extends CanvasLayer
## HUD Manager - Main UI controller for the WoW-style interface
## This autoload manages all UI components and connects to the local player

# UI Component references
var action_bar: Control = null
var unit_frame: Control = null
var target_frame: Control = null
var character_sheet: Control = null
var tab_hint: Control = null

# Player reference
var local_player: Character = null

func _ready():
	# Create main HUD container
	name = "HUD"
	layer = 100  # Ensure UI is above game world

	print("[HUD] HUD Manager initialized")

## Set the local player and connect signals
func set_local_player(player: Character):
	if local_player:
		_disconnect_player_signals()

	local_player = player

	if not local_player:
		return

	print("[HUD] Local player set: ", local_player.name)
	_connect_player_signals()
	_create_ui_components()

## Connect to player signals
func _connect_player_signals():
	if not local_player:
		return

	# Health signals (from BaseUnit)
	local_player.health_changed.connect(_on_player_health_changed)
	local_player.died.connect(_on_player_died)
	local_player.respawned.connect(_on_player_respawned)

	# Ability/weapon signals
	local_player.dash_cooldown_updated.connect(_on_dash_cooldown_updated)
	local_player.attack_cooldown_updated.connect(_on_attack_cooldown_updated)
	local_player.weapon_equipped_changed.connect(_on_weapon_changed)

	print("[HUD] Connected to player signals")

## Disconnect from player signals
func _disconnect_player_signals():
	if not local_player:
		return

	if local_player.health_changed.is_connected(_on_player_health_changed):
		local_player.health_changed.disconnect(_on_player_health_changed)
	if local_player.died.is_connected(_on_player_died):
		local_player.died.disconnect(_on_player_died)
	if local_player.respawned.is_connected(_on_player_respawned):
		local_player.respawned.disconnect(_on_player_respawned)
	if local_player.dash_cooldown_updated.is_connected(_on_dash_cooldown_updated):
		local_player.dash_cooldown_updated.disconnect(_on_dash_cooldown_updated)
	if local_player.attack_cooldown_updated.is_connected(_on_attack_cooldown_updated):
		local_player.attack_cooldown_updated.disconnect(_on_attack_cooldown_updated)
	if local_player.weapon_equipped_changed.is_connected(_on_weapon_changed):
		local_player.weapon_equipped_changed.disconnect(_on_weapon_changed)

## Create all UI components
func _create_ui_components():
	print("[HUD] Creating UI components...")

	_create_action_bar()
	_create_unit_frame()
	_create_character_sheet()
	_create_tab_hint()

## Create action bar at bottom of screen
func _create_action_bar():
	var action_bar_scene = load("res://level/ui/scenes/action_bar.tscn")
	if action_bar_scene:
		action_bar = action_bar_scene.instantiate()
		add_child(action_bar)
		if action_bar and local_player:
			action_bar.set_player(local_player)
		print("[HUD] Action bar created")
	else:
		push_error("[HUD] Failed to load action_bar.tscn")

## Create unit frame (character portrait)
func _create_unit_frame():
	var unit_frame_scene = load("res://level/ui/scenes/unit_frame.tscn")
	if unit_frame_scene:
		unit_frame = unit_frame_scene.instantiate()
		add_child(unit_frame)
		if unit_frame and local_player:
			unit_frame.set_player(local_player)
		print("[HUD] Unit frame created")
	else:
		push_error("[HUD] Failed to load unit_frame.tscn")

## Create character sheet (toggle with Tab)
func _create_character_sheet():
	var character_sheet_scene = load("res://level/ui/scenes/character_sheet.tscn")
	if character_sheet_scene:
		character_sheet = character_sheet_scene.instantiate()
		add_child(character_sheet)
		if character_sheet and local_player:
			character_sheet.set_player(local_player)
		print("[HUD] Character sheet created")
	else:
		push_error("[HUD] Failed to load character_sheet.tscn")

## Create Tab hint (always visible on left side)
func _create_tab_hint():
	var tab_hint_scene = load("res://level/ui/scenes/tab_hint.tscn")
	if tab_hint_scene:
		tab_hint = tab_hint_scene.instantiate()
		add_child(tab_hint)
		print("[HUD] Tab hint created")
	else:
		push_error("[HUD] Failed to load tab_hint.tscn")

## Show all UI components
func show_hud():
	show()

## Hide all UI components
func hide_hud():
	hide()

## Player signal callbacks
func _on_player_health_changed(old_health: float, new_health: float):
	# Update unit frame
	if unit_frame:
		unit_frame.update_health(new_health, local_player.max_health)

func _on_player_died(killer_id: int):
	print("[HUD] Player died")
	# Could show death screen or respawn timer here

func _on_player_respawned():
	print("[HUD] Player respawned")
	# Refresh all UI elements
	if local_player:
		_on_player_health_changed(0, local_player.current_health)

## Cooldown signal handlers
func _on_dash_cooldown_updated(remaining: float, total: float):
	if action_bar:
		action_bar.update_dash_cooldown(remaining, total)

func _on_attack_cooldown_updated(remaining: float, total: float):
	if action_bar:
		action_bar.update_attack_cooldown(remaining, total)

func _on_weapon_changed():
	if action_bar:
		action_bar.on_weapon_changed()