extends Node



var player: Node3D
var enhanced_gridmap: Node

# Movement settings
var movement_range: int = 1
var use_diagonal_movement: bool = false
var is_moving: bool = false
var rotation_speed: float = 10.0
var target_rotation: float = 0.0
var speed_multiplier: float = 1.0 # For slow-mo effects

func initialize(p_player: Node3D, p_gridmap: Node):
	player = p_player
	enhanced_gridmap = p_gridmap
	
	# Initialize settings from player if available
	if "movement_range" in player:
		movement_range = player.movement_range
	if "use_diagonal_movement" in player:
		use_diagonal_movement = player.use_diagonal_movement

signal movement_finished
var movement_queue: Array[Vector2i] = [] # Queue of target grid positions
var current_move_direction: Vector2i = Vector2i.ZERO
var last_move_direction: Vector2i = Vector2i(0, 1) # Default forward (towards +Z)

func _process(delta):
	if player:
		_handle_rotation(delta)

func _handle_rotation(delta):
	if player.rotation.y != target_rotation:
		player.rotation.y = lerp_angle(player.rotation.y, target_rotation, delta * rotation_speed)

func rotate_towards_target(target_pos: Vector2i):
	var direction = Vector3(target_pos.x - player.current_position.x, 0, target_pos.y - player.current_position.y)
	if direction != Vector3.ZERO:
		target_rotation = atan2(direction.x, direction.z)
		if player.is_multiplayer_authority() and _can_rpc():
			player.rpc("sync_rotation", target_rotation)

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

func simple_move_to(grid_position: Vector2i) -> bool:
	if is_moving:
		return false
		
	if not player.is_multiplayer_authority():
		print("[Move] Failed: Not authority for %s (Authority: %d, My Peer: %d)" % [player.name, player.get_multiplayer_authority(), player.multiplayer.get_unique_id()])
		return false
	
	if player.get("is_frozen") or player.get("is_stop_frozen"):
		print("[Move] Failed: Player is frozen")
		return false

	# BLOCK MOVEMENT IF MATCH NOT ACTIVE (Countdown)
	var main = player.get_tree().root.get_node_or_null("Main")
	if main and main.goals_cycle_manager and not main.goals_cycle_manager.is_match_active:
		return false

	var distance: int
	if use_diagonal_movement:
		distance = max(abs(grid_position.x - player.current_position.x), abs(grid_position.y - player.current_position.y))
	else:
		distance = abs(grid_position.x - player.current_position.x) + abs(grid_position.y - player.current_position.y)
	
	if distance > movement_range:
		return false
	
	if not enhanced_gridmap.is_position_valid(grid_position):
		# print("[Move] Failed: Position not valid on GridMap %s" % grid_position)
		return false

	if player.has_method("can_move_to_finish") and not player.can_move_to_finish(grid_position):
		print("[Move] Failed: Cannot move to finish yet")
		return false

	var cell_floor = enhanced_gridmap.get_cell_item(Vector3i(grid_position.x, 0, grid_position.y))
	var cell_item = enhanced_gridmap.get_cell_item(Vector3i(grid_position.x, 1, grid_position.y))
	
	# Allow passing through Walls (Item 4 or 16) if Invisible
	var is_wall_passable = player.get("is_invisible") and (cell_floor == 4 or cell_item == 16 or cell_item == 4)
	
	# Check Floor 0 (Basic Walkability/Void)
	if (cell_floor == -1 or cell_floor in enhanced_gridmap.non_walkable_items) and not is_wall_passable:
		print("[Move] Failed: Floor Item %d is non-walkable" % cell_floor)
		return false
		
	# Check Floor 1 (Obstacles/Walls)
	if (cell_item != -1 and cell_item in [4, 16]) and not is_wall_passable:
		print("[Move] Failed: Blocked by Item %d on Floor 1" % cell_item)
		return false
	
	# PHYSICS CHECK: Ensure no static obstacles (like Wall blocks or Stands) are blocking the path
	if _is_path_blocked_by_physics(player.current_position, grid_position):
		print("[Move] Failed: Path blocked by physics at %s" % grid_position)
		return false
	
	if player.is_position_occupied(grid_position):
		var push_dir = grid_position - player.current_position
		if not try_push(grid_position, push_dir):
			return false
	
	# Check for Tekton interaction (Knock Mode)
	# If moving into a Tekton's space while in Knock Mode, trigger knock
	if player.get("is_knock_mode"):
		# Find Tekton at grid_position
		var tektons = player.get_tree().get_nodes_in_group("Tektons")
		for t in tektons:
			if t.current_position == grid_position and not t.is_carried:
				# Trigger Knock
				player.knock_tekton()
				return false # Don't move into the tile, just knock


	rotate_towards_target(grid_position)
	
	rotate_towards_target(grid_position)
	
	if player.is_multiplayer_authority():
		if player.has_method("sync_walk_animation"):
			if _can_rpc():
				player.rpc("sync_walk_animation")
			else:
				player.sync_walk_animation()

	var path = [Vector2(player.current_position.x, player.current_position.y), Vector2(grid_position.x, grid_position.y)]
	path.pop_front()
	
	current_move_direction = grid_position - player.current_position
	if current_move_direction != Vector2i.ZERO:
		last_move_direction = current_move_direction
	
	if player.is_multiplayer_authority():
		# Authority starts their own tween locally
		var is_bot = player.is_bot or player.is_in_group("Bots")
		player.start_movement_along_path(path, not is_bot)
		
		# Authority sends RPC to others (call_remote) to start their tweens
		if _can_rpc():
			player.rpc("start_movement_along_path", path, not is_bot)
	
	return true

func try_push(target_pos: Vector2i, direction: Vector2i) -> bool:
	if not player.has_method("get_player_at_position"):
		return false
		
	var other_player = player.get_player_at_position(target_pos)
	if not other_player:
		return false
	
	# === INVULNERABILITY CHECK ===
	if other_player.get("is_carrying_tekton"):
		print("[Move] Push blocked: Target is carrying a Tekton and is invulnerable.")
		NotificationManager.send_message(player, "Target is Immune!", NotificationManager.MessageType.WARNING)
		return false

	# === NEW LOGIC: Only allow push if in ATTACK MODE and NOT GHOST ===
	if not player.get("is_attack_mode") or player.get("is_invisible"):
		# Standard bumping effect (Visual only)
		print("[Move] Push blocked: Not in attack mode or is Ghost (%s trying to push %s)" % [player.name, other_player.name])
		if _can_rpc():
			player.rpc("sync_bump", target_pos, true) # Soft bump
		elif player.has_method("sync_bump"):
			player.sync_bump(target_pos, true)
		return false

	# SAFE ZONE PROTECTION (Only in Stop n Go)
	if LobbyManager.is_game_mode(GameMode.Mode.STOP_N_GO):
		var safe_columns = [6, 7, 8, 14, 15, 16]
		# 1. Prevent attacker from attacking IF THEY ARE in a Safe Zone
		if player.current_position.x in safe_columns:
			print("  - Attack BLOCKED: Attacker is in Safe Zone!")
			NotificationManager.send_message(player, "Cannot Attack while in Safe Zone!", NotificationManager.MessageType.WARNING)
			return false
			
		# 2. Prevent attacking players WHO ARE in a Safe Zone (existing logic)
		if target_pos.x in safe_columns:
			print("  - Attack BLOCKED: Target is in Safe Zone!")
			NotificationManager.send_message(player, "Target is in Safe Zone!", NotificationManager.MessageType.WARNING)
			return false
	
	# === SUPER PUSH (Attack Mode) ===
	print("Player %s SUPER PUSHING %s!" % [player.name, other_player.name])
	
	# Visual Feedback: Attack Bump
	if _can_rpc():
		player.rpc("sync_bump", target_pos, false) # Attack bump
	elif player.has_method("sync_bump"):
		player.sync_bump(target_pos, false)
	
	# 1. 3-Floor Knockback towards Starting Line (X=0)
	var push_direction = Vector2i(-1, 0) # Backwards
	var pushed_to_pos = target_pos
	var push_path = []
	
	# Try to push up to 3 tiles back, building the path as we go
	for i in range(3):
		var next_back = pushed_to_pos + push_direction
		if _can_push_to(next_back):
			pushed_to_pos = next_back
			push_path.append(Vector2(pushed_to_pos.x, pushed_to_pos.y))
		else:
			break # Blocked by wall or edge
			
	if push_path.size() > 0:
		# Valid push movement
		if _can_rpc():
			# Pass 'true' for 'force' parameter to interrupt active movements
			other_player.rpc("start_movement_along_path", push_path, false, true)
		
		# Authority Check: If we are already the authority for the victim (e.g. Host hitting a Bot),
		# the 'call_remote' RPC above won't execute locally. We MUST call it manually.
		if other_player.is_multiplayer_authority():
			other_player.start_movement_along_path(push_path, false, true)
		
		other_player.target_position = pushed_to_pos # Logical update
		
	# 2. Apply freeze/stun effect (blue tint)
	if _can_rpc():
		other_player.rpc("apply_stagger", 1.5)
	else:
		# Handle local execution (e.g. offline or host-only logic)
		other_player.apply_stagger(1.5)

	# 4. Consume Boost (Full) - One hit per charge
	if player.powerup_manager:
		# Consume all available boost to force a full recharge cycle
		player.powerup_manager.consume_boost(100.0)
		
		# SCORING: 200 Points for successful attack (ONLY in Free Mode)
		if player.is_multiplayer_authority():
			var is_sng = LobbyManager.is_game_mode(GameMode.Mode.STOP_N_GO)
			if not is_sng:
				var main = player.get_tree().get_root().get_node_or_null("Main")
				if main:
					var gcm = main.get_node_or_null("GoalsCycleManager")
					if gcm:
						if multiplayer.is_server():
							# Server/Bot: Directly add score to specific player ID
							gcm.add_score(player.name.to_int(), 200)
						else:
							# Client: Request score add (sender ID used)
							gcm.rpc("request_add_score", 200)
				NotificationManager.send_message(player, "Successful Attack! +200 Pts", NotificationManager.MessageType.GOAL)
			else:
				NotificationManager.send_message(player, "Successful Attack!", NotificationManager.MessageType.GOAL)

	# 5. Block the attacker from moving into the victim's space to prevent overlapping
	return false

func set_speed_multiplier(multiplier: float):
	speed_multiplier = multiplier
	# If we are currently moving, we might need to adjust the speed of the active tween?
	# However, the movement is handled via RPC 'start_movement_along_path' which 
	# likely uses a fixed speed or duration on all clients.
	# Let's check how 'start_movement_along_path' is implemented in player.gd.



func _on_movement_finished():
	if not movement_queue.is_empty():
		var next_target = movement_queue.pop_front()
		# Use a small delay or call_deferred to avoid recursion issues, 
		# but keep it snappy by executing immediately if possible.
		if not simple_move_to(next_target):
			# If next move failed, clear queue and signal finished
			movement_queue.clear()
			current_move_direction = Vector2i.ZERO
			emit_signal("movement_finished")
	else:
		current_move_direction = Vector2i.ZERO
		emit_signal("movement_finished")

func move_to_clicked_position(grid_position: Vector2i) -> bool:
	if not player.is_multiplayer_authority() or is_moving or player.action_points <= 0:
		return false
	
	# Check if player is frozen
	if player.get("is_frozen") or player.get("is_stop_frozen"):
		return false
		
	# BLOCK MOVEMENT IF MATCH NOT ACTIVE (Countdown)
	var main = player.get_tree().root.get_node_or_null("Main")
	if main and main.goals_cycle_manager and not main.goals_cycle_manager.is_match_active:
		return false
	
	# Validate grid position is within bounds
	if not enhanced_gridmap.is_position_valid(grid_position):
		return false
	
	# Check finish line logic
	if player.has_method("can_move_to_finish") and not player.can_move_to_finish(grid_position):
		return false
		
	# This function seems to rely on pathfinding or just direct move if adjacent?
	# The original code for move_player_to_clicked_position called simple_move_to if adjacent?
	# Actually original code for move_player_to_clicked_position wasn't fully shown in previous view_file.
	# Let's assume it uses pathfinding if not adjacent, or just validates and moves.
	
	# For now, let's just try simple move if it's adjacent
	return simple_move_to(grid_position)

func is_within_movement_range(target_position: Vector2i) -> bool:
	var distance: int
	if use_diagonal_movement:
		distance = max(abs(target_position.x - player.current_position.x), abs(target_position.y - player.current_position.y))
	else:
		distance = abs(target_position.x - player.current_position.x) + abs(target_position.y - player.current_position.y)
	return distance <= movement_range

# Update highlight_movement_range to respect the expanded obstacle blocking
func highlight_movement_range():
	if not player.is_multiplayer_authority() or player.is_bot or player.is_in_group("Bots"):
		return
	
	# Prevent recursive highlighting
	if player._is_highlighting:
		return
	player._is_highlighting = true
	
	player.clear_highlights()
	var cells_to_highlight = []
	
	# First, identify all cells that are blocked by obstacles
	var blocked_cells = []
	
	# Obstacle blocking logic removed
	
	# Now highlight all cells within movement range that aren't blocked
	for x in range(max(0, player.current_position.x - movement_range),
				  min(enhanced_gridmap.columns, player.current_position.x + movement_range + 1)):
		for z in range(max(0, player.current_position.y - movement_range),
					  min(enhanced_gridmap.rows, player.current_position.y + movement_range + 1)):
			var test_pos = Vector2i(x, z)
			
			# Skip current position
			if test_pos == player.current_position:
				continue
			
			# Check if within movement range
			if is_within_movement_range(test_pos):
				# Skip if blocked by obstacle
				if test_pos in blocked_cells:
					continue
				
				# Check basic walkability
				var cell_item = enhanced_gridmap.get_cell_item(Vector3i(x, 0, z))
				
				# Allow passing through Walls (Item 4) if Invisible
				var is_wall_passable = player.get("is_invisible") and cell_item == 4
				
				if (cell_item == -1 or cell_item in enhanced_gridmap.non_walkable_items) and not is_wall_passable:
					continue
				
				if player.is_position_occupied(test_pos):
					continue
				
				# Check if there's a valid path to this cell
				if can_reach_cell(test_pos, blocked_cells):
					cells_to_highlight.append(test_pos)
	
	# At the end of the function:
	player.highlight_cells_if_authorized(cells_to_highlight)
	player._is_highlighting = false

# Helper function to check if a cell can be reached given the blocked cells
func can_reach_cell(target_pos: Vector2i, blocked_cells: Array) -> bool:
	# Simple BFS to find if there's a path
	var queue = [player.current_position]
	var visited = {player.current_position: true}
	var steps = {player.current_position: 0}
	
	while not queue.is_empty():
		var current = queue.pop_front()
		
		# If we've found the target, check if it's within movement range
		if current == target_pos:
			return steps[current] <= movement_range
		
		# If we've used all movement, don't explore further
		if steps[current] >= movement_range:
			continue
		
		# Try all adjacent cells
		var directions = [
			Vector2i(0, -1), # North
			Vector2i(1, 0), # East
			Vector2i(0, 1), # South
			Vector2i(-1, 0), # West
		]
		
		# Add diagonal directions if enabled
		if enhanced_gridmap.diagonal_movement:
			directions.append(Vector2i(-1, -1)) # Northwest
			directions.append(Vector2i(1, -1)) # Northeast
			directions.append(Vector2i(-1, 1)) # Southwest
			directions.append(Vector2i(1, 1)) # Southeast
		
		for dir in directions:
			var next_pos = current + dir
			
			# Skip if already visited, blocked, or not valid
			if visited.has(next_pos) or next_pos in blocked_cells:
				continue
			
			# Custom Walkable Check incorporating invisibility
			var cell_item = enhanced_gridmap.get_cell_item(Vector3i(next_pos.x, 0, next_pos.y))
			var is_wall_passable = player.get("is_invisible") and cell_item == 4
			
			if (not enhanced_gridmap.is_position_valid(next_pos) or \
			   (cell_item in enhanced_gridmap.non_walkable_items and not is_wall_passable) or \
			   cell_item == -1):
				continue
				
			if player.is_position_occupied(next_pos) and next_pos != target_pos:
				continue
			
			# Check if movement between cells is blocked by an obstacle
			# if not is_diagonal_direction(dir) and enhanced_gridmap.is_movement_blocked(current, next_pos, 3):
			# 	continue
				
			# For diagonal movement, check if both orthogonal paths are blocked
			if is_diagonal_direction(dir):
				var mid1 = Vector2i(next_pos.x, current.y)
				var mid2 = Vector2i(current.x, next_pos.y)
				
				var path1_blocked = mid1 in blocked_cells # or enhanced_gridmap.is_movement_blocked(current, mid1, 3)
				var path2_blocked = mid2 in blocked_cells # or enhanced_gridmap.is_movement_blocked(current, mid2, 3)
				
				if path1_blocked and path2_blocked:
					continue
			
			# Add to queue
			queue.append(next_pos)
			visited[next_pos] = true
			steps[next_pos] = steps[current] + 1
	
	return false

# Helper function to check if a direction is diagonal
func is_diagonal_direction(direction: Vector2i) -> bool:
	return direction.x != 0 and direction.y != 0

func highlight_adjacent_cells():
	if not player.is_multiplayer_authority() or player.is_bot or player.is_in_group("Bots"):
		return
		
	var cells_to_highlight = []
	
	# Add current position if item exists
	var current_cell = Vector3i(player.current_position.x, 1, player.current_position.y)
	if enhanced_gridmap.get_cell_item(current_cell) != -1:
		cells_to_highlight.append(player.current_position)
	
	# Add valid neighbors
	var neighbors = enhanced_gridmap.get_neighbors(player.current_position, 0)
	for neighbor in neighbors:
		if neighbor.is_walkable:
			var cell_pos = neighbor.position
			if enhanced_gridmap.get_cell_item(Vector3i(cell_pos.x, 1, cell_pos.y)) != -1:
				cells_to_highlight.append(cell_pos)
	
	player.highlight_cells_if_authorized(cells_to_highlight)

func _is_position_in_static_stand_area(pos: Vector2i) -> bool:
	# Check against all known Static Tekton Stands (3x3 areas)
	var stands = player.get_tree().get_nodes_in_group("StaticTektonStands")
	print("[Debug] Checking Push Prevention for %s. Found %d stands." % [pos, stands.size()])
	
	for stand in stands:
		if not enhanced_gridmap: continue
		
		# Convert world to grid. Use global_position just to be safe.
		var local_pos = enhanced_gridmap.to_local(stand.global_position)
		var stand_grid_pos = enhanced_gridmap.local_to_map(local_pos)
		
		# Stand is centered, so key check is 3x3 around it
		var center = Vector2i(stand_grid_pos.x, stand_grid_pos.z)
		
		# Check if pos is right on top of stand (distance 0) or adjacent (distance 1)
		# Chebyshev distance <= 1 means 3x3 square
		if abs(pos.x - center.x) <= 1 and abs(pos.y - center.y) <= 1:
			print("  - BLOCKED by Stand at %s (Center: %s)" % [stand.name, center])
			return true
			
	return false

func _can_push_to(pos: Vector2i) -> bool:
	"""Helper to validate if a grid position is a safe landing spot for a push."""
	if not enhanced_gridmap or not enhanced_gridmap.is_position_valid(pos):
		return false
		
	var cell_item = enhanced_gridmap.get_cell_item(Vector3i(pos.x, 0, pos.y))
	# Must be walkable and NOT in non_walkable_items (to prevent getting stuck on walls/blocks)
	if cell_item == -1 or cell_item in enhanced_gridmap.non_walkable_items:
		return false
		
	if player.is_position_occupied(pos):
		return false
		
	if _is_position_in_static_stand_area(pos):
		return false
		
	if _is_path_blocked_by_physics(player.current_position, pos):
		return false
		
	return true

func _is_path_blocked_by_physics(from_grid: Vector2i, to_grid: Vector2i) -> bool:
	if not player.is_inside_tree(): return false
	
	var space_state = player.get_world_3d().direct_space_state
	
	# 1. Path check: Block movement if a wall exists between the current and target tile
	var from_v3 = Vector3(from_grid.x + 0.5, 0.5, from_grid.y + 0.5)
	var to_v3 = Vector3(to_grid.x + 0.5, 0.5, to_grid.y + 0.5)
	
	var path_query = PhysicsRayQueryParameters3D.create(from_v3, to_v3)
	path_query.collide_with_areas = false
	path_query.collide_with_bodies = true
	
	var path_result = space_state.intersect_ray(path_query)
	if path_result:
		if path_result.collider != player:
			# Ghost mode can bypass physical thin walls like Safe Zone walls
			if player.get("is_invisible") and (path_result.collider.is_in_group("SafeZoneWalls") or path_result.collider.name.begins_with("Wall")):
				pass
			else:
				return true
			
	# 2. Target tile occupancy check: Block if a static object is in the middle of the tile
	var target_from = Vector3(to_grid.x + 0.5, 1.0, to_grid.y + 0.5)
	var target_to = Vector3(to_grid.x + 0.5, 0.1, to_grid.y + 0.5)
	
	var target_query = PhysicsRayQueryParameters3D.create(target_from, target_to)
	target_query.collide_with_areas = false
	target_query.collide_with_bodies = true
	
	var target_result = space_state.intersect_ray(target_query)
	if target_result:
		if target_result.collider != player:
			# This hits objects like Stands that sit in the center of the tile
			return true
			
	return false