﻿// 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.CodeAnalysis;
using Microsoft.VisualStudio.LanguageServices.Implementation.CodeModel.Collections;
using Microsoft.VisualStudio.LanguageServices.Implementation.Interop;
using Microsoft.VisualStudio.LanguageServices.Implementation.Utilities;

namespace Microsoft.VisualStudio.LanguageServices.Implementation.CodeModel.ExternalElements
{
    [ComVisible(true)]
    [ComDefaultInterface(typeof(EnvDTE.CodeClass))]
    public sealed class ExternalCodeClass : AbstractExternalCodeType, EnvDTE80.CodeClass2, EnvDTE.CodeClass, EnvDTE.CodeType, EnvDTE.CodeElement, EnvDTE80.CodeElement2
    {
        internal static EnvDTE.CodeClass Create(CodeModelState state, ProjectId projectId, ITypeSymbol typeSymbol)
        {
            var newElement = new ExternalCodeClass(state, projectId, typeSymbol);
            return (EnvDTE.CodeClass)ComAggregate.CreateAggregatedObject(newElement);
        }

        private ExternalCodeClass(CodeModelState state, ProjectId projectId, ITypeSymbol typeSymbol)
            : base(state, projectId, typeSymbol)
        {
        }

        public override EnvDTE.vsCMElement Kind
        {
            get { return EnvDTE.vsCMElement.vsCMElementClass; }
        }

        public EnvDTE80.vsCMClassKind ClassKind
        {
            get
            {
                return EnvDTE80.vsCMClassKind.vsCMClassKindMainClass;
            }

            set
            {
                throw Exceptions.ThrowEFail();
            }
        }

        public EnvDTE80.vsCMDataTypeKind DataTypeKind
        {
            get
            {
                return EnvDTE80.vsCMDataTypeKind.vsCMDataTypeKindMain;
            }

            set
            {
                throw Exceptions.ThrowEFail();
            }
        }

        public override EnvDTE.CodeElements ImplementedInterfaces
        {
            get { return ExternalTypeCollection.Create(this.State, this, this.ProjectId, TypeSymbol.AllInterfaces); }
        }

        public EnvDTE80.vsCMInheritanceKind InheritanceKind
        {
            get
            {
                if (IsAbstract)
                {
                    return EnvDTE80.vsCMInheritanceKind.vsCMInheritanceKindAbstract;
                }
                else if (IsSealed)
                {
                    return EnvDTE80.vsCMInheritanceKind.vsCMInheritanceKindSealed;
                }
                else
                {
                    return EnvDTE80.vsCMInheritanceKind.vsCMInheritanceKindNone;
                }
            }

            set
            {
                throw Exceptions.ThrowEFail();
            }
        }

        public new bool IsAbstract
        {
            get
            {
                return base.IsAbstract;
            }

            set
            {
                throw new NotImplementedException();
            }
        }

        public bool IsGeneric
            => TypeSymbol is INamedTypeSymbol { IsGenericType: true };

        public EnvDTE.CodeElements PartialClasses
        {
            get { throw Exceptions.ThrowEFail(); }
        }

        public EnvDTE.CodeElements Parts
        {
            get { throw Exceptions.ThrowEFail(); }
        }

        public EnvDTE.CodeClass AddClass(string name, object position, object bases, object implementedInterfaces, EnvDTE.vsCMAccess access)
            => throw Exceptions.ThrowEFail();

        public EnvDTE.CodeDelegate AddDelegate(string name, object type, object position, EnvDTE.vsCMAccess access)
            => throw Exceptions.ThrowEFail();

        public EnvDTE.CodeEnum AddEnum(string name, object position, object bases, EnvDTE.vsCMAccess access)
            => throw Exceptions.ThrowEFail();

        public EnvDTE.CodeFunction AddFunction(string name, EnvDTE.vsCMFunction kind, object type, object position, EnvDTE.vsCMAccess access, object location)
            => throw Exceptions.ThrowEFail();

        public EnvDTE.CodeInterface AddImplementedInterface(object @base, object position)
            => throw Exceptions.ThrowEFail();

        public EnvDTE.CodeProperty AddProperty(string getterName, string putterName, object type, object position, EnvDTE.vsCMAccess access, object location)
            => throw Exceptions.ThrowEFail();

        public EnvDTE.CodeStruct AddStruct(string name, object position, object bases, object implementedInterfaces, EnvDTE.vsCMAccess access)
            => throw Exceptions.ThrowEFail();

        public EnvDTE.CodeVariable AddVariable(string name, object type, object position, EnvDTE.vsCMAccess access, object location)
            => throw Exceptions.ThrowEFail();

        public EnvDTE80.CodeEvent AddEvent(string name, string fullDelegateName, bool createPropertyStyleEvent, object location, EnvDTE.vsCMAccess access)
            => throw Exceptions.ThrowEFail();

        public void RemoveInterface(object element)
            => throw Exceptions.ThrowEFail();
    }
}
