class_name HealthComponent
extends Node

@export var health: float = 1.0
@export var max_health: float = 1.0

signal on_health_change(delta: float, total_health: float)
signal on_death

func _get_delta(value: float) -> float:
	var old_value = health
	return value - old_value

func set_health(new_value: float):
	var delta = _get_delta(new_value)
	
	if new_value >= max_health:
		health = max_health
		on_health_change.emit(delta, health)
		return
	
	health = new_value
	
	if health <= 0:
		on_death.emit()
		return
	
	on_health_change.emit(delta, health)

func decrease_health(value: float):
	var delta = _get_delta(value)
	
	health -= value
	
	if health <= 0:
		on_death.emit()
		return
		
	on_health_change.emit(delta, health)
	
func increase_health(value: float):
	var delta = _get_delta(value)
	
	health += value
	
	if health >= max_health:
		health = max_health
		on_health_change.emit(delta, health)
		return
	
	health += value
	on_health_change.emit(delta, health)