using Godot;

namespace Newlon.Components;

[GlobalClass]
public partial class Armor : Node
{
	[Signal]
	public delegate void DamagedEventHandler();
	[Signal]
	public delegate void HpChangedEventHandler(float hp);
	[Signal]
	public delegate void ArmorLostEventHandler();

	[Export]
	public float MaxHP { get; private set; }
	public float _hp;
	private bool _lost = false;

    public override void _Ready()
    {
        _hp = MaxHP;
    }

	public float RecieveDamage(float damage)
	{
		if(_lost)
			return damage;
		
		float returnAmount = damage - _hp;
		if (returnAmount < 0)
			returnAmount = 0;
		if (_hp - damage <= 0)
			{
				var delta = _hp;
				_hp = 0;
				EmitSignal(SignalName.HpChanged, -delta);
				EmitSignal(SignalName.Damaged);
				EmitSignal(SignalName.ArmorLost);
				_lost = true;
			}
			else
			{
				_hp -= damage;
				EmitSignal(SignalName.HpChanged, -damage);
				EmitSignal(SignalName.Damaged);
			}
		return returnAmount;
	}

	public float Heal(float amount)
	{
		if(_lost)
			return amount;
		float returnAmount = 0;
		_hp += amount;
		if (_hp >= MaxHP)
		{
			returnAmount = _hp-MaxHP;
			_hp = MaxHP;
		}
		EmitSignal(SignalName.HpChanged,_hp);
		return returnAmount;
	}
}