// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
#nullable disable
 
using System;
using System.Runtime.InteropServices;
 
namespace Microsoft.VisualStudio.LanguageServices.CSharp.ProjectSystemShim.Interop;
 
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("4D5D4C21-EE19-11d2-B556-00C04F68D4DB")]
internal interface ICSCompilerConfig
{
    /// <summary>
    /// Return the number of options available.
    /// </summary>
    int GetOptionCount();
 
    /// <summary>
    /// Return info about the given option.
    /// </summary>
    void GetOptionInfoAt(int index,
                         out CompilerOptions optionID,
                         [MarshalAs(UnmanagedType.LPWStr)] out string switchName,
                         [MarshalAs(UnmanagedType.LPWStr)] out string switchDescription,
                         out uint flags);
 
    void GetOptionInfoAtEx(int index,
                           out CompilerOptions optionID,
                           [MarshalAs(UnmanagedType.LPWStr)] out string shortSwitchName,
                           [MarshalAs(UnmanagedType.LPWStr)] out string longSwitchName,
                           [MarshalAs(UnmanagedType.LPWStr)] out string descriptiveSwitchName,
                           out string switchDescription,
                           out uint flags);
 
    void ResetAllOptions();
 
    [PreserveSig]
    [return: MarshalAs(UnmanagedType.Error)]
    int SetOption(CompilerOptions optionID, HACK_VariantStructure value);
    void GetOption(CompilerOptions optionID, IntPtr variant);
 
    /// <summary>
    /// Commit changes to the options, validating first. If the configuration as it is currently is invalid, S_FALSE
    /// is returned, and error is populated with an error describing the problem.
    /// </summary>
    [PreserveSig]
    int CommitChanges(ref ICSError error);
 
    ICSCompiler GetCompiler();
 
    IntPtr GetWarnNumbers(out int count);
 
    [return: MarshalAs(UnmanagedType.LPWStr)]
    string GetWarnInfo(int warnIndex);
}