using Godot;
using System;

public partial class Boss : CharacterBody2D
{
	[Signal]
	public delegate void KilledEventHandler();
	
	[Export] public int MaxHp = 6;

	public enum State
	{
		Default,
		Injured
	}
	
	private AnimatedSprite2D _sprite;
	private State _state = State.Default; 
	private int _currentHp;
	private float _injureTimeout = Constants.BossInjureTimeout;
	// Called when the node enters the scene tree for the first time.
	public override void _Ready()
	{
		_sprite = (AnimatedSprite2D)FindChild("AnimatedSprite2D");
		_currentHp = MaxHp;
	}

	// Called every frame. 'delta' is the elapsed time since the previous frame.
	public override void _Process(double delta)
	{
	}

	public override void _PhysicsProcess(double delta)
	{
		_injureTimeout -= (float)delta;
		switch (_state)
		{
			case State.Default:
				_sprite.Play("default");
				break;
			case State.Injured:
				_sprite.Play("injured");
				if (_injureTimeout < 0)
				{
					_state = State.Default;
				}
				break;
		}
		if (_currentHp <= 0)
		{
			EmitSignal(SignalName.Killed);
		}
	}


	private void _OnAttack(Node2D body)
	{
		if (body is LivingArmor armor)
		{
			_currentHp -= 1;
			_state = State.Injured;
			_injureTimeout = Constants.BossInjureTimeout;
			armor.Kill(this);
			if (_currentHp <= 0)
				GD.Print($"{this.Name} was killed.");
		}
	}
}