// Copyright (C) Stichting Deltares 2017. 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.Drawing;
using System.Linq;
using Core.Common.Base.Geometry;
using Core.Common.Controls.Commands;
using Core.Common.Gui.Commands;
using Core.Components.Gis.Data;
using Core.Components.Gis.Features;
using Core.Components.Gis.Geometries;
using Core.Components.Gis.Theme;
using Demo.Ringtoets.Properties;

namespace Demo.Ringtoets.Commands
{
    /// <summary>
    /// The command for opening a view for <see cref="MapData"/> with 
    /// categorial theming on random data.
    /// </summary>
    public class OpenThematicalMapViewCommand : ICommand
    {
        private readonly IViewCommands viewCommands;
        private const string selectedMetaDataAttributeName = "Waarde";

        /// <summary>
        /// Creates a new instance of <see cref="OpenThematicalMapViewCommand"/>.
        /// </summary>
        /// <param name="viewCommands">The <see cref="IViewCommands"/> to be used internally.</param>
        public OpenThematicalMapViewCommand(IViewCommands viewCommands)
        {
            this.viewCommands = viewCommands;
        }

        public bool Checked { get; } = false;

        public void Execute()
        {
            var mapDataCollection = new MapDataCollection(Resources.OpenThematicalMapViewCommand_Execute_Demo_map_with_theming);

            var mapPointDataEqualCriteria = new MapPointData(Resources.OpenThematicalMapViewCommand_Execute_MapPointData_with_EqualValueCriteria)
            {
                Features = CreateMapPointFeaturesWithMetaData(40),
                Style =
                {
                    Size = 10
                },
                SelectedMetaDataAttribute = selectedMetaDataAttributeName
            };
            SetEqualCriteria(mapPointDataEqualCriteria);
            mapDataCollection.Add(mapPointDataEqualCriteria);

            var mapPointDataUnequalCriteria = new MapPointData(Resources.OpenThematicalMapViewCommand_Execute_MapPointData_with_UnequalValueCriteria)
            {
                Features = CreateMapPointFeaturesWithMetaData(15),
                Style =
                {
                    Size = 10
                },
                SelectedMetaDataAttribute = selectedMetaDataAttributeName
            };
            SetUnequalCriteria(mapPointDataUnequalCriteria);
            mapDataCollection.Add(mapPointDataUnequalCriteria);

            var mapLineDataEqualCriteria = new MapLineData(Resources.OpenThematicalMapViewCommand_Execute_MapLineData_with_EqualValueCriteria)
            {
                Features = CreateMapLineFeaturesWithMetaData(40),
                SelectedMetaDataAttribute = selectedMetaDataAttributeName
            };
            SetEqualCriteria(mapLineDataEqualCriteria);
            mapDataCollection.Add(mapLineDataEqualCriteria);

            var mapLineDataUnequalCriteria = new MapLineData(Resources.OpenThematicalMapViewCommand_Execute_MapLineData_with_UnequalValueCriteria)
            {
                Features = CreateMapLineFeaturesWithMetaData(10),
                SelectedMetaDataAttribute = selectedMetaDataAttributeName
            };
            SetUnequalCriteria(mapLineDataUnequalCriteria);
            mapDataCollection.Add(mapLineDataUnequalCriteria);

            var mapPolygonDataEqualCriteria = new MapPolygonData(Resources.OpenThematicalMapViewCommand_Execute_MapPolygonData_with_EqualValueCriteria)
            {
                Features = CreatePolygonFeaturesWithMetaData(40),
                SelectedMetaDataAttribute = selectedMetaDataAttributeName
            };
            SetEqualCriteria(mapPolygonDataEqualCriteria);
            mapDataCollection.Add(mapPolygonDataEqualCriteria);

            var mapPolygonDataUnequalCriteria = new MapPolygonData(Resources.OpenThematicalMapViewCommand_Execute_MapPolygonData_with_UnequalValueCriteria)
            {
                Features = CreatePolygonFeaturesWithMetaData(10),
                SelectedMetaDataAttribute = selectedMetaDataAttributeName
            };
            SetUnequalCriteria(mapPolygonDataUnequalCriteria);
            mapDataCollection.Add(mapPolygonDataUnequalCriteria);

            viewCommands.OpenView(mapDataCollection);
        }

        private static void SetEqualCriteria(FeatureBasedMapData mapData)
        {
            var random = new Random(13);
            int nrOfFeatures = mapData.Features.Count();
            var theme = new MapTheme("Waarde", new[]
            {
                new CategoryTheme(Color.DarkOrange, new ValueCriterion(ValueCriterionOperator.EqualValue, random.Next(0, nrOfFeatures))),
                new CategoryTheme(Color.OrangeRed, new ValueCriterion(ValueCriterionOperator.EqualValue, random.Next(0, nrOfFeatures))),
                new CategoryTheme(Color.SkyBlue, new ValueCriterion(ValueCriterionOperator.EqualValue, random.Next(0, nrOfFeatures))),
                new CategoryTheme(Color.GreenYellow, new ValueCriterion(ValueCriterionOperator.EqualValue, random.Next(0, nrOfFeatures)))
            });

            mapData.MapTheme = theme;
        }

        private static void SetUnequalCriteria(FeatureBasedMapData mapData)
        {
            var random = new Random(37);
            int nrOfFeatures = mapData.Features.Count();
            var theme = new MapTheme("Waarde", new[]
            {
                new CategoryTheme(Color.Purple, new ValueCriterion(ValueCriterionOperator.UnequalValue, random.Next(0, nrOfFeatures)))
            });

            mapData.MapTheme = theme;
        }

        private static IEnumerable<MapFeature> CreateMapPointFeaturesWithMetaData(int nrOfPoints)
        {
            const double offset = 12;
            double xCoordinate = 0;

            var features = new MapFeature[nrOfPoints];

            for (var i = 0; i < nrOfPoints; i++)
            {
                MapFeature feature = GetFeatureWithPoints(new[]
                {
                    new Point2D(xCoordinate, 0)
                });
                feature.MetaData[selectedMetaDataAttributeName] = i;
                features[i] = feature;

                xCoordinate += offset;
            }

            return features;
        }

        private static IEnumerable<MapFeature> CreateMapLineFeaturesWithMetaData(int nrOfLines)
        {
            double xCoordinate = 0;

            var features = new MapFeature[nrOfLines];

            for (var i = 0; i < nrOfLines; i++)
            {
                MapFeature feature = GetFeatureWithPoints(new[]
                {
                    new Point2D(xCoordinate, 0),
                    new Point2D(xCoordinate++, 10)
                });
                feature.MetaData[selectedMetaDataAttributeName] = i;
                features[i] = feature;
            }

            return features;
        }

        private static IEnumerable<MapFeature> CreatePolygonFeaturesWithMetaData(int nrOfPolygons)
        {
            const double offset = 3;
            double leftCoordinate = 0;
            double rightCoordinate = 1;

            var features = new MapFeature[nrOfPolygons];

            for (var i = 0; i < nrOfPolygons; i++)
            {
                MapFeature feature = GetFeatureWithPoints(new[]
                {
                    new Point2D(leftCoordinate, 0),
                    new Point2D(leftCoordinate, 5),
                    new Point2D(rightCoordinate, 5),
                    new Point2D(rightCoordinate, 0),
                    new Point2D(leftCoordinate, 0)
                });
                feature.MetaData[selectedMetaDataAttributeName] = i;
                features[i] = feature;

                leftCoordinate += offset;
                rightCoordinate += offset;
            }

            return features;
        }

        private static MapFeature GetFeatureWithPoints(Point2D[] points)
        {
            return new MapFeature(new[]
            {
                new MapGeometry(new[]
                {
                    points
                })
            });
        }
    }
}