using System;
using UnityEngine;
using UnityEngine.InputSystem;
[RequireComponent(typeof(BoxCollider))]
public sealed class KeyedStationProbe : MonoBehaviour
{
    [SerializeField] private Camera viewCamera;
    [SerializeField] private GameObject closedVisual;
    [SerializeField] private LayerMask interactionLayers = ~0;
    [SerializeField, Min(0.01f)] private float range = 3f;
    private Collider stationCollider;
    private InputAction interact;
    private GateState state;
    private void Awake()
    {
        stationCollider = GetComponent<BoxCollider>();
        state = new GateState();
        interact = new InputAction("Interact", InputActionType.Button, "<Keyboard>/e");
    }
    private void OnEnable() { if (interact != null) { interact.performed += OnInteract; interact.Enable(); } }
    private void OnDisable() { if (interact != null) { interact.performed -= OnInteract; interact.Disable(); } }
    private void OnDestroy() { if (interact != null) interact.Dispose(); }
    [ContextMenu("Grant Key (Play Mode)")]
    public void GrantKey() { if (Application.isPlaying && state != null) { state.GrantKey(); Debug.Log("Key available: " + state.HasKey, this); } }
    private void OnInteract(InputAction.CallbackContext context)
    {
        if (!isActiveAndEnabled || state == null || viewCamera == null || stationCollider == null) return;
        if (range <= 0f || float.IsNaN(range) || float.IsInfinity(range)) return;
        Ray ray = viewCamera.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0f));
        if (!Physics.Raycast(ray, out RaycastHit hit, range, interactionLayers, QueryTriggerInteraction.Ignore)) return;
        if (hit.collider != stationCollider || !state.TryOpen(true, hit.distance, range)) return;
        stationCollider.enabled = false;
        if (closedVisual != null && closedVisual != gameObject) closedVisual.SetActive(false);
        Debug.Log("Station opened once; key consumed", this);
    }
public sealed class GateState
{
    public bool HasKey { get; private set; }
    public bool Opened { get; private set; }
    public void GrantKey() { if (!Opened) HasKey = true; }
    public bool TryOpen(bool focused, float distance, float maximum)
    {
        if (maximum <= 0f || float.IsNaN(maximum) || float.IsInfinity(maximum)) throw new ArgumentOutOfRangeException(nameof(maximum));
        if (distance < 0f || float.IsNaN(distance) || float.IsInfinity(distance)) throw new ArgumentOutOfRangeException(nameof(distance));
        if (Opened || !HasKey || !focused || distance > maximum) return false;
        HasKey = false; Opened = true; return true;
    }
}
}