// Copyright (C) Stichting Deltares and State of the Netherlands 2025. All rights reserved.
//
// This file is part of Riskeer.
//
// Riskeer is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser 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.Components.Gis.Features;
using Core.Components.Gis.Style;
using Core.Components.Gis.Theme;

namespace Core.Components.Gis.Data
{
    /// <summary>
    /// This class represents features that are visible as points.
    /// </summary>
    public class MapPointData : FeatureBasedMapData<PointCategoryTheme>
    {
        /// <summary>
        /// Creates a new instance of <see cref="MapPointData"/> with default styling.
        /// </summary>
        /// <param name="name">The name of the <see cref="MapPointData"/>.</param>
        /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is 
        /// <c>null</c> or only whitespace.</exception>
        public MapPointData(string name) : this(name, CreateDefaultPointStyle()) {}

        /// <summary>
        /// Creates a new instance of <see cref="MapPointData"/>.
        /// </summary>
        /// <param name="name">The name of the <see cref="MapPointData"/>.</param>
        /// <param name="style">The style of the data.</param>
        /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is 
        /// <c>null</c> or only whitespace.</exception>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="style"/>
        /// is <c>null</c>.</exception>
        public MapPointData(string name, PointStyle style) : base(name)
        {
            if (style == null)
            {
                throw new ArgumentNullException(nameof(style));
            }

            Style = style;
        }

        /// <summary>
        /// Creates a new instance of <see cref="MapPointData"/>.
        /// </summary>
        /// <param name="name">The name of the <see cref="MapPointData"/>.</param>
        /// <param name="style">The default style of the data that is not categorized by the categories
        /// defined in <paramref name="mapTheme"/>.</param>
        /// <param name="mapTheme">The map theme belong to the data.</param>
        /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is 
        /// <c>null</c> or only whitespace.</exception>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="style"/>
        /// is <c>null</c>.</exception>
        public MapPointData(string name, PointStyle style, MapTheme<PointCategoryTheme> mapTheme)
            : base(name, mapTheme)
        {
            if (style == null)
            {
                throw new ArgumentNullException(nameof(style));
            }

            Style = style;
        }

        /// <summary>
        /// Gets the style of the points.
        /// </summary>
        public PointStyle Style { get; }

        /// <summary>
        /// This method validates newly set features.
        /// </summary>
        /// <param name="featuresToValidate">The new features to validate.</param>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="featuresToValidate"/> is <c>null</c>.</exception>
        /// <exception cref="ArgumentException">Thrown when any feature in <paramref name="featuresToValidate"/> 
        /// contains multiple point-collections.</exception>
        /// <seealso cref="Features"/>
        protected override void ValidateFeatures(IEnumerable<MapFeature> featuresToValidate)
        {
            base.ValidateFeatures(featuresToValidate);

            if (HasFeatureWithMultiplePointCollections(featuresToValidate))
            {
                throw new ArgumentException("MapPointData only accepts MapFeature instances whose MapGeometries contain a single point-collection.");
            }
        }

        private static PointStyle CreateDefaultPointStyle()
        {
            return new PointStyle
            {
                Color = Color.Black,
                Size = 2,
                Symbol = PointSymbol.Square,
                StrokeColor = Color.Black,
                StrokeThickness = 1
            };
        }

        private static bool HasFeatureWithMultiplePointCollections(IEnumerable<MapFeature> pointFeatures)
        {
            return pointFeatures.Where(feature => feature != null)
                                .SelectMany(feature => feature.MapGeometries)
                                .Any(geometry => geometry.PointCollections.Count() != 1);
        }
    }
}