using UnityEngine;
using Unheimlich.Core;
using Unheimlich.Managers;
using Unheimlich.Utility;

namespace Unheimlich.Interactions.Core
{
    public class InteractionHandler : Singleton<InteractionHandler>
    {

    [Header("Settings")]
    [SerializeField] private float _interactionRange = 1f;
    [SerializeField] private LayerMask _interactableLayers;
    [SerializeField] private float _raycastInterval = 0.1f;

    private InteractableBase _currentInteractable;
    private Camera _playerCamera;
    private float _raycastTimer;

    protected override void OnAwake()
    {
        _playerCamera = GetComponent<Camera>();
    }

    private void Update()
    {
        if (RaycastHelper.ThrottledRaycastComponent(
            ref _raycastTimer, 
            _raycastInterval,
            _playerCamera, 
            _interactionRange, 
            _interactableLayers, 
            out InteractableBase interactable))
        {
            _currentInteractable = interactable;
        }
        else if (_raycastTimer == 0f)
        {
            _currentInteractable = null;
        }
        
        HandleInteractionInput();
    }
    
    private void HandleInteractionInput()
    {
        var interactAction = PlayerInputManager.GetInteractAction();
        if (interactAction != null && interactAction.WasPressedThisFrame())
        {
            if (_currentInteractable != null)
                _currentInteractable.Interact();
        }
    }

    private void OnDrawGizmosSelected()
    {
        if (_playerCamera != null)
        {
            Gizmos.color = _currentInteractable != null ? Color.green : Color.red;
            
            Vector3 viewportCenter = new Vector3(0.5f, 0.5f, 0f);
            Ray ray = _playerCamera.ViewportPointToRay(viewportCenter);
            Gizmos.DrawRay(ray.origin, ray.direction * _interactionRange);
        }
    }
}
}