using UnityEngine;

namespace OnlyScove.Scripts
{
    public class EnvironmentScanner : MonoBehaviour
    {
        [Header("Obstacle Detection")]
        [SerializeField] private Vector3 forwardRayOffset = new Vector3(0, 1.5f, 0);
        [SerializeField] float forwardRayLength = 1.5f;
        [SerializeField] LayerMask obstacleLayer;
        [SerializeField] float heightRayLength = 2.5f;

        [Header("Interaction Detection")]
        [SerializeField] private Vector3 interactionOffset = new Vector3(0, 1.5f, 0);
        [SerializeField] private float interactionRadius = 0.5f;
        
        public ObstacleHitInfo ObstacleCheck()
        {
            var hitData = new ObstacleHitInfo();
            
            var forwardOrigin = transform.position + forwardRayOffset;
            
            hitData.forwardHitFound =  Physics.Raycast(transform.position + forwardRayOffset,
                transform.forward,
                out hitData.forwardHit,
                forwardRayLength, obstacleLayer
            );
            
            Debug.DrawRay(forwardOrigin, transform.forward * forwardRayLength, (hitData.forwardHitFound) ? Color.red : Color.green);

            if (hitData.forwardHitFound)
            {
                var heightOrigin = hitData.forwardHit.point + Vector3.up * heightRayLength;
                hitData.heightHitFound = Physics.Raycast(heightOrigin, Vector3.down,
                    out hitData.heightHit,
                    heightRayLength, obstacleLayer);
                
                Debug.DrawRay(heightOrigin, Vector3.down * heightRayLength, (hitData.heightHitFound) ? Color.red : Color.green);

            }
            return hitData;
        }

        public IInteractable ScanForInteractable(float range, LayerMask mask)
        {
            if (Camera.main == null) return null;

            Transform camTransform = Camera.main.transform;
            Vector3 origin = camTransform.position;
            Vector3 direction = camTransform.forward;

            // Vẽ tia debug trong cửa sổ Scene để bạn kiểm tra (Nhấn nút Gizmos trong Scene để thấy)
            Debug.DrawRay(origin, direction * range, Color.blue);

            if (Physics.Raycast(origin, direction, out RaycastHit hit, range, mask))
            {
                if (hit.collider.TryGetComponent(out IInteractable interactable))
                {
                    Debug.DrawLine(origin, hit.point, Color.red); // Tia chuyển đỏ khi chạm vật tương tác
                    return interactable;
                }
            }
            return null;
        }

        public Vector3 GetLastInteractionPoint(float range, LayerMask mask)
        {
            if (Camera.main == null) return Vector3.zero;
            Transform camTransform = Camera.main.transform;
            if (Physics.Raycast(camTransform.position, camTransform.forward, out RaycastHit hit, range, mask))
                return hit.point;
            return Vector3.zero;
        }

        private void OnDrawGizmosSelected()
        {
            Gizmos.color = Color.cyan;
            Vector3 origin = transform.position + interactionOffset;
            Gizmos.DrawLine(origin, origin + transform.forward * 2f);
            Gizmos.DrawWireSphere(origin + transform.forward * 2f, interactionRadius);
        }
    }
}


public struct ObstacleHitInfo
{
    public RaycastHit forwardHit;
    public RaycastHit heightHit;
    public bool forwardHitFound;
    public bool heightHitFound;
}