extends Control

@export var health_bar: TextureProgressBar
@export var stamina_bar: TextureProgressBar
@export var gold_label: Label

@onready var player: Player = get_tree().get_first_node_in_group("player")
@onready var crosshair: BoxContainer = $CrossHair
const GOLD_LABEL_PREFIX := "Gold: "
var unit: Unit


func _ready() -> void:
	# Connect signals from the player to update the UI elements
	player.health_changed.connect(update_health_bar)
	player.stamina_changed.connect(update_stamina_bar)
	player.gold_changed.connect(update_gold_text)
	player.player_loaded.connect(_on_player_loaded)
	# Connect the state_changed signal to update the crosshair visibility
	unit = player as Unit
	if unit:
		unit.state_changed.connect(_on_state_changed)


func update_health_bar(current_health: int, maximum_health: int) -> void:
	# Update the health bar with the current health
	_set_progress(health_bar, current_health, maximum_health)


func update_stamina_bar(current_stamina: int, maximum_stamina: int) -> void:
	# Update the stamina bar with the current stamina
	_set_progress(stamina_bar, current_stamina, maximum_stamina)


func update_gold_text(gold: int) -> void:
	# Update the gold label with the current gold amount
	gold_label.text = "%s%d" % [GOLD_LABEL_PREFIX, gold]


func _on_player_loaded() -> void:
	# Initialize the health, stamina, and gold bars when the player is loaded
	update_health_bar(player.health, player.maximum_health)
	update_stamina_bar(player.stamina, player.maximum_stamina)
	update_gold_text(player.gold)


func _on_state_changed(_old_state: Unit.States, new_state: Unit.States) -> void:
	# Update the crosshair visibility based on the new state
	crosshair.visible = (new_state == Unit.States.aiming)


func _set_progress(bar: TextureProgressBar, current: int, maximum: int) -> void:
	# Safeguard against division by zero and map to 0..100
	if maximum <= 0:
		bar.value = 0.0
		return
	bar.value = (100.0 * float(current)) / float(maximum)