// Copyright (C) Stichting Deltares 2018. 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 System.Windows.Forms;
using Core.Common.Base;
using Core.Common.Base.Geometry;
using Core.Components.Gis.Data;
using Core.Components.Gis.Forms;
using NUnit.Framework;
using Rhino.Mocks;
using Ringtoets.Common.Data.AssessmentSection;
using Ringtoets.Common.Data.Hydraulics;
using Ringtoets.Common.Data.TestUtil;
using Ringtoets.Common.Forms.TestUtil;
using Ringtoets.Common.Forms.Views;
using Ringtoets.Integration.Forms.Views;

namespace Ringtoets.Integration.Forms.Test.Views
{
    [TestFixture]
    public class AssessmentSectionViewTest
    {
        private const int referenceLineIndex = 0;
        private const int hydraulicBoundaryLocationsIndex = 1;

        [Test]
        public void Constructor_ExpectedValues()
        {
            // Setup
            var assessmentSection = new AssessmentSectionStub();

            // Call
            using (var view = new AssessmentSectionView(assessmentSection))
            {
                // Assert
                Assert.IsInstanceOf<UserControl>(view);
                Assert.IsInstanceOf<IMapView>(view);
                Assert.IsNull(view.Data);

                Assert.AreEqual(1, view.Controls.Count);
                Assert.IsInstanceOf<RingtoetsMapControl>(view.Controls[0]);
                Assert.AreSame(view.Map, ((RingtoetsMapControl) view.Controls[0]).MapControl);
                Assert.AreEqual(DockStyle.Fill, ((Control) view.Map).Dock);
                AssertEmptyMapData(view.Map.Data);
            }
        }

        [Test]
        public void Constructor_AssessmentSectionNull_ThrowsArgumentNullException()
        {
            // Call
            TestDelegate call = () => new AssessmentSectionView(null);

            // Assert
            var exception = Assert.Throws<ArgumentNullException>(call);
            Assert.AreEqual("assessmentSection", exception.ParamName);
        }

        [Test]
        public void Constructor_AssessmentSectionWithBackgroundData_BackgroundDataSet()
        {
            // Setup
            var assessmentSection = new AssessmentSectionStub();

            // Call
            using (var view = new AssessmentSectionView(assessmentSection))
            {
                // Assert
                MapDataTestHelper.AssertImageBasedMapData(assessmentSection.BackgroundData, view.Map.BackgroundMapData);
            }
        }

        [Test]
        public void Constructor_WithReferenceLineAndHydraulicBoundaryDatabase_DataUpdatedToCollectionOfFilledMapData()
        {
            // Setup
            var referenceLine = new ReferenceLine();
            referenceLine.SetGeometry(new[]
            {
                new Point2D(1.0, 2.0),
                new Point2D(2.0, 1.0)
            });

            var assessmentSection = new AssessmentSectionStub
            {
                ReferenceLine = referenceLine
            };
            assessmentSection.SetHydraulicBoundaryLocationCalculations(new[]
            {
                new HydraulicBoundaryLocation(1, "test", 1.0, 2.0)
            });

            // Call
            using (var view = new AssessmentSectionView(assessmentSection))
            {
                // Assert
                Assert.IsInstanceOf<MapDataCollection>(view.Map.Data);
                MapDataCollection mapData = view.Map.Data;
                Assert.IsNotNull(mapData);

                MapData hydraulicBoundaryLocationsMapData = mapData.Collection.ElementAt(hydraulicBoundaryLocationsIndex);
                MapDataTestHelper.AssertHydraulicBoundaryLocationsMapData(assessmentSection, hydraulicBoundaryLocationsMapData);

                MapData referenceLineMapData = mapData.Collection.ElementAt(referenceLineIndex);
                AssertReferenceLineMapData(referenceLine, referenceLineMapData);
            }
        }

        [Test]
        [TestCaseSource(typeof(MapViewTestHelper), nameof(MapViewTestHelper.GetCalculationFuncs))]
        public void GivenViewWithHydraulicBoundaryLocationsData_WhenHydraulicBoundaryLocationCalculationUpdatedAndNotified_ThenMapDataUpdated(
            Func<IAssessmentSection, HydraulicBoundaryLocationCalculation> getCalculationFunc)
        {
            // Given
            var hydraulicBoundaryLocation = new HydraulicBoundaryLocation(1, "test1", 1.0, 2.0);
            var assessmentSection = new AssessmentSectionStub();
            assessmentSection.SetHydraulicBoundaryLocationCalculations(new[]
            {
                hydraulicBoundaryLocation
            });

            using (var view = new AssessmentSectionView(assessmentSection))
            {
                IMapControl map = ((RingtoetsMapControl) view.Controls[0]).MapControl;

                var mocks = new MockRepository();
                IObserver[] observers = AttachMapDataObservers(mocks, map.Data.Collection);
                observers[hydraulicBoundaryLocationsIndex].Expect(obs => obs.UpdateObserver());
                mocks.ReplayAll();

                MapData hydraulicBoundaryLocationsMapData = map.Data.Collection.ElementAt(hydraulicBoundaryLocationsIndex);

                // Precondition
                MapDataTestHelper.AssertHydraulicBoundaryLocationsMapData(assessmentSection, hydraulicBoundaryLocationsMapData);

                // When
                HydraulicBoundaryLocationCalculation calculation = getCalculationFunc(assessmentSection);
                calculation.Output = new TestHydraulicBoundaryLocationCalculationOutput(new Random(21).NextDouble());
                calculation.NotifyObservers();

                // Then
                MapDataTestHelper.AssertHydraulicBoundaryLocationsMapData(assessmentSection, hydraulicBoundaryLocationsMapData);
                mocks.VerifyAll();
            }
        }

        [Test]
        public void GivenViewWithHydraulicBoundaryLocationsDatabase_WhenChangingHydraulicBoundaryLocationsDataAndObserversNotified_ThenMapDataUpdated()
        {
            // Given
            var assessmentSection = new AssessmentSectionStub();
            assessmentSection.SetHydraulicBoundaryLocationCalculations(new[]
            {
                new HydraulicBoundaryLocation(1, "test1", 1.0, 2.0)
            });

            using (var view = new AssessmentSectionView(assessmentSection))
            {
                IMapControl map = ((RingtoetsMapControl) view.Controls[0]).MapControl;

                var mocks = new MockRepository();
                IObserver[] observers = AttachMapDataObservers(mocks, map.Data.Collection);
                observers[hydraulicBoundaryLocationsIndex].Expect(obs => obs.UpdateObserver());
                mocks.ReplayAll();

                MapData hydraulicBoundaryLocationsMapData = map.Data.Collection.ElementAt(hydraulicBoundaryLocationsIndex);

                // Precondition
                MapDataTestHelper.AssertHydraulicBoundaryLocationsMapData(assessmentSection, hydraulicBoundaryLocationsMapData);

                // When
                assessmentSection.SetHydraulicBoundaryLocationCalculations(new[]
                {
                    new HydraulicBoundaryLocation(2, "test2", 2.0, 3.0)
                });
                assessmentSection.HydraulicBoundaryDatabase.Locations.NotifyObservers();

                // Then
                MapDataTestHelper.AssertHydraulicBoundaryLocationsMapData(assessmentSection, hydraulicBoundaryLocationsMapData);
                mocks.VerifyAll();
            }
        }

        [Test]
        public void UpdateObserver_ReferenceLineUpdated_MapDataUpdated()
        {
            // Setup
            var referenceLine = new ReferenceLine();
            referenceLine.SetGeometry(new List<Point2D>
            {
                new Point2D(1.0, 2.0),
                new Point2D(2.0, 1.0)
            });

            var assessmentSection = new AssessmentSectionStub
            {
                ReferenceLine = referenceLine
            };

            using (var view = new AssessmentSectionView(assessmentSection))
            {
                IMapControl map = ((RingtoetsMapControl) view.Controls[0]).MapControl;

                var mocks = new MockRepository();
                IObserver[] observers = AttachMapDataObservers(mocks, map.Data.Collection);
                observers[referenceLineIndex].Expect(obs => obs.UpdateObserver());
                mocks.ReplayAll();

                MapData referenceLineMapData = map.Data.Collection.ElementAt(referenceLineIndex);

                // Precondition
                AssertReferenceLineMapData(assessmentSection.ReferenceLine, referenceLineMapData);

                // Call
                assessmentSection.ReferenceLine.SetGeometry(new List<Point2D>
                {
                    new Point2D(2.0, 5.0),
                    new Point2D(4.0, 3.0)
                });
                assessmentSection.NotifyObservers();

                // Assert
                AssertReferenceLineMapData(assessmentSection.ReferenceLine, referenceLineMapData);
                mocks.VerifyAll();
            }
        }

        [Test]
        public void UpdateObserver_DataUpdated_MapLayersSameOrder()
        {
            // Setup
            var referenceLine = new ReferenceLine();
            referenceLine.SetGeometry(new[]
            {
                new Point2D(1.0, 2.0),
                new Point2D(2.0, 1.0)
            });

            var assessmentSection = new AssessmentSectionStub
            {
                ReferenceLine = referenceLine
            };
            assessmentSection.SetHydraulicBoundaryLocationCalculations(new[]
            {
                new HydraulicBoundaryLocation(1, "test1", 1.0, 2.0)
            });

            using (var view = new AssessmentSectionView(assessmentSection))
            {
                MapDataCollection mapData = view.Map.Data;

                MapData dataToMove = mapData.Collection.ElementAt(0);
                mapData.Remove(dataToMove);
                mapData.Add(dataToMove);

                // Precondition
                var referenceLineMapData = (MapLineData) mapData.Collection.ElementAt(referenceLineIndex + 1);
                Assert.AreEqual("Referentielijn", referenceLineMapData.Name);

                var hrLocationsMapData = (MapPointData) mapData.Collection.ElementAt(hydraulicBoundaryLocationsIndex - 1);
                Assert.AreEqual("Hydraulische belastingen", hrLocationsMapData.Name);

                // Call
                assessmentSection.SetHydraulicBoundaryLocationCalculations(new[]
                {
                    new HydraulicBoundaryLocation(2, "test2", 2.0, 3.0)
                });
                assessmentSection.HydraulicBoundaryDatabase.Locations.NotifyObservers();

                // Assert
                var actualReferenceLineMapData = (MapLineData) mapData.Collection.ElementAt(referenceLineIndex + 1);
                Assert.AreEqual("Referentielijn", actualReferenceLineMapData.Name);

                var actualHrLocationsMapData = (MapPointData) mapData.Collection.ElementAt(hydraulicBoundaryLocationsIndex - 1);
                Assert.AreEqual("Hydraulische belastingen", actualHrLocationsMapData.Name);
            }
        }

        private static void AssertReferenceLineMapData(ReferenceLine referenceLine, MapData referenceLineMapData)
        {
            MapDataTestHelper.AssertReferenceLineMapData(referenceLine, referenceLineMapData);
            Assert.IsTrue(referenceLineMapData.IsVisible);
        }

        private static void AssertEmptyMapData(MapDataCollection mapDataCollection)
        {
            Assert.AreEqual("Trajectkaart", mapDataCollection.Name);

            List<MapData> mapDataList = mapDataCollection.Collection.ToList();

            Assert.AreEqual(2, mapDataList.Count);

            var referenceLineMapData = (MapLineData) mapDataList[referenceLineIndex];
            var hydraulicBoundaryLocationsMapData = (MapPointData) mapDataList[hydraulicBoundaryLocationsIndex];

            CollectionAssert.IsEmpty(referenceLineMapData.Features);
            CollectionAssert.IsEmpty(hydraulicBoundaryLocationsMapData.Features);

            Assert.AreEqual("Referentielijn", referenceLineMapData.Name);
            Assert.AreEqual("Hydraulische belastingen", hydraulicBoundaryLocationsMapData.Name);
        }

        /// <summary>
        /// Attaches mocked observers to all <see cref="IObservable"/> map data components.
        /// </summary>
        /// <param name="mocks">The <see cref="MockRepository"/>.</param>
        /// <param name="mapData">The map data collection containing the <see cref="IObservable"/>
        /// elements.</param>
        /// <returns>An array of mocked observers attached to the data in <paramref name="mapData"/>.</returns>
        private static IObserver[] AttachMapDataObservers(MockRepository mocks, IEnumerable<MapData> mapData)
        {
            MapData[] mapDataArray = mapData.ToArray();

            var referenceLineMapDataObserver = mocks.StrictMock<IObserver>();
            mapDataArray[referenceLineIndex].Attach(referenceLineMapDataObserver);

            var hydraulicBoundaryLocationsMapDataObserver = mocks.StrictMock<IObserver>();
            mapDataArray[hydraulicBoundaryLocationsIndex].Attach(hydraulicBoundaryLocationsMapDataObserver);

            return new[]
            {
                referenceLineMapDataObserver,
                hydraulicBoundaryLocationsMapDataObserver
            };
        }
    }
}