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

namespace System.Data.ProviderBase
{
    internal sealed partial class DbConnectionPoolIdentity
    {
        public static readonly DbConnectionPoolIdentity NoIdentity = new DbConnectionPoolIdentity(string.Empty, false, true);

        private readonly string _sidString;
        private readonly bool _isRestricted;
        private readonly bool _isNetwork;
        private readonly int _hashCode;

        private DbConnectionPoolIdentity(string sidString, bool isRestricted, bool isNetwork)
        {
            _sidString = sidString;
            _isRestricted = isRestricted;
            _isNetwork = isNetwork;
            _hashCode = sidString == null ? 0 : sidString.GetHashCode();
        }

        internal bool IsRestricted
        {
            get { return _isRestricted; }
        }

        internal static DbConnectionPoolIdentity GetCurrent()
        {
            throw new PlatformNotSupportedException();
        }

        public override bool Equals(object? value)
        {
            bool result = ((this == NoIdentity) || (this == value));
            if (!result && (null != value))
            {
                DbConnectionPoolIdentity that = ((DbConnectionPoolIdentity)value);
                result = ((_sidString == that._sidString) && (_isRestricted == that._isRestricted) && (_isNetwork == that._isNetwork));
            }
            return result;
        }

        public override int GetHashCode()
        {
            return _hashCode;
        }
    }
}