// Copyright (C) Stichting Deltares 2021. All rights reserved.
//
// This file is part of the Dam Engine.
//
// The Dam Engine is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

namespace Deltares.DamEngine.Data.General.Specifications
{
    public class NotSpecification<TCandidate> : CompositeSpecification<TCandidate>
    {
        private readonly ISpecification<TCandidate> specification;

        public NotSpecification(ISpecification<TCandidate> specification)
        {
            this.specification = specification;
        }

        /// <summary>
        /// Determines whether the candidate satisfies the specification.
        /// </summary>
        /// <param name="candidate">The candidate to test.</param>
        /// <returns>
        ///   <c>true</c> if the candidate satisfies the specification otherwise, <c>false</c>.
        /// </returns>
        public override bool IsSatisfiedBy(TCandidate candidate)
        {
            bool satisfied = !(specification.IsSatisfiedBy(candidate));
            if (!satisfied)
            {
                base.Description = specification.Description;
            }
            return satisfied;
        }
    }
}