -1), Vector2i(0, 0), Vector2i(0, 1), Vector2i(1, 1)],
	"I_H": [Vector2i(-1, 0), Vector2i(0, 0), Vector2i(1, 0)],
	"I_V": [Vector2i(0, -1), Vector2i(0, 0), Vector2i(0, 1)],
	"PLUS": [Vector2i(0, -1), Vector2i(-1, 0), Vector2i(0, 0), Vector2i(1, 0), Vector2i(0, 1)],
	"CORNER": [Vector2i(-1, -1), Vector2i(0, -1), Vector2i(-1, 0), Vector2i(0, 0)],
	"FULL": [Vector2i(-1, -1), Vector2i(0, -1), Vector2i(1, -1), Vector2i(-1, 0), Vector2i(0, 0), Vector2i(1, 0), Vector2i(-1, 1), Vector2i(0, 1)],
	"DOT3": [Vector2i(-1, 0), Vector2i(0, 0), Vector2i(1, 0)]
}

var player: Node3D
var enhanced_gridmap: Node
var rng: RandomNumberGenerator

# Effect durations
const FREEZE_ZONE_DURATION = 15.0
const FREEZE_SLOW_MULTIPLIER = 0.2 # Super slow down
const BLOCK_DURATION = 9.0
const INVISIBLE_DURATION = 6.0


# Active effect tracking
var blocked_tiles: Array[Dictionary] = [] # {position: Vector3i, original_item: int, timer: float}
var freeze_zones: Array[Dictionary] = [] # {position: Vector2i, timer: float}
var active_freeze_zones: Array = [] # Array of {center, radius, timer}
var invisible_timer: float = 0.0
var global_cooldown_timer: float = 0.0

# Targeting Mode
var is_targeting_mode: bool = false
var targeting_effect: int = -1
var target_indicator_pos: Vector2i = Vector2i.ZERO

# INVENTORY SYSTEM
# Stores count of each power-up type. Max 1 per type as per user request?
# "player can store 1 of each different power up"
var inventory = {
	SpecialEffect.FASTER_SPEED: false,
	SpecialEffect.AREA_FREEZE: false,
	SpecialEffect.BLOCK_FLOOR: false,
	SpecialEffect.INVISIBLE_MODE: false
}

# Signal for UI
signal inventory_updated(inventory_data: Dictionary)

func initialize(p_player: Node3D, p_gridmap: Node):
	player = p_player
	enhanced_gridmap = p_gridmap
	rng = RandomNumberGenerator.new()
	rng.randomize()
	
	# Ensure Powerup Tiles (11-14) are NOT in the non-walkable list
	if enhanced_gridmap and "non_walkable_items" in enhanced_gridmap:
		for id in HOLO_TILES:
			if id in enhanced_gridmap.non_walkable_items:
				enhanced_gridmap.non_walkable_items.erase(id)

# =============================================================================
# Helper: Item ID to Effect Enum
# =============================================================================
func get_effect_from_item(item_id: int) -> int:
	var mode = LobbyManager.get_game_mode()
	var is_restricted = GameMode.is_restricted(mode)
	
	match item_id:
		11: return SpecialEffect.FASTER_SPEED
		12: return SpecialEffect.AREA_FREEZE
		13: return SpecialEffect.BLOCK_FLOOR
		14: return SpecialEffect.INVISIBLE_MODE
		_: return -1

func add_powerup_from_item(item_id: int):
	var effect = get_effect_from_item(item_id)
	if effect == -1: return

	# 1-PowerUp Rule: If this is a DIFFERENT power-up, clear the old one
	var is_different = not inventory.get(effect, false)
	var already_has_any = false
	for e in inventory:
		if inventory[e]:
			already_has_any = true
			break
			
	if is_different and already_has_any:
		print("Player %s replacing existing powerup with %s" % [player.name, SpecialEffect.keys()[effect]])
		for e in inventory:
			inventory[e] = false
			powerup_levels[e] = 1 # Reset levels of discarded powerups
		_exit_targeting_mode()

	# Instant Level 8 on pickup (User Request)
	inventory[effect] = true
	powerup_levels[effect] = 8
	emit_signal("inventory_updated", inventory)
	emit_signal("powerup_unlocked", effect, 8)
	print("[SpecialTiles] SUCCESS: Player %s picked up %s. Force Level 8 applied." % [player.name, SpecialEffect.keys()[effect]])
		
	if player.is_multiplayer_authority() and multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer.get_connection_status() == MultiplayerPeer.CONNECTION_CONNECTED:
		rpc("sync_inventory_add", effect, 8)

@rpc("any_peer", "call_local", "reliable")
func sync_inventory_add(effect: int, level: int):
	# Clear others on sync too to maintain 1-powerup rule
	for e in inventory:
		inventory[e] = false
		powerup_levels[e] = 1 # Reset levels of discarded powerups
	
	_exit_targeting_mode()
		
	inventory[effect] = true
	powerup_levels[effect] = level
	emit_signal("inventory_updated", inventory)
	emit_signal("powerup_unlocked", effect, level)

func remove_powerup(effect: int):
	# User Request: "If the power up already use it will remain empty"
	if inventory.get(effect, false):
		inventory[effect] = false
		powerup_levels[effect] = 1
		emit_signal("inventory_updated", inventory)
		print("[SpecialTiles] Player %s consumed powerup %s" % [player.name, SpecialEffect.keys()[effect]])
		
		if player.is_multiplayer_authority() and multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer.get_connection_status() == MultiplayerPeer.CONNECTION_CONNECTED:
			rpc("sync_inventory_remove", effect)

@rpc("any_peer", "call_local", "reliable")
func sync_inventory_remove(effect: int):
	inventory[effect] = false
	powerup_levels[effect] = 1
	emit_signal("inventory_updated", inventory)

# =============================================================================
# Activate Effect (Explicit Target)
# =============================================================================

func activate_effect(effect: int, target_player: Node3D = null):
	# Validation
	if not inventory.get(effect, false):
		print("PowerUp %s not found in inventory or false. Inventory: %s" % [effect, inventory])
		return
		
	# Check Cooldown
	if global_cooldown_timer > 0:
		NotificationManager.send_message(player, "Skill in Cooldown! (%.1fs)" % global_cooldown_timer, NotificationManager.MessageType.WARNING)
		return
		
	# Check Attack Mode Restriction
	if player.get("is_attack_mode") and effect == SpecialEffect.INVISIBLE_MODE:
		NotificationManager.send_message(player, "Cannot enter Ghost mode while in Attack Mode!", NotificationManager.MessageType.WARNING)
		return

	# Check Carrying Restriction
	if player.get("is_carrying_tekton") and effect != SpecialEffect.FASTER_SPEED:
		NotificationManager.send_message(player, "Cannot use this power while carrying a Tekton!", NotificationManager.MessageType.WARNING)
		return

	var level = powerup_levels.get(effect, 1)
	print("[SpecialTiles] Player %s activated %s (Lvl %d)." % [player.name, SpecialEffect.keys()[effect], level])
	
	match effect:
		SpecialEffect.FASTER_SPEED:
			_execute_faster_speed()
		SpecialEffect.AREA_FREEZE, SpecialEffect.BLOCK_FLOOR:
			# TWO-CLICK LOGIC: First click starts Targeting Mode (Projection), second click executes.
			if is_targeting_mode and targeting_effect == effect:
				# SECOND CLICK: Execute at current indicator position
				_execute_targeted_effect_v2(effect, target_indicator_pos)
				_exit_targeting_mode()
			else:
				# FIRST CLICK: Start targeting
				_enter_targeting_mode(effect)
				return # Don't apply cooldown or generic effects yet
		SpecialEffect.INVISIBLE_MODE:
			_execute_invisible_mode(player)
	
	# Apply 5s cooldown globally
	global_cooldown_timer = 5.0
	emit_signal("global_cooldown_updated", global_cooldown_timer, GLOBAL_COOLDOWN_MAX)
	
	# Play generic cast animation or sound?
	if player.is_multiplayer_authority() and multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer.get_connection_status() == MultiplayerPeer.CONNECTION_CONNECTED:
		player.rpc("trigger_screen_shake", "light")
	
	# Consumable: Remove after use (User Request)
	print("[SpecialTiles] Consuming %s after successful activation." % SpecialEffect.keys()[effect])
	remove_powerup(effect)

# =============================================================================
# Targeting Mode Helpers
# =============================================================================

func _enter_targeting_mode(effect: int):
	is_targeting_mode = true
	targeting_effect = effect
	print("[SpecialTiles] Entered Targeting Mode for %s" % SpecialEffect.keys()[effect])
	# Visual feedback if needed

func _exit_targeting_mode():
	if is_targeting_mode:
		is_targeting_mode = false
		targeting_effect = -1
		if player.action_manager:
			player.action_manager.clear_highlights()
		print("[SpecialTiles] Exited Targeting Mode.")

func _update_targeting_preview():
	if not player.is_multiplayer_authority(): return
	
	# Logic for projection:
	# Freeze: 4 tiles ahead
	# Wall: Always behind player
	var distance = 4
	if targeting_effect == SpecialEffect.BLOCK_FLOOR:
		distance = -1 # 1 tile behind
		
	var move_dir = Vector2i.ZERO
	if player.movement_manager:
		move_dir = player.movement_manager.current_move_direction
		if move_dir == Vector2i.ZERO:
			move_dir = player.movement_manager.last_move_direction
	
	if move_dir == Vector2i.ZERO:
		move_dir = Vector2i(0, 1) # Fallback
		
	var center_pos = player.current_position + (move_dir * distance)
	target_indicator_pos = center_pos
	
	# Show highlights via ActionManager
	var area = get_skill_affected_area(targeting_effect, center_pos)
	
	# User Request: Use yellow/orange like hover (ID 1 in EnhancedGridMap)
	var indicator_id = 1 
	if player.action_manager:
		player.action_manager.highlight_cells_if_authorized(area, indicator_id)

func _execute_targeted_effect_v2(effect: int, target_pos: Vector2i):
	match effect:
		SpecialEffect.AREA_FREEZE:
			_execute_area_freeze(target_pos)
		SpecialEffect.BLOCK_FLOOR:
			_execute_block_floor(target_pos)


# =============================================================================
# Check if item is a holo tile
# =============================================================================

func is_holo_tile(item_id: int) -> bool:
	return item_id in HOLO_TILES

# =============================================================================
# Effect Implementations (New)
# =============================================================================

func _execute_faster_speed():
	# VFX: show speed initiator on all peers
	if player.is_multiplayer_authority() and player.has_method("can_rpc") and player.can_rpc():
		player.rpc("play_skill_vfx", "skill_speed")
	elif player.has_method("play_skill_vfx"):
		player.play_skill_vfx("skill_speed")
	if player.movement_manager:
		player.movement_manager.set_speed_multiplier(1.5) # 50% faster
		active_buffs[SpecialEffect.FASTER_SPEED] = FASTER_DURATION
		SfxManager.rpc("play_rpc", "speed")
		NotificationManager.send_message(player, "Speed Boost! (5s)", NotificationManager.MessageType.POWERUP)

func _execute_area_freeze(target_pos: Vector2i = Vector2i(-9999, -9999)):
	# VFX: show freeze initiator on all peers
	if player.is_multiplayer_authority() and player.has_method("can_rpc") and player.can_rpc():
		player.rpc("play_skill_vfx", "skill_freeze")
	elif player.has_method("play_skill_vfx"):
		player.play_skill_vfx("skill_freeze")
	
	# Determine Position: if passed Sentinel, fallback to projection ahead
	var center_pos = target_pos
	if center_pos.x == -9999:
		var last_dir = player.movement_manager.last_move_direction if (player and player.movement_manager) else Vector2i(0, 1)
		center_pos = player.current_position + (last_dir * 4)
	
	# Determine Level/Radius
	var current_lvl = powerup_levels.get(SpecialEffect.AREA_FREEZE, 1)
	var radius = 2 # Always 5x5 (radius 2)
		
	print("Player %s executing Area Freeze at %s (Lvl %d, Rad %d)" % [player.name, center_pos, current_lvl, radius])
	
	# Register Zone for persistence
	active_freeze_zones.append({
		"center": center_pos,
		"radius": radius,
		"timer": FREEZE_SLOW_DURATION
	})
	
	# Initial Check (Instant Feedback)
	var all_players = player.get_tree().get_nodes_in_group("Players")
	var hit_count = 0
	
	for p in all_players:
		# Check distance (Chebyshev distance for square area)
		var dx = abs(p.current_position.x - center_pos.x)
		var dy = abs(p.current_position.y - center_pos.y)
		
		# If inside square radius
		if dx <= radius and dy <= radius:
			if multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer.get_connection_status() == MultiplayerPeer.CONNECTION_CONNECTED:
				p.rpc("apply_slow_effect", 0.5)
			NotificationManager.send_message(p, "Caught in Freeze Zone!", NotificationManager.MessageType.WARNING)
			if p != player: # Don't score for freezing self (unless desired?) - Assuming enemies
				hit_count += 1
	
	SfxManager.rpc("play_rpc", "freeze")

	if hit_count > 0 and player.is_multiplayer_authority():
		var is_sng = LobbyManager.is_game_mode(GameMode.Mode.STOP_N_GO)
		if not is_sng:
			var points = hit_count * 50
			var main = player.get_tree().get_root().get_node_or_null("Main")
			if main:
				var gcm = main.get_node_or_null("GoalsCycleManager")
				if gcm:
					gcm.rpc("request_add_score", points)
				
			NotificationManager.send_message(player, "Hit %d Players! +%d Pts" % [hit_count, points], NotificationManager.MessageType.GOAL)
		else:
			NotificationManager.send_message(player, "Hit %d Players!" % hit_count, NotificationManager.MessageType.GOAL)

	# Visual Feedback (Layer 0 - Ground Level, matching Wall logic)
	if player.is_multiplayer_authority():
		var main_node = get_node_or_null("/root/Main")
		if main_node and main_node.has_method("sync_grid_items_batch"):
			var batch_data = []
			var restoration_data = [] # Stores {pos, item} to restore later
			
			for rx in range(-radius, radius + 1):
				for rz in range(-radius, radius + 1):
					var cx = center_pos.x + rx
					var cz = center_pos.y + rz
					var pos = Vector3i(cx, 0, cz)
					
					# Get original ground item to restore later
					var original_ground = enhanced_gridmap.get_cell_item(pos)
					
					# Ignore if it is an immutable tile (Safe Zone 2, Wall 4, etc)
					if original_ground in [1, 2, 3, 4, 15, 16]: continue
					
					restoration_data.append({"pos": pos, "item": original_ground})
					batch_data.append({"x": cx, "y": 0, "z": cz, "item": 5})
			
			if not batch_data.is_empty():
				main_node.rpc("sync_grid_items_batch", batch_data)
				
				# Removal timer with accurate restoration
				get_tree().create_timer(FREEZE_SLOW_DURATION).timeout.connect(func():
					var cl_node = get_node_or_null("/root/Main")
					if not cl_node: return
					var clear_batch = []
					for entry in restoration_data:
						var p = entry.pos
						# Only restore if it is STILL our Freeze tile
						if enhanced_gridmap.get_cell_item(p) == 5:
							clear_batch.append({"x": p.x, "y": 0, "z": p.z, "item": entry.item})
					if not clear_batch.is_empty():
						cl_node.rpc("sync_grid_items_batch", clear_batch)
				)


func _execute_block_floor(target_pos: Vector2i = Vector2i(-999, -999)):
	# VFX: show wall initiator on all peers
	if player.is_multiplayer_authority() and player.has_method("can_rpc") and player.can_rpc():
		player.rpc("play_skill_vfx", "skill_wall")
	elif player.has_method("play_skill_vfx"):
		player.play_skill_vfx("skill_wall")
	# "Wall Block" - Spawn line behind player
	var behind_pos = target_pos
	var last_dir = player.movement_manager.last_move_direction if player.movement_manager else Vector2i(0, 1)
	
	if behind_pos == Vector2i(-999, -999):
		behind_pos = player.current_position - last_dir
	
	if not enhanced_gridmap.is_position_valid(behind_pos):
		return
		
	# Rollback: Should be vertical or horizontal based on direction
	var neighbors = []
	if last_dir.x != 0:
		# Moving on X-axis (Columns) -> Vertical Wall (Fixed X, all Z)
		for z in range(enhanced_gridmap.rows):
			neighbors.append({"position": Vector2i(behind_pos.x, z)})
	else:
		# Moving on Z-axis (Rows) -> Horizontal Wall (Fixed Z, all X)
		for x in range(enhanced_gridmap.columns):
			neighbors.append({"position": Vector2i(x, behind_pos.y)})
	
	if player.is_multiplayer_authority():
		var main = get_node_or_null("/root/Main")
		if main and main.has_method("sync_grid_items_batch"):
			var batch_data = []
			for n in neighbors:
				var pos = n.position
				if _is_position_blocked_by_stand(pos): continue
				
				var block_pos = Vector3i(pos.x, 0, pos.y)
				var original_item = enhanced_gridmap.get_cell_item(block_pos)
				
				# PROTECTED FLOOR CHECK: avoid overwriting Start (1), Safe (2), Finish (3), or Wall (4)
				var is_immutable = false
				if "immutable_items" in enhanced_gridmap:
					if original_item in enhanced_gridmap.immutable_items:
						is_immutable = true
				if original_item in [1, 2, 3, 4, 15, 16] or is_immutable: continue
				
				batch_data.append({"x": block_pos.x, "y": 0, "z": block_pos.z, "item": 4})
				
				# Record for restoration
				blocked_tiles.append({
					"position": block_pos,
					"original_item": original_item,
					"timer": BLOCK_DURATION
				})
			
			if not batch_data.is_empty():
				main.rpc("sync_grid_items_batch", batch_data)
	
	# Notify
	SfxManager.rpc("play_rpc", "wall")
	NotificationManager.send_message(player, "Defensive Wall Deployed!", NotificationManager.MessageType.POWERUP)

func _execute_invisible_mode(target: Node3D):
	# VFX: show ghost initiator on all peers (on the caster/player, not the target)
	if player.is_multiplayer_authority() and player.has_method("can_rpc") and player.can_rpc():
		player.rpc("play_skill_vfx", "skill_ghost")
	elif player.has_method("play_skill_vfx"):
		player.play_skill_vfx("skill_ghost")
	target.is_invisible = true
	invisible_timer = INVISIBLE_DURATION
	
	# Visual Feedback: Ghost Mode (Low Alpha)
	if target.has_method("sync_modulate"):
		target.rpc("sync_modulate", Color(1.0, 1.0, 1.0, 0.4)) # 40% Opacity
		
	SfxManager.rpc("play_rpc", "ghost")
	NotificationManager.send_message(target, "Invisible Mode!", NotificationManager.MessageType.POWERUP)


# =============================================================================
# Helper: Spawn Powerups (For Super Push)
# =============================================================================

func spawn_powerups_around(center: Vector2i, force_powerups: bool = true, only_common: bool = false, full_density: bool = false):
	# "spawn / replace your nearby tiles into power up ( special tiles )"
	# New PowerUp Tiles are 11, 12, 13, 14
	SfxManager.rpc("play_rpc", "generate_tile")
	var radius = 2
	for x in range(-radius, radius + 1):
		for y in range(-radius, radius + 1):
			var pos = center + Vector2i(x, y)
			
			if _is_position_blocked_by_stand(pos):
				continue
				
			if enhanced_gridmap.is_position_valid(pos):
				# Random chance to spawn ANYTHING at this spot (keep density reasonable)
				if not full_density and rng.randf() > 0.5: continue
				
				# PROTECTED FLOOR CHECK: Don't spawn on existing walls or void
				var f0 = enhanced_gridmap.get_cell_item(Vector3i(pos.x, 0, pos.y))
				var f1 = enhanced_gridmap.get_cell_item(Vector3i(pos.x, 1, pos.y))
				
				# Stop n Go: Don't overwrite static powerup spawns (ID 15 floor)
				if LobbyManager.is_game_mode(GameMode.Mode.STOP_N_GO) and f0 == 15:
					continue
					
				if f0 in [4, -1] or f1 in [4, 16]:
					continue
				
				var item_id: int
				var mode = LobbyManager.get_game_mode()
				
				if only_common or LobbyManager.is_game_mode(GameMode.Mode.STOP_N_GO):
					# Spawn ONLY common tiles (7-10) in Stop n Go mode (User Request)
					item_id = rng.randi_range(7, 10)
				elif LobbyManager.is_game_mode(GameMode.Mode.GAUNTLET):
					# Gauntlet mode: No power-up tile spawns from world.
					# Only common tiles (7-10) spawn; Smack/Cleanser are handled separately.
					item_id = rng.randi_range(7, 10)
				else:
					# Other modes: 80% Chance for Common Tile (7-10), 20% for PowerUp
					if rng.randf() < 0.8:
						item_id = rng.randi_range(7, 10)
					else:
						# 20% Chance for PowerUp
						if LobbyManager.is_game_mode(GameMode.Mode.TEKTON_DOORS):
							# Restrict to Speed (11) and Ghost (14) for Tekton Doors
							item_id = [11, 14].pick_random()
						else:
							item_id = rng.randi_range(11, 14)
				
				var cell = Vector3i(pos.x, 1, pos.y)
				
				# PREVENT SPAWNING ON FROZEN FLOORS (Visual/Lag Fix)
				var is_frozen = false
				if enhanced_gridmap:
					# Check Layer 2 for Freeze Overlay (ID 5)
					if enhanced_gridmap.get_cell_item(Vector3i(pos.x, 2, pos.y)) == 5:
						is_frozen = true
				
				if is_frozen:
					continue
				
				if player.is_multiplayer_authority():
					var main = player.get_tree().get_root().get_node_or_null("Main")
					if main and multiplayer.has_multiplayer_peer() and multiplayer.multiplayer_peer.get_connection_status() == MultiplayerPeer.CONNECTION_CONNECTED:
						main.rpc("sync_grid_item", cell.x, cell.y, cell.z, item_id)


func _update_freeze_zones(delta: float):
	# Only the authority of this manager (the caster) handles the timers and cleanup
	if not active_freeze_zones.is_empty():
		var zones_to_remove = []
		
		for i in range(active_freeze_zones.size()):
			var zone = active_freeze_zones[i]
			zone.timer -= delta
			
			# Check for players inside this zone (Trap Logic)
			var all_players = player.get_tree().get_nodes_in_group("Players")
			for p in all_players:
				# Invisible Immunity (Passive)
				if p.get("is_invisible"): continue
				
				var dx = abs(p.current_position.x - zone.center.x)
				var dy = abs(p.current_position.y - zone.center.y)
				
				# If inside zone
				if dx <= zone.radius and dy <= zone.radius:
					# Apply slow effect via RPC only IF not already slowed to prevent network flood
					if "movement_manager" in p and p.movement_manager and p.movement_manager.speed_multiplier >= 1.0:
						p.rpc("apply_slow_effect", 0.5)

			if zone.timer <= 0:
				zones_to_remove.append(i)
			
		# Cleanup expired zones
		zones_to_remove.reverse()
		for idx in zones_to_remove:
			active_freeze_zones.remove_at(idx)

func _check_for_icy_floor():
	# Every player checks if they are standing on an icy floor (item 15 on layer 2)
	# This ensures slow-mo works even if zones were cast by another player.
	if not multiplayer.has_multiplayer_peer():
		return
	if not player.is_multiplayer_authority():
		return
		
	# Invisible Immunity (Passive)
	if player.is_invisible:
		return
		
	if not enhanced_gridmap:
		return
		
	var current_item = enhanced_gridmap.get_cell_item(Vector3i(player.current_position.x, 2, player.current_position.y))
	if current_item == 5: # Freeze Floor
		_apply_slow_mo(player)
	elif player.movement_manager and player.movement_manager.speed_multiplier < 1.0:
		# Check if we should restore speed
		# In this case, we'll let _apply_slow_mo's timer handle it, 
		# OR we can explicitly reset here if NOT on item 15.
		pass

func _process(delta):
	# Update Global Cooldown
	if global_cooldown_timer > 0:
		global_cooldown_timer -= delta
		if global_cooldown_timer <= 0:
			global_cooldown_timer = 0
		emit_signal("global_cooldown_updated", global_cooldown_timer, GLOBAL_COOLDOWN_MAX)
		
	# Update Active Buffs (Speed)
	if active_buffs.has(SpecialEffect.FASTER_SPEED):
		active_buffs[SpecialEffect.FASTER_SPEED] -= delta
		if active_buffs[SpecialEffect.FASTER_SPEED] <= 0:
			active_buffs.erase(SpecialEffect.FASTER_SPEED)
			if player.movement_manager:
				player.movement_manager.set_speed_multiplier(1.0) # Reset
			NotificationManager.send_message(player, "Speed Boost Ended", NotificationManager.MessageType.NORMAL)

	_update_blocked_tiles(delta)
	_update_invisible_timer(delta)
	_update_freeze_zones(delta)
	_check_for_icy_floor()
	
	if is_targeting_mode:
		_update_targeting_preview()

func _apply_slow_mo(target_player: Node3D):
	if target_player.has_method("apply_stagger") and target_player.is_frozen:
		return # Already fully frozen/staggered
		
	if target_player.movement_manager:
		target_player.movement_manager.set_speed_multiplier(FREEZE_SLOW_MULTIPLIER)
		# Visual tint
		if target_player.has_method("sync_modulate"):
			target_player.rpc("sync_modulate", Color(0.6, 0.8, 1.0)) # Icy blue
			
		# Reset speed after a short delay if they leave
		_create_restore_speed_timer(target_player, 0.2)

func _create_restore_speed_timer(target_player: Node3D, duration: float):
	# We use a short timer to reset speed. If they are still in the zone, 
	# _process will re-apply it next frame.
	await player.get_tree().create_timer(duration).timeout
	if is_instance_valid(target_player) and target_player.movement_manager:
		# Check if they are still on an icy floor
		var still_in_zone = false
		if enhanced_gridmap:
			var item = enhanced_gridmap.get_cell_item(Vector3i(target_player.current_position.x, 2, target_player.current_position.y))
			if item == 5: # Freeze Floor
				still_in_zone = true
		
		if not still_in_zone:
			target_player.movement_manager.set_speed_multiplier(1.0)
			if target_player.has_method("sync_modulate"):
				target_player.rpc("sync_modulate", Color.WHITE)

func _update_invisible_timer(delta: float):
	if invisible_timer > 0:
		invisible_timer -= delta
		if invisible_timer <= 0:
			invisible_timer = 0
			if is_instance_valid(player):
				player.is_invisible = false
				# Reset Visuals
				if player.has_method("sync_modulate"):
					player.rpc("sync_modulate", Color.WHITE)
					
				NotificationManager.send_message(player, "Invisibility Ended", NotificationManager.MessageType.NORMAL)


# =============================================================================
# Helper Functions
# =============================================================================

func _get_empty_neighbors_recursive(center: Vector2i, radius: int) -> Array[Vector2i]:
	var result: Array[Vector2i] = []
	for x in range(-radius, radius + 1):
		for y in range(-radius, radius + 1):
			var pos = center + Vector2i(x, y)
			if enhanced_gridmap.is_position_valid(pos):
				if enhanced_gridmap.get_cell_item(Vector3i(pos.x, 1, pos.y)) == -1:
					result.append(pos)
	return result

func _update_blocked_tiles(delta: float):
	var tiles_to_restore: Array[int] = []
	
	for i in range(blocked_tiles.size()):
		blocked_tiles[i].timer -= delta
		if blocked_tiles[i].timer <= 0:
			tiles_to_restore.append(i)
	
	# Restore tiles in reverse order to maintain indices
	tiles_to_restore.reverse()
	for idx in tiles_to_restore:
		var tile_data = blocked_tiles[idx]
		if player.is_multiplayer_authority():
			var main = player.get_tree().get_root().get_node_or_null("Main")
			if main:
				main.rpc("sync_grid_item", tile_data.position.x, tile_data.position.y, tile_data.position.z, tile_data.original_item)
		blocked_tiles.remove_at(idx)
	
	if tiles_to_restore.size() > 0:
		enhanced_gridmap.initialize_astar()

# =============================================================================
# Shield Check (for Invisible Mode)
# =============================================================================

func check_shield_and_cancel_effect() -> bool:
	"""Returns true if player has shield (invisible mode) and cancels the incoming effect."""
	if player.get("is_invisible"):
		player.set("is_invisible", false)
		invisible_timer = 0 # Cancel timer
		if player.get("original_movement_range"):
			player.movement_range = player.original_movement_range
		NotificationManager.send_message(player, NotificationManager.MESSAGES.SHIELD_BLOCKED, NotificationManager.MessageType.POWERUP)
		return true
	return false

func _create_unfreeze_timer(target_player: Node3D, duration: float):
	await player.get_tree().create_timer(duration).timeout
	if is_instance_valid(target_player):
		target_player.set("is_frozen", false)
		# Reset visuals
		if target_player.has_method("sync_modulate"):
			target_player.rpc("sync_modulate", Color.WHITE)
		NotificationManager.send_message(target_player, "You are no longer frozen!", NotificationManager.MessageType.NORMAL)

func _is_position_blocked_by_stand(target_pos: Vector2i) -> bool:
	if not player: return false
	
	# Raycast check for Static Tekton Stand
	# Check CENTER of tile (x+0.5) at LOW height (0.3)
	var from = Vector3(target_pos.x + 0.5, 0.3, target_pos.y + 0.5) + Vector3.UP * 2.0
	var to = Vector3(target_pos.x + 0.5, 0.3, target_pos.y + 0.5) + Vector3.DOWN * 2.0
	
	var query = PhysicsRayQueryParameters3D.create(from, to)
	query.collide_with_areas = false
	query.collide_with_bodies = true
	
	var space_state = player.get_world_3d().direct_space_state
	var result = space_state.intersect_ray(query)
	
	if result:
		if result.collider != player:
			return true
	return false