// 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.

namespace Microsoft.CodeAnalysis;

internal partial struct SymbolKey
{
    private sealed class FieldSymbolKey : AbstractSymbolKey<IFieldSymbol>
    {
        public static readonly FieldSymbolKey Instance = new();

        public sealed override void Create(IFieldSymbol symbol, SymbolKeyWriter visitor)
        {
            visitor.WriteString(symbol.MetadataName);
            visitor.WriteSymbolKey(symbol.ContainingType);
        }

        protected sealed override SymbolKeyResolution Resolve(
            SymbolKeyReader reader, IFieldSymbol? contextualSymbol, out string? failureReason)
        {
            var metadataName = reader.ReadString();
            var containingTypeResolution = reader.ReadSymbolKey(contextualSymbol?.ContainingType, out var containingTypeFailureReason);

            if (containingTypeFailureReason != null)
            {
                failureReason = $"({nameof(FieldSymbolKey)} {nameof(containingTypeResolution)} failed -> {containingTypeFailureReason})";
                return default;
            }

            using var result = GetMembersOfNamedType<IFieldSymbol>(containingTypeResolution, metadataName);
            return CreateResolution(result, $"({nameof(FieldSymbolKey)} '{metadataName}' not found)", out failureReason);
        }
    }
}