using UnityEngine;
using UnityEngine.EventSystems;
using TMPro;

/// <summary>
/// True while the user is editing a focused on-screen text field (e.g. the paint HUD's
/// "save as" name input). Global gameplay/dev hotkeys consult this so typing a name like
/// "Checkers" doesn't also fire single-key shortcuts (C = cycle pose, K = shutdown,
/// the mode-switch key, Ctrl+Z = undo, ...).
/// </summary>
public static class TypingGuard
{
    // Consulted several times per frame by the hotkey readers; the GetComponent lookups are cached
    // per selected GameObject (a selection change refreshes them).
    private static GameObject _cachedGo;
    private static TMP_InputField _cachedTmp;
    private static UnityEngine.UI.InputField _cachedLegacy;

    /// <summary>A text input field is currently focused and capturing keystrokes.</summary>
    public static bool IsTyping
    {
        get
        {
            var es = EventSystem.current;
            if (!es) return false;

            var go = es.currentSelectedGameObject;
            if (!go) return false;

            if (go != _cachedGo)
            {
                _cachedGo = go;
                _cachedTmp = go.GetComponent<TMP_InputField>();
                _cachedLegacy = _cachedTmp ? null : go.GetComponent<UnityEngine.UI.InputField>();
            }

            if (_cachedTmp) return _cachedTmp.isFocused;
            return _cachedLegacy && _cachedLegacy.isFocused;
        }
    }
}