// Copyright (C) Stichting Deltares 2016. All rights reserved.
//
// This file is part of Ringtoets.
//
// Ringtoets 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;
using System.Collections.Generic;
using System.Linq;
using Core.Common.Base;
using NUnit.Framework;
using Ringtoets.Piping.IO.Importers;
using Ringtoets.Piping.Plugin.FileImporter;
using Ringtoets.Piping.Primitives;

namespace Ringtoets.Piping.Plugin.Test.FileImporter
{
    [TestFixture]
    public class RingtoetsPipingSurfaceLineReplaceDataStrategyTest
    {
        [Test]
        public void Constructor_CreatesNewInstance()
        {
            // Call
            var strategy = new RingtoetsPipingSurfaceLineReplaceDataStrategy();

            // Assert
            Assert.IsInstanceOf<ISurfaceLineUpdateSurfaceLineStrategy>(strategy);
        }

        [Test]
        public void Constructor_TargetCollectionNull_ThrowsArgumentNullException()
        {
            // Setup
            var strategy = new RingtoetsPipingSurfaceLineReplaceDataStrategy();

            // Call
            TestDelegate test = () => strategy.UpdateSurfaceLinesWithImportedData(null, Enumerable.Empty<RingtoetsPipingSurfaceLine>(), string.Empty);

            // Assert
            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
            Assert.AreEqual("targetCollection", paramName);
        }

        [Test]
        public void UpdateSurfaceLinesWithImportedData_ReadSurfaceLinesNull_ThrowsArgumentNullException()
        {
            // Setup
            var strategy = new RingtoetsPipingSurfaceLineReplaceDataStrategy();

            // Call
            TestDelegate test = () => strategy.UpdateSurfaceLinesWithImportedData(new ObservableCollectionWithSourcePath<RingtoetsPipingSurfaceLine>(),
                                                                           null,
                                                                           string.Empty);

            // Assert
            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
            Assert.AreEqual("readRingtoetsPipingSurfaceLines", paramName);
        }

        [Test]
        public void UpdateSurfaceLinesWithImportedData_SourceFilePathNull_ThrowsArgumentNullException()
        {
            // Setup
            var strategy = new RingtoetsPipingSurfaceLineReplaceDataStrategy();

            // Call
            TestDelegate test = () => strategy.UpdateSurfaceLinesWithImportedData(new ObservableCollectionWithSourcePath<RingtoetsPipingSurfaceLine>(),
                                                                           Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                                           null);

            // Assert
            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
            Assert.AreEqual("sourceFilePath", paramName);
        }

        [Test]
        public void UpdateSurfaceLinesWithImportedData_DifferentSourcePath_UpdatesSourcePathOfTargetCollection()
        {
            // Setup 
            var targetCollection = new ObservableCollectionWithSourcePath<RingtoetsPipingSurfaceLine>();

            var strategy = new RingtoetsPipingSurfaceLineReplaceDataStrategy();
            const string newSourcePath = "some/other/path";

            // Call
            IEnumerable<IObservable> affectedObjects = strategy.UpdateSurfaceLinesWithImportedData(targetCollection,
                                                                                            Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                                                            newSourcePath);

            // Assert
            CollectionAssert.AreEqual(new IObservable[]
            {
                targetCollection
            }, affectedObjects);
            CollectionAssert.IsEmpty(targetCollection);
            Assert.AreEqual(newSourcePath, targetCollection.SourcePath);
        }

        [Test]
        public void UpdateSurfaceLinesWithImportedData_DifferentElements_UpdatesTargetCollection()
        {
            // Setup
            var targetSurfaceLine = new RingtoetsPipingSurfaceLine
            {
                Name = "Name A",
            };
            var targetCollection = new ObservableCollectionWithSourcePath<RingtoetsPipingSurfaceLine>();
            targetCollection.AddRange(new[]
            {
                targetSurfaceLine
            }, "some/path");

            var readSurfaceLine = new RingtoetsPipingSurfaceLine
            {
                Name = "Name B"
            };
            var readSurfacelines = new[]
            {
                readSurfaceLine
            };

            var strategy = new RingtoetsPipingSurfaceLineReplaceDataStrategy();

            // Call
            IEnumerable<IObservable> affectedObjects = strategy.UpdateSurfaceLinesWithImportedData(targetCollection,
                                                                                            readSurfacelines,
                                                                                            "some/path");

            // Assert
            CollectionAssert.AreEqual(new IObservable[]
            {
                targetCollection
            }, affectedObjects);

            var expectedTargetCollection = new[]
            {
                readSurfaceLine
            };
            CollectionAssert.AreEqual(expectedTargetCollection, targetCollection);
        }
    }
}