using Chickensoft.AutoInject;
using Chickensoft.Introspection;
using Godot;
using Zennysoft.Ma.Adapter;

namespace Zennysoft.Game.Ma;

[Meta(typeof(IAutoNode))]
public abstract partial class Enemy2D : Enemy
{
  public override void _Notification(int what) => this.Notify(what);

  [Node] private Area3D LineOfSight { get; set; } = default!;

  public override IEnemyModelView EnemyModelView => _enemyModelView;

  [Node] private EnemyModelView2D _enemyModelView { get; set; } = default!;

  private Vector3 _previousPosition = Vector3.Zero;

  public void OnEnterTree()
  {
    LineOfSight.BodyEntered += LineOfSight_BodyEntered;
  }

  public override void _PhysicsProcess(double delta)
  {
    _enemyModelView.SetCurrentDirection(GlobalBasis, -_player.GlobalBasis.Z);
  }

  public override void _Process(double delta)
  {
    if (_enemyLogic.Value is EnemyLogic.State.FollowPlayer || _enemyLogic.Value is EnemyLogic.State.Patrolling)
    {
      var velocity = (GlobalPosition - _previousPosition) / (float)delta;
      if (velocity.IsZeroApprox())
        _enemyLogic.Input(new EnemyLogic.Input.Idle());
      else
        _enemyLogic.Input(new EnemyLogic.Input.Move());
      _previousPosition = GlobalPosition;
    }
  }

  protected void PlayerDetector_BodyEntered(Node3D node)
  {
    if (node is IPlayer)
      _enemyLogic.Input(new EnemyLogic.Input.ReachedPlayer());
  }

  protected void PlayerDetector_BodyExited(Node3D node)
  {
    if (node is IPlayer)
      _enemyLogic.Input(new EnemyLogic.Input.Follow());
  }

  protected void OnVelocityComputed(Vector3 safeVelocity)
  {
    Velocity = safeVelocity;
    LookAtTarget(safeVelocity);
    MoveAndSlide();
  }

  protected void EngagePlayerBehavior_TakeAction() => PerformAction();

  protected void EngagePlayerBehavior_AcquireTarget() => LookAt(new Vector3(_player.GlobalPosition.X, GlobalPosition.Y, _player.GlobalPosition.Z), Vector3.Up, true);

  private void LineOfSight_BodyEntered(Node3D body)
  {
    if (body is IPlayer)
      _enemyLogic.Input(new EnemyLogic.Input.Alert());
  }
}