// Copyright (C) Stichting Deltares 2025. All rights reserved.
// 
// This file is part of the application DAM - UI.
// 
// DAM - UI is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// 
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

using Microsoft.Win32;

namespace Deltares.Dam.Data.Registry;

public abstract class RegistryReader
{
    /// <summary>
    /// Reads a string value from the Windows registry for the local machine.
    /// </summary>
    /// <param name="registryPath">The path to the key</param>
    /// <param name="valueName">The name of the key</param>
    /// <returns>The value or empty string if key is not found </returns>
    public static string GetRegistryValueFromLocalMachine(string registryPath, string valueName)
    {
        using RegistryKey key = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(registryPath);
        return GetRegistryValue(key, valueName);
    }

    /// <summary>
    /// Reads a string value from the Windows registry for the current user.
    /// </summary>
    /// <param name="registryPath">The path to the key</param>
    /// <param name="valueName">The name of the key</param>
    /// <returns>The value or empty string if key is not found </returns>
    public static string GetRegistryValueFromCurrentUser(string registryPath, string valueName)
    {
        using RegistryKey key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(registryPath);
        return GetRegistryValue(key, valueName);
    }

    private static string GetRegistryValue(RegistryKey key, string valueName)
    {
        var stringValue = "";
        if (key != null)
        {
            object value = key.GetValue(valueName);
            if (value != null)
            {
                stringValue = value.ToString();
            }
        }

        return stringValue;
    }
}