using Chickensoft.AutoInject;
using Chickensoft.Introspection;
using Godot;
using System;

[Meta(typeof(IAutoNode))]
public partial class ShakeCamera : Camera3D
{
  public override void _Notification(int what) => this.Notify(what);

  [Export] private double _shakeIntensity = 1.0;

  [Export] private double _maxX = 10;
  [Export] private double _maxY = 10;
  [Export] private double _maxZ = 5;

  [Export] private FastNoiseLite _noise;
  [Export] private double _noiseSpeed = 50.0;

  private double _shake = 0.0;
  private double _time = 0.0;

  private Vector3 _initialRotation;

  public override void _Ready()
  {
	_initialRotation = RotationDegrees;
  }

  public override void _Process(double delta)
  {
	_time += delta;
	_shake = Mathf.Max(_shake - delta * _shakeIntensity, 0.0);

	RotationDegrees = new Vector3(
	  (float)(_initialRotation.X + _maxX * Mathf.Pow(_shake, 2) * GetNoiseFromSeed(0)),
	  (float)(_initialRotation.Y + _maxY * Mathf.Pow(_shake, 2) * GetNoiseFromSeed(1)),
	  (float)(_initialRotation.Z + _maxZ * Mathf.Pow(_shake, 2) * GetNoiseFromSeed(2)));
  }

  public void AddShake(float shakeAmount)
  {
	_shake = Mathf.Clamp(_shake + shakeAmount, 0.0, 1.0);
  }

  private double GetNoiseFromSeed(int seed)
  {
	_noise.Seed = seed;
	return _noise.GetNoise1D((float)(_time * _noiseSpeed));
  }
}