using UnityEngine;

public class SecurityCamera : MonoBehaviour
{
    [Header("Detection Settings")]
    public float sphereCastRadius = 3f;
    public float viewDistance = 20f;
    [Range(0f, 180f)]
    public float horizontalFOV = 90f;
    [Range(0f, 90f)]
    public float verticalFOV = 45f;

    [Header("Layers")]
    public LayerMask obstacleMask;  // For walls/obstacles
    public LayerMask detectionMask; // Should include "Player" layer

    private Transform player;

    private void Start()
    {
        GameObject playerObj = GameObject.FindGameObjectWithTag("Player");
        if (playerObj != null)
            player = playerObj.transform;
        else
            Debug.LogError("Player not found. Make sure it's tagged as 'Player'.");
    }

    private void FixedUpdate()
    {
        if (player == null)
            return;

        // Check if player is within detection radius
        Collider[] hits = Physics.OverlapSphere(transform.position, viewDistance, detectionMask);

        foreach (var hit in hits)
        {
            if (!hit.CompareTag("Player"))
                continue;

            Vector3 directionToPlayer = hit.transform.position - transform.position;

            // Horizontal FOV check
            Vector3 horizontalDir = directionToPlayer;
            horizontalDir.y = 0;
            Vector3 forwardFlat = transform.forward;
            forwardFlat.y = 0;

            float horizontalAngle = Vector3.Angle(forwardFlat, horizontalDir);

            // Vertical FOV check
            float verticalOffset = directionToPlayer.y;
            float verticalAngle = Mathf.Atan2(verticalOffset, horizontalDir.magnitude) * Mathf.Rad2Deg;

            if (horizontalAngle <= horizontalFOV * 0.5f && Mathf.Abs(verticalAngle) <= verticalFOV * 0.5f)
            {
                // Check line of sight
                if (Physics.Raycast(transform.position, directionToPlayer.normalized, out RaycastHit rayHit, viewDistance, ~obstacleMask))
                {
                    if (rayHit.transform.CompareTag("Player"))
                    {
                        Debug.Log("Player detected!");
                        // Your detection logic here
                    }
                }
            }
        }
    }

    private void OnDrawGizmosSelected()
    {
        // Sphere radius
        Gizmos.color = Color.yellow;
        Gizmos.DrawWireSphere(transform.position, viewDistance);

        // FOV boundaries
        Gizmos.color = Color.green;
        Vector3 rightBoundary = Quaternion.Euler(0, horizontalFOV * 0.5f, 0) * transform.forward;
        Vector3 leftBoundary = Quaternion.Euler(0, -horizontalFOV * 0.5f, 0) * transform.forward;
        Gizmos.DrawLine(transform.position, transform.position + rightBoundary * viewDistance);
        Gizmos.DrawLine(transform.position, transform.position + leftBoundary * viewDistance);
    }
}