class_name HealthComponent
extends Node

signal health_changed(current: int, maximum: int)
signal depleted

@export var maximum := 100
@export var current := 100


func _ready() -> void:
	_emit_changed()


func set_values(next_current: int, next_maximum: int) -> void:
	maximum = max(1, next_maximum)
	current = clampi(next_current, 0, maximum)
	_emit_changed()


func apply_damage(amount: int) -> void:
	if amount <= 0:
		return
	current = clampi(current - amount, 0, maximum)
	_emit_changed()
	if current == 0:
		depleted.emit()


func heal(amount: int) -> void:
	if amount <= 0:
		return
	current = clampi(current + amount, 0, maximum)
	_emit_changed()


func _emit_changed() -> void:
	health_changed.emit(current, maximum)
	_event_bus().emit_signal("player_health_changed", current, maximum)


func _event_bus() -> Node:
	var root := get_tree().root
	var bus := root.get_node_or_null("EventBus")
	if bus == null:
		bus = load("res://autoload/event_bus.gd").new()
		bus.name = "EventBus"
		root.add_child(bus)
	return bus