using UnityEngine;
using UnityEngine.XR.WSA.Persistence;
using UnityEngine.XR.WSA;

 // Make sure you have the following Scripts in in your Scene: SpatialMappingObserver, SpatialMappingManager

public class PersistantAnchorExample : MonoBehaviour
{
    public WorldAnchorStore anchorStore;
    public GameObject AnchorRepresentation; // You have to set this to the Prefab you want

    void Start()
    {
        WorldAnchorStore.GetAsync(AnchorstoreReady); // On Start Load the Anchorstore
    }

    private GameObject InstantiateObject()
    {
        GameObject NewAnchorRepresentation = UnityEngine.Object.Instantiate(AnchorRepresentation);
        NewAnchorRepresentation.transform.position = Camera.main.transform.position + Camera.main.transform.forward;
        return NewAnchorRepresentation;
    }

    // Call this Function to Create a new Object with Anchor (For example from Voice Recognition)
    public void CreateObjectWithAnchor()
    {
        GameObject NewAnchorRepresentation = InstantiateObject();
        WorldAnchor newAnchor = NewAnchorRepresentation.AddComponent<WorldAnchor>();
        string AnchorID = "Anchor" + UnityEngine.Random.Range(10000, 99999).ToString(); //Generate a random name for the Anchor
        bool savedAnchor = false;
        try
        {
            savedAnchor = anchorStore.Save(AnchorID, newAnchor); // Now the Anchor is saved across multiple sessions
        }
        catch (System.Exception e)
        {
            Debug.Log(e);
            Debug.Log("Error Saving the Anchor");
        }
        if (!savedAnchor)
        {
            Debug.Log("Anchor failed to save to the store.");
        }
    }

    private void LoadAllAnchors()
    {
        if (anchorStore.anchorCount > 0)
        {
            string[] anchorIDs = anchorStore.GetAllIds();
            foreach (string anchorID in anchorIDs)
            {
                Debug.Log("Load " + anchorID);
                GameObject NewAnchorRepresentation = UnityEngine.Object.Instantiate(AnchorRepresentation);
                anchorStore.Load(anchorID, NewAnchorRepresentation); // This automatically sets the position of the object to the right position in the room
            }
        }
        else
        {
            Debug.Log("Anchor Store is empty");
        }
    }

    // Callback from WorldAnchorStore.GetAsync
    private void AnchorstoreReady(WorldAnchorStore store)
    {
        anchorStore = store;
        LoadAllAnchors();
    }
}