// 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.Collections.Generic;
using System.Collections.Immutable;
using Microsoft.CodeAnalysis.Editing;

namespace Microsoft.CodeAnalysis.CodeGeneration;

internal abstract class CodeGenerationAbstractNamedTypeSymbol : CodeGenerationTypeSymbol, INamedTypeSymbol
{
    public new INamedTypeSymbol OriginalDefinition { get; protected set; }

    public ImmutableArray<IFieldSymbol> TupleElements { get; protected set; }

    internal readonly ImmutableArray<CodeGenerationAbstractNamedTypeSymbol> TypeMembers;

    protected CodeGenerationAbstractNamedTypeSymbol(
        IAssemblySymbol containingAssembly,
        INamedTypeSymbol containingType,
        ImmutableArray<AttributeData> attributes,
        Accessibility declaredAccessibility,
        DeclarationModifiers modifiers,
        string name,
        SpecialType specialType,
        NullableAnnotation nullableAnnotation,
        ImmutableArray<CodeGenerationAbstractNamedTypeSymbol> typeMembers)
        : base(containingAssembly, containingType, attributes, declaredAccessibility, modifiers, name, specialType, nullableAnnotation)
    {
        this.TypeMembers = typeMembers;

        foreach (var member in typeMembers)
        {
            member.ContainingType = this;
        }
    }

    public override SymbolKind Kind => SymbolKind.NamedType;

    public override void Accept(SymbolVisitor visitor)
        => visitor.VisitNamedType(this);

    public override TResult Accept<TResult>(SymbolVisitor<TResult> visitor)
        => visitor.VisitNamedType(this);

    public override TResult Accept<TArgument, TResult>(SymbolVisitor<TArgument, TResult> visitor, TArgument argument)
        => visitor.VisitNamedType(this, argument);

    public INamedTypeSymbol Construct(params ITypeSymbol[] typeArguments)
    {
        if (typeArguments.Length == 0)
        {
            return this;
        }

        return new CodeGenerationConstructedNamedTypeSymbol(
            ConstructedFrom, [.. typeArguments], this.TypeMembers);
    }

    public INamedTypeSymbol Construct(ImmutableArray<ITypeSymbol> typeArguments, ImmutableArray<NullableAnnotation> typeArgumentNullableAnnotations)
    {
        return new CodeGenerationConstructedNamedTypeSymbol(
            ConstructedFrom, typeArguments, this.TypeMembers);
    }

    public abstract int Arity { get; }
    public abstract bool IsGenericType { get; }
    public abstract bool IsUnboundGenericType { get; }
    public abstract bool IsScriptClass { get; }
    public abstract bool IsImplicitClass { get; }
    public abstract IEnumerable<string> MemberNames { get; }
    public abstract IMethodSymbol DelegateInvokeMethod { get; }
    public abstract INamedTypeSymbol EnumUnderlyingType { get; }
    protected abstract CodeGenerationNamedTypeSymbol ConstructedFrom { get; }
    INamedTypeSymbol INamedTypeSymbol.ConstructedFrom => this.ConstructedFrom;
    public abstract INamedTypeSymbol ConstructUnboundGenericType();
    public abstract ImmutableArray<IMethodSymbol> InstanceConstructors { get; }
    public abstract ImmutableArray<IMethodSymbol> StaticConstructors { get; }
    public abstract ImmutableArray<IMethodSymbol> Constructors { get; }
    public abstract ImmutableArray<ITypeSymbol> TypeArguments { get; }
    public abstract ImmutableArray<NullableAnnotation> TypeArgumentNullableAnnotations { get; }

    public ImmutableArray<CustomModifier> GetTypeArgumentCustomModifiers(int ordinal)
    {
        if (ordinal < 0 || ordinal >= Arity)
        {
            throw new IndexOutOfRangeException();
        }

        return [];
    }

    public abstract ImmutableArray<ITypeParameterSymbol> TypeParameters { get; }

    public override string MetadataName
    {
        get
        {
            return this.Arity > 0
                ? this.Name + "`" + Arity
                : base.MetadataName;
        }
    }

    public ISymbol AssociatedSymbol { get; internal set; }

    public bool MightContainExtensionMethods => false;

    public bool IsComImport => false;

    public bool IsUnmanagedType => throw new NotImplementedException();

    public bool IsRefLikeType => Modifiers.IsRef;

    public INamedTypeSymbol NativeIntegerUnderlyingType => null;

    public INamedTypeSymbol TupleUnderlyingType => null;

    public bool IsSerializable => false;

    public bool IsFileLocal => Modifiers.IsFile;

#if !OLDER_ROSLYN
    public bool IsExtension => false;
    public string ExtensionGroupingName => null;
    public string ExtensionMarkerName => null;
    public IParameterSymbol ExtensionParameter => null;

    public override bool IsClosed => Modifiers.IsClosed;
#endif
}