// 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.Collections.Immutable;
 
namespace Microsoft.CodeAnalysis.CodeGeneration
{
    internal class CodeGenerationConstructedMethodSymbol : CodeGenerationAbstractMethodSymbol
    {
        private readonly CodeGenerationAbstractMethodSymbol _constructedFrom;
        private readonly ImmutableArray<ITypeSymbol> _typeArguments;
 
        public CodeGenerationConstructedMethodSymbol(
            CodeGenerationAbstractMethodSymbol constructedFrom,
            ImmutableArray<ITypeSymbol> typeArguments)
            : base(constructedFrom.ContainingType,
                   constructedFrom.GetAttributes(),
                   constructedFrom.DeclaredAccessibility,
                   constructedFrom.Modifiers,
                   constructedFrom.Name,
                   constructedFrom.GetReturnTypeAttributes())
        {
            _constructedFrom = constructedFrom;
            this.OriginalDefinition = _constructedFrom.OriginalDefinition;
            _typeArguments = typeArguments;
        }
 
        public override int Arity => _constructedFrom.Arity;
 
        public override bool ReturnsVoid => _constructedFrom.ReturnsVoid;
 
        public override bool ReturnsByRef => _constructedFrom.ReturnsByRef;
 
        public override RefKind RefKind => _constructedFrom.RefKind;
 
        public override bool ReturnsByRefReadonly
        {
            get
            {
                return _constructedFrom.ReturnsByRefReadonly;
            }
        }
 
        public override ITypeSymbol ReturnType
        {
            get
            {
                // TODO(cyrusn): Construct this.
                return _constructedFrom.ReturnType;
            }
        }
 
        public override ImmutableArray<ITypeSymbol> TypeArguments => _typeArguments;
 
        public override ImmutableArray<ITypeParameterSymbol> TypeParameters => _constructedFrom.TypeParameters;
 
        public override ImmutableArray<IParameterSymbol> Parameters
        {
            get
            {
                // TODO(cyrusn): Construct this.
                return this.OriginalDefinition.Parameters;
            }
        }
 
        public override IMethodSymbol ConstructedFrom => _constructedFrom;
 
        public override bool IsReadOnly => _constructedFrom.IsReadOnly;
        public override bool IsInitOnly => _constructedFrom.IsInitOnly;
 
        public override System.Reflection.MethodImplAttributes MethodImplementationFlags => _constructedFrom.MethodImplementationFlags;
 
        public override IMethodSymbol OverriddenMethod
                // TODO(cyrusn): Construct this.
                => _constructedFrom.OverriddenMethod;
 
        public override IMethodSymbol ReducedFrom
                // TODO(cyrusn): Construct this.
                => _constructedFrom.ReducedFrom;
 
        public override ITypeSymbol GetTypeInferredDuringReduction(ITypeParameterSymbol reducedFromTypeParameter)
            => throw new System.InvalidOperationException();
 
        public override IMethodSymbol ReduceExtensionMethod(ITypeSymbol receiverType)
        {
            // TODO(cyrusn): support this properly.
            return null;
        }
 
        public override ImmutableArray<IMethodSymbol> ExplicitInterfaceImplementations
                // TODO(cyrusn): Construct this.
                => _constructedFrom.ExplicitInterfaceImplementations;
 
        public override IMethodSymbol PartialDefinitionPart
                // TODO(cyrusn): Construct this.
                => _constructedFrom.PartialDefinitionPart;
 
        public override IMethodSymbol PartialImplementationPart
                // TODO(cyrusn): Construct this.
                => _constructedFrom.PartialImplementationPart;
 
        public override bool IsPartialDefinition => _constructedFrom.IsPartialDefinition;
 
        protected override CodeGenerationSymbol Clone()
            => new CodeGenerationConstructedMethodSymbol(_constructedFrom, _typeArguments);
    }
}