// 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 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.Linq;
using System.Windows.Forms;
using Core.Common.Base;
using Core.Common.Controls.TreeView;
using Core.Common.Controls.Views;
using Core.Components.DotSpatial.Forms;
using Core.Components.Gis.Data;

using DotSpatialResources = Core.Plugins.DotSpatial.Properties.Resources;
using GuiResources = Core.Common.Gui.Properties.Resources;

namespace Core.Plugins.DotSpatial.Legend
{
    /// <summary>
    /// The view which shows the data that is added to a <see cref="BaseMap"/>.
    /// </summary>
    public sealed partial class MapLegendView : UserControl, IView
    {
        private readonly TreeViewControl treeViewControl;

        /// <summary>
        /// Creates a new instance of <see cref="MapLegendView"/>.
        /// </summary>
        public MapLegendView()
        {
            InitializeComponent();
            Text = DotSpatialResources.General_Map;

            treeViewControl = new TreeViewControl
            {
                Dock = DockStyle.Fill
            };
            Controls.Add(treeViewControl);

            RegisterTreeNodeInfos();
        }

        public object Data
        {
            get
            {
                return (MapData) treeViewControl.Data;
            }
            set
            {
                if (IsDisposed)
                {
                    return;
                }

                treeViewControl.Data = (MapData) value;
            }
        }

        protected override void Dispose(bool disposing)
        {
            Data = null;

            if (disposing && (components != null))
            {
                components.Dispose();
            }

            base.Dispose(disposing);
        }

        private void RegisterTreeNodeInfos()
        {
            treeViewControl.RegisterTreeNodeInfo(new TreeNodeInfo<MapPointData>
            {
                Text = mapPointData => mapPointData.Name,
                Image = mapPointData => DotSpatialResources.PointsIcon,
                CanDrag = (mapPointData, parentData) => true,
                CanCheck = mapPointData => true,
                IsChecked = mapPointData => mapPointData.IsVisible,
                OnNodeChecked = MapPointDataOnNodeChecked
            });

            treeViewControl.RegisterTreeNodeInfo(new TreeNodeInfo<MapLineData>
            {
                Text = mapLineData => mapLineData.Name,
                Image = mapLineData => DotSpatialResources.LineIcon,
                CanDrag = (mapLineData, parentData) => true,
                CanCheck = mapLineData => true,
                IsChecked = mapLineData => mapLineData.IsVisible,
                OnNodeChecked = MapLineDataOnNodeChecked
            });

            treeViewControl.RegisterTreeNodeInfo(new TreeNodeInfo<MapPolygonData>
            {
                Text = mapPolygonData => mapPolygonData.Name,
                Image = mapPolygonData => DotSpatialResources.AreaIcon,
                CanDrag = (mapPolygonData, parentData) => true,
                CanCheck = mapPolygonData => true,
                IsChecked = mapPolygonData => mapPolygonData.IsVisible,
                OnNodeChecked = MapPolygonDataOnNodeChecked
            });

            treeViewControl.RegisterTreeNodeInfo(new TreeNodeInfo<MapDataCollection>
            {
                Text = mapDataCollection => mapDataCollection.Name,
                Image = mapDataCollection => GuiResources.folder,
                ChildNodeObjects = mapDataCollection => mapDataCollection.List.Reverse().Cast<object>().ToArray(),
                CanDrop = BaseMapCanDrop,
                CanInsert = BaseMapCanInsert,
                OnDrop = BaseMapOnDrop
            });

            treeViewControl.RegisterTreeNodeInfo(new TreeNodeInfo<MapMultiLineData>
            {
                Text = mapMultiLineData => mapMultiLineData.Name,
                Image = mapMultiLineData => DotSpatialResources.LineIcon,
                CanDrag = (mapMultiLineData, parentData) => true,
                CanCheck = mapMultiLineData => true,
                IsChecked = mapMultiLineData => mapMultiLineData.IsVisible,
                OnNodeChecked = MapMultiLineDataOnNodeChecked
            });
        }

        #region MapData

        private void MapPointDataOnNodeChecked(MapPointData mapPointData, object parentData)
        {
            PointBasedMapDataOnNodeChecked(mapPointData, parentData);
        }

        private void MapLineDataOnNodeChecked(MapLineData mapLineData, object parentData)
        {
            PointBasedMapDataOnNodeChecked(mapLineData, parentData);
        }

        private void MapPolygonDataOnNodeChecked(MapPolygonData mapPolygonData, object parentData)
        {
            PointBasedMapDataOnNodeChecked(mapPolygonData, parentData);
        }

        private void MapMultiLineDataOnNodeChecked(MapMultiLineData mapMultiLineData, object parentData)
        {
            mapMultiLineData.IsVisible = !mapMultiLineData.IsVisible;
            mapMultiLineData.NotifyObservers();

            var observableParent = parentData as IObservable;
            if (observableParent != null)
            {
                observableParent.NotifyObservers();
            }
        }

        private void PointBasedMapDataOnNodeChecked(PointBasedMapData pointBasedMapData, object parentData)
        {
            pointBasedMapData.IsVisible = !pointBasedMapData.IsVisible;
            pointBasedMapData.NotifyObservers();

            var observableParent = parentData as IObservable;
            if (observableParent != null)
            {
                observableParent.NotifyObservers();
            }
        }

        #endregion

        # region MapDataCollection

        private static bool BaseMapCanDrop(object draggedData, object targetData)
        {
            return draggedData is MapData;
        }

        private static bool BaseMapCanInsert(object draggedData, object targetData)
        {
            return draggedData is MapData;
        }

        private static void BaseMapOnDrop(object droppedData, object newParentData, object oldParentData, int position, TreeViewControl control)
        {
            var mapData = (MapData)droppedData;
            var target = (MapDataCollection)newParentData;

            target.List.Remove(mapData);
            target.List.Insert(target.List.Count - position, mapData); // Note: target is the same as the previous parent in this case
            target.NotifyObservers();
        }

        # endregion
    }
}