using Godot;
using System;

public partial class Spikes : Area2D
{
	public enum State
	{
		Waiting,
		Opening,
		Closing
	}

	[Export] public bool Enabled = false;
	[Export] public float SpikesTimeout = 1f;
	[Export] public float StartOffset = 0f;
	private AnimatedSprite2D _sprite;
	private State _state = State.Waiting;
	private float _timeSinceState;
	
	
	// Called when the node enters the scene tree for the first time.
	public override void _Ready()
	{
		_sprite = (AnimatedSprite2D)FindChild("AnimatedSprite2D");
		_timeSinceState -= StartOffset;
	}

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

	public override void _PhysicsProcess(double delta)
	{
		if (Enabled)
		{
			switch (_state)
			{
				case State.Waiting:
					_sprite.Stop();
					_timeSinceState += (float)delta;
					if (_timeSinceState > SpikesTimeout)
					{
						_state = State.Opening;
						_timeSinceState = 0;
					} 
					break;
				case State.Opening:
					_sprite.Play("default");
					break;
				case State.Closing:
					_sprite.PlayBackwards("default");
					break;
			}
		}

	}

	private void _OnEntered(Node2D body)
	{
		if (_state is State.Waiting)
			return;
		switch (body)
		{
			case Wretched wretched:
				wretched.Kill(this);
				break;
			case Player player:
				player.Kill(this);
				break;
			default:
				return;
		}
	}


	private void _OnExited(Node2D body)
	{
		// Replace with function body.
	}
	
	private void _WhenOpened()
	{
		switch (_state)
		{
			case State.Waiting:
				break;
			case State.Opening:
				_state = State.Closing;
				break;
			case State.Closing:
				_state = State.Waiting;
				break;

		}
	}
	
	private void On()
	{
		Enabled = true;
		_timeSinceState = -StartOffset;
	}
	
	private void Off()
	{
		_sprite.Stop();
		Enabled = false;
		_state = State.Waiting;
	}
	
}