using Chickensoft.AutoInject;
using Chickensoft.Introspection;
using Godot;
using System;
using System.Threading.Tasks;
using Zennysoft.Game.Abstractions;

namespace Zennysoft.Game.Ma;

[Meta(typeof(IAutoNode))]
public partial class NavigationAgentClient : Node3D, INavigationAgentClient
{
  public override void _Notification(int what) => this.Notify(what);

  [Node] private NavigationAgent3D NavAgent { get; set; } = default!;

  [Node] private Timer _patrolTimer { get; set; } = default!;

  private Vector3 _currentTarget = Vector3.Zero;
  private Timer _thinkTimer;
  private bool _canMove = false;

  public void Setup()
  {
    NavAgent.VelocityComputed += NavAgent_VelocityComputed;
    NavAgent.TargetReached += NavAgent_TargetReached;

    var rng = new RandomNumberGenerator();
    rng.Randomize();
    _patrolTimer.Timeout += OnPatrolTimeout;
    _patrolTimer.WaitTime = rng.RandfRange(7.0f, 15.0f);

    _thinkTimer = new Timer
    {
      WaitTime = 0.4f
    };
    AddChild(_thinkTimer);
    _thinkTimer.Timeout += NavAgent_TargetReached;
    _thinkTimer.Start();
  }

  public void Stop()
  {
    _patrolTimer.Stop();
    _thinkTimer.Stop();
  }

  private void NavAgent_VelocityComputed(Vector3 safeVelocity)
  {
    if (!_canMove)
      return;

    var enemy = GetOwner() as IEnemy;
    enemy.Move(safeVelocity);
  }

  public void CalculateVelocity(Vector3 currentPosition, bool canMove)
  {
    _canMove = canMove;
    var nextPathPosition = NavAgent.GetNextPathPosition();

    var newVelocity = currentPosition.DirectionTo(nextPathPosition) * 2f;
    NavAgent.Velocity = newVelocity;
  }
  public void SetTarget(Vector3 target) => Task.Delay(TimeSpan.FromSeconds(0.4)).ContinueWith(_ => _currentTarget = new Vector3(target.X, -1.75f, target.Z));

  public bool IsAvoidanceEnabled => NavAgent.AvoidanceEnabled;


  private void NavAgent_TargetReached()
  {
    NavAgent.TargetPosition = _currentTarget;
  }

  private void OnPatrolTimeout()
  {
    var rng = new RandomNumberGenerator();
    rng.Randomize();
    _patrolTimer.WaitTime = rng.RandfRange(5.0f, 10.0f);
    var enemy = GetOwner() as ICanPatrol;
    enemy.Patrol();
  }
}