// 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.

using System.Diagnostics;

namespace Microsoft.CodeAnalysis.CSharp.Symbols
{
    internal sealed class CollectionBuilderAttributeData
    {
        public static readonly CollectionBuilderAttributeData Uninitialized = new CollectionBuilderAttributeData(null, null);

        public CollectionBuilderAttributeData(TypeSymbol? builderType, string? methodName)
        {
            BuilderType = builderType;
            MethodName = methodName;
        }

        public readonly TypeSymbol? BuilderType;
        public readonly string? MethodName;
    }

    /// <summary>
    /// Information decoded early from well-known custom attributes applied on a type.
    /// </summary>
    internal sealed class TypeEarlyWellKnownAttributeData : CommonTypeEarlyWellKnownAttributeData
    {
        #region InterpolatedStringHandlerAttribute
        private bool _hasInterpolatedStringHandlerAttribute;
        public bool HasInterpolatedStringHandlerAttribute
        {
            get
            {
                VerifySealed(expected: true);
                return _hasInterpolatedStringHandlerAttribute;
            }
            set
            {
                VerifySealed(expected: false);
                _hasInterpolatedStringHandlerAttribute = value;
                SetDataStored();
            }
        }
        #endregion

        #region InlineArrayAttribute

        private int _inlineArrayLength;
        public int InlineArrayLength
        {
            get
            {
                VerifySealed(expected: true);
                return _inlineArrayLength;
            }
            set
            {
                VerifySealed(expected: false);

                Debug.Assert(value is -1 or > 0);
                if (_inlineArrayLength == 0)
                {
                    _inlineArrayLength = value;
                }

                SetDataStored();
            }
        }

        #endregion

        #region CollectionBuilderAttribute
        private CollectionBuilderAttributeData? _collectionBuilder;
        public CollectionBuilderAttributeData? CollectionBuilder
        {
            get
            {
                VerifySealed(expected: true);
                return _collectionBuilder;
            }
            set
            {
                VerifySealed(expected: false);
                _collectionBuilder ??= value;
                SetDataStored();
            }
        }
        #endregion

        #region UnionAttribute
        private bool _hasUnionAttribute;
        public bool HasUnionAttribute
        {
            get
            {
                VerifySealed(expected: true);
                return _hasUnionAttribute;
            }
            set
            {
                VerifySealed(expected: false);
                _hasUnionAttribute = value;
                SetDataStored();
            }
        }
        #endregion
    }
}