add a chat window

src/scenes/chat_ui.tscn

@@ -0,0 +1,66 @@
+[gd_scene format=3 uid="uid://chatui1234567"]
+
+[ext_resource type="Script" path="res://scripts/chat_ui.gd" id="1_chat_ui"]
+[ext_resource type="FontFile" path="res://assets/fonts/Metropolis/TrueType/Metropolis-Regular.ttf" id="2_metropolis"]
+
+[sub_resource type="Theme" id="Theme_metropolis"]
+default_font = ExtResource("2_metropolis")
+default_font_size = 12
+
+[node name="ChatUI" type="CanvasLayer" unique_id=2000000000]
+layer = 200
+script = ExtResource("1_chat_ui")
+
+[node name="ChatContainer" type="Control" parent="." unique_id=3000000000]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 1
+
+[node name="BottomLeft" type="MarginContainer" parent="ChatContainer" unique_id=4000000000]
+layout_mode = 1
+anchors_preset = 1
+anchor_left = 0.0
+anchor_top = 1.0
+anchor_right = 0.0
+anchor_bottom = 1.0
+offset_left = 10.0
+offset_top = -200.0
+offset_right = 400.0
+offset_bottom = -10.0
+grow_horizontal = 0
+grow_vertical = 0
+
+[node name="Background" type="ColorRect" parent="ChatContainer/BottomLeft" unique_id=5000000000]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 0.5)
+mouse_filter = 1
+visible = false
+
+[node name="VBox" type="VBoxContainer" parent="ChatContainer/BottomLeft" unique_id=6000000000]
+layout_mode = 2
+
+[node name="MessageScroll" type="ScrollContainer" parent="ChatContainer/BottomLeft/VBox" unique_id=7000000000]
+layout_mode = 2
+size_flags_vertical = 3
+custom_minimum_size = Vector2(380, 150)
+
+[node name="MessageList" type="VBoxContainer" parent="ChatContainer/BottomLeft/VBox/MessageScroll" unique_id=8000000000]
+layout_mode = 2
+size_flags_horizontal = 3
+size_flags_vertical = 3
+
+[node name="ChatInput" type="LineEdit" parent="ChatContainer/BottomLeft/VBox" unique_id=10000000000]
+layout_mode = 2
+size_flags_horizontal = 3
+theme = SubResource("Theme_metropolis")
+placeholder_text = "Type a message..."
+visible = false

src/scripts/chat_ui.gd

@@ -0,0 +1,353 @@
+extends CanvasLayer
+
+# Chat UI - Handles in-game chat with network sync
+
+const MAX_MESSAGES = 100  # Maximum messages to keep in history
+const MESSAGE_FADE_TIME = 5.0  # Seconds before message starts fading
+const MESSAGE_FADE_DURATION = 2.0  # Duration of fade out
+const RECENT_MESSAGE_TIME = 7.0  # Show background if message is this recent
+
+# Player colors for chat names
+var player_colors = [
+	Color.RED,
+	Color.GREEN,
+	Color.BLUE,
+	Color.ORANGE,
+	Color(0.5, 0.0, 0.5)  # Purple
+]
+
+var chat_open: bool = false
+var messages: Array = []  # Array of {timestamp: String, player_name: String, message: String, time: float}
+var network_manager: Node = null
+
+# UI Nodes
+var chat_container: Control = null
+var message_scroll: ScrollContainer = null
+var message_list: VBoxContainer = null
+var chat_input: LineEdit = null
+var background: ColorRect = null
+
+# Metropolis font
+var metropolis_font: FontFile = null
+
+func _ready():
+	network_manager = get_node_or_null("/root/NetworkManager")
+	
+	# Load Metropolis font
+	var font_path = "res://assets/fonts/Metropolis/TrueType/Metropolis-Regular.ttf"
+	if ResourceLoader.exists(font_path):
+		metropolis_font = load(font_path)
+	
+	# Get UI nodes from scene
+	chat_container = get_node_or_null("ChatContainer")
+	background = get_node_or_null("ChatContainer/BottomLeft/Background")
+	message_scroll = get_node_or_null("ChatContainer/BottomLeft/VBox/MessageScroll")
+	message_list = get_node_or_null("ChatContainer/BottomLeft/VBox/MessageScroll/MessageList")
+	chat_input = get_node_or_null("ChatContainer/BottomLeft/VBox/ChatInput")
+	
+	# Apply Metropolis font to chat input if available
+	if chat_input and metropolis_font:
+		chat_input.add_theme_font_override("font", metropolis_font)
+		chat_input.add_theme_font_size_override("font_size", 14)
+	
+	# Connect input signals
+	if chat_input:
+		chat_input.text_submitted.connect(_on_chat_input_submitted)
+		chat_input.focus_exited.connect(_on_chat_input_focus_exited)
+	
+	visible = true  # Chat UI is always visible (background and messages fade)
+	
+	# Hide scrollbar by default (will show when chat is opened)
+	if message_scroll:
+		var scroll_bar = message_scroll.get_v_scroll_bar()
+		if scroll_bar:
+			scroll_bar.visible = false
+
+func _input(event):
+	# Toggle chat with ENTER key
+	if event is InputEventKey and event.pressed and event.keycode == KEY_ENTER:
+		if not chat_open:
+			_open_chat()
+		else:
+			_send_and_close_chat()
+		get_viewport().set_input_as_handled()
+
+func _open_chat():
+	chat_open = true
+	chat_input.visible = true
+	chat_input.text = ""
+	chat_input.grab_focus()
+	background.visible = true
+	
+	# Show scrollbar when chat is open
+	if message_scroll:
+		var scroll_bar = message_scroll.get_v_scroll_bar()
+		if scroll_bar:
+			scroll_bar.visible = true
+	
+	# Make all messages fully visible when chat is opened
+	_show_all_messages()
+	
+	# Lock player controls
+	_lock_player_controls(true)
+	
+	# Scroll to bottom
+	call_deferred("_scroll_to_bottom")
+
+func _send_and_close_chat():
+	var message_text = chat_input.text.strip_edges()
+	chat_input.text = ""
+	chat_open = false
+	chat_input.visible = false
+	chat_input.release_focus()
+	
+	# Hide scrollbar when chat is closed
+	if message_scroll:
+		var scroll_bar = message_scroll.get_v_scroll_bar()
+		if scroll_bar:
+			scroll_bar.visible = false
+	
+	# Unlock player controls
+	_lock_player_controls(false)
+	
+	# Send message if not empty
+	if message_text.length() > 0:
+		_send_message(message_text)
+	
+	# Update background visibility
+	_update_background_visibility()
+
+func _on_chat_input_submitted(text: String):
+	_send_and_close_chat()
+
+func _on_chat_input_focus_exited():
+	# Don't close chat on focus loss - only close when ENTER is pressed
+	pass
+
+func send_system_message(message: String):
+	# Send a system message (appears as "System" instead of player name)
+	# System messages are always sent from server
+	if multiplayer.has_multiplayer_peer():
+		if multiplayer.is_server():
+			# Server broadcasts to all clients and also shows locally
+			_add_message("System", message)  # Show locally first
+			_receive_message.rpc("System", message)  # Broadcast to clients
+		else:
+			# Client sends to server (system messages should only come from server)
+			pass
+	else:
+		# Offline mode - just show locally
+		_add_message("System", message)
+
+func _send_message(message: String):
+	if not network_manager:
+		return
+	
+	# Get player name
+	var player_name = _get_player_name()
+	
+	# Send to server (or broadcast if we're the server)
+	if multiplayer.has_multiplayer_peer():
+		if multiplayer.is_server():
+			# Server broadcasts to all clients and also shows locally
+			_add_message(player_name, message)  # Show locally first
+			_receive_message.rpc(player_name, message)  # Broadcast to clients
+		else:
+			# Client sends to server
+			_send_message_to_server.rpc_id(1, player_name, message)
+	else:
+		# Offline mode - just show locally
+		_add_message(player_name, message)
+
+@rpc("any_peer", "reliable")
+func _send_message_to_server(player_name: String, message: String):
+	# Server receives message from client and broadcasts to all
+	if multiplayer.is_server():
+		# Show message on server first
+		_add_message(player_name, message)
+		# Then broadcast to all clients
+		_receive_message.rpc(player_name, message)
+
+@rpc("authority", "reliable")
+func _receive_message(player_name: String, message: String):
+	# All clients (and server) receive the message
+	_add_message(player_name, message)
+
+func _get_player_color(player_name: String) -> Color:
+	# System messages use gray color
+	if player_name == "System":
+		return Color.GRAY
+	
+	# Extract peer_id from player name (format: "PlayerX_Y" or "PlayerX")
+	var peer_id = 0
+	if player_name.begins_with("Player"):
+		var parts = player_name.substr(6).split("_")  # Remove "Player" prefix
+		if parts.size() > 0:
+			var peer_str = parts[0]
+			if peer_str.is_valid_int():
+				peer_id = peer_str.to_int()
+	
+	# Use peer_id to consistently assign colors
+	return player_colors[peer_id % player_colors.size()]
+
+func _add_message(player_name: String, message: String):
+	if not message_list:
+		print("ChatUI: ERROR - message_list is null, cannot add message!")
+		return
+	
+	# Get current time
+	var time_dict = Time.get_time_dict_from_system()
+	var timestamp = "%02d:%02d:%02d" % [time_dict.hour, time_dict.minute, time_dict.second]
+	var current_time = Time.get_ticks_msec() / 1000.0
+	
+	# Add to messages array
+	messages.append({
+		"timestamp": timestamp,
+		"player_name": player_name,
+		"message": message,
+		"time": current_time
+	})
+	
+	# Limit message history
+	if messages.size() > MAX_MESSAGES:
+		messages.pop_front()
+	
+	# Get player color
+	var player_color = _get_player_color(player_name)
+	var color_hex = "#%02x%02x%02x" % [int(player_color.r * 255), int(player_color.g * 255), int(player_color.b * 255)]
+	
+	# Create message label using RichTextLabel for colored text
+	var message_label = RichTextLabel.new()
+	message_label.name = "Message_%d" % messages.size()
+	message_label.bbcode_enabled = true
+	message_label.scroll_active = false
+	message_label.fit_content = true
+	message_label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+	message_label.clip_contents = false
+	
+	# Format message with colored player name using BBCode
+	var formatted_text = "%s [color=%s]%s[/color]: %s" % [timestamp, color_hex, player_name, message]
+	message_label.text = formatted_text
+	
+	# Apply Metropolis font if available
+	if metropolis_font:
+		message_label.add_theme_font_override("normal_font", metropolis_font)
+		message_label.add_theme_font_size_override("normal_font_size", 12)
+	
+	message_label.modulate.a = 1.0
+	
+	# Add to message list (at the end, so newest messages appear closest to input)
+	# Messages flow upwards - oldest at top, newest at bottom
+	message_list.add_child(message_label)
+	
+	# Scroll to bottom
+	call_deferred("_scroll_to_bottom")
+	
+	# Update background visibility
+	_update_background_visibility()
+
+func _scroll_to_bottom():
+	if message_scroll:
+		await get_tree().process_frame  # Wait for layout to update
+		var scroll_bar = message_scroll.get_v_scroll_bar()
+		if scroll_bar:
+			message_scroll.scroll_vertical = int(scroll_bar.max_value)
+
+func _update_background_visibility():
+	if not background:
+		return
+	
+	var current_time = Time.get_ticks_msec() / 1000.0
+	var has_recent_message = false
+	
+	# Check if there are any recent messages
+	for msg in messages:
+		var age = current_time - msg.time
+		if age < RECENT_MESSAGE_TIME:
+			has_recent_message = true
+			break
+	
+	# Show background if chat is open OR if there are recent messages
+	background.visible = chat_open or has_recent_message
+	
+	# Update message fade (only when chat is closed)
+	if not chat_open:
+		_update_message_fades()
+
+func _show_all_messages():
+	# Make all messages fully visible (used when chat is opened)
+	if not message_list:
+		return
+	
+	var message_labels = []
+	for child in message_list.get_children():
+		if child is RichTextLabel:
+			message_labels.append(child)
+	
+	for label in message_labels:
+		label.modulate.a = 1.0
+
+func _update_message_fades():
+	if not message_list:
+		return
+	
+	# Don't fade messages when chat is open - they should all be visible
+	if chat_open:
+		return
+	
+	var current_time = Time.get_ticks_msec() / 1000.0
+	
+	# Update fade for each message label
+	# Messages are in chronological order (oldest first, newest last)
+	var message_labels = []
+	for child in message_list.get_children():
+		if child is RichTextLabel:
+			message_labels.append(child)
+	
+	# Match labels to messages (same order - oldest first, newest last)
+	for i in range(min(messages.size(), message_labels.size())):
+		var msg = messages[i]
+		var label = message_labels[i]
+		var age = current_time - msg.time
+		
+		if age > MESSAGE_FADE_TIME:
+			# Start fading
+			var fade_progress = (age - MESSAGE_FADE_TIME) / MESSAGE_FADE_DURATION
+			label.modulate.a = max(0.0, 1.0 - fade_progress)
+		else:
+			# Fully visible
+			label.modulate.a = 1.0
+
+func _process(_delta):
+	# Update message fades and background visibility
+	if not chat_open:
+		_update_background_visibility()
+		_update_message_fades()
+
+func _get_player_name() -> String:
+	# Get local player name
+	var game_world = get_tree().get_first_node_in_group("game_world")
+	if game_world:
+		var player_manager = game_world.get_node_or_null("PlayerManager")
+		if player_manager:
+			var local_players = player_manager.get_local_players()
+			if local_players.size() > 0:
+				var player = local_players[0]
+				# peer_id and local_player_index are always defined in player.gd
+				return "Player%d_%d" % [player.peer_id, player.local_player_index + 1]
+	
+	# Fallback
+	if multiplayer.has_multiplayer_peer():
+		return "Player%d" % multiplayer.get_unique_id()
+	return "Player"
+
+func _lock_player_controls(lock: bool):
+	# Lock/unlock controls for all local players
+	var game_world = get_tree().get_first_node_in_group("game_world")
+	if game_world:
+		var player_manager = game_world.get_node_or_null("PlayerManager")
+		if player_manager:
+			var local_players = player_manager.get_local_players()
+			for player in local_players:
+				# controls_disabled is a property in player.gd, so we can set it directly
+				player.controls_disabled = lock

src/scripts/chat_ui.gd.uid

@@ -0,0 +1 @@
+uid://dxglerf7e7p5j

src/scripts/game_world.gd

@@ -36,6 +36,9 @@ func _ready():
 		network_manager.player_connected.connect(_on_player_connected)
 		network_manager.player_disconnected.connect(_on_player_disconnected)
 	
+	# Create chat UI
+	_create_chat_ui()
+	
 	# Generate dungeon on host
 	if multiplayer.is_server() or not multiplayer.has_multiplayer_peer():
 		print("GameWorld: _ready() - Will generate dungeon (is_server: ", multiplayer.is_server(), ", has_peer: ", multiplayer.has_multiplayer_peer(), ")")
@@ -59,6 +62,10 @@ func _spawn_all_players():
 func _on_player_connected(peer_id: int, player_info: Dictionary):
 	print("GameWorld: Player connected signal received for peer ", peer_id, " with info: ", player_info)
 	
+	# Send join message to chat (only on server to avoid duplicates)
+	if multiplayer.is_server():
+		_send_player_join_message(peer_id, player_info)
+	
 	# Reset ready status for this peer (they need to notify again after spawning)
 	if multiplayer.is_server():
 		clients_ready[peer_id] = false
@@ -139,8 +146,13 @@ func _sync_existing_enemies_to_client(client_peer_id: int):
 			_sync_enemy_spawn.rpc_id(client_peer_id, spawner.name, pos, scene_index, humanoid_type)
 			print("GameWorld: Sent enemy spawn sync to client ", client_peer_id, ": spawner=", spawner.name, " pos=", pos, " scene_index=", scene_index, " humanoid_type=", humanoid_type)
 
-func _on_player_disconnected(peer_id: int):
+func _on_player_disconnected(peer_id: int, player_info: Dictionary):
 	print("GameWorld: Player disconnected - ", peer_id)
+	
+	# Send disconnect message to chat (only on server to avoid duplicates)
+	if multiplayer.is_server():
+		_send_player_disconnect_message(peer_id, player_info)
+	
 	player_manager.despawn_players_for_peer(peer_id)
 
 @rpc("authority", "reliable")
@@ -2030,6 +2042,60 @@ func _initialize_hud():
 	else:
 		print("GameWorld: HUD not found or not ready - this is OK if HUD scene is missing")
 
+func _create_chat_ui():
+	# Load chat UI scene
+	var chat_ui_scene = load("res://scenes/chat_ui.tscn")
+	if not chat_ui_scene:
+		push_error("GameWorld: Could not load chat_ui.tscn scene!")
+		return
+	
+	var chat_ui = chat_ui_scene.instantiate()
+	if chat_ui:
+		add_child(chat_ui)
+		print("GameWorld: Chat UI scene instantiated and added to scene tree")
+	else:
+		push_error("GameWorld: Failed to instantiate chat_ui.tscn!")
+
+func _send_player_join_message(peer_id: int, player_info: Dictionary):
+	# Send a chat message when a player joins
+	# Only send from server to avoid duplicate messages
+	if not multiplayer.is_server():
+		return
+	
+	# Get player name (use first player name from the player_info)
+	var player_names = player_info.get("player_names", [])
+	var player_name = ""
+	if player_names.size() > 0:
+		player_name = player_names[0]
+	else:
+		player_name = "Player%d" % peer_id
+	
+	# Get chat UI
+	var chat_ui = get_node_or_null("ChatUI")
+	if chat_ui and chat_ui.has_method("send_system_message"):
+		var message = "%s joined the game" % player_name
+		chat_ui.send_system_message(message)
+
+func _send_player_disconnect_message(peer_id: int, player_info: Dictionary):
+	# Send a chat message when a player disconnects
+	# Only send from server to avoid duplicate messages
+	if not multiplayer.is_server():
+		return
+	
+	# Get player name from player_info
+	var player_name = ""
+	var player_names = player_info.get("player_names", [])
+	if player_names.size() > 0:
+		player_name = player_names[0]
+	else:
+		player_name = "Player%d" % peer_id
+	
+	# Get chat UI
+	var chat_ui = get_node_or_null("ChatUI")
+	if chat_ui and chat_ui.has_method("send_system_message"):
+		var message = "%s left/disconnected" % player_name
+		chat_ui.send_system_message(message)
+
 func _create_level_complete_ui_programmatically() -> Node:
 	# Create level complete UI programmatically
 	var canvas_layer = CanvasLayer.new()

src/scripts/network_manager.gd

@@ -4,7 +4,7 @@ extends Node
 # Supports both hosting and joining games
 
 signal player_connected(peer_id, player_info)
-signal player_disconnected(peer_id)
+signal player_disconnected(peer_id, player_info)
 signal connection_failed()
 signal connection_succeeded()
 
@@ -82,9 +82,12 @@ func _on_peer_connected(id: int):
 # Called when a peer disconnects
 func _on_peer_disconnected(id: int):
 	print("Peer disconnected: ", id)
+	# Get player_info before erasing it
+	var player_info = {}
 	if players_info.has(id):
+		player_info = players_info[id]
 		players_info.erase(id)
-	player_disconnected.emit(id)
+	player_disconnected.emit(id, player_info)
 
 # Called on client when successfully connected to server
 func _on_connected_to_server():