// 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;
using Microsoft.VisualStudio.LanguageServices.CSharp.ProjectSystemShim.Interop;
 
namespace Microsoft.VisualStudio.LanguageServices.CSharp.ProjectSystemShim;
 
internal partial class CSharpProjectShim : ICSCompilerConfig
{
    public int GetOptionCount()
    {
        // NOTE: We return the length minus 1 to ensure that we're never called
        // with LARGEST_OPTION_ID.
        return (int)CompilerOptions.LARGEST_OPTION_ID - 1;
    }
 
    public void GetOptionInfoAt(int index, out CompilerOptions optionID, out string switchName, out string switchDescription, out uint flags)
        => throw new NotImplementedException();
 
    public void GetOptionInfoAtEx(int index, out CompilerOptions optionID, out string shortSwitchName, out string longSwitchName, out string descriptiveSwitchName, out string switchDescription, out uint flags)
        => throw new NotImplementedException();
 
    public void ResetAllOptions()
    {
        ProjectSystemProjectOptionsProcessor[CompilerOptions.OPTID_CCSYMBOLS] = string.Empty;
        ProjectSystemProjectOptionsProcessor[CompilerOptions.OPTID_KEYFILE] = string.Empty;
        ProjectSystemProjectOptionsProcessor[CompilerOptions.OPTID_NOWARNLIST] = string.Empty;
        ProjectSystemProjectOptionsProcessor[CompilerOptions.OPTID_WARNASERRORLIST] = string.Empty;
        ProjectSystemProjectOptionsProcessor[CompilerOptions.OPTID_WARNNOTASERRORLIST] = string.Empty;
        ProjectSystemProjectOptionsProcessor[CompilerOptions.OPTID_UNSAFE] = false;
        ProjectSystemProjectOptionsProcessor[CompilerOptions.OPTID_XML_DOCFILE] = string.Empty;
    }
 
    public int SetOption(CompilerOptions optionID, HACK_VariantStructure value)
    {
        ProjectSystemProjectOptionsProcessor[optionID] = value.ConvertToObject();
 
        if (optionID == CompilerOptions.OPTID_COMPATIBILITY)
        {
            // HACK: we want the project system to use the out-of-proc compiler rather than
            // us, because we really don't build much of anything yet. We can say we don't
            // support pretty much anything we want to do this. Let's just say we don't
            // support any version of C# yet
 
            return VSConstants.S_FALSE;
        }
 
        return VSConstants.S_OK;
    }
 
    public void GetOption(CompilerOptions optionID, IntPtr variant)
        => Marshal.GetNativeVariantForObject(ProjectSystemProjectOptionsProcessor[optionID], variant);
 
    public int CommitChanges(ref ICSError error)
    {
        // We shall say we succeeded
        return VSConstants.S_OK;
    }
 
    public IntPtr GetWarnNumbers(out int count)
    {
        // The native consumer of this in CCscMSBuildHostObject::ConstructAndSetWarningsData
        // seems to expect that we "return" a pointer to an array of warning numbers of length
        // "count", but it treats this as an immutable array which it doesn't free or anything.
        // Implementing such a oddity is quite a mess in managed code, and so we allocated an
        // (empty) array during the creation of this, which we will clean up in the finalizer.
 
        count = 0;
        return _warningNumberArrayPointer;
    }
 
    public string GetWarnInfo(int warnIndex)
        => throw new NotImplementedException();
}