using UnityEngine;

[RequireComponent(typeof(Collider))]
public abstract class PickupItem : MonoBehaviour
{
    [Header("Hover & Rotation Animation")]
    [SerializeField] private float rotationSpeed = 90f;
    [SerializeField] private float bobFrequency = 2f;
    [SerializeField] private float bobAmplitude = 0.2f;

    [Header("Pickup Feedback")]
    [SerializeField] private GameObject pickupVFXPrefab;
    [SerializeField] private AudioClip pickupSFX;
    [SerializeField] private string pickupMessage = "Picked up item!";

    [Header("Respawn Settings")]
    [SerializeField] private bool respawns = false;
    [SerializeField] private float respawnTime = 15f;

    private Vector3 startPosition;
    private Collider itemCollider;
    private Renderer[] itemRenderers;
    private bool isCollected = false;

    protected virtual void Awake()
    {
        itemCollider = GetComponent<Collider>();
        itemCollider.isTrigger = true;
        itemRenderers = GetComponentsInChildren<Renderer>();
        startPosition = transform.position;
    }

    protected virtual void Update()
    {
        if (isCollected) return;

        // Rotate item
        transform.Rotate(Vector3.up, rotationSpeed * Time.deltaTime, Space.World);

        // Bob up and down
        float newY = startPosition.y + Mathf.Sin(Time.time * bobFrequency) * bobAmplitude;
        transform.position = new Vector3(transform.position.x, newY, transform.position.z);
    }

    private void OnTriggerEnter(Collider other)
    {
        if (isCollected) return;

        if (other.CompareTag("Player"))
        {
            if (CanCollect(other.gameObject))
            {
                Collect(other.gameObject);
            }
        }
    }

    protected virtual bool CanCollect(GameObject player)
    {
        return true;
    }

    protected abstract void ApplyPickupEffect(GameObject player);

    private void Collect(GameObject player)
    {
        isCollected = true;
        ApplyPickupEffect(player);

        // Play VFX
        if (pickupVFXPrefab != null)
        {
            GameObject vfx = Instantiate(pickupVFXPrefab, transform.position, Quaternion.identity);
            Destroy(vfx, 2.0f);
        }

        // Play SFX
        if (pickupSFX != null)
        {
            AudioSource.PlayClipAtPoint(pickupSFX, transform.position);
        }

        // Display toast notification on UI
        if (!string.IsNullOrEmpty(pickupMessage) && UIController.Instance != null)
        {
            UIController.Instance.ShowNotification(pickupMessage);
        }

        if (respawns)
        {
            SetVisibility(false);
            Invoke(nameof(Respawn), respawnTime);
        }
        else
        {
            Destroy(gameObject);
        }
    }

    private void Respawn()
    {
        isCollected = false;
        SetVisibility(true);
    }

    private void SetVisibility(bool visible)
    {
        if (itemCollider != null) itemCollider.enabled = visible;
        if (itemRenderers != null)
        {
            foreach (var rend in itemRenderers)
            {
                rend.enabled = visible;
            }
        }
    }
}