// Copyright (C) Stichting Deltares 2023. All rights reserved.
// 
// This file is part of the application DAM - UI.
// 
// DAM - UI is free software: you can redistribute it and/or modify
// it under the terms of the GNU 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 General Public License for more details.
// 
// You should have received a copy of the GNU 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.

using System.Collections.Generic;
using System.Linq;
using Deltares.Dam.Data;
using Deltares.Standard.Specifications.Extensions;
using NUnit.Framework;

namespace Deltares.Standard.Specifications.Tests
{
    /// <summary>
    /// Summary description for UnitTest1
    /// </summary>
    [TestFixture]
    public class SpecifcationTest
    {
        /// <summary>
        /// Composite specifications test
        /// Define multiple specifications and compose them as one
        /// </summary>
        [Test]
        public void CompositionTest()
        {
            var m = new Model();
            var c = new Cluster {Id = 1};
            var clusters = new List<Cluster> {c};

            // Compose the specifications as one
            CompositeSpecification<Cluster> clusterValid = new ClusterValidIdSpecification();
                // -> see domain model for definition
            ISpecification<Cluster> clusterInCollection = new ClusterInCollection(clusters);
                // -> see domain model for definition
            ISpecification<Cluster> validAndNotInCollection = clusterValid.And(clusterInCollection).Not();

            const bool expected = false;
            bool actual = validAndNotInCollection.IsSatisfiedBy(c);
            Assert.AreEqual(expected, actual);
        }

        /// <summary>
        /// Parameterized specification 
        /// </summary>
        [Test]
        public void ParameterizedSpecificationTest()
        {
            var m = new Model {Id = 2};

            // not very usefull in practice but for this test ok
            // just test to see if id equals 3. The model id is 2 so
            // the rule will not be satisfied
            var modelId = new ModelUniqueIdSpecification(3);
            Assert.IsFalse(modelId.IsSatisfiedBy(m));

            // Changing the id to 3 and re-evaluate the rule 
            // Now it will be satisfied by the candidate
            m.Id = 3;
            Assert.IsTrue(modelId.IsSatisfiedBy(m));
        }

        /// <summary>
        /// Uses the LayerHasValidTopBottomValues specification for selecting
        /// </summary>
        [Test]
        public void SelectBySpecificationTest()
        {
            var c = new Cluster();
            c.Layers.AddRange(new[]
                              {
                                  new Layer {Bottom = 10, Top = 20},
                                  new Layer {Bottom = 20, Top = 40},
                                  new Layer {Bottom = 10, Top = 9}
                                  // -> not satisfied by specification LayerHasValidTopBottomValues
                              });

            Layer[] validLayers = c.Layers.GetBySpecification(new LayerHasValidTopBottomValues()).ToArray();

            Assert.IsTrue(validLayers != null && validLayers.Length == 2);

            // Change the state of the first layer and test again for validation
            validLayers[0].Top = 1;
            const bool expected = false;
            bool actual = validLayers[0].IsSatisfiedBySpecification(new LayerHasValidTopBottomValues());
            Assert.AreEqual(expected, actual);
        }

        /// <summary>
        /// Test the min max attributes
        /// The soil is decorated with two attributes MinimumAttribute with value 20 
        /// and a MaximumAttribute with value -1
        /// </summary>
        [Test]
        public void ValidateWithMinMaxAttributesTest()
        {
            var s = new Soil(); // -> GammaWet and GammaDry will be 0 (defaults)

            // Validator will return 2 items because 2 specifacations are not satisfied
            // GammaWet hase spec Minimum 20 and GammaDry has spec Maximum -1
            var vr = s.Validate();

            Assert.IsTrue(vr != null && vr.Count() == 2);
        }

        /// <summary>
        /// Tests the SpecificationAttribute for validating
        /// In the class Layer the LayerHasValidTopBottomValues (see the test domain model) specification used
        /// </summary>
        [Test]
        public void ValidateWithSpecificationAttributeTest()
        {
            // setup
            var l = new Layer {Bottom = 10, Top = 9, Name =  "abcYz"};

            // call
            var vr = l.Validate();

            // check
            Assert.IsTrue(vr.Any()); // <- should have at least one broken validation rule
            Assert.AreEqual(vr.ElementAt(0).Text, (new LayerHasValidTopBottomValues()).Description);
        }
    }
}