using UnityEngine;
using UnityEngine.XR.Interaction.Toolkit;
using UnityEngine.XR.Interaction.Toolkit.Interactables;

public class XRInteractionEventLogger : MonoBehaviour
{
    private XRBaseInteractable interactable;

    private void Awake() => interactable = GetComponent<XRBaseInteractable>();

    private void OnEnable()
    {
        if (interactable == null)
        {
            Debug.LogError(
                $"XRInteractionEventLogger on '{gameObject.name}' needs an XRI interactable " +
                "(for example, XR Grab Interactable or XR Simple Interactable) on the same GameObject. " +
                "Disabling this logger.", this);
            enabled = false;
            return;
        }

        interactable.hoverEntered.AddListener(OnHoverEntered);
        interactable.hoverExited.AddListener(OnHoverExited);
        interactable.selectEntered.AddListener(OnSelectEntered);
        interactable.selectExited.AddListener(OnSelectExited);
        interactable.activated.AddListener(OnActivated);
        interactable.deactivated.AddListener(OnDeactivated);
    }

    private void OnDisable()
    {
        if (interactable == null)
            return;

        interactable.hoverEntered.RemoveListener(OnHoverEntered);
        interactable.hoverExited.RemoveListener(OnHoverExited);
        interactable.selectEntered.RemoveListener(OnSelectEntered);
        interactable.selectExited.RemoveListener(OnSelectExited);
        interactable.activated.RemoveListener(OnActivated);
        interactable.deactivated.RemoveListener(OnDeactivated);
    }

    private void OnHoverEntered(HoverEnterEventArgs args) => Log("hover_enter", NameOf(args.interactorObject));
    private void OnHoverExited(HoverExitEventArgs args) => Log("hover_exit", NameOf(args.interactorObject));
    private void OnSelectEntered(SelectEnterEventArgs args) => Log("select_enter", NameOf(args.interactorObject));
    private void OnSelectExited(SelectExitEventArgs args) => Log("select_exit", NameOf(args.interactorObject));
    private void OnActivated(ActivateEventArgs args) => Log("activate", NameOf(args.interactorObject));
    private void OnDeactivated(DeactivateEventArgs args) => Log("deactivate", NameOf(args.interactorObject));

    private void Log(string eventType, string interactorName)
    {
        XRSessionLogger.Instance?.LogEvent(eventType, gameObject.name, interactorName);
    }

    private static string NameOf(object value)
    {
        if (value is Component component) return component.gameObject.name;
        return value != null ? value.ToString() : "unknown";
    }
}