using UnityEngine;

namespace Unheimlich.Utility
{
    public static class RaycastHelper
    {
        private static readonly Vector3 ViewportCenter = new Vector3(0.5f, 0.5f, 0f);
        
        public static bool RaycastFromCameraCenter(Camera camera, float maxDistance, 
            LayerMask layerMask, out RaycastHit hit)
        {
            if (camera == null)
            {
                hit = default;
                return false;
            }
            
            Ray ray = camera.ViewportPointToRay(ViewportCenter);
            return Physics.Raycast(ray, out hit, maxDistance, layerMask);
        }
        
        public static bool RaycastFromCameraCenter<T>(Camera camera, float maxDistance, 
            LayerMask layerMask, out T component) where T : Component
        {
            component = null;
            
            if (RaycastFromCameraCenter(camera, maxDistance, layerMask, out RaycastHit hit))
            {
                component = hit.collider.GetComponent<T>();
                return component != null;
            }
            
            return false;
        }
        
        public static bool ThrottledRaycast(ref float timer, float interval, 
            Camera camera, float maxDistance, LayerMask layerMask, out RaycastHit hit)
        {
            timer += Time.deltaTime;
            
            if (timer >= interval)
            {
                timer = 0f;
                return RaycastFromCameraCenter(camera, maxDistance, layerMask, out hit);
            }
            
            hit = default;
            return false;
        }
        
        public static bool ThrottledRaycastComponent<T>(ref float timer, float interval, 
            Camera camera, float maxDistance, LayerMask layerMask, out T component) where T : Component
        {
            timer += Time.deltaTime;
            
            if (timer >= interval)
            {
                timer = 0f;
                return RaycastFromCameraCenter(camera, maxDistance, layerMask, out component);
            }
            
            component = null;
            return false;
        }
    }
}