// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using ILCompiler.Dataflow;
using ILLink.Shared.DataFlow;
using Internal.TypeSystem;

#nullable enable

namespace ILLink.Shared.TrimAnalysis
{
    /// <summary>
    /// This is a System.Type value which represents generic parameter (basically result of typeof(T))
    /// Its actual type is unknown, but it can have annotations.
    /// </summary>
    internal partial record GenericParameterValue
    {
        public GenericParameterValue(GenericParameterDesc genericParameter, DynamicallyAccessedMemberTypes dynamicallyAccessedMemberTypes)
        {
            GenericParameter = new(genericParameter);
            DynamicallyAccessedMemberTypes = dynamicallyAccessedMemberTypes;
        }

        public override DynamicallyAccessedMemberTypes DynamicallyAccessedMemberTypes { get; }

        public override IEnumerable<string> GetDiagnosticArgumentsForAnnotationMismatch()
            => new string[] { GenericParameter.GenericParameter.Name, DiagnosticUtilities.GetGenericParameterDeclaringMemberDisplayName(GenericParameter.GenericParameter) };

        public override SingleValue DeepCopy() => this; // This value is immutable

        public override string ToString() => this.ValueToString(GenericParameter, DynamicallyAccessedMemberTypes);
    }
}