using UnityEngine;
using TMPro;
using UnityEngine.Events;

public class DestinationObject : MonoBehaviour
{
    public Transform player;
    public Transform nextDestinationPoint; // Single next destination point
    public AudioClip destinationSound;
    public float distanceThreshold = 1f;
    public TextMeshPro textMeshPro;

    // Use UnityEvent directly
    [System.Serializable]
    public class DestinationEvent : UnityEvent { }

    public DestinationEvent onDestinationStart;
    public DestinationEvent onDestinationEnd;

    private AudioSource audioSource;
    private bool destinationReached = false;

    void Start()
    {
        InitializeAudioSource();
    }

    void Update()
    {
        float distance = Vector3.Distance(player.position, transform.position);
        UpdateTextContent(distance);

        if (distance < distanceThreshold && !destinationReached)
        {
            HandleDestinationReached();
        }

        transform.LookAt(transform.position + Camera.main.transform.rotation * Vector3.forward,
            Camera.main.transform.rotation * Vector3.up);
    }

    private void InitializeAudioSource()
    {
        audioSource = gameObject.AddComponent<AudioSource>();
        audioSource.clip = destinationSound;
    }

    private void UpdateTextContent(float distance)
    {
        if (textMeshPro != null)
        {
            float numericDistance = Mathf.Abs(distance);
            string distanceText = numericDistance.ToString("F2");
            textMeshPro.text = distanceText;
        }
    }

    private void HandleDestinationReached()
    {
        destinationReached = true;
        onDestinationStart.Invoke();

        Debug.Log("Destination Reached!");

        if (audioSource != null && destinationSound != null)
        {
            audioSource.PlayOneShot(destinationSound);
        }

        if (textMeshPro != null)
        {
            textMeshPro.enabled = false;
        }

        onDestinationEnd.Invoke();

        SetNextDestination();
    }

    private void SetNextDestination()
    {
        if (nextDestinationPoint != null)
        {
            transform.position = nextDestinationPoint.position;
            destinationReached = false;
            textMeshPro.enabled = true;
        }
        else
        {
            // If there is no next destination, destroy the object
            Destroy(gameObject);
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Player"))
        {
            onDestinationStart.Invoke();
        }
    }

    public void OnPlayerReached()
    {
        // Add logic to execute when the player reaches the destination
    }
}