using System.Diagnostics;
using Windows.Win32;
using WxAgent.Core;

namespace WxAgent.Windows;

internal static class WechatDesktop
{
    public static bool IsInputAvailable()
    {
        using var process = Process.GetCurrentProcess();
        // UIA can read cached windows on a locked/disconnected desktop. GetCursorPos requires the input desktop.
        return Environment.UserInteractive && process.SessionId != 0 && PInvoke.GetCursorPos(out _);
    }

    public static void EnsureInputAvailable()
    {
        if (!IsInputAvailable())
            throw new WxAgentException(WxAgentErrorCode.SessionLocked,
                "The current session cannot access the input desktop. Connect and unlock the existing user session; no login bypass was attempted.");
    }
}