using UnityEngine;
using UnityEngine.Events;

[DisallowMultipleComponent]
[RequireComponent(typeof(Collider))]
public class TriggerEvents : MonoBehaviour
{
    [Header("Trigger Conditions")]
    [Tooltip("Only trigger once for all events")]
    public bool triggerOnce = true;
    [Tooltip("Destroy this GameObject after triggering")]
    public bool destroyAfterTrigger = false;
    [Tooltip("Stop player movement when triggered")]
    public bool stopPlayerMovement = true;
    [Tooltip("Tag required to trigger (leave empty to ignore)")]
    public string requiredTag = "Player";
    [Tooltip("Layer mask required to trigger")]
    public LayerMask requiredLayers = ~0;

    [Header("Events")]
    public UnityEvent onEnter;
    public UnityEvent onExit;
    public UnityEvent onStay;

    private bool hasTriggered = false;

    private void Reset()
    {
        Collider collider = GetComponent<Collider>();
        if (collider != null)
        {
            collider.isTrigger = true;
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (!CanTrigger(other)) return;

        hasTriggered = true;

        // Stop player movement if enabled
        if (stopPlayerMovement)
        {
            StopMovement(other.gameObject);
        }

        onEnter?.Invoke();

        if (destroyAfterTrigger)
        {
            Destroy(gameObject);
        }
    }

    private void OnTriggerExit(Collider other)
    {
        if (!CanTrigger(other)) return;
        onExit?.Invoke();
    }

    private void OnTriggerStay(Collider other)
    {
        if (!CanTrigger(other)) return;
        onStay?.Invoke();
    }

    private bool CanTrigger(Collider other)
    {
        if (other == null) return false;
        if (triggerOnce && hasTriggered) return false;

        if (!string.IsNullOrEmpty(requiredTag) && !other.CompareTag(requiredTag))
        {
            return false;
        }

        int otherLayerMask = 1 << other.gameObject.layer;
        if ((requiredLayers.value & otherLayerMask) == 0)
        {
            return false;
        }

        return true;
    }

    private void StopMovement(GameObject target)
    {
        if (target == null) return;

        // Try NavMeshMovementController first
        NavMeshMovementController movementController = target.GetComponent<NavMeshMovementController>();
        if (movementController != null)
        {
            movementController.Stop();
            return;
        }

        // Fallback to NavMeshAgent
        UnityEngine.AI.NavMeshAgent agent = target.GetComponent<UnityEngine.AI.NavMeshAgent>();
        if (agent != null)
        {
            agent.isStopped = true;
            agent.ResetPath();
        }
    }
}