using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.WPF;
using Syncfusion.UI.Xaml.Diagram;
using Color = System.Drawing.Color;
using Image = System.Windows.Controls.Image;
using Path = System.Windows.Shapes.Path;

namespace PRSDesktop
{
    public class QuoteDiagramSymbolModel : NodeViewModel
    {
    }

    public class QuoteDiagramAreaModel : NodeViewModel
    {
    }

    public class QuoteDiagramConnectorModel : ConnectorViewModel
    {
    }

    public class QuoteDiagramScalerModel : NodeViewModel
    {
    }

    public static class QuoteDiagramSymbolCache
    {
        private static MultiQuery _data;
        private static CoreTable _documents;
        private static ObservableCollection<GroupableViewModel> _symbols;
        private static ResourceDictionary _resources;

        public static ResourceDictionary Resources => GetResources();

        public static IEnumerable<QuoteDiagramSymbolModel> Symbols
        {
            get
            {
                CheckCache();
                return _symbols.OfType<QuoteDiagramSymbolModel>();
            }
        }

        public static IEnumerable<QuoteDiagramAreaModel> Areas
        {
            get
            {
                CheckCache();
                return _symbols.OfType<QuoteDiagramAreaModel>();
            }
        }

        public static IEnumerable<QuoteDiagramConnectorModel> Connectors
        {
            get
            {
                CheckCache();
                return _symbols.OfType<QuoteDiagramConnectorModel>();
            }
        }

        public static IEnumerable<QuoteDiagramScalerModel> Scalers
        {
            get
            {
                CheckCache();
                return _symbols.OfType<QuoteDiagramScalerModel>();
            }
        }

        private static ResourceDictionary GetResources()
        {
            if (_resources == null)
            {
                _resources = new ResourceDictionary();
                _resources.Source = new Uri("/Syncfusion.SfDiagram.Wpf;component/Resources/BasicShapes.xaml", UriKind.RelativeOrAbsolute);
            }

            return _resources;
        }

        private static TModel CreateModel<TModel, TEntity>(CoreRow row)
            where TModel : GroupableViewModel, new()
            where TEntity : QuoteDiagramEntity
        {
            var result = new TModel();
            result.ID = row.Get<TEntity, Guid>(x => x.ID).ToString();
            result.Key = row.Get<TEntity, string>(x => x.Group);
            result.Name = row.Get<TEntity, string>(x => x.Caption);

            return result;
        }

        private static QuoteDiagramSymbolModel CreateSymbol(CoreRow row)
        {
            var result = CreateModel<QuoteDiagramSymbolModel, QuoteDiagramSymbol>(row);
            result.UnitHeight = row.Get<QuoteDiagramSymbol, int>(x => x.Length) / 100F;
            result.UnitWidth = row.Get<QuoteDiagramSymbol, int>(x => x.Width) / 100F;

            result.ContentTemplate = TemplateGenerator.CreateDataTemplate(() =>
            {
                var symbolid = row.EntityLinkID<QuoteDiagramSymbol, VectorDocumentLink>(x => x.Symbol) ?? Guid.Empty;
                if (symbolid != Guid.Empty)
                {
                    var Image = new Image();
                    var docrow = _documents.Rows.FirstOrDefault(r => r.Get<Document, Guid>(c => c.ID).Equals(symbolid));
                    if (docrow != null)
                    {
                        var data = docrow.Get<Document, byte[]>(x => x.Data);
                        if (data != null && data.Length != 0)
                            using (var ms = new MemoryStream(data))
                            {
                                var emf = new Metafile(ms);
                                //Image.Source = emf.AsBitmapSource((int)(node.UnitWidth * 100.0F), (int)(node.UnitHeight * 100.0F), System.Drawing.Color.Red);
                                Image.Source = emf.AsBitmapSource((int)(result.UnitWidth * 10.0F), (int)(result.UnitHeight * 10.0F),
                                    Color.Transparent);
                            }
                    }

                    return Image;
                }

                return null;
                //else
                //{

                //    var svg = new System.Windows.Shapes.Path();

                //    String geometry = row.Get<QuoteDiagramSymbol, String>(x => x.Geometry);
                //    if (String.IsNullOrWhiteSpace(geometry))
                //        svg.Data = new RectangleGeometry(new Rect(0, 0, row.Get<QuoteDiagramSymbol, int>(x => x.Width), row.Get<QuoteDiagramSymbol, int>(x => x.Length)));
                //    else
                //        svg.Data = Geometry.Parse(geometry);

                //    svg.Stretch = Stretch.Fill;
                //    svg.Fill = new SolidColorBrush(ImageUtils.StringToMediaColor(row.Get<QuoteDiagramSymbol, String>(x => x.FillColor)));
                //    svg.Stroke = new SolidColorBrush(ImageUtils.StringToMediaColor(row.Get<QuoteDiagramSymbol, String>(x => x.LineColor)));
                //    svg.StrokeThickness = 1.0F;
                //    return svg;
                //}
            });

            if (row.Get<QuoteDiagramSymbol, bool>(x => x.ShowCaption))
                result.Annotations = new AnnotationCollection
                {
                    new AnnotationEditorViewModel
                    {
                        Content = row.Get<QuoteDiagramSymbol, string>(x => x.Caption)
                    }
                };

            var json = row.Get<QuoteDiagramSymbol, string>(x => x.Ports);

            var ports = string.IsNullOrWhiteSpace(json)
                ? new QuoteDiagramSymbolPort[] { }
                : Serialization.Deserialize<QuoteDiagramSymbolPort[]>(json);
            if (ports.Any())
            {
                (result.Ports as PortCollection).Clear();
                foreach (var port in ports)
                {
                    var model = new NodePortViewModel { NodeOffsetX = port.X / 100.0F, NodeOffsetY = port.Y / 100.0F };
                    (result.Ports as PortCollection).Add(model);
                }
            }

            return result;
        }

        private static QuoteDiagramAreaModel CreateArea(CoreRow row)
        {
            var result = CreateModel<QuoteDiagramAreaModel, QuoteDiagramArea>(row);
            result.UnitHeight = row.Get<QuoteDiagramArea, int>(x => x.Length) / 100F;
            result.UnitWidth = row.Get<QuoteDiagramArea, int>(x => x.Width) / 100F;
            result.ContentTemplate = TemplateGenerator.CreateDataTemplate(() =>
            {
                var svg = new Path();
                svg.Data = new RectangleGeometry(new Rect(0, 0, result.UnitWidth, result.UnitHeight));
                svg.Stretch = Stretch.Fill;
                svg.Fill = new SolidColorBrush(ImageUtils.StringToMediaColor(row.Get<QuoteDiagramArea, string>(x => x.FillColor))) { Opacity = 0.5f };
                svg.Stroke = new SolidColorBrush(ImageUtils.StringToMediaColor(row.Get<QuoteDiagramArea, string>(x => x.LineColor)));
                svg.StrokeThickness = 1.0F;
                return svg;
            });

            result.Constraints = NodeConstraints.Default & ~NodeConstraints.Connectable;

            result.Annotations = new AnnotationCollection
            {
                new AnnotationEditorViewModel
                {
                    Content = row.Get<QuoteDiagramArea, string>(x => x.Caption)
                }
            };
            return result;
        }

        private static QuoteDiagramConnectorModel CreateConnector(CoreRow row)
        {
            var result = CreateModel<QuoteDiagramConnectorModel, QuoteDiagramConnector>(row);

            var width = (double)row.Get<QuoteDiagramConnector, int>(x => x.Width) / 100F;
            var length = (double)row.Get<QuoteDiagramConnector, int>(x => x.Length) / 100F;
            if (length == 0.0F)
                length = 100F;
            length = length * length;
            var side = length / 2.0F;
            side = Math.Sqrt(side);

            result.SourcePoint = new Point(width, width);
            result.TargetPoint = new Point(side + width, side + width);

            var connectorstyle = new Style(typeof(Path));
            connectorstyle.Setters.Add(new Setter(Shape.StrokeProperty,
                new SolidColorBrush(ImageUtils.StringToMediaColor(row.Get<QuoteDiagramConnector, string>(x => x.Color)))));
            connectorstyle.Setters.Add(new Setter(Shape.StrokeThicknessProperty, width));
            result.ConnectorGeometryStyle = connectorstyle;

            IConnectorSegment segment = null;
            if (row.Get<QuoteDiagramConnector, QuoteDiagramConnectorType>(x => x.Type) == QuoteDiagramConnectorType.StraightLine)
                segment = new StraightSegment();
            else if (row.Get<QuoteDiagramConnector, QuoteDiagramConnectorType>(x => x.Type) == QuoteDiagramConnectorType.OrthogonalLine)
                segment = new OrthogonalSegment();
            else if (row.Get<QuoteDiagramConnector, QuoteDiagramConnectorType>(x => x.Type) == QuoteDiagramConnectorType.CubicBezier)
                segment = new CubicCurveSegment();
            else if (row.Get<QuoteDiagramConnector, QuoteDiagramConnectorType>(x => x.Type) == QuoteDiagramConnectorType.QuadraticBezier)
                segment = new QuadraticCurveSegment();

            if (segment is StraightSegment || segment is OrthogonalSegment)
                result.CornerRadius = width;
            result.Segments = new ObservableCollection<IConnectorSegment> { segment };

            return result;
        }

        public static QuoteDiagramScalerModel CreateScaler()
        {
            var result = new QuoteDiagramScalerModel();
            result.ID = CoreUtils.FullGuid.ToString();
            result.Key = "";
            result.Name = "";
            result.UnitHeight = 10F;
            result.UnitWidth = 100F;

            result.ContentTemplate = TemplateGenerator.CreateDataTemplate(() =>
            {
                var svg = new Path();
                svg.Data = svg.Data =
                    Geometry.Parse(
                        "M 000 000 L 000 100 M 050 025 L 000 050 L 050 075 M 000 050 L 400 050 L 400 075 L 600 075 L 600 025 L 400 025 L 400 050 M 600 050 L 1000 050 M 1000 000 L 1000 100 M 950 25 L 1000 050 L 950 075");
                svg.Stretch = Stretch.Fill;
                svg.Stroke = new SolidColorBrush(Colors.Firebrick);
                svg.StrokeThickness = 1.0F;
                return svg;
            });

            result.Constraints = NodeConstraints.AllowDrop | NodeConstraints.ResizeWest | NodeConstraints.ResizeEast | NodeConstraints.Draggable |
                                 NodeConstraints.Selectable | NodeConstraints.Rotatable | NodeConstraints.Delete;

            result.Annotations = new AnnotationCollection
            {
                new AnnotationEditorViewModel
                {
                    Content = "1000"
                }
            };

            return result;
        }

        private static void CheckCache()
        {
            if (_symbols == null)
            {
                var bLoading = true;

                _symbols = new ObservableCollection<GroupableViewModel>();

                _data = new MultiQuery();
                _data.Add(new Filter<QuoteDiagramSymbol>(x => x.Active).IsEqualTo(true));
                _data.Add(new Filter<QuoteDiagramConnector>(x => x.Active).IsEqualTo(true));
                _data.Add(new Filter<QuoteDiagramArea>(x => x.Active).IsEqualTo(true));
                _data.Query();

                var symbols = _data.Get<QuoteDiagramSymbol>();

                var docids = symbols.ExtractValues<QuoteDiagramSymbol, Guid>(x => x.Symbol.ID).Where(x => x != Guid.Empty).ToArray();
                _documents = new Client<Document>().Query(new Filter<Document>(x => x.ID).InList(docids));

                foreach (var row in symbols.Rows)
                    _symbols.Add(CreateSymbol(row));

                var areas = _data.Get<QuoteDiagramArea>();
                foreach (var row in areas.Rows)
                    _symbols.Add(CreateArea(row));

                var connectors = _data.Get<QuoteDiagramConnector>();
                foreach (var row in connectors.Rows)
                    _symbols.Add(CreateConnector(row));

                _symbols.Add(CreateScaler());

                bLoading = false;
            }
        }

        public static void Refresh()
        {
            _data = null;
            _documents = null;
            _symbols = null;
            _resources = null;
        }
    }
}